Porting and polishing rolls: amzn.to/2BjZ82n Long reach porting mandrel: amzn.to/35JHAui Air die grinder: amzn.to/33D4LVp Air die grinder (cheaper option): amzn.to/2MMvurX Electrical die grinder if you don't have a compressor: amzn.to/2MHLNGc

@trumanhw

2 жыл бұрын

maybe one day you'll redo this one with talking. :)

This is one part of the project your wife will appreciate!

Just a tip that may help you in the future … what I do to protect the valve seats is covering them with masking tape in very small pieces when you add enough layers (takes about an hour for a 16 valve head ) you cannot “nick” the seat or damage it any normal accidental way worst case you may lift a layer of tape and it come right off after words and who doesn’t throughly clean a head after porting

@afoster1621

2 жыл бұрын

Im even more of a novice than anyone having done none of this work but that was exactly the first thing that came to mind. Or even a sacrificial piece of metal or rubber that sites over the seat. Why risk

This is the very definition of a useful KZread video. Good information, plenty of comments on what's going on, no stupid theatrics & music that doesn't drive you crazy by the end of the video. Great job!

Bloody excellent video.Removes all of the mystique about porting the heads.This is the sort of video that gives you the impetus to get up & give it a go.

The best thing to do is get your seats machined first so you can get your throat percentages correct and blend accordingly. if you do happen to touch the seats it's only a matter of a quick touch up. The intake SSR should also be straightened up and widened as they're already reaching well over 360fps. Lastly don't worry about smoothing those intakes, just grab the roughest burr have and blend the whole port using that. EFI or Carbureted does not matter, your fuel isn't being injected directly into the chamber so you will still get pooling but most of all it's about getting your boundary layer correct. Good for you for having a crack though! most people are too scared to attempt porting

7:23 taught me about so much more than just engines

Just so you know those edges/lumps on the cylinder head are there for a reason. The idea is to create a controlled turbulent flow, in your case I believe is the a tumble/barrel flow, as the mixture flows into the combustion chamber the mixture follows a tumble flow pattern, creating a circular movement around the X axis. When the piston moves towards TDC in the compression stroke, the radius of that circular flow decreases increasing the angular velocity of the flow. All this turbulence allows the fuel to mix more evenly throughout the cylinder , therefore you will reduce knock and increase the efficiency of your combustion, in other words you will have a bigger bang. Getting rid of those edges is destroying an Engineering piece of work. The reason they are rough is because it costs too much money to get them smooth, so making a smooth surface does help, but do not get rid of the of the edges/lumps like you did when you said you were blending the sharp edges to the combustion chamber. Hope that helps! Cheers

@heikkianttila6296

2 жыл бұрын

The sharp edges in a performance engine's combustion chamber are very problematic. They end up heating up more and become starting points of pre-ignition and knocking. What was done on the video makes sense.

@ricardocandeias9163

Жыл бұрын

It really makes sense what you said! Picking that idea of controlled turbulence, one should work in a fashion to create smoother, and better flowing air inside the chamber, neverminding the objective of those lumps. Thats my idea !

@ricardocandeias9163

Жыл бұрын

@@heikkianttila6296 I believe that getting rid of the edges and just smoothing them up to reduce pointy edges is a good work to be done

I "think" a comparison on the flow bench, before and after would have been a good idea !!!

@marklowe7431

3 жыл бұрын

@LAD Teknologies If your goal is to increase port flow, flow testing before and after at given valve lift intervals is a standard procedure. Usually without porting it is still important to understand the flow rates to correctly select camshaft and calculate a predictable outcome. Not sure what point you're trying to make here.

@caperformance_motorsports

3 жыл бұрын

@LAD Teknologies wtf are you talking about ? A flow bench will give you the data aka flow numbers at different valve heights , sizes ect ect ….

@caperformance_motorsports

3 жыл бұрын

@@marklowe7431 apparently the person has no idea wtf they are talking about …. Flow benches have been the highway performance industry “standard “for the “truth” between ported heads aside from dyno numbers and *track slips* - which are the real truth behind anything done to increase performance

@caperformance_motorsports

3 жыл бұрын

@@marklowe7431 considering they can’t spell technologies correct tells a lot about their knowledge past their incorrect information in their comment.

Interesting video. I haven't ported and flowed a cylinder head for 40 years and more and that was for engines used in drag racing. They were full race jobs with the biggest valves possible and all ports enlarged to fit whatever manifolds were being used. When blending the combustion chambers it was always essential to measure the chamber volumes to ensure they were as close as possible identical to ensure compression ratios were equal. Skimming the head after blending the combustion chambers was also essential to bring the compression ratio back to where you wanted it. I'm not convinced of Stage 1 porting on most modern engines myself because manufacturing on most cars is so good and a little bit of turbulence is good news. 👍

Great video. I’ve never used all those different grits. 80 thru 120 and will look like a mirror with a last pass of 80 scotch bright pad on a old valve I cut and slit in the middle and slide scotch pad in between🤟🏼

I'm currently enrolled in a 2 year automotive technology program in college. In my Engines lab I'm rebuilding a Chevy Cruze cylinder head and I asked my instructor about porting it. He told me it's not a good idea to polish the intake ports because the roughness helps atomize the fuel coming into the combustion chamber. Of course this is only relevant with port and throttle body injection setups. Very good video though.

@tomassosaoconnor

5 жыл бұрын

What I have understood: the "rough" surface creates little turbulences, creating a layer of low velocity air; the air coming into the engine meets the low velocity layer, and the friction coefficient of the air with air is low so... better flow! Please, correct me if I'm wrong Greetings from Argentina!

@bestleesinna7702

5 жыл бұрын

No, the roughness doesn't help with atomization enough to make a difference when it comes to ported vs stock cast. The injector should be doing 99% of the atomization. The increased airflow is only beneficial if you're running larger injectors, you want more efficient duty cycle, or you want a different AFR. Ultimately, it has nothing to do with atomization. That's all the injectors. If anything, porting helps reduce knock which is caused by uneven ignition or pre-ignition. Porting creates a more efficient and better burn. But like the video says...it's time consuming.

@thinkerdoit

5 жыл бұрын

Roughness helps atomize fuel in carbureted scenarios. As stated, not so much an issue with fuel injectors.

thanks to all you guys who make these awesome videos, iam learning more and more about engines the more videos i watch, i always wanted to be an engineer all my life but iam traped with my curen job, i love being around cars and knowing how things work, keep up the good work, and always do what you love in life that way working will never feel like your working

@d4a

7 жыл бұрын

Tony Baily I have a job that has nothing to do with cars, but hey it pays for the car hobby :) Would love to make this my job but until then I'll just try to spend as much of my time doing this :) thank you for your support.

7:23 had me laughing so hard. That short radius looked more like a g spot.😂😂😂😂😂

@benjaminsultani3571

3 жыл бұрын

just dont penetrate your chick with 220 grit

@caperformance_motorsports

3 жыл бұрын

@@benjaminsultani3571 remember if you don’t have a condom use serain wrap , a plastic bag, a rubber glove or even a paper bag but never never ever use TIN FOIL ! tin foil will tear you scrotum !!

I caught the quote... Hahah! Thanks man. Nice work! Someday you'll get the troll who picks a fight with you about how you folded your sandpaper. When he arrives, you can tell him to FOAD, too. :P

@d4a

7 жыл бұрын

I woke up like a few hours ago and I saw a comment notification with a KZread icon. I've never seen one of those before. Then I read the contents. Man oh man. I thought long and hard what to reply and how to be really cool, smart and funny, but I got nothing. The fanboy prevailed and this is the result. Whoa! I love your channel man. I watched like 90% of your videos. This video would have never happened without your head porting and polishing video. Thanks for commenting. No, seriously thanks for commenting, I'm so happy you caught the quote, made my day. I'm starting to love the trolls, good laughs with them. Although I still don't get the ones you get (thankfully?), your's are in a league of their own.

@davidparker9676

4 жыл бұрын

Love to see content creators commenting on other's videos. Very cool. I ported heads professionally and really liked the Jafromobile videos on the subject (and humor). Info out there is usually limited due to porters wanting to keep their trade secrets, well... secret. Your videos offered a very good amount of info for what you want to achieve. I'm happy to see new content on your channel and getting updates all these years later.

@tojiroh

4 жыл бұрын

@@davidparker9676 it's great, innit? Both videos are highly enjoyable. The sharing of knowledge brings us together!

This is a very good video, but it would be so much better if you touched a bit on why its so important to polish the exhaust ports(to leave nowhere for any carbon to stick to) and to leave the intake as rough as possible(to help with fuel atomozation, at least for NA engines). Great video though

Looks like a great thing to do never knew this was possible !

I liked your video, really good!! Thorough and quick to the point!!!

Take a long strip of sandpaper and pull it through the port and seat to get the short turn easily round and polished. Especially on small displacement engines where you can not get your finger in the port

Nice brake down. It's good motivation (love you to cc) lol

You can do a lot of that deep fingering with a surrogate finger extension (cloth wrapped round wooden stick/dowel) and or even a built up soft pad wrapped around your rotating shaft...! You need some way of trapping the w&d paper in the right direction, but it helps avoid joint and tendon damage.

7:23 dude is literally finger banging his engine

@d4a

7 жыл бұрын

eksine lol

@Syncopia

5 жыл бұрын

Real engine porn

@GoForGold256

4 жыл бұрын

Could've hit 2 ports at once if he snuck his little finger in... I call that a missed opportunity.

@madfortar2008

4 жыл бұрын

@@GoForGold256 You should get a MBE for that joke 😂

Very nice sir ! you are tallented.I have a honda b16a,I' have some high compr. pistons(11.1) and bigger cams with a 70mm throttle body and ported intake manifold,exhaust etc.Soon, hope this year i will port my head following your video !! I've learn manny things here :) sorry for bad rightining, i'm from romania :)

@d4a

8 жыл бұрын

Thank you! I wish you success with your project, I'm really happy you found the video to be useful.

Great video mate, really enjoy it

Outstanding job on this video.

Great Video! Excited to try it out this winter!

@d4a

7 жыл бұрын

Evan argueta Thanks, glad you like it. Good luck!

Not gonna lie. Can't wait to do a full port job on my ZX2 after practicing on my old Corolla. Thx this series is where I started.

@d4a

7 жыл бұрын

+Jayson Teppes Happy to hear this got you started. Good luck!

Thank you. Very helpful.

If your worried about removing too much material, or have no experience with grinding, buffing and polishing metal in general you can always start with a higher grit and move back to more aggressive till you find what is best. Just make sure you follow back with the higher grits in steps to smooth and prep for your buff and polish. Even though it can take longer, this job is by no means a quick one either way. Also take breaks, the vibration from the tools can mess with your hands and when polishing for long periods of time it can mess with your eyes kind've making you go "blind". Itll help you stay on point and not make any mistakes. I grind, buff and polish mostly stainless steel for work, but alot of diff metals on the side. Fun stuff to do if you have the patients and OCD lol

Its worth remembering that you can cause compression differentials by removing different amounts of material from each combustion space. Do one space first completely and take a volume measurement with thin oil and an accurate measuring cylinder. Use this as a reference for the others. Also consider a regrind of the valve seats to a more efficient flow profile 3angle seats or similar. Nice video this and good luck.

@JosephNoble1984

7 жыл бұрын

I was wondering about that. wouldn't removing even that small amount of material from the combustion chamber lower the compression ratio?

@bpcuaie

7 жыл бұрын

good point. i was thinking the same.

@MHFTime

7 жыл бұрын

Lowering compression is good, when you're talking about anything but allmotor. You can always add more Boost PSI without worrying that your ratio is going to be off. Because Compression does not equal PSI in boost. You can easily get 10+ psi for 1: compression ratio.

@gregfeneis609

6 жыл бұрын

You can start with the valve job nearly finished, shape the combustion chambers, then sink valves as necessary while finishing the valve job in order to achieve chamber volume balance

that was a awesome video!!im going to try porting my 2.3 liter ford boat engine to maybe get sum more power out of it. hopefully a 4 barrel intake also.thanks !!

Excellent video!

A REALLY wonderful job

@d4a

6 жыл бұрын

Thank you :)

will be porting my honda k20a head soon and this helped alot. thanks

@d4a

7 жыл бұрын

Happy to hear it helped. It means the video is doing its purpose.

best video ever

Nice video, mate! I've read that it is better to keep the walls of the intake tract rough to improve the turbulent mixing of fuel and air.

@d4a

7 жыл бұрын

+Michael Lautenschutz It all depends on the engine and application. You do have a point but rough intake to help fuel atomisation is a better idea on carburatted engines rather than fuel injected ones.

@Wittelijss

7 жыл бұрын

driving 4 answers aha! Just like you said there's a method for every application :) My bike has relatively long rubber intake boots from the carbs and a longer intake tract than my Miata. I see the logics.

Good video!

thanks your really helpfull

Nice useful video for DIY stage 1 level, meets my goals for my 1992 track bike engine. No wasted time, listening to long winded hillbilly babel.

Good info muka

Friggin awesome.. I learnt so much.. thank you..

@d4a

8 жыл бұрын

Thank you! Glad it was useful.

Good jobs men,good jobs

great job

When all your shaping is finished on the intake ports, grit blast the surfaces with 120 to 150 grit aluminum oxide for an even surface finish & better fuel/air mixing. Protect the valve seats & guides!

You should always gasket match, especially if porting, as an uneven or rough transition will cause more impedence than the rough spots removed by porting and can cancel most, if not all of the gains achieved by porting.This is not meant as criticism criticism, but rather advice.

NEVER polish the intake unless you have the fuel injected in the head.The intake charge must "tumble" to keep the fuel from turning into drops as there is no power there. I know I forgot somethings but not this after racing for over 40 years and teaching for even more. I went to school in Malvern Pa. and you know who lived there ,I miss the old "grump".

@d4a

7 жыл бұрын

dynodon100 This engine is fuel injected. You are right, no polish for carbs.

@tiernosev

7 жыл бұрын

driving 4 answers Not even 180 grit for carburated engines?

@dynodon100

7 жыл бұрын

NO you want it rough so it will "tumble" , smooth in the intake it will "jell" together.Grind around the runners and remember "No-one ever went faster grinding the floor of a port" I got that on after spending many years racing and learning the "old guys" were right.

@crestsolution7906

6 жыл бұрын

GUys would you pls edify on what happens in Stage 2 and 3? I have been trying to read up on relevant info regarding all this but there simply is too much to understand for my level of knowledge. Basically I m just looking for a direction to follow, to pick up on head porting and exhaust building. What is the general approach one should follow to this technique given how different engines need a different approach. Also once porting is done, are there relative changes that are to be made to the shape of the piston crown, the shape of the valve neck etc I am looking to get started off on single cylinder 4 strokes and need small bits of advice on the best approach to getting down to all this. (Bikes - 150-200 cc engines). Cheers!

@bestleesinna7702

5 жыл бұрын

It doesn't matter if it's direct injection or port injection. Both will be fine with ports. Carbs don't have quite the same pressure. New racing or performance carbs have much better jets than old carbs. So with racing or performance carb, you can port.

7:22 fantastic diy btw

@d4a

7 жыл бұрын

Nathalie Desnoyers You got it :) glad you liked the vid

Also a good video from you :-) See my video of a professionally ported 4A-GE head by TODA in Japan. People thinks, it should shine like crome and have a mirror finish, thats not true. You did a great job :-)

This is a great video! I'm definitely gonna try on my dirt bike. Quick question, what mistakes can a novice make, and how severe can they be?

@d4a

7 жыл бұрын

Satanminherre Thank you, glad you like it. The most common rookie mistake is being too enthusiastic and removing too much, thinking that more is better. Too little won't hurt, but too much can actually disrupt airflow and reduce power, so stay on the conservative side, don't go much beyond removing casting imperfections and blending in sharp edges and you will be fine.

can you suggest a quality electric tool that can accomplish this as well as heavier rotary Porting needs. I tried the Harbor Freight Electric Die Grinder but with no speed control it simply destroys the sanding cone bits.

This is so amazing to watch, I think even I could do something like this. Obviously this will increase power and efficiency due to less restriction and more flow, but will this also improve fuel economy? I am considering rebuilding a diesel 4x4 engine from a Mitsubishi Pajero, would doing this to the ports basically improve any engine?? P.S. I just discovered you and LOVE the way that you explain things, it's so simple and clear. Thank You.

@d4a

2 жыл бұрын

Thank you 😊 The benefits of this on a diesel will be negligible unless you're building something very extreme with massive hp and boost.

nice diy

@d4a

7 жыл бұрын

+Alex Rodriguez Thanks

Great, another project for me to conquer 🤣

Would be important to note that smoother but not polished runner walls is the way to go for port injected systems, that slight roughness helps the air/fuel mixture before entering the cylinder, port injection also keeps the back of the valves and walls cleaner so carbon buildup is less of a problem, direct injected systems would benefit greater from polished walls, less restricted air flow and reduced carbon buildup. Awesome video I subscribed.

Hey so Im not confident on what is best for the bowl. Do you sand the valve seat to blend into the rest of the head? I know you dont touch from the 45 to the combustion chamber, but from just beyond the 45 to the port opening is ok to sand?

Wow thank you, got a book on this but doesn't go into too much detail unfortunately

wow nice video!

@d4a

7 жыл бұрын

+Jeremy Sandidge Thank you

I need a skinny Long bit that u used to sand the inside for the short radius.. where did u get it or where can I find it ? Ty

Very Good job

@d4a

8 жыл бұрын

Thanks!

excited and horrified to attempt this

@d4a

8 жыл бұрын

Don't worry, its not too complicated. Just do the research and go slowly. Don't use carbide burrs. Maybe get a junk head if you can and practice a bit. You'll get the hang of it as you go.

@lordflick895

8 жыл бұрын

driving 4 answers thanks. My hope is to dig something out at Standard Auto Wreakers on their parts day and try my luck. I'm a bit concerned that this process might slightly lower compression but I suppose the better flow compensates.

@d4a

8 жыл бұрын

Lord Flick You can get back the lost compression, and then some, when you cut your head at the machine shop afterwards.

@lordflick895

8 жыл бұрын

+driving 4 answers (mr2 mk1 hero) good to know. thanks!

@ivangadzhanov

5 жыл бұрын

@@lordflick895 you could get back the lost compression by installing a thinner gasket it's what I did, oh yeah and if you do a mirror finish on your intake runners you could get increased fuel consumption... it's what a guy did to my head and it was awful 17l per 100km urban fuel consumption it nearly doubled and smelled really bad...

Thank You Thank You Using your ideas/techniques will save some $$$, but curious, what kind of cfm gains do you think you can gain via your method?

Do you think there are no compression loses when you port the edgeds out of the chamber? Iam not really sure about this.

At 7:22 I realised I was a man who was capable 😄

I have a 75 z1 1000 now was a 900 polished combustion &exhaust but the intake I have been reading needs to be rough or no smooth this has "carbs" can u give any input. thanks man

@d4a

5 жыл бұрын

A little bit of roughness in the intake helps fuel atomization. For a carbureted application I would finish off with 200 or maybe 300 grit maximum.

May I ask why you did no unshrouding?

nice!!!!

Can I do this with my sport bike?

@AxelPLasg

7 жыл бұрын

Yeah, with any combustion engine basically. Even something as old and shitty as MZ150

can I do this to clean the exhaust port of carbon buildup

Great video, great work. learned a lot. Is this a car or bike? Did you notice a difference?

if i dont have a mashine like this,can i use sandpaper like 1000 grit and sand it down?

I like your videos bro But i wouldnt recomment to polish the intakeside on this engine The rough surface is to get a better fuel/air mixture

@Bramon83

5 жыл бұрын

I second and third that. Contour only. Unless it's a direct injection engine then honestly.... Polish away.

would putting duct tape over the valve seats protect it a bit when doing valve bowls?

The best part of this video at 7:30 😂

What were the end results? Did you dyno before and after?

@alexhu765

7 жыл бұрын

hasbeengood that's exactly what I would like to know too?

@brain288

6 жыл бұрын

It's not all for hp and tq gains

Damnit man now I have to do it to my car And maybe the mower too!

@d4a

4 жыл бұрын

Definitely gotta do it to the mower :)

@JarredRandom

4 жыл бұрын

@@d4a wouldn't be the first time i modded a mower I put a 20mm mikuni carb and a header on one of my old push mowers lol the neighbors hated me after that

@d4a

4 жыл бұрын

That's hilarious mate :)

You did a excellent job with 4age big port cylinder head... buddy. Now, take the cylinder head and go to the engineers. Find out how much more more bigger value can they install on the 4age big port cylinder head.. Your next video, please do a video of, how to port the exhuast manifold for 4age big port cylinder head. Do a video of how protect it, on 4age manifold against heat by galvanize coat it.. from high heat..

will this work on carbeurator engine. i have a 100cc hero honda splendor from india. got interested to port after seeing ur video. will this effect my mileage. also would like to know if i hv to port my cylinder with this or not needed.

The way you changed the combustion chambers, doesn't reduse the compression ratio? That way you make a bigger "bowl" for the same amount of air/fuel mixture so the comp ratio is smaller! Have you run on the dyno before and after the modification to see any diffs?

Da li bi mogao da izguram moj bmw m43tu sa 118ks na nekih 150 ako spustim glavu za recimo 0.5mm obradim izduvne kanale olaksam svaki klip oko 10% naravno nove karike gumice ventila itd itd zanima me iz razloga sto sa cipom taj motor bez modifikacija daje 130ks pa sam zeleo da te pitam da li bi takve modifikacije uz cip izvukle jos 20ks hvala

The most important trick with a head,is that you can level it all out 1 or 2mm in a professional workshop and the explosion in the piston chamber will be better and it will gain some hp

@abduljabbarghani161

4 жыл бұрын

How much hp

So polish is not by some metal polish material? i am confused. What exactly is polish ? with fine tools or some solution?

Have you tested the head or have before and after dyno sheets?I'm very curious to see the difference.

@d4a

5 жыл бұрын

Haven't tested the engine stock as it was impossible to test due to failed transmission and various other issues. Right now engine is heavily modified with different compression, cams and converted to bike carbs, so when I dyno it I will have no idea how much the porting and polishing actually impacted power. :( I was really curious myself too

curious about the valve diameter to throat ratio on DOHC cylinder heads

How did the engine preform in the end?

Does this little thing really increase hp and torque ?

bro you gave that head a good fingering! But did it help? What if you left the cam alone and only ported the head? Would you see a power improvement?

Awesome job ...can you give us some links for the tools?

lots of comments re @7:22 but what else you gonna do when you can't get your tool in there?

Ppl Before porting a head learn what’s low and high rpm port, you can then decide on what you want in your application low or high rpm power or a trade off and go for mid range,, make what you want of it .maybe I have been wrong for the last 50 years of porting ,just remember there is no turning back with out big expense MMkS,RACE,ENGINE,DEVELOPMENT,

perfect

A question: The grinding paper on that shaft that u use - for example @2:03 - what is this? I didnt saw that before. Is it self made with sandpaper?

@d4a

7 жыл бұрын

PerryRhodan5000 Those are porting rolls. You can buy them at a lot of places, they exist in different grits. I bought mine online from a company called brightworks, and was very happy with them.

@PerryRhodan5000

7 жыл бұрын

Hello, thank you for that answer. I've looked in the inet. In Germany you find that not often. But its a good tool. I wanna use that too in future. Thank you.

I’m a terrible slow reader love the video hate the reading lol

dont you decrease the compression ration by porting the cyl head between the valves/sparkplug area? Wont that potentialy decrease power on an NA engine?

@d4a

7 жыл бұрын

Jarno vw Yes, porting the chambers decreases compression, but you increase it easily by cutting the head and block and/or with a thinner head gasket.

@J4rn0

7 жыл бұрын

driving 4 answers ah right. though what first comes to mind then is... why would you increase the volume of the total cyl area and the shorten it again by shaving the head and using a thinner gasket? PS this is not meant as critisism im genuinly curious ;)

@d4a

7 жыл бұрын

+Jarno vw When working on the chambers, it's actually called deshrouding the chambers, the goal is the get rid of sharp edges, i.e. potential hotspots that can cause knock. You want the chambers smooth to help prevent knock. The increase in chamber volume is just a sort of unfortunate by-product. The increase in chamber volume that occurs as a result of porting isn't that big and shaving the head even a little, easily makes up for it. You don't have to explain your comment, I will reply to criticism and curiosity equally happily :) Thanks for watching.

@J4rn0

7 жыл бұрын

driving 4 answers thanks for explaining i see i missunderstood the goal of it :D

@Powerslider

7 жыл бұрын

I'm afraid my valves will hit the pistons if I cut the head. Wouldn't that concern you as well?

Once you have given your cylinder heads a nice polish like that, what does it take to restore that finish the next time you need to pull the heads off? Do you have to do it all over again starting with the roughest rolls? Would wiping the insides be good enough?

@vincevegacustoms8860

7 жыл бұрын

AJFresh carb cleaner will remove any carbon deposits since its smoother,will be easier to clean...dont forget to tune the ecu,this leans your mixture...

@AJFresh69

7 жыл бұрын

Vega-Expert thank you. where can I get more information on tuning the ECU after a port mod? I suppose I'll start right now by looking up ECU tuning.

how much hp did you gain with all of this? I was told that a port and polish has very little benefit on these rb heads.

@d4a

7 жыл бұрын

This is a head from a 4age. Porting actually can gain 15-20 hp when done right on these heads. I have not dyoned this engine unfortunately, it developed rod knock before I managed to do that. Thanks for watching.

how do you get the chambers to be the same cc in the end

@d4a

4 жыл бұрын

Grind, measure, grind, measure, grind, measure until they're all the same. Be careful not to grind too much though. I have a really old combustion chamber measurement video somewhere.

Got a question might sound dumb but what should I do with an extra 4age engine that has a knock in it? Not much of an engine mechanic and never opened one but thought about using it to learn

@d4a

6 жыл бұрын

Not dumb at all. An extra 4age or any engine for that matter is a great learning opportunity. I had an awesome time putting my 4age back together and I picked up knowledge and skills while doing it that I would never have picked up otherwise. Real hands on tangible experience is second to nothing, plus it's really really fun. If you want to dive into engine mechanics here's what I would do: 1. Get a copy of the aw11 (first gen Toyota MR2) BGB, big green book, aka the factory service manual. It has absolutely everything in it that you need to know about that engine. If you're 4age is from another car find that car's BGB. 2. Get an engine stand (you can get a nice one for like 100$ or so I think). 3. Take the engine apart step by step at your own pace. Pack the parts you remove and their corresponding bolts into individual bags and label them. 4. Once you take everything apart and have the bare block, cylinder head, crankshaft, rods and pistons take it to a reputable machine shop along with all the measures and clearances from the BGB. Have the rods resized, bore the block over, get oversize pistons, have the crankshaft turned if needed. 5. Buy an engine overhaul gasket kit from Toyota (part number is 04111-16072 if your 4age is from an aw11. If your 4age is from another car use www.toyodiy.com/parts/ to find out all the part numbers you might need. 6. Buy new main and rod bearings according to BGB specs and what your machine shop guy tells you. Clean all the parts you removed, if you want it looking fancy have them blasted/galvanized/powder coated or whatever else you're into. 7. Watch this video to get yourself motivated: kzread.info/dash/bejne/gKtmt6ynntTZabw.html 8. Put it all back together. 9. Find a car to put your new awesome engine back into. 10 fire it up and drive it and have the biggest smile on your face ever knowing that you're driving a car whose awesome little rev-happy engine you put together with your own two hands

@marvinmartian2630

6 жыл бұрын

Ok I'll make sure I keep these steps in mind, I have two aw11s in a shop one is crashed but has everything working on it so I'm going to get it fixed and the other has another engine in it they will be awesome projects and I would love to turn that extra broken engine into a turbo one, but all in all thanks a lot for the information really helps a lot cause I was just too lost, I'll keep following you to get ideas from your project good luck on it man it's looking real good 👍

Do you know how much you can gain from porting like this? I have 272° cams and small port Pistons with .8mm head gasket. I did remove just the casting marks around the valves but none in the intake, exhaust or combustion chamber

@d4a

8 жыл бұрын

It really depends on the port job. If not done right you could even lose power. On the 4age bigport gasket matching on the intake side for example can lead to a slight power loss as the intake ports are huge already. I have seen builds where the port job alone and a compression increase with smallport pistons and a thinner head gasket resulted in a dyno of 120 whp, which is a significant increase. But increased airflow and higher compression go hand in hand with uprated cams and a port job will be even more beneficial when combined with these. If what you did on your head is align the seats and bowls thats probably the single most important thing to do on the 4age and thats where most of the power gains come from on the port job. Those are some mean cams, how high are you revving? Megasquirt I assume?

@NickPahls

8 жыл бұрын

Ok awesome! Right now I have the redline set at 8500, running Megasquirt ECU 272° cams and uprated springs. I didn't do any porting inside the runners just around were the cams are to take the rough edges off the casting marks. I'm planning on doing a mild port like you did when I get my blacktop Pistons.

So for a carbureted engine, even if its running on racing carbs with pump squirts, its better to not polish the intake, ita ok to port the intake but not polish ? Or not even touch it ?

@d4a

5 жыл бұрын

You can port it, but leave it rougher, i.e. don't polish as you guessed correctly

@youssefr7968

5 жыл бұрын

@@d4a thanks for the quick reply man !

How many horsepowers you get from this porting?