could it be possible and reliable a 82mm b18c1 stock sleeved with block guard, forged internal and microtech ecm , vp fuel make 400whp with conservative timing......p.s i know it would be safe in a sleeved block but im trying to proof wrong some engine builders here in P.R.

 

at 400 whp on race gas..yeah..as long as you have a good tunner..

 

Im 81.5mm making over 500whp on stock sleeves with an A/F of 10.3 which is saftely rich so 82mm should definately be capable of 400 but its all in the tune..Make sure you have someone real knowledgable tune it..

 

If there was a core shift, you could hit water at 82mm. I've seen it happen.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl &raquo;</TD></TR><TR><TD CLASS="quote">If there was a core shift, you could hit water at 82mm. I've seen it happen. </TD></TR></TABLE>

Can you explain that Earl? Thanks......

 

dont understand earl..

 

Earl means that if in the casting process of the block the factory liners might have shifted from where they are supposed to be in the blueprints....so when you bore it to 82mm you may have a wall thickness thats really thin on one side and thick on the other....this is the chance you take even with boosting at a 81mm bore also....I have made close to 500whp on a D-series on stock sleeves and seen a similiar built motor not take 300whp with the same tune crack a sleeve....

Howard

But if the block was overbored with a boring bar that mounts to the deck and off the center of the existing sleeve....you may get away with it...but this is not a recommended procedure for the honda block....

 

so if the sleeve crack can i reused the internal for another engine build?

 

A friend of mine that own IMPORT SOURCE PErformance here in Ga made 630hp on a 81mm bore, stock sleeves!!!
He made 630 with open Dp and it made 593 with exaust system on the car!!!

Basic setup.
Stock sleeves
9.1 Cp piston
Eagle rods

t3/t67HO turbo

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by danilogsr &raquo;</TD></TR><TR><TD CLASS="quote">so if the sleeve crack can i reused the internal for another engine build? </TD></TR></TABLE>

you should be able to use the rods but the pistons would probably get damaged i just had a customer send some in that he only had 300 miles on before he cracked a stock sleeve and the pistons were no good

 

I would like earl to chime in and explain it himself if possible. I can't imagine that a Honda block could be off by so much (let alone any block) that boring it from 81mm to 82mm ( only 0.0393") could make the sleeve to thin to be used.

I am not a top engine builder by any means, but I would guess (off the top of my head) that the sleeves are about .375" thick at the top on a b-series. I would think if the sleeves moved more than just .001"-.005" maybe less, you would experiance problems (crank alignment, piston/wall clearance, thrust shims...etc..)?

I may be looking at this wrong, but that's why I want a better explination.

Also, to answer the original question I have always been told not to go any bigger than needed on stock sleeves. The most you usually hear is 81.5mm. Some even say to only go to 81.25mm. OTOH, I can't see 82mm/400whp being a problem when people have pushed 600+ whp on 81.5mm blocks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl &raquo;</TD></TR><TR><TD CLASS="quote">If there was a core shift, you could hit water at 82mm. I've seen it happen. </TD></TR></TABLE>

i have seen this to

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by simike &raquo;</TD></TR><TR><TD CLASS="quote">.375" thick at the top on a b-series..</TD></TR></TABLE>


What? thats almost 3/8ths of an inch man! The sleeves are lucky to be .145".

If during the aluminum pour the cast in liner shifts .070" or more you are screwed even if you leave it stock bore....

Yeah some people have made big power on stock sleeves, probably because they got lucky and have a very nice casting that has the liners cast-in the alum perfectly on center....but you take the chance

This is why alot of top engine builders of V8's have sonic testers so they can pick and choose production made blocks or to know when to sleeve a block before they build a race motor....

I have a sonic tester on the way...for more purposes than listed above....

Howard

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl &raquo;</TD></TR><TR><TD CLASS="quote">If there was a core shift, you could hit water at 82mm. I've seen it happen. </TD></TR></TABLE>


I wouldnt say water...Id say Aluminum, but its the same thing....its very bad

 

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


I wouldnt say water...Id say Aluminum, but its the same thing....its very bad</TD></TR></TABLE>

Ok, that makes a little more sense. I kept thinking to myself if the machine shop was going to bore the cylinder and hit "water" you would be able to see the problem before you start the process it would be so far off.

When I said .375 thick I meant including the aluminum liner (meaning you would actually hit water, not just aluminum). I believe you when you say you can hit aluminum (much more believable), but I am still surprised they can be off that much.

 

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

Ok, that makes a little more sense. I kept thinking to myself if the machine shop was going to bore the cylinder and hit "water" you would be able to see the problem before you start the process it would be so far off.

When I said .375 thick I meant including the aluminum liner (meaning you would actually hit water, not just aluminum). I believe you when you say you can hit aluminum (much more believable), but I am still surprised they can be off that much.</TD></TR></TABLE>
Yeah that is REALLY far off.