Using a swirl cal with a G head, do I need to up fuel psi??

[daytonaturbo87]

Planning on converting a G headed motor to T2 status. Already have a 87 T2 LM and most of the needed parts. My question is, will I need to up my fuel pressure by a few psi? I heard that the G head flows better than the swirl head, plus I may do a little bit of basic porting and port matching before the head goes back on. Will I need to up fuel pressure by a few psi to make up for the extra flow over the stock swirl head that the 87 T2 LM was designed for?

[Stevien1]

You'll be fine, the LM will be able to adjust it's adaptive fuel memory after a few driving cycles. If anything, you'll want more spark advance to counter the loss in compression.....

[daytonaturbo87]

okay, I woulda though it wouldda needed more gas, but maybe not then. Also, block was originally G headed, so no loss in compression, though I have heard the G head likes a few more degrees of timing just cause of it's design.