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Official Aftermarket Header Discussion

 
Old 12-12-2006, 02:11 PM
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I personally have been up in the air as well on deciding which header I want, which is what ever one yields the most gains on an NA AP2 car. I've been debating between the J's, ASM, and Tracy Sports. Any light that people can shed on them is much appreciated.

Great idea for a thread BTW!!
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Old 12-12-2006, 02:38 PM
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If you are looking for the highest HP gains from a header I would wait till the Hytech header is released. I have seen a prototype and it looks amazing.

Personaly I have the Mugen 2.2 (AP2) Header and like it alot. more power and smoother powerband from about 3500rpms on up . I think Kings website states 10hp gain for 2.2l header and no gains for 2.0l header. Both will reduce weight though.

Friend had ASM header and gains seem to be the same as the Mugen at least with the butt dyno.

Great thread BTW
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Old 12-12-2006, 03:33 PM
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Add OBX to the list. It's crap but it's available
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Old 12-12-2006, 03:44 PM
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LOL! Added the ever annoying ebay over-populating $200 header
Someone should buy one of those stupid things just to see what it'll do, then turn around and sell it. It's not like you're out a whole lotta dough...
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Old 12-12-2006, 06:28 PM
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I dyno'd my car earlier this year in January which netted me about 198.4 HP/127 TQ to the wheels. I installed the J's SPL header around June/July and wanted to wait till weather conditions were similar to the baseline run before to get a more accurate gain #. Baseline run was done ~60F and when it was installed, it was over 100F!

Well, here are the results of my recent dyno run done a couple weeks ago ...

Dynosheet with HP/TQ #s :



Dynosheet with HP/AF #s :



202.8 HP/134 TQ (+4.4HP/+7ft-lbs TQ peak) without any tuning. The good part were the gains everywhere under the curve! In some places (e.g. just past 6K), I picked up almost +14 HP and +12 TQ but most gains were in VTEC range. Quite happy with the result. I'm sure with tuning I can lean out the A/F ratio to pick up some more peak horses but for a straight bolt on, I think those are decent gain #s.

Specifics on the car/conditions :

- AP1 (2001)
- Comptech Intake
- Megan Racing Test Pipe
- J's SPL Header (only addition since baseline run done in January)
- J's Racing 60RS
- '03 OEM ECU
- About 68K miles on the odo (about 4.5K more miles since baseline run)
- Temp conditions were similar at about 60F or so
- Both baseline and update dynos were performed at Dyno-Comp in Scottsdale AZ using the Dyno Dynamics Dynamometer


Merv.
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Old 12-12-2006, 06:30 PM
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Nice gains, how much dose that header cost?
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Old 12-12-2006, 06:37 PM
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John (neveronlineS2k) did I get a chance to show you the engine before I moved to NY? Hit me up on my cellphone, I lost your number.


Anyway, +1 on the Hytech, they built me a custom long tube setup with 18 inch secondaries and a megaphone up to 2"3/4, worth every penny. Plots to come.
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Old 12-12-2006, 06:44 PM
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Do any of these headers have provisions for installing the stock heat shield for the sleeper look?
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Old 12-12-2006, 06:48 PM
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BlownAP - I bought mine used for about $1100 but you should be able to get a new one for about $1250 shipped.
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Old 12-12-2006, 06:57 PM
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Thank you Rfever. The J's description has been edited. That's exactly the kind of information I'm looking for

BTW, those midrange gains are massive for just a header change!!

Your AFR's look like they could use a little fine tuning...you've got alot more power to extract there, especially above 8000 rpm...
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