How much boost for different engines?

ASSISTANCE Forced Induction
1

I’d like to turbo my stock b18a. Due to the stock internals, I’m not going to boost over 10 psi.

However, someday far in the future I might want to go to a different engine, like a LS/VTEC, CRVTEC or B18C. I want to be able to use my same turbo setup on whatever engine I go to, so whatever I get for the b18a needs to have room to expand in the future.

I don’t plan to ever run extremely high boost since this is a street car & I don’t want a lot of lag, but I wold think that with an engine that is bigger and/or can rev higher I could run more boost than on a b18a and not get any lag.

Supposing I had something like a built CR/VTEC, how high could I boost & still get quick response and low lag? What kind of turbo would be ideal for that application?

I want to have a little room to expand in the future without oversizing the setup for the b18a… I definately don’t want to go too big on the turbo & have it be laggy, but as long as the b18a can spool it quick enough, I don’t have to run it at the maximum boost it can handle either… I need to find the best medium so that I have something that will work well for the b18a but can still reach its potential with a slightly higher flowing engine… any advice?

I think I will most likely end up pieceing together a kit myself, if just to save money; even in the event that there is a kit out there that would fit my needs…

2

get a 14b. but it all depends on how much you want to spend, and I’d be careful boosting to 10lbs on a stock b18

3

you don’t need to build a cr-vtec motor. you can sleeve & bore your ls block to 84mm for the same cost & put a vtec head on that. the end result will be a much stronger motor. you want to at least run a t3/t4 turbo but if you have the money to build a monster motor, i’d compliment it with a bigger turbo, sucj as a 60-1.