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Originally Posted by articfriends
(Post 4716552)
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
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Originally Posted by articfriends
(Post 4716611)
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
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Originally Posted by gmhdfan
(Post 4716672)
Was wondering if you ever did any dyno with the old twisted Torker intake and how the AFR were?
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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. . |
Originally Posted by Baja Rooster
(Post 4716654)
My ZZ502 engine came with The Eddy Performer RPM and the thing was a torque monster straight from idle and pulled hard up to 5600 until I re-propped. |
[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.
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Originally Posted by JaniH
(Post 4716749)
With stock zz502 roller cam?
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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.
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Originally Posted by gmhdfan
(Post 4716672)
Was wondering if you ever did any dyno with the old twisted Torker intake and how the AFR were?
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. |
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