Dual Plane Intake Manifold Dyno Test

Dyno comparison of three different intake manifolds.

[@Pegleg302]

Every time I think about 'upgrading' my Performer RPM, I see another reason not to. Looking forward to seeing how the mods work out , thanks for a great video!

[@larryw5429]

Never would of believed the performer would of beat the air gap afr!!

[@TomSmith-cv8hk]

Wait for the retest.

[@v8packard]

The Edelbrock has a true split plenum, so it acts 100 % like a dual plane, can use a bigger carb, and cylinders don't cross-communicate like a single plane or a dual plane with a cut down divider.

[@supersportimpalass]

@@v8packard He used an open spacer so your theory isn’t correct.

[@1961Bullet]

@@supersportimpalass after he finishes the edelbrock mods, we’ll know better. Too bad it didn’t fit without the spacer.

[@1961Bullet]

@@v8packard I’m running a 600 CFM now, thinking about the 800 AVS2 on a BBF.

[@JSki-kb8vf]

The McFarland torklink was once considered the hot setup for 2bbl 9:1 compression circle track motors...but none of us used dynos back then...

[@Patrick-xd8jv]

That’s what I remember also. I though it was used a lot on the 2bbl class

[@gordocarbo]

@@Patrick-xd8jv Id be curious to hear feedback from guys running them back in the day. Kick ass looking piece. Id run one just cause its different...polished up nice conversation piece at cruise night. Dont think intakes make that much difference unless a real poor one was used in the first place. Used to hear Joe Sherman preach about that often.

[@gordocarbo]

Dynos dont tell everything esp on a circle track car. I like the intake no matter the dyno results.

[@ragingbull3406]

I'm not even a Chevy guy but I want that book of data! Thank you Eric for putting this together.

[@user-kb2bs9hy2v]

Hey Brother I also live in Oklahoma. I watch all your videos 📹

[@Sludge73]

Hell yeah! Thanks for taking the time. I need a pair of SBC heads soon. I've had intakes on my mind

[@HYDESCRAZY]

You are the man.. once again giving yr time and knowledge that most wouldn't share.

[@jamespatterson9446]

Thank you for taking the time to share this kind of interesting knowledge. It is appreciated.

[@donaldhalls2189]

Awesome comparison, thanks for sharing, all the best to you and your loved ones, all the best to your son aswell

[@BEANS-O-MATICtransmissions]

The Performer RPM has ALWAYS tested on top of all dual planes on every test I've seen. It is THE intake to run on a street car with torque and hood clearance concerns. Excellent video and info Eric, definitely looking forward to the retest of the AFR and Edel ! Why TF do manufacturers keep putting that damn vac port there !?!? They gotta stop. You can sink it flush if you tap the hole more.

[@WeingartnerRacing]

I could but I was in a time rush so spacer it was.

[@supersportimpalass]

Yep still the king of dual planes for probably every engine they make them for.

[@BEANS-O-MATICtransmissions]

​@Eric Weingartner totally understandable, thanks for all you do !

[@robertwest3093]

You would think Edelbrock has gotten enough complaints over the last 40 years of making the Performer series intakes that they would have remedied this. Before Vic passed away Edelbrock had competitive prices. After he passed EVERYTHING basically DOUBLED in price. Whoever is in charge now is running the place into the ground.

[@chrisw5837]

@@robertwest3093 edelbrock is owned by a private equity firm. The owners are looking to make more profits not satisfy customers.

[@goratgo1970]

Thanks for posting Eric! For me, more interested in the dual plane tests for my 383 since it will be replacing the anemic 305 in my 91 vert. Camaro for the street. I kept my Weiand Team G high DP which I got back in the 80's, it has most of the divider removed, but was considering buying the Edelbrock air gap for it's benefits instead. Recently found a funky Offenhauser split runner dual plane too. Whichever I use, will need full divider removal since I am switching out the stock EFI for MSD Atomic.

[@AndyR1982]

Knew a guy years ago that swore by the non-airgap performer rpm qjet manifold with an open spacer. Ran that manifold even with square bore carbs. Always seemed to work for him and this makes it look like he may be right.

[@v8packard]

Thanks for the video. I wonder if the TorKLink has odd fuel distribution through the manifold, affecting output.

[@firebirdjone]

I've never known a dual plane to like a 4 hole. Generally the Edelbrock RPM air gap outruns the regular Edelbrock RPM in about everything I've seen, I would have expected the same from the AFR air gap so I'm curious to see that retested with the open spacer. Excellent video and great data.

[@bobg3034]

The RPM was my go to intake!

[@DDDD-of3hv]

I've seen that Torklink one in your videos on the shelf and was expecting something really sweet from it surprised it wasn't better, looks so cool though i'd love to see a dual plane intake test with ones that have the spreadbore pattern, and then compared it to without the spreadbore pattern Edelbrock has many like that or what about a spacer testing that has the divider in it? would like to see how the torque patterns are with a spacer with the divider were these manifolds ported or just port matched? great video

[@richardboggs260]

Thank you for the video!!

[@eeatem]

Great info!! I have a 434 small block Chevy with afr 220 heads and a self- ported Performer rpm qjet manfold.. 1 inch open hole spacer. Worked great!! I would love to see you port a dual plane for a maximum effort small block...sleeper... Keep testing!!!

[@eeatem]

*And test it!

[@timrayburn2461]

Great work.Thank you !

[@logansspeedshop7900]

Eric, have you had any experience with GMPP Fast Burn heads? I know it’s off topic and they aren’t anything super special, but growing up around circle track I’ve always had a sentimental attachment to them. Can’t seem to find any solid information about their capabilities.

[@mikeday8826]

Can't wait for the results when you rerun it. I think the 4 hole probably helped the afr. You know more than I do about this stuff though. Open might make more peak, but 4 hole is probably better overall

[@jamest.5001]

Is there any airflow difference in the rpm air gap, and performer rpm? And at what point does the rpm become a major restriction in power? And can a single plane be modified to get down to the 2000-2500 range and up, I had a similar to torquer intake on 350, 11:1, lunati cam.507" lift 285° total dur, it was a straight up pig below 3500, the heads were not ideal, small valves, 5.0H.O. heads ported, it's all I had, it really came alive about 4400- but the sad part it was done by 5k the total combination was way off, it would done great if it ran a sustained 4500-4800 rpm, I wanted a 3k stall, and a decent aluminum head, and was hoping to get a performer RPM, something that would spin to 6500-6800+/-, and not be anemic below 3k, I was young and dumb, and broke, had to use the parts I had, for other projects, because it was my only ride, I did eventually swap it all to a trick flow head, twisted wedge, Holley street dominator, 10.5-10.7:1 with a 465/485 mild hyd. Roller cam it was on fire then, Chevy would sold tons of trucks if they ran like that!

[@spudnickjquesanar1678]

Back in the day.I had a stock 350 flat top with 882 heads.I took off the factory pre EGR valve intake and bolted on a performer .Night and day difference.Woke that engine up.

[@Classickoolcars]

Was the original factory 2 or 4 barrel ??👍

[@gordocarbo]

The performer EPS is even better.

[@patrickwendling6759]

Thank you for your knowledge 💪🏽 🙏 USA 🇺🇸 USA 🇺🇸

[@utahcountypicazospage5412]

Seems the edlebrock had a cleaner signal to the carburetor sometimes leaving the metal we’re it is from the manufacturer is a good thing for stock to lightly modified

[@TomSmith-cv8hk]

Torklink whilst a Dual Plane it's not a 180 degree manifold, there's more to a 180 degree dual Plane than runner length.

[@bonzainews]

It sounds like you need a patreon. That way you can add a lot more testing to your Channel. I would have bought that first intake manifold just looking at it but I'm glad you told me it's a pile of crap. You save me a lot of money there

[@kimrusso4377]

Hey Eric, Dan from ny. I think when you remove the center divider in the manifolds you might want to stagger the jets like on the L88s, to straighten fuel distribution, check the a/f ratio at each cylinder. Might give you a false reading on manifold modification

[@jamest.5001]

I think maybe the hightech intake would work much better with a flat plane crank, because it seems to be a divided single plane basically,

[@kevinclemence4661]

The dual plane with the 1" open spacer (WITH the cut out) is a very popular internet discussion test. Plenty of this and that. Personally, I'm looking forward to THAT test. Please do it and post the results,.

[@gordocarbo]

Engine masters did this...wasnt worth the effort. Dynos only measure full throttle max power...driveability is the biggie on the st. I never run spacers on dual planes. Maybe Holleys heat shield which is only 3/8 in

[@tomb374]

I'm using mpfi still would you recommend the same parameters for a throttle body?

[@poiter5876]

would the torquelink work better with a 4-7 cam swap ?

[@larryburns4605]

Torque link worked with 2bbl but had to have wider LSA on camshafts.

[@stiffass9539]

I wonder if the torklink would work better on mild engines say in the rpm range of idle-4000 with an Rv style cam.

[@user-kb2bs9hy2v]

Amazing Actually Data

[@MrMechanicandy]

On dual plane is there any area a spacer would be better for torque cure up like 55 mph . I see a dibble polymer adapter is available from Canada ,they say works well on open plane manifold .

[@cygnus1965]

I just watched some dyno video and they didn’t see a bit of difference with a spacer in the numbers. Wish I could remember now what channel it was. Spacers have always been to get the carb away from the heat some more I’ve always thought.

[@gordocarbo]

Have to watch when theres more time. Forgot all about that tork link? Intake. Know appearance isnt that important but wouldnt mind one just to be different Any info on Edelbrock EPS vs their performer rpm? Really interested in A Holley Strip Dominator high rise Z28 intake 300-36? Vs the Edelbrock RPM or comparable Weiand offering. 300-36 I had was loaned to a friend...who sold the car right after he installed it. Cant find a clean one reasonable since Best high rise I used...certainly had that tall Z28 look also.

[@cfmechanic]

Well if u re run afr with open spacer you might also try tork link with open spacer as well.

[@ryno6101]

Ya know you could retap the pipe plug to clear the carb deck. Have had to do that myself it’s a quick fix. Yes email that extra sheet And do you have any old information of BBC oval port intakes?

[@user-kb2bs9hy2v]

Edelbrock designed a wonderful intake manifold.

[@buchmannray]

Would love to see what would happen to Wieand's 3x2 Holley carb setup

[@GJ-DT]

It would lose a ton of horsepower

[@musclebone7875]

Not all engines like the air gap intake manifold. Depends on the engine combination.

[@gordocarbo]

Too bad everyone wants to build via an internet dyno sheet. Thats not real life in car results

[@musclebone7875]

@@gordocarbo exactly 💯 my setup on my car doesn't like dual plane intakes. It's faster with a single plane intake.

[@gordocarbo]

@@musclebone7875 Same...any more torque with a dual plane Id just spin...and have no top end. Use a small single plane well ported does both pretty good

[@musclebone7875]

@@gordocarbo I'm using a dart single plane intake on my 496. I love it, I'm no drag racer, but on the highway my '68 impala pulls hard up top. On the bottom at WOT first gear is useless with my 3.36 rear gears.

[@gordocarbo]

@@musclebone7875 Running enough stall? World products came out with a low rise dual plane which moves a crapton of air. One of the owners designed it for his own car. 496...I wish I had one lol

[@craigchiddo2794]

Cfm difference caused by plenum volume?

[@mikef-gi2dg]

I am a novice DIY guy. I am not sure I my $$$ money will ever allow me to take advantage of Eric's porting skills but hey. I have watched his videos, I think I understand what he talks about, and now he has a book of dual plane intake tests. What ever I build in the future will most likely be home made. So the book is a good starting point...I'm in.

[@jrsgarage3244]

A dual plane divides the carb in Half, my 406 runs 850dp which is 424cfm can you explain how much cfm port needs if flowed 260intake ? I know it's sounds like dumb question ❓ 👍

[@TomSmith-cv8hk]

I take it the port match was similar for all 3, manifold roofs lower than the port ?

[@WeingartnerRacing]

The afr and Edelbrock. The torklink was bigger and closer to the heads.

[@barrykilts4506]

I always wanted one of those what are they,pro link?but everyone always bad mouthed them.ok I was partly right,tork link.still have a small catalog from hi tech

[@xmo552]

I've got to admit I do love dimples especially when she's got a back bumper like a Cadillac. "Dimples who now lives in Temple's Got the law looking for me." 🤠

[@JC-gw3yo]

how about doing a test with out the spacer

[@goofball4718]

Did you flow test all the manifolds too?

[@WeingartnerRacing]

I did several of them in another video flowing dual planes.

[@racingruth9470]

thank you

[@____MC____]

Ive always read that dual planes like open spacers. Ive always wonder if the distrabution is off based on one side looking like it has more volume.

[@gordocarbo]

Prefer no spacer on a dual plane no cut divider either. A peak # from WOT on a dyno isnt same as driving PT on the street

[@____MC____]

@gordocarbo i saw his test. Kinda inspired me to possibly make it work even though i have no way of testing it. Another thing i think about is maybe the higher the throttle boddy sits, the more it draws the fuel across that first turn on roof the intake. I tried to lay that back a bit too. Not much meat there though.

[@russelljackson7034]

Right on

[@NMX777]

I would tend to believe that the story could change with different cams ? Or do you think the Performer would always be on top ?

[@jamest.5001]

The only thing the TQ link has going for it looks, it kinda looks cool, it would be ok if you are not racing!

[@drt6680]

I know this was a year ago. With that said, has there ever been a test of the performer rpm with a 2" super sucker spacer installed upside-down?? Anyone? I heard cats saying they pulled up to +20 hp by flipping it.

[@gordocarbo]

Am I missing sarcasm or humor? if serious that person is full of beans.

[@drt6680]

Figured so, that's why I was channel surfing to see if anyone has put it to the test on a dyno or not. some cats cut the divider on dual planes why not just throw in a open spacer? Would it change how the air/fuel atomized by being pulled through that different directions?

[@bryaninwood683]

Good work good content , Its got me f*#Ked why they haven;t moved that bung hole to the side of the plenum

[@Anarchy-Is-Liberty]

What is blowing me away is, the Edel. RPM is making more average horsepower and torque than the Edel. Victor 2892!! I may have to rethink my induction setup! I guess the real test will be at the track using each manifold and see how it turns out.

[@robertwest3093]

Now, lets see how an old Edelbrock SP2P and a Chevrolet Qjet intake compare to these results. Any guesses? 🤔

[@fasteddy]

Was that the torker sp2p with the carb on a angle, sorry that was a big block 😳

[@robertwest3093]

@@fasteddy I'm not positive but I think the big block intake with the crooked carb pad was the Tarantula?

[@johnmcmullen456]

The old SP2P was the opposite of a performance manifold. Intended for low RPM torque on mid/late 70's Chevy 350 truck engines putting out about 160HP. My father installed one on his 1978 K10 but didn't seem to gain any power or gas mileage over the factory spreadbore.

[@jrsgarage3244]

What size carb, ? Did you use ?

[@WeingartnerRacing]

1000cfm

[@brianeffler7835]

I may be wrong but I would think cutting the performer rpm center down more will hurt output.

[@WeingartnerRacing]

We will see.

[@DDDD-of3hv]

@@WeingartnerRacing can't wait... i know some folks who used to do this on the Pontiac performer and rpm intakes, and saw mixed results. i think there will be variables such as cams/heads/weight/temps/altitude/etc?????? the pontiac edelbrock intakes are dual bolt pattern, so perhaps that's a reason, and as you mentioned how clean is the cut and how deep, along with what size spacers were used. Jim Hand did some of the testing back in the 90s (it think) on his Pontiac setups.... but... he was GOOD with tuning stock type stuff Wasn't that Offy's big deal back in the day, thought they offered a cut down and claimed it gained some upstairs??????

[@bloodhawk6252]

Eric do you think the torklink looks like it's designed for a flat plain crank engine

[@WeingartnerRacing]

I think on paper it looked like a winner but just didn’t happen.

[@bloodhawk6252]

@@WeingartnerRacing have you ever tested the EDELBROCK performer eps.

[@dannobee]

We found the same results when we tested the Torq Link years ago when it first came out. It never performed well on the dyno, no matter what we tried, but some drivers thought it "came off the corners better." I don't see how that could possibly happen though. Wishful thinking. Or maybe because their wallets were lighter.

[@gordocarbo]

@@dannobee Bet it has something to do with runner length and position. Id think it would have good torque off the corners.

[@jamest.5001]

That makes me think,. Can you test a single plane with and without divider?

[@WeingartnerRacing]

Maybe

[@Patrick-xd8jv]

I am surprised that the Hi Tech did so poorly. Possibly the plenum is too large? Thoughts?

[@chrisw5837]

Testing was done at higher rpm’s. Over 4200 rpm. Long runners make low end torque well below 4200. I think this engine was also setup with cam that likes rpms. That intake is not designed for that.

[@gordocarbo]

Application isnt for higher rpm peak power. On a mild st engine I bet it works pretty well. I dig it if anything just for the looks Id run a well setup spreadbore carb with those long runners.

[@tyronewashington2933]

?? Is the Edelbrock Performer RPM, just like the 1970 Corvette 350 LT-1 manifold ???? Is that way it's so good???

[@WeingartnerRacing]

No not close to the same.

[@hughjass7025]

@@WeingartnerRacing What is the difference in performance between the Performer RPM and the GM 14044836 70LT1 manifold?

[@gordocarbo]

performer rpm will out perform the old LT1 intake LT1 isnt bad, works great it depends if a few ponies is worth spending 400 bux plus. Id keep what you have

[@user-kb2bs9hy2v]

​@@WeingartnerRacing Thanks for the help

[@user-kb2bs9hy2v]

14:14 Edelbrock designed a wonderful intake manifold

[@echadmiyodea]

Correction. The Torque Link intake is not a dual plane, or a 180* intake manifold.

[@WeingartnerRacing]

It is a dual plane you can clearly see it

[@ronnieyoung7510]

The open space it's more power then the one with the four holes

[@scottthief60]

I know Gary Dunsworth, I lived in Enid for quite awhile.

[@barrykilts4506]

I know you can’t have em all but I would have been curious to see a professional products dual plane.

[@gordocarbo]

Those suck. Most of those chinese intakes have runners with less volume in the runners than most any US piece

[@craigchiddo2794]

I thought the performer rpm had a lower divider

[@symoncabral8609]

So is there any truth in the therory that the air gap makes no differnce.to a std type manifold becouse the air is not in the manifold long enoghe

[@WeingartnerRacing]

It’s hard to see a difference on the dyno because the air is not moving the same as in the car.

[@JohnDoe-ud2cc]

I want to see a rpm air gap and a victor jr on a graft together. I know one is single plane and one is duel, but I want to see their differences side by side.

[@arodderz]

I just swapped my air gap to a ported Vic Jr with a 1" open spacer about 7 months ago. It was advised by custom cam builder, Mike Jones. 383 roller pulls like a missle and lights the tires instantly anywhere in the RPMs.

[@reinimechanic]

I just read the test in an old magazine. Chevy High Performance, December 2006 page 20. Article name is Big Power For Little Cash. They ran an air gap on test 1 followed by a Victor Jr. on test 2. Mule was a 383 with 195 eliminators and an XE274H

[@gordocarbo]

Depends on the combo, gearing etc. On a street car Id run a good dual plane long before I messed wtih a Vic Jr. Not really a fan of them anyways

[@tyronewashington2933]

That vacuum port , under the carburetor is stupid. Did AFR think you would NEVER install a Carburetor???

[@r1learner178]

I have an old Weiand and it is the same, probably meant for a Quadrajet, not a Holley.

[@reason2gether]

Most carbs have a large manifold-vacuum port dead-center out the back of the throttle plate, which is what I use for power brakes and PCV if needed. The port plug can be recessed flush and does not usually affect the carburetor installation. I almost never use the thin paper base-plate gaskets anyways due to heat transfer. I always use the 1/4" thick gasket or a 1" open phenolic spacer anyways which is the best seen in my testing.

[@gordocarbo]

Agree....They musta overlooked that detail, how many are running spreadbores these days? Brainfart! I dont want a spacer on a good dual plane using a holley.

[@joey120373]

Prasifically…..???😂😂, love what you do, and thank you for putting the time and effort into sharing with us, but the word your looking for is “spesifically” , now im going to get some dinner now, we’re having pasketty.

[@WeingartnerRacing]

I think I say it pacifically. As I get older the brain moves faster than my mouth.

[@joey120373]

@@WeingartnerRacing me too brother!

[@joey120373]

I have a rare set of heads, I would love for you to do a valve job and minor port work, if your interested. I sent an email a couple weeks ago.

[@WeingartnerRacing]

I get so many emails some get overlooked.

[@joey120373]

I’ll resend it, thanks

[@heathrussell4730]

Able to test a cast iron bowtie?

[@rapidride2]

I'd like to see that too.

[@watsisbuttndo829]

Torque link was surprisingly dissapointing.

[@Civic.]

The sad thing about these videos Is I'm trying to find information for the best combo under 4000 rpm for my fully loaded F250. Unfortunately the data all starts far above 4000 rpm so none of this is useful to me because I'll almost never be winding my truck out that far but the power I make at highway RPM is critical because it dictates how much incline I can handle without losing speed.

[@WeingartnerRacing]

You are concerned more with part throttle driving than wide open throttle. Dyno no matter rpm is for wide open throttle.

[@Civic.]

@@WeingartnerRacingI think you've misunderstood. The TLDR version is if you don't have the required power available at WOT then you simply can't maintain a speed at load up an incline no matter how much you push the pedal down. Moving a load up an incline is a function of power. To move a 3300kg truck up a 20% incline at 62mph would require somewhere between 275hp and 290hp depending on the drag coefficient of the truck. But it would only require somewhere between 35 and 60hp on a flat road. So yes on the flat road you would only be using a part throttle application because obviously at the working rpm of the truck will have enough power available to maintain that speed. But as the incline increases, throttle application will need to increase because HP demand also increases. If that power is not available even at WOT then the speed will begin to decline as you climb that incline which may require a change of gear to get the truck into an rpm range where that amount of power is available. In my case, my truck doesn't currently have enough power at any rpm to maintain that speed up a 20% incline fully loaded but that incline at that speed would be very rare. However let's assume I only need to go 37 MPH up that same incline then I would require somewhere between 150hp and 165hp which my truck does have but at what rpm? Because that will dictate the gearing I need to maintain my speed. Now there is another way of looking at this. Lets say the rpm of my final drive ratio at 62mph puts my engine at point where it has 140hp available at WOT. I can then work out that I do not have enough power to maintain speed up an incline of somewhere between 7-8% at that rpm so that is the incline that would require me to change down to a lower gear. So my options are to change my final drive ratio which will increase rpm to give me more power at that speed but that comes at increased fuel consumption under normal conditions. Or I can increase the power output of my motor at the current rpm of my engine at that speed.Ultimately however my goal is to make the most amount of power in the rpm range of my final drive ratio because that will allow me to maintain my speed in the maximum amount of situations without constantly changing down gears. I'm never going to make enough power at that rpm in a NA 5l small block to maintain speed fully loaded up any incline I will face but at the moment my almost stock small block is struggling even up fairly mild inclines. The obvious answer would be to fit a much bigger engine or add a turbo or do what most people do and install a turbo diesel but in my case all of those options will be very expensive and complicated so I'm just looking for options that can increase available hp in the working range of my original motor. I might point out that my truck already struggles at just 2500kg of load and because I know I'm going to be doing a lot of travelling at up to 3300kg in future I'm looking to increase the power output of my motor at lower rpm.

[@johnparrish9215]

You know I kind of wish you had tested a 40 year old tunnel ram along side these just to show how well the old tech worked at every RPM range.

[@BEANS-O-MATICtransmissions]

Engine Masters did that and it makes more power. I believe they said it always does. The question is, can you live with the hole in your hood? It's always a compromise with a street car.

[@WeingartnerRacing]

I would love to do one but then I need other carbs and more time to get everything hooked up. A good tunnel ram like the one from alky digger would be the one to run.

[@DDDD-of3hv]

@@BEANS-O-MATICtransmissions while i have always loved the look of a T-Ram setup, i've never said one in a street car that outperformed a good single setup i dont know of anyone that ran a low profile dual quad, but single or dual carb tunnels i've never seen or heard of them do well i'm sure some super fine tuning maybe they might have, but the basic street type stuff i was around, single was always the king this was in the late 70s to mid 90s/early 2ks i've personally never had one, so going by feedback and what i had seen at the time again... i LOVE the look i do recall some folks mentioning about icing issues with dual quad tunnels, especially a few of the guys with T bucket/kit cars now.. the big boy blowers.... that's a different story

[@gordocarbo]

@@DDDD-of3hv Edelbrock makes a low rise dual plane. Sure they work fine just not a fan of the runner length. Nice eye candy though

[@trestlesrocks]

Performer RPM looks better than the single planes on this engine. Which is surprising to me considering the cam specs.

[@WeingartnerRacing]

It wasn’t.

[@trestlesrocks]

@@WeingartnerRacing I realize that now. I somehow missed the single plane vid with the higher numbers. Only saw the more recent vid with the holly 300-110

[@bethanyhaskiell9116]

Thats weird the Performer RPM did better than the Air Gap this is the first time ive ever seen that happen because usually the Air Gap does better at high and low rpm

[@WeingartnerRacing]

This is not the air gap manifold. Its AFRs version of the air gap.

[@bethanyhaskiell9116]

@@WeingartnerRacing yes I seen that but usually AFR flows better than any Edelbrock so I figured AFR's Air Gap would do even better than Edelbrocks

[@gordocarbo]

Cannot believe mfrs esp AFR would put that vacuum fitting on top of the runner like that!Makes no sense unless someone wants a spreadbore Wonder how close the rpm airgap and afr would be...bet its splitting hairs.

[@bourbonbrewque9433]

Awesome, no need do buy a new dual plane sticking w the edelbrock

[@michaelgiglio1571]

Why test with a cheep slow burning chev stuff. Go with the times man.

[@WeingartnerRacing]

Why not? It makes more power than most people have now.

[@michaelgiglio1571]

@@WeingartnerRacing I don't agree, they make good midrange horsepower but that's it. That terrable combustion chamber doesn't push the piston down right, side thrusting the piston, I can hear it as well. Don't you think chev,s mislead the market confusing the mark for long enought. Now everything else makes more power with parts available. I think they have had their day.

[@WeingartnerRacing]

@@michaelgiglio1571 yeah that’s not true at all. Maybe you can supply some examples. Because this engine makes more power and torque than many modern engines.

[@gordocarbo]

@@michaelgiglio1571 That makes no sense at all Since when does an engine know what brand it is? What terrible chamber are you talking about? 60s era like everything else back then?

[@michaelgiglio1571]

@@gordocarbo look at where the chamber is, on one side, thrusting the piston uneven, and the area for the flame to travel. Not to mention the lack of port flow recovery and the washing out the rings. I can't believe people can't see it. Just a bad design.

[@inscoredbz]

If the afr enforcer heads are the same as an assault heads, the intake ports are raised .100". Which intake gasket did you use and did you notice if the ports on these lined up with the intake runners? I have assault heads and used a 1205, but the gaskets had to have the bolt holes notched to raise the gaskets to line up with the ports.

[@WeingartnerRacing]

1206. The torklink was closest match. The others were smaller.

[@gordocarbo]

Those are the dart copies sold by a bazillion places. Castings at least