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new motor question

This is a discussion on new motor question within the General Help forums, part of the LSx Technical Help Section category; I live about 30 min from a drag strip...

  1. #21
    Junior Member
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    99 trans am

    I live about 30 min from a drag strip

  2. #22
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    pajeff02's Avatar
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    Black & Blue
    '02 WS.6 / '07 Suburban

    That's a great way to tell what your car is doing. You need a good launch without a lot of tire spin and then post pics of your time slips. Also, if the track has scales, get a weight reading with you in the driver seat.

  3. #23
    Member RONS98TA's Avatar
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    1998 PONTIAC TA

    With the work that has been done to your engine, that just seems WAY to low of a h/p number. Did you check fuel pressure? Maybe in the higher rpm range the fuel pressure drops off. Clogged air filter or clogged fuel filter? Again, just some idea's. My stock 1998 auto TA put down 330 hp to the wheels. I don't remember what dyno it was cause this was well over 13 years ago. LOL. Its unfortunate you didn't get on the dyno BEFORE the engine change, just for a comparison.

  4. #24
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    99 trans am

    I changed the fuel filter before the dyno pull and I haven't checked fuel pressure

  5. #25
    Moderator Firebirdjones's Avatar
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    Any mention on the engine of what the compression was supposed to be? A little 346 with 317's isn't going to pump too much compression unless those things were milled pretty small. That cam, with that much duration and a 115 LSA that's only advanced 2 degrees is going to run best with at least 10.5:1 or more.

    We can keep guessing like this without alot of details But I kind of side with Jeff, I'd get to a track and have some fun with the car and see what kind of MPH it puts up.

  6. #26
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    99 trans am

    After I get everything put on I plan on going to the traxk. Just waiting on them to open up and with all this rain where I live its probably flooded to were they won't be open

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