Have a gsr p72-1 head on a b18c block,also have vtec running on a b18c1 ecu, is it OK to run vtec and the b18c1 ecu?

 

Yes, the fuel maps may be slightly lean for the compression ratios as you will have slightly higher compression (about 10.6 to 11:1), but overall it should work. Fine tuning with Hondata or similar will net some gains for 91 octane fuel and allow you to get the most out of it. If you want to go old school you can get a fuel pressure regulator and up the fuel pressure slightly, which will make it run appropriately under load but rich at idle and part loads.

 

^^ right on the money

 

I've been running 91 octane with no octane booster,and already have a fuel pressure regulator just need to install it

 

91to 93 With NOS octane booster, I can get 104 at my buddies air strip for decent price, then I could flip the pistons and rings to run a 12.2 or more without getting ridiculously pricey correct?