Der91Z

iTrader: (1)

I have a 388 with AFR 210's that will be yielding about 9.1-9.2:1 compression. I was wondering what is the maxium amount of boost that i can run on pump gas with the ATI P1-SC Procharger with the twin hi flo intercoolers on 93 octane.

PETE

iTrader: (1)

What pistons, Rods, crank,etc. Just because you can run 12-15 psi on a meager bottom end(even with forged pistons) doesn't mean it will do it for long. I'm new to the boost tuning world and have quickly gotten out of how much boost could I run v/s what boost makes the engine and subsequently the blower happy.

Go to high on boost you get out of the efficiency range and pump hot air into the engine and you may go boom. You have to give a few more details for anyone with experience on anyhting close to your application for them to help you...............

Der91Z

iTrader: (1)

Yes I'm sorry i just thought about that today when i made the post last night. I have aluminum AFR 210 heads. Nodular iron crank, keith black hypertectic pistons, GM pink rods that have been shot peened. I should restate my question to what is a recommended boost to run on my motor with my specs. My cam is also a 222/230 if that helps any.

PETE

iTrader: (1)

You could probably run 6-8 psi on that combo (intercooled). It's not so much the intake and duration of the cam(blown applications like more exhaust duration to help evacuate the cylinder). The LSA or LDA is the key by using a wider LSA(overlap) you can bleed off some cylinder pressure and run more boost. I would say 5-6 psi would be max right now but you gotta watch the af ratio, too lean and those hypers wont last long.

Kingtal0n

my opinion... 5-6 non intercooled boost...
8-9 intercooled.

stock pistons will last with 8-9 PSI of intercooled boost, even without spark retard and with 10-11:1 compression.

so sayeth the ati website, so sayeth my fingers.

B4Ctom1

how much boost do you think he will be able to get out of a P-1sc on a good flowing 388? I mean if you tried with the best/highest pulleys ATI has, how much boost do you think he can develope on a good flowing 388?

Kingtal0n

Figure about 12-14 PSI at most. thats on a well breathing 388/383. According to ATI, the P-1SC can make 16 PSI on a 350, and about 18 PSI on a 302. so following those numbers...

thats what it says on their brochure thing i got in the mail.

PETE

iTrader: (1)

12-14 psi is really pushing it. Just because they claim a given psi doesn't mean that the motor will handle it. When you start heating up the hyper pistons the silicone(high content) starts to melt and flake and pieces will end up crystalizing in the combustion chamber(see very bad). It will come apart in pieces not crack and hold together like cast or forged! Be vewy vewy careful... Your hunting Fords!

B4Ctom1

I was afraid of not being able to produce enough boost on a 415 so I have decided to build it as a 350 destroked 400.

Kingtal0n

<b>12-14 psi is really pushing it.</b>

I DONT think he was asking how much was SAFE, i think he was asking how much the supercharger could actually produce MAXIMUM. THATS the number I gave him, off ATI's site. NOT the max safe boost. the max safe boost on a well built 383/388 would be around 18 PSI I would say. WELL built 383. I know of two people in my TOWN that run 14 and 18 PSI of boost with juice on a streetable 388 and a not so streetable 360. The motor can handle the pressure if its built right. Anything BUT forged is out of the question, of course.