[Angelmarie]

Was just wondering since I already had a dynoed map do i have to have it retuned if i go from a stock to a 11.5:1 cp piston? elevation 2,000ft i believe
thanks

 

[wobble]

Increasing compression will require higher octane to prevent detonation, but does not change a/f ratio, so no map changes are needed.

 

[TechQuadShop]

In some cases with a big compression bump we have had to lean maps out a couple percent. But overall the map you are running now should be fine.