intake/header/exhaust how much gain? - B15sentra.net - Nissan Sentra Forum
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#1 Old 08-06-2007, 03:35 AM
jakuranbo
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intake/header/exhaust how much gain?

just wondering how whp gain do you get from the basic bolt ons (i/h/e)
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#2 Old 08-06-2007, 08:10 AM
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I would guesstimate about 10 to 18ish maybe......

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#3 Old 08-06-2007, 09:49 AM
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10 is a good guess. bolt ons get you nowhere, trust me i have em all plus 100 shot nitrous and my car still feels slow to me.
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#4 Old 08-06-2007, 10:22 AM
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..... i/h/e will not make that big of a difference. compared to stock.... just a bit louder and you can hear the secondary valves .

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#5 Old 08-06-2007, 10:48 AM
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I'd say about 15 HP.

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#6 Old 08-06-2007, 12:58 PM
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i/h/e took off .6 in my 1/4...makes a big difference in autos

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#7 Old 08-06-2007, 02:09 PM
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Quote:
Originally Posted by 2K2RedSpec-V
I'd say about 15 HP.
that would be my guesstimate

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#8 Old 08-06-2007, 02:33 PM
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fully bolted with cams and a tune is a good 30whl. http://www.sportcompactcarweb.com/te...c_nissan_se_r/

02' Spec V I/H/E/MMI [B]
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#9 Old 08-06-2007, 03:09 PM
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if base dyno is 145. i dynoed 160.
do the math

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#10 Old 08-06-2007, 03:54 PM
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Umm... Intake has been dynod at 5-7whp, exhaust has been dynod at 4-5whp, and the header has been dynod at 10-12 whp.

This is just what I have read many times... if it's false, it's false, but I know I have those mods, plus a few more, and my spec is a hell of a lot quicker than a stocker. Flame away, I don't care.

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#11 Old 08-06-2007, 05:24 PM
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Word, header dyno's at 11whp by nissan sport. My intake dyno'd at 7 1/2 whp by K&N, and cat-back I haven't actually seen. So you figure with just those two parts of mine, I'm already at 16+ and I've only added more. Flame on guys, it's all over the net man.

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#12 Old 08-06-2007, 10:20 PM
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Quote:
Originally Posted by armpitt
10 is a good guess. bolt ons get you nowhere, trust me i have em all plus 100 shot nitrous and my car still feels slow to me.
100shot feels slow? when i had mine at that it was insane....for a fwd auto anyways

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#13 Old 08-07-2007, 01:13 AM
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Well these cars pick up alot with full exhausts.Think about it you are dropping two cats and in my opinion 2.5s need at least a 2.3ish exhaust to breath right.2.5 i think is perfect.Im not sure what stock measurments are but compared to my aftermarket its tiny as hell.

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#14 Old 08-07-2007, 01:35 AM
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http://www.b15sentra.net/forums/showthread.php?t=152567 A few dyno sheets plus some interesting discussion on what our cars should do with mods.

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