i have a 1991 crx si it have a d15b7 in it right now and i have a 1992 da 4 door shell fa sale for 500 with a b18a what should i do.pull the b18a out the da and put it in my rex and boost that are just turbo my single came ???

 

If you wanna boost the SOHC, I'd jump to a D16 first. What happed to the D16A6 your CRX came with?

*edit: Also, are you still MPFI or switched to DPFI?...since your car went from 1.6L to 1.5L....

If you drop the B18A, I'd leave it N/A.

Personally, I'd swap a D16A1/8. Not legal due to motor-to-chassis age, but easy, straight, clean. I did it before and I'd do it again. Just becareful.

 

i bluw the d16a but i want to put the b18a in ma rex and boost it or just boost me d15 ?

 

ehhh boost the d after thats goes swap the b and boost with a good tune.