96TransAmboosted

iTrader: (8)

Im running a 8 rib kit on mu procharged lt1, i ordered a few pulleys and forgot what psi each size is. I understand engne mods dictate boost.
Pulley size on blower is 3.70
Engine is 388
Le3 heads
Pacesetter longtubes into y with bullet
Rev limiter 6800rpm
Blower cam

I also have a 3.40 pulley
And a 2.8x pulley

If anyone could help me determin what boost these pulley will put out would be a great help. Thanks

scottywheels

Depends on crank size... I ran a 7.0 pulley with a 4.50 in pulley on my F1C and it made 14 psi. I was spinnning the blower at only 56k rpm when the car was a 7000.

Blown06

iTrader: (32)

You don't even say what blower you have...

96TransAmboosted

iTrader: (8)

F1 blower

Bob@BruteSpeed

iTrader: (16)

I'd go with the 3.70 pulley and see where you're at boost wise, as the F series of blowers have a different gear ratio than the smaller blowers. I was seeing 18 to 20 psi with an F-1A on my 408 - 9.5/1 compression with a 3.90 pulley. Bob

Blown06

iTrader: (32)

Is it just the regular F1 or one of the other 53 variations of....

BLNLS1/RX7

iTrader: (2)

Bobs the Man on ProChargers.

Bob@BruteSpeed

iTrader: (16)

Thanks Steve, I appreciate it! Bob

Monte4ever

iTrader: (2)

Hey Bob, what kind of pulley set up was you using (8 rib, 10 rib, clog)?

Bob@BruteSpeed

iTrader: (16)

I was using the stock J bracket with an 8 rib pulley, which required tightening up the belt every run. Bob