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Max RPM on stock shortblock

This is a discussion on Max RPM on stock shortblock within the Internal Engine forums, part of the LSx Technical Help Section category; OK I have a MS3 Cam (came in today woot!) Comp 921's, hardened pushrods (TSP), Titanuim retainers, Hardened seats, ported ...

  1. #1
    Senior Member slims00ls1z28's Avatar
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    2005 GTO M6 Black
    2000 Z28 A4 Red

    Max RPM on stock shortblock

    OK I have a MS3 Cam (came in today woot!) Comp 921's, hardened pushrods (TSP), Titanuim retainers, Hardened seats, ported LS6 oil pump, LS2 Timing set. I know that the MS3 will put the powerband much higher than what it is currently. I will start installing everything next week hopefully and will get it tuned shortly afterwards. I have no clue as to what the curve is going to look like or where max power is at but if it is over 6500 should I be looking into ARP rod bolts? I'm sure my valvetrain is safe given I bought the kit for that cam but now I'm worried about the bottom end. What is the max recommended rpms that would be considered "safe" on my bottom end?

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    Member 2001hawk's Avatar
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    Black & Black
    2001 Firehawk & 2002 WS-6

    The bottom end should be safe to just over 7 grand. However since you didn't say anything about solid lifters I wouldn't go past 6800 RPMs.

  3. #3
    Senior Member slims00ls1z28's Avatar
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    2005 GTO M6 Black
    2000 Z28 A4 Red

    Hmm solid lifters at 7 or wil LS7's do?

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    Member TACE02's Avatar
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    ASC #753
    2002 Collector's Edition

    My Rev limiter is set to 6700 running that cam cause it starts losing power right around 6500 (gives me a couple hundred RPMs to kinda play with) bottom end is fine. And good to see you got the oil pump. someone advised me I wouldn't need it, and right at 1 year after the H/C mod it took a shit. .

  5. #5
    Junior Member josh110781's Avatar
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    red
    2000 trans am WS6

    i have the same cam and it starts making its power at 4700 and peaked at 6300. once it hits 4700 its almost a flat line to 6300. maybe picked up around 15 more horsepower from 4700-6300.
    slp lid,maf and smooth bellow. ls6 intake, cnc ported and polished ls6 heads with competition valve job. cam 237,242 .603,.609 113 lsa. pacesetter longtube headers and off road y-pipe. magnaflow catback
    dyno numbers on a mustang dyno
    394 rwhp @ 6300 RPM
    345.7 rwtq @ 4800 RPM

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