03sierraslt

iTrader: (22)

What belt length and blower pulley are you running?

You are running 8rib right?

1SlowHoe

iTrader: (28)

Yes 8 rib. IW 25% crank pulley and a 2.8 on the nose of the blower. (non-jackshaft blower)
I don't remember what the belt length is. I just used whatever length the 6-rib belt was but I don't think I ever compensated for the crank pulley being smaller.
I remember searching and couldn't find a good answer on belt size. I didn't want it to be too tight and cause bearing issues on the alt or PS pump.
I'll look tomorrow and see if I can still read the belt.

AKlowriderZ71

iTrader: (22)

Nice to see you back at it! Start driving that thing!

03sierraslt

iTrader: (22)

You do mean 10% overdriven crank pulley right? And crank pulley is bigger not smaller. If you went with a underdriven crank pulley on a blown setup that would be like throwing rocks at your own house.

Lucille

Might explain why he is getting 8lbs on a 408 with a 2.8 pulley and I'm pushing 10 on a 402 with a 3.4 pulley.

03sierraslt

iTrader: (22)

Ya boost seems REALLY low for a 2.8 blower pulley overdriven.

1slow01Z71

iTrader: (36)

Is yours a jackshaft version?

1SlowHoe

iTrader: (28)

Yes, 10% crank. Sorry, I was working on 2 things as I typed that.
Not jackshaft.
The boost is not really important. The final numbers are. Those LSA P&P heads should flow pretty well so boost won't be so high.

1SlowHoe

iTrader: (28)

what numbers are you making with that set up

1slow01Z71

iTrader: (36)

You said so yourself that your exhaust doesn't flow that well. Everything upstream of the exhaust can flow badass but if its restrictive you're going to have higher boost levels.