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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

tune needed with headers??

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Old 10-23-2008, 08:47 AM
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Default tune needed with headers??
im looking to buy some longtube headers and y-pipe for my 96 formula. and was wondering does anyone know if you have to get the car retuned before it will run properly once the headers are on? thanks for any input
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Old 10-23-2008, 09:21 AM
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Its recomended that you get it tuned, espically if you are deleting the AIR and EGR. I drove mine for about a week untuned, and it seemed okay, other than having an SES light.
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Old 10-23-2008, 09:29 AM
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oh ok thanks. i was told the ecu was tuned for the manifolds and would run worse with headers if it wasn't retuned
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Old 10-23-2008, 09:41 AM
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are you going to be deleting the air and egr? if so then i would go ahead and get a tune. Like i said, i drove mine for about a week waiting for my tune to come in. I didnt really notice and problems other that the car staying in open loop.
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Old 10-23-2008, 09:45 AM
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it will run better with a tune. Also will provide better gains. Id do it.
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Old 10-23-2008, 04:18 PM
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yea i will be keeping the air and egr for now
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Old 10-23-2008, 04:21 PM
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Yeah it will need to be tuned to run properly!
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Old 10-23-2008, 04:23 PM
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will it run like crap otherwise? or just not as well as it could?
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Old 10-23-2008, 04:28 PM
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Originally Posted by ale76051
im looking to buy some longtube headers and y-pipe for my 96 formula. and was wondering does anyone know if you have to get the car retuned before it will run properly once the headers are on? thanks for any input
It would run w/o a tune but better with one Plus you will squeeze out a few more ponies with the tune.
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Old 10-23-2008, 04:30 PM
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and would i need to also get new O2 sensors for the front
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Old 10-23-2008, 04:34 PM
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Originally Posted by ale76051
and would i need to also get new O2 sensors for the front
Usually no..if you can get the stock ones off! And get a mail order tune, you'll be happy you did.
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Old 10-23-2008, 04:36 PM
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Originally Posted by ale76051
and would i need to also get new O2 sensors for the front
Not if they are in good shape
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Old 10-23-2008, 04:40 PM
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Look into getting a LT4 knock module too.
http://cgi.ebay.com/ebaymotors/93-97...mZ290269195545
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Old 10-23-2008, 07:05 PM
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how hard would that be to install
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Old 10-23-2008, 07:16 PM
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i am pretty sure they are very quick to change, doesn't take but 15 mins i believe
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Old 10-23-2008, 07:19 PM
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also pacesetter the way to go with their off road y-pipe?
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Old 10-23-2008, 07:32 PM
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Originally Posted by ale76051
how hard would that be to install
The LT4 module takes a few minutes, basically pull the PCM out with 4 bolts, take off the back cover and swap em. But if you're getting tuned the tuner can make your stock module work fine.

Originally Posted by ale76051
also pacesetter the way to go with their off road y-pipe?
Nothing wrong with them, the price is great and great bang for the $
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Old 10-23-2008, 07:36 PM
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You shouldn't. I ran without a tune and the car ran just fine. Car ran about .3 quicker too.
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Old 10-23-2008, 07:39 PM
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Originally Posted by ale76051
how hard would that be to install
The knock module?? Just put it in before you send the pcm off to get tuned. 2 screw on the back and throw it in...maybe 2 min install with the pcm out
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Old 10-23-2008, 07:40 PM
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Originally Posted by tscheu5452
You shouldn't. I ran without a tune and the car ran just fine. Car ran about .3 quicker too.
I seriously don't understand why people go to all the work to build a car and don't get a tune...plain retarded. Why not squeeze all the HP out you can and get the car to it's full potential. Don't listen to this guy this is a noob comment "you shouldn't" Great advise

Stealth, didn't we just go through this with some tool on here...lol
Last edited by Elliott's94Z; 10-23-2008 at 07:57 PM.
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