My gut says you may want to run the 8:1 disk, but you shouldn't go off of my gut.

You should go off of the calculations in the FAQ brain wrote, or the injector calculator on the RC website. But the wideband would be the best thing to adjust with.

 

Thanks.. I have the 90 hp engine with the ECU that gives a little bit less fuel on the top than the 90-93 ECU, so if I am lucky i do not need the 8:1 disk. And if i do, they sell the kit at summitracing.com