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Old 05-03-2006, 12:09 AM   #1
RainMaker
Scooby Specialist
 
Member#: 93301
Join Date: Aug 2005
Chapter/Region: NWIC
Location: Portland, Oregon
Vehicle:
06 CGM STI SM#17
Now with alot less verve!

Default Manifold and Header Dyno Comparo results

We bought all the stuff for a dyno comparison (and road spool logging) of the following items:

1. stock manifold (a stage 2 06 STi) (free)
2. IOTA (Gotpnp.com) ported manifolds and crosspipe ($160+shipping+core)
3. Crucial Racing ported and coated manifold and coated Injen crosspipe (~$500+core)
4. Perrin's new Equal Length headers ($779+shipping)
5. Gruppe-S un-equal length coated headers ($575 shipped)

The following folks together contributed over 3/4 of the monetary costs of the dyno:
1. Unibomber ($20)
2. JitenShakun ($5)
3. Senortighto ($20)
4. SilverSurfer04STi ($20)
5. modaddict ($10)
6. evodon84 ($10)
7. Verc ($10)
8. Crucial Racing ($20)
9. TylerTR ($10)
10. Freon ($20)
11. Tucker63 ($20)
12. EKW ($10)
13. KipA ($10)
14. WolfPlayer ($10)
15. JBlaine ($28.49)
16. Reid-o ($15)

Q: Why different days?
We dyno'd after we got there with all the learning the car could have done (several weeks). We then, for a last run, reset the computer (not shown above). The car lost a bit of power and torque (~10 tq/hp). This is significant enough to us that we'd like to let the car learn each of the manifoldsheaders through a day or two of pretty hard driving. We are using Cobb's standard stage 2 map. If we changed the manifolds out on the dyno for one big Manifoldapalooza, we would have to reset the computer each time, and we believe this will produce inaccurate results...

Results:

All logs are contained in the following post:
http://forums.nasioc.com/forums/showthread.php?t=974977

Dyno graph key:
RunFile_002 - Stock
RunFile_006 - IOTA
RunFile_011 - Crucial and Injen
RunFile_016 - Perrin Equal-Length, non-coated
RunFile_020 - Gruppe-S UnEqual-Lenth, coated

Uncorrected:


SAE Corrected:


I can post individual comparisons as requests come up, but those results should give you the data in a quick hit.

A opinions on the results:
- As the money goes up, so do the results. THere were no extreme values in comparison to others. Each cost seemed to buy you incrementally more power.

- The only hit to spool was the classic unequal-length headers. I suspect under hot, demanding conditions, the system could get hot and would make the hit to the spool less.

- Spool is effected almost entirely by the ability of the system to keep heat in the exhaust, and the fittiment of the system so as to prevent leaks.

- For the same results, the Crucial setup or the IOTA porting with an Injen crosspipe offers stock-like fittiment and probably VERY few issues come warrantee time.

- The Perrin offer top notch results and top notch construction at a top-notch price (especially after coating and wrapping). The downside/upside is the change in the sound of the car. I, personally, like it. But I have no aversion to sounding like a Honda and no special attachment to the Boxer sound. Others certainly may differ. If I need to listen to a lope, I have a big-cam Chevy LS-1 in the garage The Perrins make the car a bit quieter also, in my non-scientific opinion. Certainly less resonant on the highway.

Let's discuss
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Old 09-29-2008, 10:22 PM   #2
fullerton
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Member#: 122030
Join Date: Aug 2006
Chapter/Region: MWSOC
Location: Private Profits - Social Loss
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Can you re-host the picts?
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Old 09-01-2009, 09:32 PM   #3
schrags
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Member#: 162529
Join Date: Oct 2007
Chapter/Region: MWSOC
Location: Kentucky
Vehicle:
2006 STI SGM
2004 4Runner

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pics?
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