Tuning a Supercharged LT1
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8th Gear
Joined: Sep 2004
Posts: 8
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Tuning a Supercharged LT1
I am looking for advice for maintenance on my new 94 LT1 w/ the 6 speed transmission and a vortech supercharger. The motor is stock. The exhaust is stock with the exception of Flowmaster mufflers. How or what do I do to keep it in top performing condition? I have had other Vets and always do my own maintenance and light repairs. The car has less than 60K on it and the waterpump, distributor, plugs and wires have recently been replaced. Do I set the timing the same as with a stock motor? What else do I need to know about a SC motor?
Thanks for the help.
Thanks for the help.
Pro
Joined: Nov 1999
Posts: 623
Likes: 0
From: Toronto, ON, Canada
There is lot's of stuff to learn and I can't answer all questions in one post. Do some searches and read, read, read.
For stock motor watch your boost level. You don't want more than 6-8psi on stock motor.
For timing be careful. You'll need to take away 1-1.5 degrees of timing for evey PSI of boost as a generalization. (i.e. 8 degree retard for 6psi is good figure)
Watch you're fuel feed. You need to run air fuel ratios around 11.5-11.9 for forced induction motors. Stock Vettes run closer to 13.0.
Be carefull, you don't want to just bolt on a blower and start beating on it.
For stock motor watch your boost level. You don't want more than 6-8psi on stock motor.
For timing be careful. You'll need to take away 1-1.5 degrees of timing for evey PSI of boost as a generalization. (i.e. 8 degree retard for 6psi is good figure)
Watch you're fuel feed. You need to run air fuel ratios around 11.5-11.9 for forced induction motors. Stock Vettes run closer to 13.0.
Be carefull, you don't want to just bolt on a blower and start beating on it.
Race Director
Joined: Feb 2002
Posts: 11,268
Likes: 14
From: Honolulu, HI
Originally Posted by XTwinTurbo
For timing be careful. You'll need to take away 1-1.5 degrees of timing for evey PSI of boost as a generalization. (i.e. 8 degree retard for 6psi is good figure)
Having an MSD or other aftermarket high discharge ignition with a timing controller is a good idea. I'm pulling 1 degree per pound of boost.
I have an MSD BTM, but there are other manufacturers also.
