Originally Posted by
Dj-Timoty-Norway
how many PSI could i use on original set up engine
Have you got the 90 bhp KE-Jetronic one (does it say you can use 91 octane fuel in the manual)? That one's only running a 8.5:1 compression ratio so (with correct fueling) it should easily cope with 0,5 Bar (8 PSI)