hello ht memebers, just a brief question,,...will Boring a b20 to 86Mm All MotoR be SafE? or will the sleeves CrAcK?....im planning to make it 86mm bore.w/crower 95 mm crank..ive seen 85.5mm bore wit 95 mm crank done but didnt get to ask the kid of he sleeved it?...thanks.

 

sleeve it, me personally wouldnt go more than 84.5 on it, im sure others would agree, they are weak and thin enough, why make them thinner?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dual Cam Racing &raquo;</TD></TR><TR><TD CLASS="quote">sleeve it, me personally wouldnt go more than 84.5 on it, im sure others would agree, they are weak and thin enough, why make them thinner?</TD></TR></TABLE>

It's not because they are thin, they are actually thinner sleeves in some other Honda engines. The problem is because the sleeves are all connected to each other where as in the B16/18 the sleeves are independent of each other. When a B20 sleeve cracks, it cracks along the connection to it's neighboring sleeve.

But, no you don't want to bore stock sleeves to 86mm.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1SickHb &raquo;</TD></TR><TR><TD CLASS="quote">hello ht memebers, just a brief question,,.. Boring a b20 to 86Mm All MotoR/ sleeves on CrAcK/make it 86mm bore.w/crower 95 mm crank </TD></TR></TABLE>
Go for it!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20vtech &raquo;</TD></TR><TR><TD CLASS="quote">
Go for it!! </TD></TR></TABLE>

AAAAAAAAHAHAHAHA!!! take pics after you pull apart the motor

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20vtech &raquo;</TD></TR><TR><TD CLASS="quote">
Go for it!! </TD></TR></TABLE>

 

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

</TD></TR></TABLE>
it was only a joke

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20vtech &raquo;</TD></TR><TR><TD CLASS="quote">
it was only a joke </TD></TR></TABLE>

i know... but if he has to ask for something like this i would think he could believe short of anything

 

yeah I mean I'm new 2 this all motor stuff I had a 85 mm gsr block turbo yeah that moved great but sold it...so now I want something wit atleast 250whp...Natually aspiRated....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1SickHb &raquo;</TD></TR><TR><TD CLASS="quote">yeah I mean I'm new 2 this all motor stuff I had a 85 mm gsr block turbo yeah that moved great but sold it...so now I want something wit atleast 250whp...Natually aspiRated....</TD></TR></TABLE>

be ready for some letdowns...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1SickHb &raquo;</TD></TR><TR><TD CLASS="quote">yeah I mean I'm new 2 this all motor stuff ...</TD></TR></TABLE>

the search button at the top of the page will answer all of these questions.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20vtech &raquo;</TD></TR><TR><TD CLASS="quote">
it was only a joke </TD></TR></TABLE>

so was my comment...one of my friends did this sometime last year on his 'street' motor...it didn't even last 3 months

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1SickHb &raquo;</TD></TR><TR><TD CLASS="quote">yeah I mean I'm new 2 this all motor stuff I had a 85 mm gsr block turbo yeah that moved great but sold it...so now I want something wit atleast 250whp...Natually aspiRated....</TD></TR></TABLE>

 

never use stock sleeves if u are going over 85mm bore on a b20 block...

250whp can be possible with the 89mm crank, but it would be alot easier to achieve with a bigger crank....

 

my friend bored his 20 out to 86mm and it ran for a while, like 7 minutes. i say go for it, hulk hogan doesnt need sleeves, and neither do you

 

the only reason to go 86mm on a B would be to accommodate larger valves. that said, has anyone simply notched the tops of their sleeves to allow for big valves with, say, ~84mm bore? it seems as though you'd hold HGs better than having bored the entire cyls to 86mm, and done properly, using larger valves can accommodate for more flow.

 

larger valves are a tricky thing