Intake
 

Air Gap

Edelbrock perfomer rpm is good, the zz502 gm version is essentially the same. In a dyno test here a year and half ago a friend had a 502 w edelbrock 290 oval port heads, pretty small cam. He bought a vic jr as they seem to be popular, afrs on a few cylinders like #8 were over 2 points leaner (carbed). motor peaked below 5500. We bolted a ported standard performer intake on and picked up somewhere around 20 to 30 ft lbs tq and almost 10 hp (on top), #3 cyl at wot was over 2.5 points leaner than the average of other ones though. We took it off and put agm zz502 intake on which looks identical to me to a perfomer rpm and picked up even more tq, thruout whole range and a small hp gain on top. down in the 3600 to 4500 range I think overall he picked up around 50 ft lbs over open plenum. I will say this though, the vic jr was bolted on out of the box and had smaller ports than the heads , the zz502 intake was stock too, Smitty

Always nice to see real back to back tests 👍. So in mild 502 builds you are fine even with the performer intake. J lingefelter 502 peanut port engine made over 500hp at 5000rpm with stock edel performer intake and zz454 roller cam. have always had good luck with rpm airgap manifolds in my small blocks, they make good torque from idle to max rpm. Going to dyno test my peanut port head 502 during this winter, with edel rpm squre bore or weiand 8123 spread bore, oval port intakes, hopefully both intakes. Results can be seen in my 454 peanut port build topic.

We ran/tested the ported standard performer intake because my dyno partner had one from a motor home laying on shelf at his shop (so it was free). anything it does for most part, a performer rpm does better. Because we saw 15.5-1 afr on #3 cylinder at wot when others were12.5 to 13-1, I personally would never use one on something that gets held at WOT, the cylinder to cylinder distribution was much better on the performer rpm in my experience, Smitty

Here is one on River Dave's Place. He is asking too much, I offered him $350 shipped and he responded with about $400. I found one on Craigslist locally for $200, New and Polished.
Good Luck.
https://www.riverdavesplace.com/foru.../#post-3515018

Or better yet $328 shipped new from Jegs

Was wondering if you ever did any dyno with the old twisted Torker intake and how the AFR were?

No I havent,i only got my dyno and data acquisition, 10 02 sensors etc up and going here 4 1/2 years ago and have only dynoed about 10 or 12 carbed BIG BLOCKS, none have had that intake, the rest have been EFI, Smitty

just be clear carb set up ? is the route your going for sure ? I did not read all the post here.

I am fan of the Brodix Alum heads. and they have couple of new intakes on the market that have done well.

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With stock zz502 roller cam?

[QUOTE=gmhdfan;4716672]Was wondering if you ever did any dyno with the old twisted Torker intake and how the AFR were?[/Q
We tried one on a 468, it was basically a turd compared to the RPM airgap. Way less torque across the board with no more HP all the way to 6400 rpm. A/F ratios were all over the place, it may work better on a different motor.

Just get what everybody knows is correct and be done with it. Air Gap dual plane, you are not building a 1,000hp offshore boat.

Yes carb setup. Im running the merlin 320cc runner heads on a 496. Im still looking for a cam but figure I will end up with something like the merc 525 or crane 731 cam.

400 million years ago, I tuned a few different cars at the track with those intakes. A low compression 454 and a few higher compression 454's.

The intakes sucked bad. But, they fit under some low hood heights and we found out that was the only reason they where made. :(

This was before Eddy RPM days, but Dart had had just come out with their single plane intakes and that was that. Weiand dual planes or Vic Jrs or Holley Strip Dominators or Darts for those cars.