85mm on b20 stock sleeves
11-19-2005, 10:42 AM
#27
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Re: (sleepycivichb)
A friend of mine has a 85 mm 13.7 comp pistons on stock sleeves, and makes 236 whp. He knows it can give at anytime, but it's been like that for some time. It's still holding up. I don't recommend people do this if you don't have cash lined up in the chance something does go wrong.
11-19-2005, 12:03 PM
#28
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Re: (AllMTRWH0R3 2)
sleeves are pretty weak, but you should be alright, we have done that on a couple of set-ups all motor of course, just make sure it gets tunned properly.. good luck 
11-19-2005, 09:44 PM
#30
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Re: (sa90eg)
i have done a couple of 85mm stock sleeve b20's with no probs both 11.8CR revving 2 9k however we used block guards on all of them, but for advice i would reccd 84.5mm with a block guard because the gains between 84.5 which is 1996cc and 85mm (2020cc) are not worth the risk..(in my opinion)
11-19-2005, 10:52 PM
#31
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Damn, I have 84mm with blockguard and I don't take mine pass 7800rpm, CR is ~11:1. Redline is set at 8296rpm w/Crome but I just don't trust going that high even though I have been told it'll be ok. The more I read these posts with guys going higher than 8500rpm on stock sleeves, the more courage I have to try go at least 8200rpm.
Good info. . .
Good info. . .
11-20-2005, 11:07 AM
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Re: 85mm on b20 stock sleeves (sa90eg)
i would just buy an ls block cheap and sleeve it . the money you spend on a b20, you are halfway there on a sleeved block and people who sleeve b20's, what a waste!
11-20-2005, 01:59 PM
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Re: 85mm on b20 stock sleeves (BrianSi91)
THAT is an opinion and everyone is entiltled to it .. i preffer b20's because for the most part, usually when you purchase a b20 motor(at least from me) they are 98+ up motors, which usually means that the cranks are in better condition compared to buying someones old *** 1990 b18a block which has been swapped into every friends car that he knows. plus you can pick up a b20 long block for 550-700.00$
11-20-2005, 02:35 PM
#35
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Re: 85mm on b20 stock sleeves (HOOKUPS)
The first motor that Chris had in his race car was a B20 Vtec .And it made 215 or 220 I can't remember exactly.But he ran the **** out of that thing.There is one thing though...Don't try and use jun IIIs with the stock pistons.It makes a big mess.LOL
But that was 7 years ago.
But that was 7 years ago.
11-20-2005, 02:52 PM
#37
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Re: 85mm on b20 stock sleeves (HOOKUPS)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HOOKUPS »</TD></TR><TR><TD CLASS="quote">THAT is an opinion and everyone is entiltled to it .. i preffer b20's because for the most part, usually when you purchase a b20 motor(at least from me) they are 98+ up motors, which usually means that the cranks are in better condition compared to buying someones old *** 1990 b18a block which has been swapped into every friends car that he knows. plus you can pick up a b20 long block for 550-700.00$ </TD></TR></TABLE> Very true. Also they are in automatic cars which tend not to be abused for the most part ( not always the case, but look at the demographics of who drive crv's? ) <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RMF »</TD></TR><TR><TD CLASS="quote">The first motor that Chris had in his race car was a B20 Vtec .And it made 215 or 220 I can't remember exactly.But he ran the **** out of that thing.There is one thing though...Don't try and use jun IIIs with the stock pistons.It makes a big mess.LOL
But that was 7 years ago.</TD></TR></TABLE>This man looking out for you guys. I remember he gave me a ride in his crx at Atomic, I almost **** my pants!!! This was in 99
But that was 7 years ago.</TD></TR></TABLE>This man looking out for you guys. I remember he gave me a ride in his crx at Atomic, I almost **** my pants!!! This was in 99
11-21-2005, 04:57 PM
#39
I built a b20 with stock sleeves bored out to 85mm. Been running and pounded on for 2 years now. Still going strong with no problems. The overbore was an accident though. THe machine shop was supposedly to hone the walls and get a good crosshatch in there. Ended up going past the 84mm mark and jsut decided to use 85mm because of a budget.
This motor gets revved to 9500rpms whenever possible with Jun valvetrain and jun 3 cams
This motor gets revved to 9500rpms whenever possible with Jun valvetrain and jun 3 cams
I get a little stunned whenever I see a post about a stock sleeve B20 revving to 9500rpm. . .let alone one with a 85mm bore.
11-22-2005, 06:21 AM
#41
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All I hvae to say is 85mm 9800rpm all day. Just build it right it. If any one says it can't be done there crazy. Just make sure you have a upper head insert gertile. I'll have a video soon. Just to prove.
11-22-2005, 03:28 PM
#46
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Re: (paul vang)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by paul vang »</TD></TR><TR><TD CLASS="quote">that's why we pay good money for engine balancing right? </TD></TR></TABLE>
I have yet to have an OEM internal need balancing.
</TD></TR></TABLE>I have yet to have an OEM internal need balancing.
11-22-2005, 03:31 PM
#47
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Re: (SkRiBLaH)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SkRiBLaH »</TD></TR><TR><TD CLASS="quote">ever wonder why spoon/mugen/typeone/any real circut sports shops do not touch the b20? or LS?
think they just overlook it? i think not.</TD></TR></TABLE>
But what does that have to do with anything? There are plenty of builders here in the US that make great power out of them and have kept them reliable. DonF has built several B20 road race motors, and to my knowledge none have let go after a season of abuse.
think they just overlook it? i think not.</TD></TR></TABLE>
But what does that have to do with anything? There are plenty of builders here in the US that make great power out of them and have kept them reliable. DonF has built several B20 road race motors, and to my knowledge none have let go after a season of abuse.
11-22-2005, 11:33 PM
#48
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Re: (SkRiBLaH)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SkRiBLaH »</TD></TR><TR><TD CLASS="quote">ever wonder why spoon/mugen/typeone/any real circut sports shops do not touch the b20? or LS?
think they just overlook it? i think not.</TD></TR></TABLE>This mean what? Are they god? wow I am so glad they have broken every record on any type of racing there has ever been
Just because they have not messed with this type of motors ( which if you do your homework know that they do have ls/vtec too in there cars..... and yes they do retain the cranks too) Those not mean you should diregard these motors. IT make you close minded and unaware of the possiblities of the power or reliablity that can come from such combinations.
think they just overlook it? i think not.</TD></TR></TABLE>This mean what? Are they god? wow I am so glad they have broken every record on any type of racing there has ever been
Just because they have not messed with this type of motors ( which if you do your homework know that they do have ls/vtec too in there cars..... and yes they do retain the cranks too) Those not mean you should diregard these motors. IT make you close minded and unaware of the possiblities of the power or reliablity that can come from such combinations.
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slimbo
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