I am trying out 9:1 CR on a 3.8ltr TT motor that is in the works. The plan is to limit boost to 0.7 bar - no lag, quick spool. The hope that this is a nice streetable tyre burner with quick acceleration. I am not planning to race the car, so i dont need high end HP. (where i drive i rarely get the car in 5th gear). But, if i decide to track the car (DE etc), i intend to run 100octane and crank the boost a couple of notches.
This was all under the recommendation of my builder who has build porsche race cars for several teams (incl. some that raced at daytona).
89 930 Cabrio , (soon to be for sale.)