i been thinking about building a B20/vtec with itb's but i wanna throw in a big shot of nitrous is it possible to use a direct port nitrous system with the itb's? Has anyone done this before? Thanks for your help

 

yes

every directport kit will work

lock

 

coo so what compression ratio do you guys recommend to run on that set up?
right now i currently have an ls/vtec running itr spec forged pistons is that compression ratio good or what do you guys recommend?

 

what fuel are you gonna be running? is it a track or street car? as long as you have enough octane and degree you timing your compression will not matter

 

nitrous likes compression..

 

true true

question is are they standard b20 sleeves?

high compression + b20-sleeves + big shot requires spot on tuning or

i was piecing together my next season b20vtec but strayed away because of the unforgivability of the b20 sleeves and went 81mm instead.

for a street motor on pump gas and 50-150shot i'd say stick around 10.5-11.5:1 c/r
decent off spray power and enough power on spray to spin 3rd gear

 

well i was planning to sleeve the b20 i know about the sleeves on the b20, so i was definately gonna do that plus i was gonna run either 100 or c16 since its gonna be a track car

 

spray away, sky is the limit

start slow and work your way up tough

 

should be nasty just gotta build it right with the right parts

 

me likee

 

i know somebody locally here who did a b20/vtec with level 3 cams on a stock valvetrain, 72mm itbs and a 100 shot

 

I would like to see a photo of that. How did they manage to fit four 72mm openings side by side on a B motor?

 

need to find out whats the proper head bolt torque i need to use to tie the head down 96 gsr head to a b20b block???

 

x2

That must be one hell of a built up b series to require 4 x 72mm throttles. They must be running in the 12-13k rpm range to make full use of them.

 

Bore c-c is about 90mm on B's, so they could fit.
I thought we did all the crazy huge ITBs though, who's making 72s????? that's absolutely insane for a B, 68s are too big for the biggest K's...

 

that was a typo i meant 62mm. anyways, he blew it on the 3rd pass on his first night out. did you really think that would last? LOL

i just said i knew someone who did it. i never said i didn't think he was an idiot...

 

nah, he just slapped some big a$$ cams in there and expected it to last. it wasn't even tuned. but then again it would have just blown up on the dyno