These are the videos I like! Head to head comparisons on dirt cheap parts, something anyone could change in a couple minutes.

@b.c4066

2 жыл бұрын

Trouble is each engine is different, and these vids can help get in the ballpark, but to maximize YOUR COMBO, you'd have to test it, and without back to back drag strip runs or a chassis Dyno you can easily cost yourself power. What I'm saying is you can't get their results and have it be optimized unless you do the same tuning/testing. Go out and buy a carb spacer thinking it's going to add 10 hp, and in your combo it could cost you 14 hp until you optimize your engines air fuel ratio, timing, etc. And keep in mind these are wot tests with very low coolant temps that are precisely controlled. In your car at operating temp with full exhaust, stock stall converter etc it will most likely behave very different due to the way the engine is loaded on the Dyno vs your car/truck. So don't rush out and buy a four hole spacer thinking you'll gain power and acceleration. The difference between a good engine and a GREAT ENGINE.. is this kind of testing, gathering data, and optimizing the car.

@heathermiller2917

2 жыл бұрын

@@b.c4066 so good to see someone say exactly what i say! Lol! Ive been at the track and heard the argument that “this spacer added 20hp for my 440, it’ll add 20hp toy your 5.0” I’m like “ummm, that’s necessarily true…”. And the fight is on!

@b.c4066

2 жыл бұрын

@@heathermiller2917 spent years reading forums, where guys are asking what timing, what jetting. Blah blah blah, put in the work, pay for Dyno time, gather data, learn to read plugs and they'd realize how absurd it is to ask for info like that, even if building a damn near identical engine, sure you can offer a ballpark suggestion, but ultimately THEIR combo will want what it wants. It amazes me that kind of mentality is still alive in this day and age.

I love that the magnum is getting some love, and wow, the afr is crazy interesting!

@tonyovermyer5368

2 жыл бұрын

I'm not even a dodge guy but I do too! Gives some options for guys who want to do something other than an LS in a classic Mopar without spending lots of money

@The4x4manonbroke

2 жыл бұрын

Yeah I have a Durango and been looking into building a new 5.9 magn

I’m eating up these magnum videos. Building a drag week truck and planning to stick with the magnum that came with it. Not a ton of stuff out there so loving all the attention you’re currently giving it 😁👍🏻

The best engine videos on KZread period!! Loving the mopar content!

Interesting but one big data point missing. Results w/No spacer! I heard the part that the carb wouldn't fit without one, but it would have really interesting to see if it would have fell between the two in terms of power or who knows, maybe it would of had the best power of all.

From personal experience, I went from an RPM intake to a Victor Jr on a 400 HP 383. 9.8:1 compression, 236/242 hyd roller, Victor heads. The loss of low end torque was noticeable. On a suggestion, I tried a 1 inch 4 hole spacer to get some low end torque back. It did help, but should have left the RPM intake for what I was doing. The four hole spacer helped with carb signal.

Man you are the best with this video i ran an open spacer on my 302. I will take your advice because down low is where i want my power. Thank you for doing this test

Great video I actually figured out some of the problems that I might be having from a carb spacer thanks Richard 👍

Thanks Richard for the Mopar videos, 5.9 magnum, and 440. All the Mopar folks are very happy I'm sure! We gotta get you a 440 to Big Bang! LETS MAKE SOME NOISE!

This whole series is great. I keep going back to the tuning myths we had 45-50 years ago, and now it makes much more sense why some things worked and many didn't. Keep up the good work. PS: If we only would have had the heads back then that are available now........

Love the Mopar content!

Would liked to have seen a two hole spacer. Basically an open hole with a divider to keep the dual plane intake properties but with more plenum volume.

Yes! This is what I have always wanted good data on!

Good stuff! I have always preferred 4 hole spacers, but never really tested it.

Thanks I’m going to order a 4 hole for my 347 with 750dp and air gap. Cool video. Simple and effective.

It would be interesting to see if re-jetting the carb (with the open spacer) would regain some of that lost power.

@craigbenz4835

2 жыл бұрын

My thought exactly.

i appreciate your videos . Thanks for all you do

I'm not surprised about the jump in power from where you had the timing set, and shifting it to where I said. I didn't even have to get out of my chair.

Neat comparison on JUST a one inch carb spacer. Significant difference.

Thanks to your video I chose the 4 hole over the open spacer!

A really interesting test!

Recently I have built my sbc [40 over 4 bolt 350 with custom grind 488/488 roller conv cam,906 heads and a holley 750dp sitting on edelbrock air gap] and I had installed a 1 inch open spacer. I soon realized there was a noticeable negative power difference and after watching this I have a 1" 4 hole spacer and 1/4" phenolic spacer on the way. I hope to see improvements...

Fantastic video and education. Thanks!

I love that the old Dodge engines are getting some attention, thanks Richard! Have you ever done an intake test of Vintage intakes? Like the old Eddy Tarantula manifolds?

You’re the man! Keep it up.

Thank you for showing the timing deal so that guy could 👀

Really good info here! I’m wondering if there’s a fuel distribution issue with that M1 manifold. Individual EGTs or 8 O2 sensors might show the engine likes an overall rich mixture because of a few lean cylinders. Just a guess… Bottom line is dual plane manifolds work best for every day street use. Don’t mess it up with an open spacer unless you’ve got a whole different usage in mind. Thanks again Richard!

Kool vid. I'd like to see that same test on a single plane manifold.

Every engine is different. I put a 1 inch open spacer on a basically stock 383 roadrunner engine with a Holley vacuum secondary 780 carburetor and gave a tremendous seat of the pants boost!

Great video

Just out of curiousity, it would have been nice to see what the AF ratio was with carb to intake before the 4hole and open hole spacer was added.... either way, i see there will be a slight leaner mixture because of the simulated added intake plenum that the spacer provides, allowing more air without a change in fuel delivery.

very informative, thanks!

Please do more magnum test love it

I really would like to know what applications the headers were designed for. Reason being is that it would have been much easier to build the header shown if the destinations on the collector had been swapped for the front and rear positions on the mounting flange.

Thanks for this video. I don't have a dyno,so i use throttle resonse by ear and feel. I was going to buy a super sucker 4 hole off ebay,but im just going to stay with my 4 hole Mr. Gasket Aluminum outside plastic 4 hole insert. I'd love to see a 4hole stacked on top of the open just for giggles.

Thank You, Richard for the Magnum Series!. Too bad the M1 dual-plane intake had such a limited production run. They were around $300 each back in 2006. The water heated intake makes for good driving in cold weather- some vehicles are more fun when the snow starts flying. When these M1 dual -planes sells used for 2X what they cost new here is definitely interest. A Edelbrock Performer or Performer RPM for Magnum would be easy-borrow from the Magnum AirGap the intake to head section to bolt to the Magnum heads. The 5.9 Magnum had a production run of almost 20 years, millions made, going to scrap. All for the want of a bolt-on Performer, Action Plus, or Contender intake. Glad to see the Magnum get some attention. Go make some Magnum noise!!

@blueduster74

Жыл бұрын

Love mine on my Ramcharger. Thing runs so good I’m hesitant to put efi on it.

@dantupper1784

Жыл бұрын

@@blueduster74 Another year later.... No Change on the manifolds. Ma Mopar's last two owner groups come from non-hot rodding cultures. Ramcharger's are always fun.

Richard , I had the opposite results from a sbc 350. The 4 hole on my stock silverado gen 1 motor and a boat anchor cast iron intake. And it lost a BUNCH of everystuff...then the open one I really couldn't tell the difference in that and no spacer.

Great video and info, it a four hole spacer for me. If you can, I have a question, I’m thinking to put 2v closed chamber heads on a standard 351 Cleveland to increase compression, no other changes, am I going to run into tuning issues or maybe other issues you may know of.

Right on

Always great!!!

Good video. You tested throttle body spacers? Would like to mention, I reference your videos when it comes to building engines, it makes it easy to justify to the wife why I am getting the parts I am. Your testing helps pick the right setup to reach the goals.

@richardholdener1727

2 жыл бұрын

SHOULD I GIVE HER A SHOUT OUT-WILL IT HELP YOUR PARTS BUDGET?

great and informative content as always 🤘 However, please try to work on focus fluctuation when you film the computer screen, gets dizzy after watching the graphs closely :) thanks in advance ;)

Surprising. Great knowledge and numbers don't lie.. open spacers have been a gimmick for years

I use a spacer under my sniper 2 reasons. 1 to help keep sniper throttle body cooler, 2 to increase plenum length, with the holley sniper it needs to be 4 hole it whistles with open spacer

Thank you!

4 hole beats an open design, WITH THAT PARTICULAR carb and intake. I would like to see the results when using an AFB or AVS in the 750cfm range. My 30 over 9.0 to 1 360 with a MP 450/455 cam and now Edelbrock spread bore dual plane instead of an M1, consistently made 8 hp and 14 lb ft more with an open spacer, than just sitting on the manifold. It made an average of 6 more hp with the 4 hole but only 5 lb ft, (that had to be mildly machined to accept the secondaries), over just the carb on manifold. Timing was using an MSD set at 34* at 2800, no vac adv. I will say this. The AFB did need some jetting and rod tuning because out of the box, it was lean down low, but way rich WOT. The AVS was better at low and mid range, but still rich WOT. Anyways enjoy your vids!!

I love the intro music

i feel like running them stacked with the four hole spacer on top of the open spacer would be good

I bought phenolic resin blanks for making adapters, spacers, and heat barriers for all sorts of stuff. Its cheap to find and make a nice piece.

@madmod

2 жыл бұрын

-Side note. You are such a hype man. Got me "wooooooooooo'ing" for a Dodge Magnum lol

Whats up Ricky, i know this is old but thought id rewatch these on the Dodge Magnums because im going to add some HP to one in my retired work Truck, i plan to port match and some bowl work, blend the valve guides because im too cheap to buy decent heads. I appreciate the data you provide. Hey ive adked before but forgot what you said, do you tune? Hahaha

Would it be possible to put the part numbers in the description so we can source them if we want

can you please test the difrence in power after adding total seal piston rings in a na ls?

Flip those pistons!

That was interesting!

The torque curve on these engines makes you run them at part throttle to keep the revs down in the power range. I noticed it dropped 100 ft lbs above 4K rpms.

👍💪 Good work!

It would be nice to see you repeat the test, with an open plenum manifold.

I have always run 32-35 total in all my LA's Why the pulsing on the videos of the grafs ? I will be starting a 416 build in a few months as the kit has arrived .

Have you tested a tapered spacer. If not I would love to see the results.

i would like to see a tapered spacer test.

I would love to see a 4.0 mustang engine 05 and up and or 4.0 ranger. Run it till it pops. Can it hang with the 4.3 gm? Or can it run away?

Richard this thing needs more cow bell !

Richard. Would you use a open spacer with a singlepplane.

Interesting.. what if you put bigger jets on the open spacer? Maybe more power on the top end? Now I’m wandering if freiberger was using a rich carb for his test and that’s why he showed more power with his test… using a open spacer and milling his intake.

Yes they do

Carb linkage plate with 4 holes, instead of open plate, might show a measurable gain...

Isn't the M1 dual plane a pretty small intake?. I bet an RPM airgap might show a jump in power by itself

Open spacer? Carb to open spacer then open spacer to 4 hole (4 hole to open then back to 4 hole). Turbulence possibly? I always thought that the open spacers worked best with single plane intakes but I could be wrong. Note the torque curve: Max torque is exactly where you need it in a pick-em-up or heavy van that might be pulling a load. Possible that the MoPar engineers designed it that way for a reason? I had a 98 Ram 1500, 5.2, 5 speed, 3.23 gears and it would pull an all steel car hauler with a Duster on it just fine in 4th gear. Cruise at 65 all day with cruise set.

Should have tried a HVH spacer (tapered one) great video tho

This question is a bit off but .... ZL1 Lid spacer for a Eaton 1.9, I have the convertible so fitting would be close does this increase volume enough to make a difference? Then there are spray connections....hmmmm

Try recurving timing and blocking heat cross over

Why 1/2? Do you think there would be any advantage if you had hood clearance for a 1 inch, or 2 inch, what point would be negative return?

I had an issue with fuel boiling off in the bowl after shutdown. A spacer helped with that.

Why did you not Retune the Carb for the Open Spacer to match the FA Ratio Power would have been closer if you did? its good to know that will happen but we need to see the Open Spacer Power after retune of the carb for it, if it makes it act like a single plane up top it would be beneficial to the power band of the Duel plane for those who want the best of both worlds!

@1967davethewave

2 жыл бұрын

It should have made the most power with the leaner A/F ratio. But it was leaner because it had a weaker signal. Richening it up with the open spacer would have made even less power.

@kennethpowers8995

2 жыл бұрын

@@1967davethewave Exactly right. Fattening up the AFR might pick up a little torque, but you would lose power.

@nerradnosnhoj5122

2 жыл бұрын

@@1967davethewave not necessarily, I seen too lean low rpm get rich and make 35 lbft of torque 2700 - 3700, this happened when using a spread bore carb and adding an air cleaner with a short spacer between base and top of carb

@erikturner5073

2 жыл бұрын

Open space on a dual plane defeats the purpose of a dual plane. You just compromise the purpose of the dual plane in using the open spacer.

@nerradnosnhoj5122

2 жыл бұрын

@@erikturner5073 shallow spacer has benefits , can help idle circuit with some carburetors, there can also be benefits of a spacer between carb and filter base ,

How is the tapered carburetor spacer do?

I'm curious if the open spacer would do better with a more agressive cam shaft

@jeffjohnon4223

2 жыл бұрын

No, 4-hole or directly on the intake. Radical cams with lots of overlap love the extra carb signal, especially if you have a carb with annular boosters, they can be worth close to 100 ft/lbs down low.

I Ran two different Black 4 hole spacers, but Both Cracked, I now run a 1" Aluminum 4 hole spacer.

Something I don't think you have: a comparison in powerband between big cam/stock heads, mild/mild, stock cam/big heads, all making around the same power. Is the powerband better at the same power level with the big heads/stock(ish) cam?

@richardholdener1727

2 жыл бұрын

BIG HEAD MILD CAM IS LS

What this test shows me, which I suspected from the start, is that if you change your intake manifold, spacers or otherwise adjust the signal to your carburetor, you have to tune your carburetor. After the swap to open spacer, tune your carb to work properly with that setup and run the test again. Then I'll say you changed the carb settings and that caused the difference, lol.

@zandemen

Жыл бұрын

BTW I'm about to flash up a fresh rebuilt 383 and tuned my edelbrock a little rich on the single plane intake, so your video is making me think that was a good choice in calibration of the jets and rods.

What about anti reversion / shear plates though?

Would the same apply to fuel injection , I have keg intake with aem open spacer ?

Good comparison. I would have liked to see the results of more timing like 36 degrees. Just out of curiosity.

@richardholdener1727

2 жыл бұрын

IT DOES NOT LIKE THAT

...and what is about this dual Edelbrock spacer which is waiting for installation of my chevy performer manifold 😧

why did you not fatten the carb up for the open spacer ??

Just a couple days ago I posted a vid about putting a four hole phenolic spacer on my friends 76 D100 318 with the stock cam advanced 4 degrees, an Edelbrock SP2P low RPM torque intake for heavy vehicles and a Qjet. The four hole spacer severely outperformed the open 1/4 inch gasket we had before hand. Without the four hole it would only leave about a foot of rubber and slowly accelerate away but with the 4 hole installed it leaves several feet of rubber and accelerates much more aggressively.

@jrdmotorsports9718

2 жыл бұрын

That's what they do. More signal at the carb, better it pulls fuel=more torque.

@Impactjunky

2 жыл бұрын

@@jrdmotorsports9718 They also split the carb in half only letting each individual cylinder see half the CFM it would see.This can be good or bad depending on the specific application. I tried a 4 hole spacer on my solid lift 235 HP 273 thinking I'd gain some much needed torque to get through the low RPM bog of my 2.76 gears and it did help a little bit down low, but it hurt so bad up top that I swapped back to open after one drive. Funny how some engines completely defy your expectations.

@jrdmotorsports9718

2 жыл бұрын

@@Impactjunky It's ALL application specific. They are tuning aids. The magic isn't from the spacer, but what the spacer is doing for the combination, and how it is affecting the manifold. Put a 1" open on the manifold, and put the 1" 4 hole on top of it. Watch what happens.

@Impactjunky

2 жыл бұрын

@@jrdmotorsports9718 I've heard a 4 hole on top of an open spacer makes really good power, seems like we may have been reading the same article or at least a similar one. I wish I still had that little 273 around to experiment with but I tossed it out for a cammed, carb swapped 6000 RPM 5.9 Magnum years ago. Getting ready to see if the Magnum likes a 4 hole tapered spacer as a compromise for a 4 hole on top of an open because my velocity stack/air cleaner combo doesn't offer me any extra hood clearance.

@jrdmotorsports9718

2 жыл бұрын

@@Impactjunky It's not from any article bud, 35 years in the business, and have tested my fair share... on the dyno, and on the track. Back when HVHs weren't even around I used to make my own spacers, and combined different styles. I know what they do and why. In your application, feeling it lose top end says it needs plenum volume, hence why the open works. Putting a 4 hole on that will help bottom end without sacrificing top end. The reason why you lost top end with just a 4 hole, is due to the plenum volume being too small. All they do is help tune a manifold.

Can't wait for kegger intake mods. Is reducing the plenum volume in the keg bennificial?

@davej3487

2 жыл бұрын

UTAwesome performances has done some of this. They have a 'Tech' page.

@kelseyschoenbaum4681

2 жыл бұрын

@@davej3487 yeah been there, read all about it, bought a set a while back. I know Marty has put a ton of research into them but i'm wanting to see Richard test them.

Thank you for this! I usually use phenolic or resin spacers and fuel return system on carbs to try and keep the carb and fuel temps low. We all know that carbs hate modern fuel and the cooler we can keep them the better the engine will start.

@richard Semi related: have you tested the differences between open and 4 hole spacers on a single plane intake? Does the 4 hole spacer help or hinder signal to the carb base in this situation? Asking for a fiend.

@richardholdener1727

2 жыл бұрын

spacers are for fibe tuning your combo-the gains change with combo-not just intake (single vs dual)

2" spacer next?

I don't even like carbs but I can't keep from watching every video

The 4 hole is clearly better for a dual plane intake. For a mild street engine. Though in the past I have seen the dividing wall milled down 1/2" reputedly for improvement ay higher rpm. This on both factory and pro built engines. Holdens and Clevos Also those spacers are 1",, not half inch I have dabbled with spacers on open plenum on Chevs. Base Victor Jnr with modded fueliie heads the 1" spacer helped and the 2" was better Ditto on a Bowtie version on Dart 2 heads and again on a 2925 on Edelbrock Victor 23 deg heads. Edelbrock ofcourse make these intakes short enough to go under most bonnets. In my case the carb [ with 3" airfilter] was living inside the reverse bonnet scoop

You seem to be the expert on Induction. Please tell me if you can use a Carburetor setup with Fuel injection? Will the fuel injection take away lean spots in a carb system? Working via the Co2 sensors????

@richardholdener1727

Жыл бұрын

YOU CAN RUN BOTH

I turbo looked thru the turbo video turbo uploads turbo I wasn't looking for turbo related turbo videos but there are a couple turbo vids.

Mr. Holdener, what would happen if you put a 4 hole spacer on top of a single plane intake?? Would it increase signal to the carb?

@richardholdener1727

2 жыл бұрын

IT MIGHT

Wanna see same video, but on a SBC or BBC

Only reason I have a spacer is so I can clear the egr on the factory intake with a Holley.

but how did the engine do without the spacer?

I like that your showing what happens to the air/fuel ratio. Very interesting to me.

Richard, with a self learning TBI kit on instead of a carb, would the different spacers make a difference???

@richardholdener1727

2 жыл бұрын

have not tested

Cool. Exactly why I never use open spacers, don't like them. As to lean n rich? Me old school and I just don't do a high smooth idle adjustment with a 50 rpm lean drop and happy engine, happy carb.