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Old 11-12-2007, 11:37 PM   #1
Dyno Flash
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Default The Quest for stock ecu / engine power continues - Header testing ! 567 WHP !

Today I was looking for more top end power so i decided to try a set of coated and wrapped 4 into 1 Agency Power headers on my STI to see if I could squeeze out a few whp.

Suprizingly, the headers made a load more TQ and sigficantly faster spooling

I think the head / cams are at the limit of what they can flow and its not going to make much more whp without some head porting

The WHP was only slightly higher

Same boost level here is the A - B test

Agency Power 4 into 1 header vs stock header with injen cross over pipe




I made a video of the testing process I will get that posted up tomorrrow.

Al
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Old 11-12-2007, 11:50 PM   #2
csdotcom
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Lookin good, hopefully I'll get to come check out your shop the next time im back home in CT!
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Old 11-13-2007, 12:16 AM   #3
DoctorNick
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Same fuel/timeing numbers on the back to back or were those massaged with the addition of the 4-1 header?
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Old 11-13-2007, 12:45 AM   #4
spoolindc2
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Nice! Surprising numbers on the TQ values over the stock header... Does the car sound different now with the header? I know alot of people have complained about the fact headers make the car sound "ricey"... Not that your street monster sounds anything close to rice... Keep up the good work bro, love your ****!
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Old 11-13-2007, 08:30 AM   #5
HS182003
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Just curious. How come u went from 576tq to 546tq on the stock header? Now ur making 560tq after u lost 30tq originally?
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Old 11-13-2007, 09:59 AM   #6
Dyno Flash
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The TQ value seeems to vary greatly depending on if the tires spin on the dyno

I beleive that these two plots show as accurate a comparision as I can produce between the header and no header.

I must add that with the header the car is noticeably more difficult to manage on the dyno when it starts to spool up it feels like it wants to pull to the side. The STI is making nearly as much TQ down low as my 956 whp Evo is.

Al
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Old 11-13-2007, 04:44 PM   #7
blowbyu24
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man it just kills me to know that i went through the whole process of getting the motor built(which failed) but now all this data from you and the guys from PR shows how great the stock ej257 really is. I can't believe that you have made a 567whp beast, a DD that drives like one!!

so impressed
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Old 11-13-2007, 07:43 PM   #8
05stisilver
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Have you tried any other headers? I have almost the exact same setup that I'm getting tuned this weekend by Gadiel. I have the stock headers pnp'd and a grimmspeed crossover. Just wanted to see what works best with this setup.
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Old 11-13-2007, 07:50 PM   #9
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Quote:
Originally Posted by blowbyu24 View Post
man it just kills me to know that i went through the whole process of getting the motor built(which failed) but now all this data from you and the guys from PR shows how great the stock ej257 really is. I can't believe that you have made a 567whp beast, a DD that drives like one!!

so impressed

its all how the car is tuned...if your tuner knows what they are doing you can push stock components especially with this motor VERY far. Although Al is one of the higher HP stock motor guys around there have been ppl doing it for years. If you take a look at Phil over at Element Tuning ...Stock Motor, Trans and until recently stock Differentials...and he was dominating many of the time attack events...goes back to what i was saying in another post...its all the right combination and more importantly tuning the car to a point not beyond what its capable of handling
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Old 11-13-2007, 08:32 PM   #10
Boxer112
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thumbs up.... keep it going..
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Old 11-13-2007, 10:09 PM   #11
mxpunk
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dyno numbers are cool Al

get it to the track!
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Old 11-13-2007, 10:52 PM   #12
Dyno Flash
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Interestingly - I went to another dyno Jet facility this evening and made 562 whp - seems our dyno is very close to other 424 X units

Al
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Old 11-14-2007, 09:01 AM   #13
Boxer112
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would it be bad thing to post up what shop you went to?
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Old 11-14-2007, 09:47 AM   #14
Dyno Flash
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I posted the dyno sheet in the other thread - I will have a video also of it at some point

Al
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Old 02-26-2008, 12:20 PM   #15
kike_ej20
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Al,

What header,based on you experience, between unequal length 4-1 and equal length 4-2-1 usually has the best power curve and peak power?

Thanks
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Old 02-26-2008, 12:36 PM   #16
Phatron
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An unbiased (IE "we're not trying to sell you the header i sell") comparo was done by some members


http://forums.nasioc.com/forums/show...header+comparo

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