jakethesnake110

hello, i just got a free d15b2 that runs and just needs a rebuild, i like to have fun, so i figured i would throw a little performance in the bottom end of this lil baby and throw some boost to it, but as a lot of people on this forum, i am fairly new to boost as well, i understand most of it but lackin a few things, so when i rebuild it. wat EXACTLY would i need to do in order to push no more than 10 to 12 psi? for my block to hold up? could i run eagle h beams and non turbo pistons? and i know the crank will hold, and of course race bearings, and arp bolts, so wat else needs to be done b4 boost? from wat i read it will need to be chipped, but other than that? i just want a solid build for semi low boost for semi cheap? help me out plz?

busa4

most stock engines can take 10psi or less boost with no problems. since you have to rebuilt it anyway spend the money on a good performance build with eagle rods and low compression pistons and boost the ---- out of it. crank should be fine. 20 lbs of boost will give you ~300 hp.

Clean

"20 lbs of boost will give you ~300 hp" - that's a pretty vague statement if i ever heard one...

it's not boost pressure that you have to worry about. It's torque or power ~ cylinder pressure.

Usually on honda's (I know b18's for sure), it's safe to run stock internals up to 300hp. Most put in ARP head studs as a safeguard.

busa4

thanks genius. thats why i used the approximate symbol (~). of course there are many variables....

jakethesnake110

so on stock internals i would be ok running 10psi or lower? that kinda scares me? would i still be able to drive it every day? i just dont wanna blow it up after all this work, ya know? and wat kinda tune could i use?

Clean

i've got a 2000 gsr - stock internals. Only upgrade i did was arp head studs. I run 10psi on a small 16g (small turbo)~ 250whp. It's my daily driver. I've put 50000 k on it in the past 5 years.

My compression across all cylinders is around 225 and last time i had it leak tested it was perfect.

boost pressure is meaningless. 10psi on a small turbo isn't the same as 10psi on a big turbo.

However, if you're rebuilding your engine anyways and don't mind spending an extra $1000 on pistons & rods, you might as well do it right and get low comp pistons and stronger rods.

There's lots of tuning software available to you - uberdata, crome, turboedit, etc... some are free, some are cheap.

First, you need to do some reading. There's lots of info here and on other sites to learn. garrett has a whole turbo tech section. Maximum Boost by Corky bell is a good book too.

jakethesnake110

so wat would be a good size turbo to use with my d15 stock rebuilt bottom end? and a cheap tune? or decently priced tune?

Clean

I wouldn't recommend it on a budget. They don't make DSM T25 flanged manifold's & downpipes for honda's. Plus, it's a small turbo and spools too early.

Before you do anything, read read and read some more. Look around honda sites to see what everyone else is running. I can't completely spoon feed you. It's a learning experience after all...

jakethesnake110

i would just like to know wat would be a good setup, turbo, mani, chip? wastegate, bov? intercooler

Clean

if you don't want to do any work. buy a kit.