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Headers Back, will I run lean?

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Old 08-26-2008, 11:06 PM
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Default Headers Back, will I run lean?

I have a LQ9, 317 heads, 232/234 cam, with stock exhaust (3rd gen y pipe and single muffler).

I just bought edelbrock 65732 (shorty headers) and intend to put those on along with true dual 2.5" sidepipes. Will this throw off my tune horribly? My tuner is two and a half hours away so it needs to be able to cope for atleast that long.

It is dyno tuned but only put down 289RWHP with the stock exhaust. Any opinion is greatly appreciated guys!
Old 08-27-2008, 12:50 AM
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I doubt it. Assuming you've got a factory tune currently, which is quite rich and assuming the correct injector constant, you should be ok.
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Old 08-27-2008, 10:08 AM
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It's a dyno tune, and stays 13.0 on the dyno and runs a tad rich WOT. I just don't want to burn the motor up running lean, i realize the new exhaust will really OPEN it up.

Going Edelbrock Shorty headers
true dual 2.5" side pipes
Bullets/Borla XR-1s

Any more suggestions or opinions?
Old 08-28-2008, 01:59 PM
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would single 3" be better?
Old 08-28-2008, 03:41 PM
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IDK anything i do to my car throws off the tune..lol I have very quiet restrictive cat back opening the cutout makes the car richer....so idk




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