sux2bme

Is there a chart that will give you a guide line of how much boost you will make with what size pulley?

next question:
what is the smallest pulley you can put on the D1 keeping it under the max flow of 1400cfm?

Thanks

adam205348

I am sure some of the guys on here can come up with something for you. But boost is not soley based on pulley size. Boost is a measurement of restriction. The better your motor flows less boost is required to make the same power as a worse flowing motor. Your cam makes a big difference on the amount of boost you make. So to get you a straight forward answer of a 3.8" pulley will give you 10psi is just not going to be accurate. There are ball park figures that the vendors or a bunch of the guys on here can toss your way but dont expect them to be dead on when you install the system.

sux2bme

thanks
i do understand that,
i guess what i'm looking for is the smallest pulley i can use to keep it under the 1400cfm???

5 Liter Eater

It's not the CFM you should worry about, it's the max RPM. The Max impeller RPM for a D1SC is 65,000 RPM and it has a 4.44:1 step up so the pulley can't be spinning faster than 14,640 RPM (minus a little less for safety's sake). The crank pulley is 7.37" in diameter. With a 6500 redline I get 3.33" minimum pulley diameter.

I did find this: http://www.exoticperformanceplus.com...html?item=1077

sux2bme

thats what i'm looking for

thanks

0LJo

The max impeller RPM for a D1-SC is 62,000 and the gear ratio is 4.10:1 and the smallest pulley you should run is a 3.40" pulley.

5 Liter Eater

Sorry, was looking at the D1.

excessive81

3.4 is max on stock rpm limit. iwent 3.5 cause i can run over stock rpm

sux2bme

are you running a 418 ls3?