are b20b vtec's unstable

[mango1]

i did read that the stock pistons are not a good match cause the valves hit the pistons (ithink thats what they were saying it was witten in F.O.B) but a b16 piston would fix this just use the stock crank or some after maket ones. Anyway would this motor be faster than a gsr? ( i really wish i knew of sombody that has done this)

[civickiller]

b16 pistons is higher comp than a b20 pistons. so if any of them are hitting, its the b16 pistons. but they dont because its just like an ls motor

[turboEKhatch]

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

My brain hurts when people make stupid comments with no factual basis.

My Ek is my only car, and for a while it was a N/A B20 VTEC. 84.5MM domed wisecos, ARP's, eagle rods, ported ITR heads, crower 402's, cheap DC header, and hondata. Made lots of power, turned it to 9000 daily.

[KaMaKaZiPyRo]

well you cant use b16, gsr, and type r pistons because they all come from engines w/an 81mm bore, the b20 has an 84mm bore so that wouldnt work.

[Doubletap]

Originally Posted by kornflakes28546

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

The ITR tranny is good however it leaves him in the same problem as the b16. It's ratios are really short and it needs a high rpm motor to utilizie it efficiently. I would go with an LS if you are really going to change the tranny. The ratios work great with a higher tourqe car based on my expirence.

DoubleTap

[turboEKhatch]

Originally Posted by Doubletap

The ITR tranny is good however it leaves him in the same problem as the b16. It's ratios are really short and it needs a high rpm motor to utilizie it efficiently. I would go with an LS if you are really going to change the tranny. The ratios work great with a higher tourqe car based on my expirence.

DoubleTap

8500 RPM's + ITR/B16 trans gives you 157 MPH worth of top end on street tires. An LS trans gives you 193 MPH in 5th. B16/ITR is a LOT more fun on a B20/VTEC car.

[mango1]

so you would need 84 mm pistons that are domed or whatever to do the vtec head right? and yes a b16 or itr tranny is a hell of lot funner but i dont have the money to fully build it to run at high rpms all day like the itr's and b16 motors and a ls is more practicle for daily driving and has a decent ratio. but a top end geared for 193 is pretty high(my old rx-7 was geared for 191 and it could never push over 140 cause it just ran out of power)

[civickiller]

you dont neccessarily need domed pistons to run a lsvtec or crvtec. its just that higher comp pistons give you more power.

[KaMaKaZiPyRo]

what all would he need to do to get the crvtec to rev higher?

[civickiller]

how high do you plan on revving this motor too ?

well since his b20 already has a vtec oil pump, that takes care of that. next thing would be the rod bolts, stock rod bolts are weak and will stretch and break. get some arp rod bolts. thats the basics right there.