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Prater

07-11-2006 03:52 PM

177 Blower Boost

My B&M blower is running the 10 rib belts and pulleys producing aprox 5 lbs of boost around 4000rpms up to 4900rpm. Does anyone have information on changing the pulleys for more or less boost and at what rpm range? I am new to supercharging and would like to have it for reference.

Thanks

rdoactive

07-12-2006 07:21 AM

Re: 177 Blower Boost

On my 525SCs, I went to the next smaller upper pulley. It gave about 7 lbs of boost.
But the supercharger was spinning REALLY fast. would reccomend leaving it at 5 lbs.

Back4More

07-12-2006 09:01 AM

Re: 177 Blower Boost

If your talking about the small B&M...its a 174.
I wouldn't push it any more than that...they are weak at best.
Now if its the weiand 177...you could drop a pulley size but it wont do anymore but 1 mph and eat more gas.

Prater

07-12-2006 09:28 AM

Re: 177 Blower Boost

Just curious. I will leave it alone.

Back4More

07-12-2006 03:02 PM

Re: 177 Blower Boost

Good choice.... :drink:

Shallow Minded

07-13-2006 04:41 PM

Re: 177 Blower Boost

I've got an older B&M 174, too. Can't get more than 5 lbs out of it no matter what, but it sounds best to leave it that way. It seems like it spins a lot the way it is... :eek:

Maybe just find a good 250 blower, generate less heat and burn more gas! :drink:

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