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Power Estimation

This is a discussion on Power Estimation within the Internal Engine forums, part of the LSx Technical Help Section category; Hello. I had some work done to a stock 2002 TA. All the bolts with 1 3/4" edolbrock long tubes. ...

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    Member lingenfelter69's Avatar
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    Power Estimation

    Hello. I had some work done to a stock 2002 TA. All the bolts with 1 3/4" edolbrock long tubes. The heads were LPE 2.02's and a 281 high extreme energy comp cam. Drove it for a little while and the piston buggered up on me. I had it dynoed at 480hp and 458 torque and 403hp and 378torque rear wheel. I went to a 383 with the lunanti kit. How much do you think I may have gained by the added displacement. Also what is a rough guess on the quater mile. 6 speed with 4.10 strange and all suspenson up grades. Thank You this is my first post.

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    Senior Member JaycenK's Avatar
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    Displacement = torque most of the time but cam has a lot to do with that.

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    Slow'er'Ass Mr. Luos's Avatar
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    Tire?
    I assume it got a fresh tune with the new motor as well?

    Cam specs would be needed before I would even start to make a guess on the RWHP.

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    Member lingenfelter69's Avatar
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    stroker

    My suspension consists of umi lca,adj panrod bar and torque arm/off the transmisson. umi subframe connectors, koni adjustable drag shocks in the back. It has an electric exaust cuttout also.

    I have had it tuned after the install. The tires are 285 35 18 and 285 35 19 c6 zo6 wheels. My 17 by 9 speed line's are going to be plasma cut to 17 by 11 with m/t slicks. My cam is a Hydraulic roller high rpm street strip compcam.
    2200-7200 rpm
    0.006 valve timing
    112 lobe center angle
    intake centerline 110

    valve lash HYD EXAUST
    Duration 281 283
    duration at .050" lift 228 230
    valve lift 0.571 0.573
    lobe lift 0.336 0.337
    open closed
    intake 31 btdc 71 abdc
    exaust 76 bbdc 28 atdc
    valve timing at 0.006"

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    Member lingenfelter69's Avatar
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    stroker

    Also i believe that my compression is 11:1 and I have a 1.70 ratio. My mechanic had said that I did not have to go any bigger because of my cam.

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    Member lingenfelter69's Avatar
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    The valves hit the pistons

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    Member Rk ws6's Avatar
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    ouch.... just wondering i had just got the same cam and 7.400 pushrods but i am still on stock heads

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    Member Rk ws6's Avatar
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    Id say your high 10s bound but due to your tires i dont picture a good 60 ft unless there drag radials hopefully your not blowing the tires off down the track

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by lingenfelter69 View Post
    The valves hit the pistons
    How? Over rev?




    That is a baby cam for the 383....
    228/230 571/573 112

    What gears? What rearend?

    Quote Originally Posted by Rk ws6 View Post
    Id say your high 10s bound but due to your tires i dont picture a good 60 ft unless there drag radials hopefully your not blowing the tires off down the track
    Not a chance.
    Will be an upper 11 second car with 1.7 or so short times in my opinion.

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    Member lingenfelter69's Avatar
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    4.10 with a strange 12 bolt. I was racing a viper and I was pulling on em, then I missed a shift and over reved :-(

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    Slow'er'Ass Mr. Luos's Avatar
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    Gotcha.
    Solid rear, good gears for that set-up.

    That cam is a baby for that motor though. Great powerband, I bet it is torquey down low. But upper RPM power is gonna suffer. 383 cubes want that air...and at that duration it isn't getting enough.

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    Member lingenfelter69's Avatar
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    What kind of cam do you think would more suit it? Also is it true that cam changes are very easy on ls1's?

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    Slow'er'Ass Mr. Luos's Avatar
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    Wouldn't say they are VERY easy.

    But with those cubes, an MS3/MS4 would be solid. I don't like those cams for a stock cube motor, but in strokers they work nicely.

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    cutting and welding mark21742's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    Wouldn't say they are VERY easy.

    But with those cubes, an MS3/MS4 would be solid. I don't like those cams for a stock cube motor, but in strokers they work nicely.
    how about Trick Flow's 238/242 .595/.595 112lsa for the 383.
    I know its on the large side, but this is the cam I'm going with in my stock cube 346

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    cutting and welding mark21742's Avatar
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    Quote Originally Posted by lingenfelter69 View Post
    What kind of cam do you think would more suit it? Also is it true that cam changes are very easy on ls1's?
    if you have a good pully/gear puller, a cam swap is a good saturday project

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by mark21742 View Post
    how about Trick Flow's 238/242 .595/.595 112lsa for the 383.
    I know its on the large side, but this is the cam I'm going with in my stock cube 346
    It all depends on the usage or the car.

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    cutting and welding mark21742's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    It all depends on the usage or the car.
    04a4 GTO with 3,800 stall I'm ready for a bitchy DD

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by mark21742 View Post
    04a4 GTO with 3,800 stall I'm ready for a bitchy DD
    That it might be.

    Good tune and it should be okay though. Might be a little much if it was my DD though.
    I would be looking at the TSP 228R for a DD.

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    A buddy with a 383 running a MS4, PRC 5.3's, 90/90 and all bolton's runs 10.9's. He could DD that car if he wanted too....

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    Member lingenfelter69's Avatar
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    How would 215cc trickflow heads and a ms4 cam be for this setup? Mr Luos said eariler that displacement increases usually mean more torque, (depending on the cam) how much flywheel power would I be running?. 480hp and 458 torque before getting stroked, so maybe 500hp and 500 torque?

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