Is it true that upgrading the primaries to 850s will make the car run way too rich when not mashing the throttle? Some have said that upgrading the secondaries is better than upgrading the primaries to 850, but my local and very well known shop has advised me to upgrade the primaries instead of the secondaries. I have the Apex single turbo and the Power FC. Any suggestions or first hand knowledge of this? Thanks, Bobby

 

as long as the power fc is tuned correctly you shouldn't have any problems