Hey guys i am lookin to build a b20 v-tech.. I already have a head, pr3 ported and polished,ferrea titanuim valves,buddy club spec 4 cams,buddy club dual valve springs and titanuim retainers.. Anyways i was wondering if someone could tell me if you can run 13.5 to 1 compression pistons on stock sleeves and stock crank.. The rods will be replaced with crower ultra lights and stock crank would be balanced and blueprinted and polished and i planned on running a set of acl race bearings, also have main studs and rod studs and plan on running a block gurdle.. Carr will be tuned on e85 and i am going to daily drive it but i only drive around 10 miles a day.. Thanks for your time !!!!!!!

 

I think best way would be check yourself, to be sure with the cams your are using.

Clay your motor.

heres a DIY

http://www.c-speedracing.com/howto/claymotor/clay.php

 

oh yeah.. the motor will be getting clayed for sure to make sure that the piston has a enough big enough vlave reliefe cut out in them to clear the valves safely.. I just wanna know if the stock sleeves and stock crank can handle that kind of compression safely ????????

 

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realistically compression isn't what affects sleeves or cranks in any motor. It's the tune on the motor that directly affects reliability, assuming the engine was put together properly to begin with. Running that compression level on that fuel will require a good tuning system and someone who knows what they are doing to tune it. Too much timing at part throttle settings is usually responsible for cracking many stock B20 sleeves and taking out rod bearings.

 

Hey thanks for the info.. And i totally agree with what your saying. The car will deffinently be tuned right.. Wryan at VIP are local shop here in portland is very good with tuning on e85 and has done it for a lot of big turbo cars and high compression na guys in the portland area for quite a while now.. This will be the third car he has tuned for me on E85.. I am just full of questions being that i have never built a b20 set-up.. Thanks again for the INFO !!

 

need some more opinons guys