donalson

i know there are a number of differnt IHI rhb5's around... the 2.2L ford/mazda, the 2.3 ford, the 1.8L subaru, and the (i'm not sure L) isuzu impulse

does anyone have info on them like wheel size differences? good pics comparing them?

thanks
mark

dewme5

in general, the smaller the number on the exhaust housing, the quicker it will spool, and the sooner it will top out/choke your engine. just the opposite for the larger number.

the larger the number on the compressor side, the more air it's capable of putting in there, and the more HP it will support.

find out what rhb5 you are looking at. Here is the best map I was able to find.

the rhb5 is going to be a rhf5?? a little confusion there for me.
http://www.ihi-turbo.com/turbo_RHE-RHF.htm

and here is a general sum of turbos and donors.
http://www.dune-buggy.com/turbo/turbo.htm