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DC headers= Loss of TQ?

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Old Nov 21, 2003
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DC headers= Loss of TQ?

I drive a 03 SI
I just installed a dc ceramic header into mty car, i also have a CAi injen intake. After i installed my DC header, i noticed a considerable drop in TQ. Is this normal to see?? do i gain any thing from installing the headers like HP gain? cuz i dont feel any. Ne of you guys out there have ever experienced this? Im thiniking of puting back my stock. is this a good idea. or any ideas how to get my Tq back?

Thanks guys

oh yea i found this at an import tuner webside, looks like the same happened to this car too.

http://www.importtuner.com/tech/0307it_ppcivic/
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Old Nov 21, 2003
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Man I looked at the link and see what you taliking about.
The dyno results do show a drop in peak torque.
weird.

here is the end resoluts on that link

performance chart

HP Level HP+ TQ Level TQ+

B Baseline 153.3 * 131.9 *
1 K&N Air Filter 160.6 7.3 135.3 4.4
2 Tanabe Exhaust 163.4 2.8 134.8 -0.5
3 DC Sports Header 166.9 3.5 129.7 -5.1
Final 166.9 13.6 129.7 -2.2
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Old Nov 21, 2003
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wrong forum
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Old Nov 22, 2003
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trade off of torque for hp.

u can't feel the hp cuz its 3-4 hp according to import tuner (hardly a sound fact, but yeah whatever)

the fact that their baseline test was like 153 hp kinda makes me raise my eyebrown...

do u feel the torque lost that much? if so ... u might want to consider switching back to stock.

stock parts are usually always tuned for torque, and not high end hp... well, some cars anyway.
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Old Nov 22, 2003
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i thought it might be just a lose of torque in the low end, cause thats what it felt like when i first installed my intake, but i also have the same header so i guess i see if my low end torque goes down more when i install it
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Old Nov 22, 2003
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ic, i might switch back to stock. ne one want to buy a week old header? $250 i can go less
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Old Nov 22, 2003
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i think eventually it will make up for it with other internals or other products as well
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Old Nov 23, 2003
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yea true, i finally deciding to keep it on.
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Old Nov 23, 2003
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overall i would think it would benefit you so good choice of keeping it on
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