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View Full Version : GheyrodX - bigger, fatter, gheyer!

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Kracka
10-03-2012, 07:23 AM
RED = MAP ported exhaust manifold (SPC coated)
BLUE = MAP short-runner tubular exhaust manfiold (SPC coated)

http://accessecu.com/dyno/graph.php?gb=0&hp=1&torque=1&rpm=1&sl=1&sln=1&sat=0&cb=0&dgr=1&smm=0&sg=1&runid1=3777&rgb1=000000255&runid2=4008&rgb2=204000000
turbotalon1g
10-03-2012, 07:30 AM
Crazy you make that much power on 93, badass.

You think the short runner might perform better with a bigger turbo or more RPM?

Looks like the ported does perfect for everywhere on a street car.
Kracka
10-03-2012, 07:50 AM
You think the short runner might perform better with a bigger turbo or more RPM?
Most likely. The only place the short-runner showed an advantage was in the upper RPM band. With these results, I'm going to stick with porting as my recommendation for stock and smaller stockframe turbos.
Tachyon
10-03-2012, 08:36 AM
Looks like an intelligent decision.
Kracka
10-03-2012, 08:42 AM
Looks like an intelligent decision.
I agree, thank you. I should have just done the MAP ported from the beginning...

BLUE = PPI "extreme" ported
RED = MAP short-runner
GREEN = MAP ported

http://accessecu.com/dyno/graph.php?gb=0&hp=1&torque=1&rpm=1&sl=1&sln=1&sat=0&cb=0&dgr=1&smm=0&sg=1&runid1=3071&rgb1=000000255&runid2=3777&rgb2=204000000&runid3=4008&rgb3=000153000
scheides
10-03-2012, 08:51 AM
Damn! That or you should have gone to a long-runner instead of the short-runner mani!
Halon
10-03-2012, 09:18 AM
Ported stocker looks like a win to me. Not only dyno chart wise, but also keeps the setup simple / OEM under the hood which is always a plus in my book.
Kracka
10-03-2012, 09:25 AM
I agree completely; plus it's much better for heat management, less risk of cracking, etc.
Murlo26
10-03-2012, 09:26 AM
I compared all of these manifolds, the short runner was huge gains over ported stocker at ~550whp, baseline was like 525, and with short runner it was 550ish.

I'd post it here but not the right thread.

I agree though, on a stock turbo car the ported manifold is king.
Kracka
10-03-2012, 09:29 AM
I compared all of these manifolds, the short runner was huge gains over ported stocker at ~550whp, baseline was like 525, and with short runner it was 550ish.
I agree, with an EF4 and big power I think the tubular will dominate. We know how they compare on the EF2 and EF4...wonder how they'd stack up with an EF3?