are b20b vtec's unstable

mango1 · #1 01-26-2005, 08:22 PM

if i was going to put a b20 vtec in would it be unstable without bulding it or having to resleeve the block. im just wondering because everyone does ls/vtec and a b20b block is about $500. This is all asuming im not putting a turbo on it cause it dont have the money.

KaMaKaZiPyRo · #2 01-26-2005, 08:31 PM

If you dont add turbo then the crvtec should be fine.

knorwj · #3 01-26-2005, 08:50 PM

chances are the b20 has a longer stroke than whatever engine the vtec head came off therefore if you start revving it up past the b20's stock redline which is like 7600 I think (or whatever it is) you may blow it if you don't build the bottem end.

civickiller · #4 01-26-2005, 09:41 PM

the b20 is a good motor because it comes with a vtec oil pump so you get the added oil pressure. but the weak link is the rod bolts. replace those with some arp rod bolts. its not bulletproof after that but its alot better than stock and it should last

mango1 · #5 01-28-2005, 03:44 PM

so i would want to trade the b16 tranny for a wider gear ration like an ls to bring down the rpms? and if i was going to build it i would want the bottem end done first then the head?

civicHBsi91 · #6 01-28-2005, 05:24 PM

You want to keep your b16 tranny.

If your going to build it, just do it all the first time it'll probably save time and maybe money.

KaMaKaZiPyRo · #7 01-28-2005, 05:27 PM

you should go with the gsr transmission, and also you should get aftermarket pistons becuase somthing about the valves hitting with the stock pistons.

civicHBsi91 · #8 01-28-2005, 05:29 PM

Its not worth the hassle to get another transmission. It would be a waste of time trying to find one or even money if you had to shell out more depending on how car smart and stuff this guy is.

mango1 · #9 01-28-2005, 07:59 PM

ok if the b16 tranny has shorter gears than a gsr or ls and if reving the motor high is what causes the most damage to a b20 block than a slightly widertranny would make sense. Also the b16 trannys gears are so close together because it is a torqeless wimp. Thats why im looking into a b20 cause i alreadyhave the b16 in my car. Also the gsr tranny are cheaper than b16 cause the b16 is better on the track and if i had the time to take out my tranny and work on it i would just pu in an ls final gear and leave the rest alone.

kornflakes28546 · #10 01-28-2005, 09:02 PM

yea don't waste your time w/ GSR tranny. if your upgrading transmitions get a ITR LSD tranny.

veedubmechanic · #11 01-29-2005, 02:28 AM

B20 cylinder walls crack if you do any kind of power enhancement other than basic mods (intake, header) . If you go nitrous - crack the cylinder. Turbo/supercharger -crack. V-tec head-crack. B20 made for torque not high compression made from a v-tec head being put on it from a b16 or b18 (accept in japan where they did it on crv with a special v-tec head for the b-20). Cracks are not fun... unless your a crack head.. and do crack and stuff.. mmmk

civicHBsi91 · #12 01-29-2005, 03:08 AM

Quote:

Originally Posted by veedubmechanic

unless your a crack head.. and do crack and stuff.. mmmk

Speaking of yourself are we?

civickiller · #13 01-29-2005, 03:13 AM

Quote:

Originally Posted by veedubmechanic

B20 cylinder walls crack if you do any kind of power enhancement other than basic mods (intake, header) . If you go nitrous - crack the cylinder. Turbo/supercharger -crack. V-tec head-crack. B20 made for torque not high compression made from a v-tec head being put on it from a b16 or b18 (accept in japan where they did it on crv with a special v-tec head for the b-20). Cracks are not fun... unless your a crack head.. and do crack and stuff.. mmmk

so who told you that bs ? i know your not speaking from experience. or speaking from friends experience. and if you really are then your friends dont know how to tune there motors properlly and if you want to half ass a motor then dont expect it to last.

knorwj · #14 01-29-2005, 03:41 AM

Quote:

Originally Posted by veedubmechanic

B20 cylinder walls crack if you do any kind of power enhancement other than basic mods (intake, header) . If you go nitrous - crack the cylinder. Turbo/supercharger -crack. V-tec head-crack. B20 made for torque not high compression made from a v-tec head being put on it from a b16 or b18 (accept in japan where they did it on crv with a special v-tec head for the b-20). Cracks are not fun... unless your a crack head.. and do crack and stuff.. mmmk

KaMaKaZiPyRo · #15 01-29-2005, 02:44 PM

Quote:

Originally Posted by veedubmechanic

B20 cylinder walls crack if you do any kind of power enhancement other than basic mods (intake, header) . If you go nitrous - crack the cylinder. Turbo/supercharger -crack. V-tec head-crack. B20 made for torque not high compression made from a v-tec head being put on it from a b16 or b18 (accept in japan where they did it on crv with a special v-tec head for the b-20). Cracks are not fun... unless your a crack head.. and do crack and stuff.. mmmk

no not exactly, the b20 walls are thin yes, but I have only heard of them cracking when using high amounts of boost. people ride around with crvtec motors with stock sleeves. there not as weak as you think, as a matter of fact ive read about b20 motors with turbo can last up to around 6-8psi. so no your walls wont crack with a vtec head.

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