how to support boost
 

Alright guys, this may sound dumb but I've searched high and low. I have a d15 in my crx, already did the mpfi swap with 310cc injectors. Slapped a turbo on and running 7psi. I'm new to the import scene. i know for a v8 you have to reinforce the bottom end to support the forced air but not sure what i have to do on these 4 bangers with only a peak of 160hp. So my questions are: if I'm running 8.5 compression stock, do I need lower compression pistons?; Do i need to sleeve the block?; Do I need double valve springs for higher revvs?; Head studs?; Forged crank? (keep in mind im only running 7psi) I've noticed a lot of yall running 7psi on a stock engine with no problems and only doing internal mods to run high boost.

Forged crank??? LMAO its not a chevy man.
PSI is irrelivant.
Read more... ALOT MORE. This site used to be a grrrreat resource for what you are asking, not somuch anymore.

Sadly.


If your not running a bar youre a girl.

No sleeves
No pistons
t3/04e 57 trim
14 PSI...
DSM450s will get you 300


MAYBE headstuds


Then get it tuned...

A d15 doesn't have 160hp or 8.5: 1 CR stock. Which d15 do you have? d15b vtec? All you have to do is read...everything your doing has been done time and time again.

Oh my bad, just been working on the Z28 too much (it has the 8.5: 1). 9.2: 1 CR and Im estimating the boosted power to be 160 or so.

hondas have forged cranks stock. i dont know off hand what the d15's have for compression but you are close enough.

untuned, you dont have 160whp. dyno tuned on 7psi 160whp is possible.

you can run 7psi with no issues on a 100% stock block. if you plan to leave it like that for a while then get it tuned.

And D15B non-vtec. And yes it is just D15B (nothing is after the B). I have a lot of guys telling me they only made a vtec D15B and then I open my hood and have to show them.

Yea, I just want to get everything right before bringing it in to get tuned. So when they run the piss out of it, it will stay together.

So headstuds for insurance and it will be fine if I stay at 7psi?

Throw a new mls headgasket on there and arp's and your golden. Now get to searching so you know what your doing with this thing.

You did the mpfi swap so I'm assuming you had one of the hf engines or something like that. I'm sure you'd be good for at least 7psi with a decent tune.