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how much hp can a stock bottom end take safely?

This is a discussion on how much hp can a stock bottom end take safely? within the Internal Engine forums, part of the LSx Technical Help Section category; can i accomplish 525 rwhp on stock bottom end?pistons,rods, crank,etc?...

  1. #1
    Member blackls1ta's Avatar
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    black
    2000 ws.6 m6

    how much hp can a stock bottom end take safely?

    can i accomplish 525 rwhp on stock bottom end?pistons,rods, crank,etc?

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
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    Yes.

    Tune plays a HUGE role in that.

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    Member blackls1ta's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    Yes.

    Tune plays a HUGE role in that.
    how much do you think this will cost to run 525 hp?

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    Member blackls1ta's Avatar
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    black
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    5k?

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    Slow'er'Ass Mr. Luos's Avatar
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    Depends on how you set it up.
    Probably more than $5K though.

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    Member blackls1ta's Avatar
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    black
    2000 ws.6 m6

    id like to just do heads ,cam

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    86 Buick Grand National
    02 WS6-M6 407 RWHP

    Well you won't hit 525 like that 450-480 is the norm

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    Member blackls1ta's Avatar
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    Quote Originally Posted by sfletch2000 View Post
    Well you won't hit 525 like that 450-480 is the norm
    that wud work with my budget,450-480 not bad

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    Slow'er'Ass Mr. Luos's Avatar
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    Heads, cam, and bolt-ons tend to make 425 RWHP.

  10. #10
    Member sfletch2000's Avatar
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    86 Buick Grand National
    02 WS6-M6 407 RWHP

    Check out my sig i spent about 2500 for parts roughly, i'm gonna do heads next -PRC LS6 Heads, Gaskets, Head bolts, and another dyno tune and that will run me about another 1600 so that kinda gives you an idea but that all depends if you decide to go with the budget stuff or the expesive stuff.

    Well Mr. Lous my combo is pretty basic and i should hit 450 with heads and i have a pretty mild cam compared to most. But for auto i'd say 425 is expected.
    Pacesetter Headers- ORY
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    407 RWHP 377 Ft./lbs.

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    if u want that power check out some cam only 150 shot setups with a bad ass tune and ur set

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    member since may 2000 nhraformula's Avatar
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    well you ask how much power can it take safely, i wouldnt go past 425 or so personally on a stock bottom end
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

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    Member blackls1ta's Avatar
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    black
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    i was thinkin 225 mongoose heads with comp cam xtrreme energy 265

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    Jesus died to save you! Killer_bluebird's Avatar
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    Quote Originally Posted by blackls1ta View Post
    i was thinkin 225 mongoose heads with comp cam xtrreme energy 265
    Small Bore 225 will not work that great on a stock cubed LS1 imho. Low end will suck compared to other combos. You are better of with a Trickflow 215cc set of heads and a healthy cam in the 239-240 range. Maybe something like Patrick's cam (on LS1Tech) or a custom ground MS4 on a 110 LSA+4 should put nice number with good torque. You should check P2V but unshaved 215's have better P2V than stock due to the 15* valve angle, so you may not need to flycut. That should net you around 460-470rwhp on a M6 with all the other bolt ons and 480+ with a ported 90/90 combo. That is how Vengeance racing have been cranking out NA cars in the 480-510rwhp range.
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    Member danziger's Avatar
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    I subjected my stock-bottom to 576rwhp/590rwtq with heads/cam/100shot and it lasted for a few years before pushing a head-gasket. These engines are pretty tough... Anyways, 500+rwhp is not a cheap or easy proposition for a heads/cam car. Most GOOD set-ups are in the 450rwhp range. Mine was GOOD for 2002 and made 436/420 with a nitrous cam. Of course that was before AFR, Dart, ETP, etc heads, but you get the idea. When I pushed the head-gasket, I decided to go with a forged 383, but my internals looked fine, so I'd honestly recommend heads/cam/small shot to achieve your goals.

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