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Pontiac >> A BLAST FROM THE PAST >> Firebird >> 4th Generation >> ok

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ok - 6/15/2007 12:06:01 PM

mit664

Posts: 3
Joined: 5/24/2007
Status: offline

im a first time owner of a firebird and i love it so far....but i do wanna tweak it alot to get it to be a whole lot faster....help???

Post #: 1

Here's a starting point - 7/31/2007 3:29:44 PM

OEM TA

Posts: 17
Joined: 2/15/2007
From: A little bit south of Sacramento, CA.
Status: offline

First things to do are to get the engine to breathe better. K&N type air filter on cold air induction, headers, low restriction cat, and 3" catback exhaust system. That will burn up about $1200-$1500. Install an underdrive pulley (worth aprox 5-10 HP) That should run about $100. Check with GM dealer and replace the LT-1 knock module with the LT-4 knock module (plug-in unit located in the back of the PCM) (it has less sensitivity to noise - false knock will cause PCM to retard timing) this often occurs with the addition of headers and will occur with the addition of roller rockers.) Its about $45. Then have the car tuned by someone with a load-bearing dyno, make sure they do wide-band oxygen sensing - not just reading the voltages from your O2 sensors. This will eat up around $450. Then start saving you money for head work, cam and larger throttle body (52mm is fine up to about 550 - 600 HP - 58 mm will be overkill and waste of money).
This link has some good basic information for new F-body folks http://www.ls1lt1.com/forum/showthread.php?t=209
Here are some 'free-mods' good for a few horses here and there. http://www.ls1lt1.com/forum/faq.php?faq=lt1faq#faq_lt1_freemods
I personally do not recommend de-screening the MAF (some folks have idle / throttle response issues) nor 'gutting' the CAT (get a low restriction one - don't be a cheapskate or risk not passing emissions testing.

_____________________________

1995 LT1 - tweaked enough to get around most.

(in reply to mit664)

Post #: 2