Edelbrock Intake Manifold Dyno Test Single Vs Dual + Air Gap Vs Regular

Performance V8 Engines built by John Nijssen

[vincentfarquhar]

I'm sorry, but I wanna see the test with the Q-Jet intake WITH A Q-JET!!!

[HoosierRooster]

We used to take the Z28 manifolds and cut them down like that back in the early seventies

[CrazyPetez]

Pretty cool. I have a Stock LT1 intake on my 355 CSB, in my ‘69 Corvette. The engine is not not built to the extent of your test engine, but it has excellent drivability and good power. I resisted a single plane intake when I was building the engine because I disregarded all the single plane claims.

[symoncabral]

I would like to see one of those chinesium eddy rpm airgap copys run back to back with a real eddy rpm air gap...out of the box comparison

[MrBlackbutang]

Just my favorite girl. Absolutely awesome. U mean milling machine not lathe .

[jasonbeason]

I made my own plywood spacer for my performer rpm. 3/4 inch oak plywood. I just need to cut out that middle divider now.

[michaelstarr]

Yep. In summer, my regular Edelbroken manifold/carb combo would get vapor locked when trying to restart my 350 after going into the gas station or wherever, unless I let it cool off for at least half an hour.
So I switched to the Performer airgap manifold, and I never have vaporlock problems now.

[johnsavoy]

This has been a heated topic since the invention of all V block engines, 6, 8.12. or 16 cylinders. I believe your problems were in the cam, Not a bad cam just not the right cam. I gave up building fast gasoline motors in my late 40's, 30 years ago, but I always found an open plenum helped to balance out everything, from the top of the carb to the top of the piston all pressure was equal, that makes for a smoother running engine, The fact that you had better results when placing the open spacer in proves it . An open plane is the way to go, Also Victor Jr was always a favorite of mine

[TurboJoe]

So for years you were telling everyone to use a single plane Victor when a dual plane RPM was clearly the best choice....lol
Also, you didn't "cut out the plenum divider".
You notched it a very specific amount, copying what Edelbrock has done with the RPM AirGap. I'm sure that Edelbrock dynoed the heck out of that RPM AirGap intake to determine exactly how big of a notch was needed in the plenum divider for maximum performance.

[johngray]

lol watching Roadkill & seeing this channel pop up. Love your shows & now gonna follow your YouTube channel I've learned some tricks of the trade from yall keep up the great work guys.

[RecklessEnterainment]

This is like engine masters before engine masters was even thought of lol

[TyNeePen]

I'm on the fence with the Air Gap intake, at least for my engine. They look awesome and I get the theory behind them. And the only reason I have not installed one yet on my 1970 351 Cleveland is because they only have one part number for the 351 Cleveland. It's neither a 2V or 4V intake. But somewhere in the middle. It's supposed to work on either cylinder head. Now at the moment I'm running the Edelbrock Performer 351 2V intake having swapped from the cast iron intake and 2 barrel carburetor. I'm also running the stock H code heads (2V open chamber). I do have a set of 2V closed chamber heads that I have imported from Australia. I'm not too keen on having a larger intake port into a smaller cylinder head intake port. To me, it seems like that is going to cause incoming air to hit the sides of the intake port on the cylinder head and create turbulence. Can anyone confirm or deny this theory of mine? If they do come out with a true 2V version of the Air Gap, you can bet I'll definitely be looking into it.

[walkingman]

Would have like to seen what the Torker II does in comparison.

[rosco]

They did this same test on Engine Master's years later and the single plane won.

[Nowayjose-zr]

I would bet the minor difference in the regular vs air gap isn't the fact it's an air gap but the fact it's a newer design which, to me, is obvious from the gap/crossover in the plenum.

[JC-gwyo]

I found the same results In my '70 Z-28.The factory aluminum manifold was a much better overall manifold over the open plenum manifolds I tried. GM did a great job as their manifold worked best for me on the street... The magazine whores lied to us about open plenum manifolds... No surprise

[canabox]

You should have flipped the pistons around. It’s worth 100 HP!

[MartinOttlyk-xeyi]

Why not test the Edelbrock Torker 2 ? Would be better street wise for some motors .
Thnx for the great video .

[bolwell]

I do wonder what influence cam/head combo would have on the effectiveness of the divider notch

[scotthultin]

I know this is a really old video but the only thing that I didn't see or even hear you talk about cuz accelerator pump and ratios those are what get rid of the bar coming out of the hole but that's only if it's a street car because if you're a drag car you're leaving it 48 to 6200 right off the starting line there ain't going to be no bog