MMS Crank Pulley and Boost.

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Oct 1, 2003 | 01:54 PM

NA$TY-TA

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From: San Antonio, TX

MMS Crank Pulley and Boost.

I ordered the MMS Crank pulley this morning and i was wondering how much boost I should be seeing. I am running the 3.2" pulley now w/ the stock crank pulley and I am only seeing 7lbs @62-6300. I shift at 6300. I also have a 4" pulley. From Mike Morgons posts about how much boost on a stock motor, his crank pulley, and the 4" pulley should be between 12-14lbs. I am running LT's no cats and a small cam. 212/218 .522/.529 on a 114.
When i change the crank bolt should i get another one from ATI or reuse my old one? Thanks

Oct 1, 2003 | 04:14 PM

BIGBOS

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Re: MMS Crank Pulley and Boost.

You will need to get a bigger pulley try out the 4.0" one that you had to start, my 7.85" 8 rib ASP pulley is setup with a 3.3" blower pulley to get me around 12-13psi..

Oct 1, 2003 | 07:04 PM

AzzHauler

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Re: MMS Crank Pulley and Boost.

I've seen up to 10psi with the mms crank pulley and 4.0 blower pulley combo. I'm also having some slipping issues, very inconsistent at the moment. I'm pretty sure the 10psi was in the lower 5000's so I think 11-12 should be possible. I'm also planning on trying the bigger filter that michael used on his car. He picked up a pound or 2.

Oct 1, 2003 | 07:05 PM

AzzHauler

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Re: MMS Crank Pulley and Boost.

Oh yeah and thats hookers w/o cats. Stock cam and ls1 intake.

Oct 2, 2003 | 08:45 AM

NA$TY-TA

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Re: MMS Crank Pulley and Boost.

Thanks Bos for your input.
AZZHauler- You have seen 10psi... cool. Then i should be right were i wanted to be. I will be starting my 370ci project here soon so im not worried about running 10psi+. Besides my 10 bolt cant take the 7psi i have now launching on the street on Nitto's. 9 inch time. We have pretty much the same setup beside my baby cam and my LS6 intake.
Thanks alot guys i got the answers i was looking for.

Oct 2, 2003 | 02:11 PM

AzzHauler

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Re: MMS Crank Pulley and Boost.

If you might be looking for more boost later, you might want to consider an 8 rib like some guys have here. That way you only have to get a new blower pulley later.

Oct 2, 2003 | 02:15 PM

NA$TY-TA

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Re: MMS Crank Pulley and Boost.

Ill look into an 8 rib if i still see slip after this install. I already have a 3.2" pulley just sitting around. It was only on the car for about three weeks..