japanbran

i am building a ls vtec turbo motor. the block is a b18b. je 9.1 comp pistons, acl bearings, eagle rods, and itr oil pump. my head is b16 head sk2 stg2 cams, milled .20,itr vlaves, itr springs, sk2 retainers,aebs intake mni port matched to a jg tb, rc injectors(not sure what size yet),jun cam gears. i have been looking around on here seeing people run 18-20psi on similar block set-ups. but with my head shaved it raises my comp ratio. how much boost could i run tuned safely for a dd?

BoostedEG6

its not how many psi that matters..... you can run 8psi with a shitty tune and blow your motor.... tuning is the key to a boosted motor

ImportMotorSpec

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BoostedEG6 &raquo;</TD></TR><TR><TD CLASS="quote">its not how many psi that matters..... you can run 8psi with a shitty tune and blow your motor.... tuning is the key to a boosted motor </TD></TR></TABLE>



I would get a boost controller and have a street/pump gas tune and then a track/race gas tune.

That is what i did and am going to continue to do. 18 psi street and 25 psi (maxed injectors out) last year, this year mid 30 psi.

japanbran

i know the tune is key, what i am asking is how much can my block handle?

HiProfile

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BoostedEG6 &raquo;</TD></TR><TR><TD CLASS="quote">its not how many psi that matters..... you can run 8psi with a shitty tune and blow your motor.... tuning is the key to a boosted motor </TD></TR></TABLE>

Not just that, its also limited to the gas you use. DD's need to use whatever's in range. Out here we only have 93 (100, c16, e85 is a pain to get), so that means ~400whp. WHat you have is more like 600whp worth of components, you seriously only need half that for a DD that can't get traction. Speaking of which, I'd put the money into suspension/tires first for that much power.

93supercoupe

with stock sleeves, 400-500 safely.

With pump gas, under 400 safely.

Without traction, it doesnt matter.

BoostedEG6

I have seen stock sleves take 25+psi on really really good tunes and race gas

on pump gas I wouldnt push it more than 12-15 psi... but you should ask your tuner what he feels comfy tuning

japanbran

thats what i wanted to know. btw, my suspension and traction problems have been addressed already. thanks for your concern. i am running adj koni yellows with gc coils, Ti lakewood traction bars, 225-50-15 bg radials. and lsd to come. i dont think there is much more i can do to help it.

93supercoupe

with 400plus, u could have all that and slicks and it would still spin on the street.

japanbran

could, but i dont plan on using the power on the street