low boost?'s

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11-30-2003, 11:18 PM
hairdryer

low boost?'s

I am not getting very much boost out of this P1SC. I have a 3.5" driven pulley and no belt slip, I get only 9lbs and I am redlining the blower.

Is my engine too big for this little blower.
383sbc, afr 220, 630 solid roller.
12-20-2003, 02:52 AM
ScaryGT

Quote:

Originally Posted by hairdryer

I am not getting very much boost out of this P1SC. I have a 3.5" driven pulley and no belt slip, I get only 9lbs and I am redlining the blower.

Is my engine too big for this little blower.
383sbc, afr 220, 630 solid roller.

You can get a smaller pulley, that would give you more boost. The pulleys are actually 3.4, 3.30, and 3.2 from ATI those should be good for (8, 10, 12lbs). I know that on my 3.4" pulley I usually see close to 10lbs at the top of my rpm range.

Good luck, Ralph
12-20-2003, 09:27 PM
hairdryer

Quote:

Originally Posted by ScaryGT

You can get a smaller pulley, that would give you more boost. The pulleys are actually 3.4, 3.30, and 3.2 from ATI those should be good for (8, 10, 12lbs). I know that on my 3.4" pulley I usually see close to 10lbs at the top of my rpm range.

Good luck, Ralph

I got the problem fixed, I got a 3.4 pulley and my inlet hose was too turbulent, I now see 13lbs at 7000rpm's. I also got a new time 9.80 at 138.

Now my concern is am I spinning the blower too fast, and will it hurt it.
01-01-2004, 10:39 PM
ScaryGT

Quote:

Originally Posted by hairdryer

I got the problem fixed, I got a 3.4 pulley and my inlet hose was too turbulent, I now see 13lbs at 7000rpm's. I also got a new time 9.80 at 138.

Now my concern is am I spinning the blower too fast, and will it hurt it.

If you know size of your crank pulley you can probably use this formula that I posted for another thread. It will tell you if you are over revving your blower.

http://www.superchargerhelp.com/showthread.php?t=3570

Good luck, Ralph
01-18-2004, 05:06 PM
wilecoyote

Quote:

Originally Posted by hairdryer

I got the problem fixed, I got a 3.4 pulley and my inlet hose was too turbulent, I now see 13lbs at 7000rpm's. I also got a new time 9.80 at 138.

Now my concern is am I spinning the blower too fast, and will it hurt it.

You are nowhere close to max boost on the P-1SC, its' rated well over 20psi max, unlikely you are going to hurt your "little" blower...... If you are worried go by yourself an F1/F3 and be doen with it!! Great numbers.....stevet