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WHP limit ??

This is a discussion on WHP limit ?? within the Internal Engine forums, part of the LSx Technical Help Section category; 383 Ls1, callies compstar 4.00 crank, compstar H beam rods, arp 2000 rodbolts, wiseco forged pistons, arp headstuds & mainstuds. ...

  1. #1
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    2001 camaro ss

    WHP limit ??

    383 Ls1, callies compstar 4.00 crank, compstar H beam rods, arp 2000 rodbolts, wiseco forged pistons, arp headstuds & mainstuds. Ls9 head gaskets, clevite main and rod bearings, Boosted & wont be reving past 6800 rpms.

    Whats going to let go first, and at what WHP ? Or whats the max whp that this setup can handle SAFELY?
    Last edited by 2NDSLPSS; 01-12-2012 at 01:28 AM.

  2. #2
    Member 383ls6's Avatar
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    2002 z/28

    I have a very similar setup that yielded 440rwhp/420rwtq and can spin it to 7000 rpms and hold it there unboosted though.

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    Sold: LS1 '85 El Camino ls1camino's Avatar
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    2000 Grand Prix GTP
    2000 Trans Am WS6 M6

    Naturally Aspirated...you won't touch the limit of the internals.

    I have the exact same brand internals in my 427 LS3, and the rods are the lowest rated part at about 900hp. If you go forced induction, I would be worried about the block long before the internals.

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    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    2008 Hummer H3

    If there's a 10-bolt rear under it that may go first..

    Stock 3800's can break them..
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    Senior Member cpop98ws6's Avatar
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    98 WS6/04 Sierra Dmax

    I have the same bottom end in my motor, put down 430whp and 428 wtq with stock heads. My rear let go in September. I now have a strange s60 under the car.
    Callies 383, Trick Flow 225, Rapid Motorsports Dominatior 2 X cam, ls6 ported oil pump,42lb injectors, FAST 92/92 , ASP underdrive pully, eletric water pump, Pacesetter LT's, Pacesetter ORY, Magnaflow catback, e-cutout, Yank SS 3600, Performabuilt stage 2 4l60e, Strange S60 ,4.10s, Detroit Truetrac, (UMI) - Adj. LCA, Adj. tunnel mount torque arm, Adj. panhard bar, Drag bar, subframe conectors, shock tower brace. 465rwhp-438rwtq 11.09@119.90.

  6. #6
    Former Mopar Man 2002ssslp's Avatar
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    As far as the enging goes I would say the bearings will let go first but that is with the spray. Other wise it is a strong combo. The other parts of the drivetrain will suffer first. 10 bolt reat, U-Joints and tranny components. I will say 430 rwhp is in the range without spray.

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    Everything in the driveline will be replaced. Im going to go with a built 4l80e, better driveshaft& yokes, a 12 bolt, also better heads, dual walbros,60# injectors, FAST, CNC'd and heads .so im mostly worried about the bottomn end. I will be running a D1sc and want to put down 650 on the pumpgas street tune

    will I be stressing the the rods at all ? My invoice from tsp said they are 900 hp rods. Are they talking about at the flywheel ??? If so the 700+whp race gas tune I had in mind may be out the window w these rods. . .

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    Sold: LS1 '85 El Camino ls1camino's Avatar
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    Quote Originally Posted by 2NDSLPSS View Post
    Everything in the driveline will be replaced. Im going to go with a built 4l80e, better driveshaft& yokes, a 12 bolt, also better heads, dual walbros,60# injectors, FAST, CNC'd and heads .so im mostly worried about the bottomn end. I will be running a D1sc and want to put down 650 on the pumpgas street tune

    will I be stressing the the rods at all ? My invoice from tsp said they are 900 hp rods. Are they talking about at the flywheel ??? If so the 700+whp race gas tune I had in mind may be out the window w these rods. . .
    I believe that is crank, but I'm sure they're rated for more hp, just not reported, so people stop short of the limit.

    Have you ordered the motor yet? If not, why not upgrade the rods?

  9. #9
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    I have an ls1 engine out of my 00' SS. I ordered said rotating assembly because rep at tsp told me he would have no problem pushing this bottom end to 1000 whp but then it comes in with an invoice that says rods. . . 900hp I started researching. ( wrong order, I know !)


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