94 caprice engine swap.. HELP PLEASE
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94 caprice engine swap.. HELP PLEASE I have a original stock 1994 chevy caprice. With the 4.3 l99.. I found a 5.7 lt1 at junk yard for 500$. My problem is I keep hearing I would have to reflash computer to run this 5.7 I asked a PCM guy that does it he told me its a 94 don't bother it. Its not rewritable. So what do I do. buy new computer that goes to 5.7 or find one out a 5.7 caprice. What all do I need to do. Because I know the gear ratios are different to from the l99 caprice and 5.7 caprice.. WHATS THE BEST WAY TO GO HELP PLEASE.
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What is the donor?
You got the injectors too right?
The civilian L99 cars usually got the 7.5" axle which a stock LT1 can break, if that is what your car has consider going back for the donor axle and driveshaft if it was a sedan, can talk more on that once you answer the what was the donor question.
The L99 tranny had a smaller boost valve and some other small weaknesses, a Transgo kit can help.
The stock L99 fuel pump is smaller capacity than LT1 but should still feed a stock LT1.
This really is pretty straight forward.
Been a long time and the info isn't coming to me as spontaneously as I hoped, ask questions and I will try and answer them quickly.
You got the injectors too right?
The civilian L99 cars usually got the 7.5" axle which a stock LT1 can break, if that is what your car has consider going back for the donor axle and driveshaft if it was a sedan, can talk more on that once you answer the what was the donor question.
The L99 tranny had a smaller boost valve and some other small weaknesses, a Transgo kit can help.
The stock L99 fuel pump is smaller capacity than LT1 but should still feed a stock LT1.
This really is pretty straight forward.
Been a long time and the info isn't coming to me as spontaneously as I hoped, ask questions and I will try and answer them quickly.
Thread Starter
Registered User
Joined: Jan 2015
Posts: 4
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What is the donor?
You got the injectors too right?
The civilian L99 cars usually got the 7.5" axle which a stock LT1 can break, if that is what your car has consider going back for the donor axle and driveshaft if it was a sedan, can talk more on that once you answer the what was the donor question.
The L99 tranny had a smaller boost valve and some other small weaknesses, a Transgo kit can help.
The stock L99 fuel pump is smaller capacity than LT1 but should still feed a stock LT1.
This really is pretty straight forward.
Been a long time and the info isn't coming to me as spontaneously as I hoped, ask questions and I will try and answer them quickly.
You got the injectors too right?
The civilian L99 cars usually got the 7.5" axle which a stock LT1 can break, if that is what your car has consider going back for the donor axle and driveshaft if it was a sedan, can talk more on that once you answer the what was the donor question.
The L99 tranny had a smaller boost valve and some other small weaknesses, a Transgo kit can help.
The stock L99 fuel pump is smaller capacity than LT1 but should still feed a stock LT1.
This really is pretty straight forward.
Been a long time and the info isn't coming to me as spontaneously as I hoped, ask questions and I will try and answer them quickly.
And my car is a stock 94 caprice stock l99
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I basically want to build this car over time. What you think I need to start with. Before going with lt1 .. What would be best options to get a faster car...
