i was running ati p1sc 8# setup on stock motor. now the same setup is on 383 w/afr 220 heads and .594 lift cam. what boost should i expect now and what can i do with this unit to increase boost. diff. pulleys avail.?
thanks

 

Those are some pretty big heads you are going to be running. There are a few ways to get more boost out of your head unit. You can either change your blower pulley ( which I suggest) or your crank pulley. Since you are going to be running the blower on a 383 I would recommend upgrading your P1SC to a D1SC.

 

thanks, that's what ati suggested. you see any problems in tuning/breaking in the motor with this current setup?

 

ttt
anyone see any problems with tuning and breaking in the motor with this setup?
thanks

 

I don't see any problems because almost any motor can be tuned right if the right person tunes it. With those heads, your boost probably dropped to 6 or less, and you won't feel it on that motor until higher rpm's. If you want to stick to that setup then change pullies and run more boost. The D1SC would make the same boost but at lower rpm's which is ideal if you drag race. Procharger suggests running 15psi or less on a P-1SC, although you can run more, thats what they suggest. A D1SC can handle 15+ psi but how much do you want to run?? Its really up to you. What are your goals with this motor??

Nick

 

thanks, i want to eventually end up at 15# with an upgrade on the blower unit. for now i just want to get the bugs worked out.