I'm really stoked for the polyquad video!

@NotSure723

Ай бұрын

Me too!

@joeinmi8671

Ай бұрын

X3 I have a 4200 i6 ready to try it on.

@michaelblacktree

Ай бұрын

I'd like to try it on my BMW M54 L6.

Can't wait to see the "how-to" on the IOP program.

I’m glad to see DV is keeping up with the times.

I’ve always liked how DV uses the same style on screen as he does in his books.

@randywl8925

Ай бұрын

Yes, very clear visuals.

Thank you David! Great information as usual Sir.👍🏻

Im shocked at the bowl work they look impressive too. Nice work DV

Thank you for sharing all your wisdom DV.

Great vidja David, Andy and everyone else 🤙🏼awwwooo

That shear wall is fascinating to me. I might try that detail on some iron Chrysler heads. Thanks for the great ideas!

Thank you David, looks like you are back in the grove again, I can’t wait for the next video so keep them coming.

@KZ-se4ik

Ай бұрын

+1 to this

Sweet results from small changes. A pleasure to see.

Looking forward to the tf280 bbc video as well as how tight is considered tight quench video..👍🏻

I'm cooking more popcorn... so, keep it coming! Well done. Thank you.

Great information as usual DV Can you please do this on the small bore ls enforcer heads to see how well they gain please. Not everyone has a 4" plus bore

@DavidVizard

Ай бұрын

Yes that is planned for a future video.

I hop you and or Lake Speed do a video....... Two masters combining data.

Can't wait for the poly .

Awesome job DV

Thanks for all of your hard work!

This some good stuff!

New sub. I've read a few of your books back in the day and just stumbled on your KZread channel. ❤

Nice! I'm still patiently waiting on the cam recommendations. You mentioned new constants for the LS heads a few episodes ago. I'll patiently wait for those. My best guess, using your information, for a heavy 3/4T 4x4 truck, using these heads as they have been modified, is a 270/274(seat duration), 110 LCA, 106 ICL, 600ish lift. I'm thinking of keeping the exhaust as easy up and down as possible. Should end with a 52* overlap. A little hotter for a truck than may be necessary, but would still be tons of fun. Proper engine and trans tuning, she should be a beast on the street, and get me and my dirt car to the track in no time. I do have a feeling you'd recommend something a touch smaller, say 260/264 (seat duration) at 108+4 though. We shall see. My truck has the LS3 head on it now (L96 engine), but will receive the AFR transplant soon.

Wow, I did this little swirl once and sold the head to someone, he then ground it mentioning there was something od in my porting... I hope it's what I think, it means I had good intuition.

thanks

Do you have similar guidance for 4 valve heads?

Computational Fluid Dynamics is pretty sophisticated. Can near-state of the art CFD help show where to modify ports such that things like cfm, velocity profiles, port energy, port energy can be reliably calculated? Surely F1 and the OEMs do this.

@bcbloc02

Ай бұрын

I don’t know it’s real easy to have cfd not match reality. I bought a turbine housing that was supposedly cfd designed for peak performance. It was absolute trash. I don’t know what conditions they modeled it with but they clearly were wrong as the stock design beat their optimized one by 10%. I have since done a bunch of grinding and welding on it and look forward to testing it again to see if my experience can’t get it 10% better the other way.

Thanks DV! v/r wh

How do you know when a fuel ramp is appropriate?

@DavidVizard

Ай бұрын

Any time the fuel droplets are suspected to be too big. This often shows in the combustion chamber coloration.

Dave sound natural at 2x speed.

Thank you! Very very informative. I would love to use the IOP program in the future but before getting started I find it hard to setup the needed measuring devices for airflow and airspeed. Any one who has a basic setup that can be recommended? Best wishes - Peter - Denmark

Exelent video again! It is so informative when you give real tips where to port and how. Thank you again! I have seen lot of your videos and as Marine chief engineer I know litlle bit of engines, I many times understand that what you are talking about is correct. There is so much BS out there in internet. Friend of mine is coming to holidays from Boston bringing me bounch of our books to Finnland. I looked at your video about porting Turbo charger, I couldn´t find part 2 of this video from KZread? Was it ever done or I just cannot find it? With best regards: Hannu Hakkarainen

@NotSure723

Ай бұрын

It hasn't been released yet. He's a busy man.

@hannuhakkarainen5029

29 күн бұрын

@@NotSure723 Okay, I was little bit worried if its just my who is not finding it. Thank you for your answer, I´ll be waiting for. So many irons in the forge!

👍

it seems that the air is flowing to the wall.? why? to replace the burn gases fron one side . maybe direct to much flow to wall can wash the oil from these

It's weird that they put the swirl ramp on the wrong side and killed swirl. How do they run in a car?

David for over 10yrs i wanted to see a shoot out between youself and smokey yunick what i mean is ports done the way he describes in his book vs the way you do it ,why your way is better and why his approach was defficent. He said the last 1/2 inch before the seat should be perfectly straight up to first seat angle so the air hit the back ofthe valve straight on ,this question has been nagging me since the last husband i had. So if u could take up.this challenge i and others would be very grateful thanks tell stan hi for me i am betty goad

@JeffKopis

Ай бұрын

My kinda woman ❤️

@V8Lenny

Ай бұрын

Forget everything Smokey wrote.

@bcbloc02

Ай бұрын

I would think a big problem to that Smokey approach would be very few heads are cast that could accommodate an inch of straight before the seat. Those would be far taller heads than one typically sees.

With boost do you need to worry about velocity or just size of port since air is pressurized.I would think same port job just bigger so more air can come in

@V8Lenny

Ай бұрын

Same size port. Every engine is boosted with at least 1 atmospheric.

@NotSure723

Ай бұрын

The velocity doesn't change much. Mainly it's the _density_ that changes.

quench bands that is something i want to see

David have you ever thought about 3D printing copies of your port mold and selling them i bet the would sell like crazy

@flinch622

Ай бұрын

Better than that... the how to on port molding is in another vid. Its a nice way of cataloguing mod history when experimenting and alot easier to reference vs pulling heads and remapping details if notes get lost. Cheers.

Break channel

Please do not color the port molds pink 🤣

@cgarris8674

Ай бұрын

Port Gender Reveal! 😂