How deep are your buddy's pockets and how long does he want these motors to last?

Safe way is to start 4-5psi and adjust up from there. If he is a balls to the wall guy that always has to be fastest I doubt he will take that approach though. Also if his drives are Bravos that is another consideration, its always nice to have reliability

I am running 4-5psi on my 502MPIs with B&M blowers. I run the 93 octane fuel. Plenty of "go" with long term reliability as well.

502 mpi's and B&M HUFFERS???? :eek: I gotta see this..Did you mount them like whipple does their side mounted set up ..:drink:

Right on top

Not getting into any debates but here is my opinion.
The 8-71's at -15% won't make any real heat to warrant chilling and losing idle quality. If it had a 256 blower with a higher rotor speed I would say chill it. BTW, what kind of boat are we dropping them in?
Is this a weekend pleasure boat, Jet or I/O?
Also what size heads?

Fixx
 

speaking with mild a little whyle ago he said the boat their going in is a 38 cig flat deck..

looks good brutha :drink::drink:

That looks sweet

I,m with bfm. 4lbs of boost, no chiller, and no thermostat.

What "loss of idle quality" are you talking about? My blown/injected/intercooled 509 will idle until the cows come home.
And yes, the injectors are on top of the blower.

PS, as to the original question, I run 7psi but only 8.2 SCR.