Yellow_stang

Ok i called summit today to ask about an upgrade pulley for my supercharger Paxton 1000 i dnt have an intercooler and they said that 12lb of boost would b dangerous 4 my daily driver. My setup i ordered the 900series from mmr .20over i have pi heads that were p&p stage 2 spring kit from trickflow with larger valves, and crower stg 2 supercharger cams 39lb injectors. Mmr told me that my compression should b 9.1 now i want to make some where around 5 to 600whp so im thinking on getting 10 to 12lb pulley will it b safe to do so ?

also for my head gasket i ordered the Ford racing head changing kit from summit that comes with head bolts will those b good or should i play it safe with Arp.

jvog

with a built shortblock a 12lb pulley will be fine. You are gonna need bigger injectors though.

jagass

Same question here...

scubasteve22

as long as ur motor is built u will def be safe...but u are def gonna need some more boost to be anywhere near 600rwhp...about 20psi

mustangman281

12lbs will be nothing on that block. You must get the arp head studs if you are planning on running over 10 lbs. I am running 18 lbs and made 550rwhp before we turned on the meth and retuned it.

jvog

Why are head studs needed? I was just going to use the ford racing head bolts that come in the kits, uh oh...

mustangman281

TTY bolts stretch and with high boost causes them to stretch more and blow the head gasket.

Yellow_stang

I have the ford racing head gasket will that be fine or is there something better than that, also you guys say arp head bolts is the way to go right that way i wont have to worry bout it later right... and if im not mistaken i also need bigger than 39lb injectors ?

Black_GT_02

Not the jack the thread but it looks like you got an answer thats legit. My tuner has my set up @ 13lbs at 65000rpm because of the d1 blower. He said it shouldn't hurt anything. The a/f ratio is spot on also. It's safe right?

grogan

14 psi is the maximum on the stock bottom end. built blocks i wouldnt know.