I'm gonna be doing a bore (NO SLEEVE) on my b18c5. I was planning on going 81.25, but can i go 81.5, or 82.00 bore, without sleeving my block?

This will be on a b18c5, CR around 11.5-possibly 12.0, with forged internals and a 75 shot, and a built head.. it won't be sleeved. Thanks!

 

82mm is the most you can bore out a stock sleeve to be on the safe side. I've been running 82mm bore for over two years, no problems but that's N/A not F/I.

 

So is 82mm ok then?

Like i said, this will be my setup.

b18c5 block
forged pistons yielding 11.5-possible 12.0 compression ratio
eagle rods
all studs pretty much ARP

with a built b16 head and a 75 shot of nitrous.

Will the 82 be okay with nitrous, or should i just go 25 over so if i have detonation i have a greater chance of "survival" ... ? Please post up!

 

Sleeve it if you're running nitrous and high compression etc together.

 

Thing is, i'm not going to sleeve it. So should i just stick with a .25 over bore?

 

If your definitely not going to sleeve it,I would bore it as little as possible so your sleeves will be thicker/stronger...
Also if you ever blow it up and need to bore out the damage,you will have more material to work with...

See if the piston manufacturer your using has 81.25mm and go with that.. If not then you may have to go to 81.50mm...

Good luck on the high compression w/ nitrous. This is something ive always wanted to try but dont have the ***** for yet

 

THanks! I have a nitrous kit laying around, and since i'm building my block up, i might as well go all high compression and use the nitrous, since i'm not gonna go turbo!

This is all be tuned on Hondata with nitrous control and all that, so timing will be perfect when i spray, so that will bring the chances of detonating down, i just need to find the best gas around here!


Does anyone else have any comments? I really wanna her some other peoples opinions!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Odiedogcx &raquo;</TD></TR><TR><TD CLASS="quote"> so timing will be perfect when i spray, so that will bring the chances of detonating down, i just need to find the best gas around here!


Does anyone else have any comments? I really wanna her some other peoples opinions!</TD></TR></TABLE>

well, detonation is not the only enemy ofthin cyl. walls, pure cylinder pressure can get the best of this cyl. walls too- cyl. pressure like that induced from juice and high CR.

IMO, go .5 over MAX, and properly install a well-designed blockguard if you insist on not sleeving.

 

oh, and trade that dry kit for a wet one.

 

wanna hear something funny some dousche at school told me you can run 87mm bore on a stock B18B sleeve on 12:5:1 c/r and rev to 9000rpm on a daily driver. he's ****** retarded you could for maybe a day to a week.

 

I'm going 81.5 mm, 12.5:1 compression, Endyn Rollerwave pistons

no block guard .. no sleeves

 

stud the block?

 

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

possibly

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Odiedogcx &raquo;</TD></TR><TR><TD CLASS="quote">I'm going 81.5 mm, 12.5:1 compression, Endyn Rollerwave pistons

no block guard .. no sleeves </TD></TR></TABLE>

why? why not atleast get a block guard? a silly gamble, IMO


studding the block is passe, just get a properly designed block guard...

 

im going with an 82mm bore on a stock b16. brent from PFI has a 83mm bore stock sleeve ls/vtec that has lasted years. he spoke to me briefly about it, ill see if i can get some more info from him, or get him to post it all himself.
X-eric-X

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by X-cement-filled-EG-X &raquo;</TD></TR><TR><TD CLASS="quote">im going with an 82mm bore on a stock b16. brent from PFI has a 83mm bore stock sleeve ls/vtec that has lasted years. he spoke to me briefly about it, ill see if i can get some more info from him, or get him to post it all himself.
X-eric-X</TD></TR></TABLE>
but there have been countless people who have cracked moderately overbored stock sleeves, it takes only a little pinging/ too much cylinder pressure to crack a stock cylinder liner that is overbored, especially when you hit over .5mm...hence the advent of the block guard. I just dont see it being worth the risk vs. simply installing a properly designed 125$ blockguard...

there is a reason honda offers OE pistons in overbore up to a limit of .5

BTW cement-filled, ask pfi when they are going to get onboard for the Apexi Power Excel program...

 

I'm only going .5 over, i should probably be fine with that ... right? I've also heard posting the block is better then using a block guard.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Odiedogcx &raquo;</TD></TR><TR><TD CLASS="quote">I'm only going .5 over, i should probably be fine with that ... right? I've also heard posting the block is better then using a block guard.</TD></TR></TABLE>

.5, yeah, you'll be ok if its tuned properly, no doubt.

if someone prefers posting, it might be cuz there are no coolant flow issues with posting---something that alot of blockguards had early on...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by builthatch &raquo;</TD></TR><TR><TD CLASS="quote">
BTW cement-filled, ask pfi when they are going to get onboard for the Apexi Power Excel program...</TD></TR></TABLE>
will do, ill be going to SEMA with them.
X-eric-X