sooooo....what do you guys think, what cracks them??? is it the amount of hp, tq, or amount of boost ran through them that cracks them. I think it's boost. what do you guys think? oh and i'm saying this with a very good tune on the car, so I hope I don't get alot of smart asses

 

search. it has been discussed many times before.

detonation and poor tuning cracks sleeves.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by non-VTEC &raquo;</TD></TR><TR><TD CLASS="quote">search. it has been discussed many times before.

detonation and poor tuning cracks sleeves.</TD></TR></TABLE>

maybe you didn't read too good......look "oh and i'm saying this with a very good tune on the car, so I hope I don't get alot of smart asses"

i've already searched, btw, everyone knows a poor tune will crack anything, even on cast sleeves.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by onefastek9 &raquo;</TD></TR><TR><TD CLASS="quote">

btw, everyone knows a poor tune will crack anything, even on cast sleeves. </TD></TR></TABLE>

if you know this why ask the question. boost and HP dont mean anything when cylinders fail. 98% of the time **** cracks/melt/breaks is from tuning.

 

THROW 30PSI TO STOCK SLEEVES AND SEE WHAT BREAKS OR CRACKS FIRST

 

OK, all i'm asking is simply easy.......would 25psi@500Whp crack a stock sleeves easyier or 18psi@500Whp. both with "PERFECT GOOD TUNES" or would it be the same because of power??

SO IN OTHER WORDS, if a stock sleeves cant hold boost 20+psi SAFE, but can make power, then I want to run 15psi@450whp+100shot....that's all i'm asking....THANK YOU.

 

Remember these engines were designed to work with in certain spec's based on what Honda wanted.

They were not designed to hold the forces we're putting them through.

Unless you had the block checked for cracks and pressure tested. You have no way to know if there wasn't a hairline crack from before.

Our D series with Darton sleeves was pressure tested and held 50psi.

B series guys are going more then that but I doubt there doing it on an untested block.

Was your block tested before it broke?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blue00Si &raquo;</TD></TR><TR><TD CLASS="quote">

THROW 30PSI TO STOCK SLEEVES AND SEE WHAT BREAKS OR CRACKS FIRST</TD></TR></TABLE>

30psi out of a 14b turbo.......or 30psi out of a gt40?......there is a diffrence......these PSI numbers everyone is obsessed with just goes to show how much more research everyone needs to do.

to answer the OP's question. 400whp seems to be the "limit" to stock b-series sleeves and that leaves you with some margin for tune error. there are lots of guys running 500+ 600+ on stock sleeves but they are gambling and it will be a matter of time before something lets go from stress. especially if their tune is not perfect.

if you search hard enough you will see guys running high boost on stock blocks/pistons/rods/head gaskets. they don't really make great power but the engine stays togeather.........why? their tune is good.......does the amount of boost matter........not really.

 

Right, I forgot about turbo size. Big difference between small and large.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by non-VTEC &raquo;</TD></TR><TR><TD CLASS="quote">
to answer the OP's question. 400whp seems to be the "limit" to stock b-series sleeves and that leaves you with some margin for tune error. there are lots of guys running 500+ 600+ on stock sleeves but they are gambling and it will be a matter of time before something lets go from stress. especially if their tune is not perfect.

if you search hard enough you will see guys running high boost on stock blocks/pistons/rods/head gaskets. they don't really make great power but the engine stays togeather.........why? their tune is good.......does the amount of boost matter........not really.
</TD></TR></TABLE>

THANK YOU.......THAT'S ALL I'VE WANTED TO KNOW... Id just didn't want to do 18psi and blow the sleeves because everyone is saying they don't hold past 14psi. i'm talking about a t4 t60

 

one more thing, do you guys think a b20 stock sleeves will hold as much as a b18a?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by onefastek9 &raquo;</TD></TR><TR><TD CLASS="quote">one more thing, do you guys think a b20 stock sleeves will hold as much as a b18a?</TD></TR></TABLE>

No.

 

how much differents?? thax

 

how much boost can the b20 take? or hp? without doing damage to the sleeves

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by onefastek9 &raquo;</TD></TR><TR><TD CLASS="quote">how much boost can the b20 take? or hp? without doing damage to the sleeves</TD></TR></TABLE>

honestly the 15-25 psi of boost doesn't come close to equaling the forces of the normal cylinder pressures under combustion

 

yes you are right, it's over 150+psi. id already did over 20psi, np. just so you guys know.

 

manifold pressure has nothing to do with what cracks sleeves...

high cylinder pressures caused by detonation is what crack sleeves...