I have a 98ls block and I am going to fully build the bottom end with wiseco piston eagle rod's OEM bearing's with micro polished ls crank.I just need to know what kind of boost levels can the stock ls sleeve's handle if I am running a precision sc61 tuned with hondata s300.I am hoping to get close to 400hp daily driven.

 

You said you're going to fully build the bottom end without sleeving? Contradiction.

Anyway - I say with pistons and rods - 12psi.
But of course there are a lot of other factors in figuring out how muc boost you can handle.

 

I'd say up to 12-15 psi MAX. Why aren't you sleeving the block?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by broketuner-egb16a &raquo;</TD></TR><TR><TD CLASS="quote">I'd say up to 12-15 psi MAX. Why aren't you sleeving the block? </TD></TR></TABLE>

It is kind of expensive.I live in austin Tx and there aren't any reputable shop's around here to do the sleeve work atleast not that I know of.This is going to be my first bottom end build so if I am going to do it I guess I better do it right.

SO I SHOULD SLEEVE THE BLOCK?I know of course it will be much stronger but what kind of hp umbers and reliability is there with the stock sleeve's?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TheKINGPin &raquo;</TD></TR><TR><TD CLASS="quote">You said you're going to fully build the bottom end without sleeving? Contradiction.

Anyway - I say with pistons and rods - 12psi.
But of course there are a lot of other factors in figuring out how muc boost you can handle. </TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by darkblue1998ls &raquo;</TD></TR><TR><TD CLASS="quote">I have a 98ls block and I am going to fully build the bottom end with wiseco piston eagle rod's OEM bearing's with micro polished ls crank.I just need to know what kind of boost levels can the stock ls sleeve's handle if I am running a precision sc61 tuned with hondata s300.I am hoping to get close to 400hp daily driven.</TD></TR></TABLE>

....I almost didn't want to comment but I like the FI section sooooo. B18 series sleeves can handle quite a beating. They'll do 30+PSI as far as pressure goes, but the real question is HP and we've seen TONs of 450whp cars on stock sleeves. Although 500 and even 600whp has been done on stock sleeves, you might want to sleeve it anyway. but for 400whp no worries

 

Your block with rods and pistons can handle more than 10-12 psi. The stock block can take that.

I would shoot for horsepower over Psi, but if you aren't making the power you want I wouldn't push it past 18-20 for the street. There will be no point anyway.

 

15.5987964453654859876985563psi

Tuning is key.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Adi Radoncic &raquo;</TD></TR><TR><TD CLASS="quote">15.5987964453654859876985563psi

Tuning is key.</TD></TR></TABLE>

man boost gauges/map sensors/datalogging is getting pretty damn accurate these days.

 

one block doesent equal the next....

one sleeved block does though....

traction &gt; hp

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Adi Radoncic &raquo;</TD></TR><TR><TD CLASS="quote">15.5987964453654859876985563psi

Tuning is key.</TD></TR></TABLE>

https://honda-tech.com/zerothread?id=1496464 read that stock sleeved d series block 30psi put down 460

 

Like stated above...tuning plays a major role in how much boost your engine can take.

You can probably run 14+psi safely on a stock block LS....but like also stated above, not every motor is the same.
Check your compression before boosting. It has to be top shape, otherwise everything will just go downhill.
My cousin ran a B18C1 stock block with just a block guard at about 15psi for a year before he replaced the block for a fully built one.

 

Kingpin is a moron

 

Thank's for the comment's guy's but I am getting some mixed info.I guess I am going to just go with the stock sleeved build and if that f*%#s up then oh well build it better the next time.