lsvtechatch92

i have a piston and rod lsvtec with valve springs and retainers on stock sleeves...
it made 408and 306 on 4th gear pull on pump gas...and after dyno it started to misfire...it has a hairline crack in number 3 cylinder... is 400 hp to much for stock sleeves and pump gas...i have seen it on many other cars.. or do you think it was just a freak accident...what numbers do you guys see with pump gas and stock sleeves...
i found gsr block forcheap so i am putting my ls crank and what not in the gsr block... hopefully it will not crack another sleeve... if it does i will be forced to sleeve the next one

0morgan@synapse motorsport

deck height is the same. gsr block with the ls crank is great, you get the gsr girdle, and dont need to do an ls vtec conversion.

as long as the car is tuned properly 400whp should not be an issue on stock sleeves.

Bseriescivic5

My buddy made 594 with a t67 on stock sleeves, but then cracked 3/4 cylinder walls when the boost spiked to 34psi. People have made 600 with stock sleeves but none of these motors lasted very long at such a power level. 400 should be fine with stock sleeves.

fullracegsr

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bseriescivic5 &raquo;</TD></TR><TR><TD CLASS="quote"> People have made 600 with stock sleeves but none of these motors lasted very long at such a power level. 400 should be fine with stock sleeves.</TD></TR></TABLE>

incorrect statement.. mine made 610whp for 3 full seasons before i pulled it apart and found some hairline cracks... it depends on how conservative you tune it...

JDogg

it depends on the condition of the block and what kind of abuse it has seen before

if it has ever been hydrolocked or detonated on before that will weaken the sleeve and even if you have a perfect tune the sleeves will crack at that power level.

i had a car come in about 2 months ago, the guy did new OEM pistons and rods in the block after he hydrolocked it, the sleeve split with only 240hp. for most "customers" 350 is where i stop on stock sleeves, just b/c you never know and anything over that is pushing it IMHO

Bseriescivic5

Sorry, it was ment for a general statement...... Rule of thumb, anything over 600 becomes extremely volitile.

JDogg

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bseriescivic5 &raquo;</TD></TR><TR><TD CLASS="quote">Sorry, it was ment for a general statement...... Rule of thumb, anything over 600 becomes extremely volitile.</TD></TR></TABLE>

the "volitile" level is much lower than that...

tony1

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">

the "volitile" level is much lower than that...</TD></TR></TABLE>

zexxbo

dont do your dyno pulls in 4th gear next time either..

alpha

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">it depends on the condition of the block and what kind of abuse it has seen before

if it has ever been hydrolocked or detonated on before that will weaken the sleeve and even if you have a perfect tune the sleeves will crack at that power level.

i had a car come in about 2 months ago, the guy did new OEM pistons and rods in the block after he hydrolocked it, the sleeve split with only 240hp. for most "customers" 350 is where i stop on stock sleeves, just b/c you never know and anything over that is pushing it IMHO</TD></TR></TABLE>

Couldnt have said it better

fullracegsr

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">it depends on the condition of the block and what kind of abuse it has seen before
</TD></TR></TABLE>

the block i used was my friends ls block i took out of the original car... it had 180k+ miles on it and for the year he had the car(bought it used) he never changed the oil just kept added to it.. all i did was bore it and drop pistons and rods in... guess i got lucky

underpressure02

I made 497 last year on a totally stock ls/vtec motor. Last race of the season I bent 4 valves. Got 4 used valves and retuned it and made 505 anything more I got valve float. But the motor is still holding together. I ran race fuel not pump though.

Joseph Davis

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fullracegsr &raquo;</TD></TR><TR><TD CLASS="quote">the block i used was my friends ls block i took out of the original car... it had 180k+ miles on it and for the year he had the car(bought it used) he never changed the oil just kept added to it.. all i did was bore it and drop pistons and rods in... guess i got lucky </TD></TR></TABLE>

I think manufacturing tolerances have a good bit to do with it as well.