Sheepey Inc. tubular exhaust manifold Dyno results
Nov 7, 2013, 09:06 PM
#1
Sheepey Inc. tubular exhaust manifold Dyno results
Hey whats up guys and gals... I recently installed my Sheepey Inc. stock frame tubular exhaust manifold on my Evo 8 RS (Mod list listed below). So here are some before and after results w/ NO adjustments done to the tune yet...Im hoping to adjust the tune here soon and post those results up as well since you can see that by just throwing the manifold on we gained 46whp and 30lbs/tq 
I really think once the tune is slightly adjusted the gains will be even larger! Time for some pics... Enjoy.....
-Mod list.....
Evo 8 stock block (120k miles)
EF2.5 turbo (non ported)
Sheepey inc. stock frame tubular manifold
GSC S1 cams
Stock intake manifold & throttle body
ETS LICP v2
XS Engineering IC
Sheepey inc. UICP
Tial 50mm BOV
ACT clutch
Greddy 3" turboback exhaust
Titek O2 housing
3" SD intake
Bosch EV14 1200cc injectors
Buschur double pumper
3port boost controller
TScomp e85 tuned
-Stock exhaust manifold vs Sheepey Inc. stock frame manifold-
I really think once the tune is slightly adjusted the gains will be even larger! Time for some pics... Enjoy.....-Mod list.....
Evo 8 stock block (120k miles)
EF2.5 turbo (non ported)
Sheepey inc. stock frame tubular manifold
GSC S1 cams
Stock intake manifold & throttle body
ETS LICP v2
XS Engineering IC
Sheepey inc. UICP
Tial 50mm BOV
ACT clutch
Greddy 3" turboback exhaust
Titek O2 housing
3" SD intake
Bosch EV14 1200cc injectors
Buschur double pumper
3port boost controller
TScomp e85 tuned
-Stock exhaust manifold vs Sheepey Inc. stock frame manifold-
Last edited by louiesevox; Nov 7, 2013 at 10:16 PM.
Nov 7, 2013, 11:22 PM
#5
A/F ratio, spool, and of course top end, are quiet different.
Maybe a better comparison would be to optimize on both, and test, same boost level, but timing and fueling optimized, to really see the effect.
Was this test on same dyno, the same day, without any adjustments to the dyno as well as no adjustments to car?
The car with header is leaner- which will give more power. Not sure that header can lean out the A/F, perhaps, but I would consider this important factor in the comparison, and the A/F ratio difference follows the power output difference...
No conclusion here, but to make a more controlled test should be performed
Maybe a better comparison would be to optimize on both, and test, same boost level, but timing and fueling optimized, to really see the effect.
Was this test on same dyno, the same day, without any adjustments to the dyno as well as no adjustments to car?
The car with header is leaner- which will give more power. Not sure that header can lean out the A/F, perhaps, but I would consider this important factor in the comparison, and the A/F ratio difference follows the power output difference...
No conclusion here, but to make a more controlled test should be performed
Nov 7, 2013, 11:46 PM
#6
That exhaust manifold looks very high quality.
I will be cleaning the tune up with the tubular manifold shortly and will make sure the pulls are done on a level surface for the best accuracy possible.
alpinaturbo: i can richen the tubular manifold and we can see if its the AFR doing that or not. sometimes cars don't make more power when you lean them out past a certain AFR, and sometimes they do. but there's always a certain AFR level that once you hit if you keep leaning it out the gains are minimal if non existent at all.
I'm glad you shared it as is untouched Louie for 100% back to back with no touching. The Leaner AFR also indicates the tubular is out flowing the other manifold quite a lot (granted weather didnt play a roll in the afr).
I will be cleaning the tune up with the tubular manifold shortly and will make sure the pulls are done on a level surface for the best accuracy possible.
alpinaturbo: i can richen the tubular manifold and we can see if its the AFR doing that or not. sometimes cars don't make more power when you lean them out past a certain AFR, and sometimes they do. but there's always a certain AFR level that once you hit if you keep leaning it out the gains are minimal if non existent at all.
I'm glad you shared it as is untouched Louie for 100% back to back with no touching. The Leaner AFR also indicates the tubular is out flowing the other manifold quite a lot (granted weather didnt play a roll in the afr).
Nov 7, 2013, 11:52 PM
#7
What you see at 7K should be taken serious. anything past 7K looks caused by road bumps. We will get some more accurate graphs up shortly after i make some adjustments with the tubular manifold.
For others that are not aware, this is Riley's old car. This is the first car that tested the EF 2.5.
For others that are not aware, this is Riley's old car. This is the first car that tested the EF 2.5.
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Nov 8, 2013, 07:44 AM
#10
I think this manifold is competively priced compared to other stock frame tubular manifolds of its quality and gains.... At the end of the day i think its really up to the owners preference and power goals tho
As for myself... I only use quality parts in any of my builds and I like alot of powah so I couldn't pass up one of these bad boys
Nov 8, 2013, 08:04 AM
#11
That exhaust manifold looks very high quality.
I will be cleaning the tune up with the tubular manifold shortly and will make sure the pulls are done on a level surface for the best accuracy possible.
alpinaturbo: i can richen the tubular manifold and we can see if its the AFR doing that or not. sometimes cars don't make more power when you lean them out past a certain AFR, and sometimes they do. but there's always a certain AFR level that once you hit if you keep leaning it out the gains are minimal if non existent at all.
I'm glad you shared it as is untouched Louie for 100% back to back with no touching. The Leaner AFR also indicates the tubular is out flowing the other manifold quite a lot (granted weather didnt play a roll in the afr).
I will be cleaning the tune up with the tubular manifold shortly and will make sure the pulls are done on a level surface for the best accuracy possible.
alpinaturbo: i can richen the tubular manifold and we can see if its the AFR doing that or not. sometimes cars don't make more power when you lean them out past a certain AFR, and sometimes they do. but there's always a certain AFR level that once you hit if you keep leaning it out the gains are minimal if non existent at all.
I'm glad you shared it as is untouched Louie for 100% back to back with no touching. The Leaner AFR also indicates the tubular is out flowing the other manifold quite a lot (granted weather didnt play a roll in the afr).
Nov 10, 2013, 05:07 AM
#15
there has been an awefull lot of stock manifolds tested over the years. buschur alone tested like 6 back to back same engine. (best gain 12hp) none came close to these results. all have been in the 5-20hp range. with many of those tests likely snake oil claims. I would say you will not see anywhere near 46hp gains from just replacing manifold.