Running Bullets off Colectors,Need a RETUNE??

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Oct 7, 2007 | 05:33 PM

BTLFEDSS

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Running Bullets off Colectors,Need a RETUNE??

Just as the title says right now my converters out getting restalled. and i'm swapping headers which already came with a bullet of the collectors with turndowns and hangers already.My question is that i want to get to the track before it closes one last time,how much will this effect my tune from ORY/CUTOUT?????
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Oct 7, 2007 | 05:52 PM

gator's 99TA

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IMO if you had a decently free flowing catback and good Y pipe, it wont change much in terms of ET or MPH.

Oct 7, 2007 | 06:34 PM

JL ws-6

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I went from a qtp gutted Y and a LM to a set of turndowns off the collerctors and it didn't make any real difference power wise or tune wise, unless your exhaust was a logjam, it should be fine, as long as you aren't trying to add or remove any o2 sensors that may or may not have been turned off.

Oct 7, 2007 | 07:52 PM

BTLFEDSS

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Exhaust be for was LT's with a ORY,Cutout,and SLP Dual/Dual.Rear o2's are shut off
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Oct 7, 2007 | 08:12 PM

Loudmouth LS1

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You shouldn't have to change the tune much, if at all, but I do think you will see some gain.

Oct 7, 2007 | 08:54 PM

Slowhawk

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Just make sure the 02's have atleast 18" of leak free pipe after them.If fresh air hit's the 02's it will screw the tune up.
I'm also thinking on your setup that that exhaust will probly hurt power more than help.

Oct 7, 2007 | 09:11 PM

Loudmouth LS1

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Quote:

Originally Posted by Slowhawk

I don't know his setup, so I can't comment on if it will hurt or not, but i've been running bullets with turndowns straight off the collector since I was a cam only car, and at that point, with just a little 228 cam I picked up like 2 mph goin from an ory with a cutout to the bullets with turndowns off the collector.

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Oct 8, 2007 | 04:38 PM

BTLFEDSS

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From: Mass

Quote:

Originally Posted by Slowhawk

I will be running a Y pipe set up just to have one fabbed up and would like to make it to the track one more time,Bullet set up is already made for the haeaders,and is all welded up and ready to go
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