I am currently running 550cc primaries (stock) with 1600cc Secondaries. I am looking to obtain a little over 400 RWHP lets say in the 420's. I have a new fuel rail with 850cc primaries installed, will this setup; 850,1600 cause the car to run too rich. My engine has a large streetport, T-78 with all the supporting mods, Power-FC etc... Please LMK Thanks lassen118

 

Only if you tune it to rich. Idle will more likelly be rich with 850s but that should be it.