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How much boost should I be making? P1SC-1, stock LS1 w/ blower cam.

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Old 08-26-2011, 12:19 AM
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Default How much boost should I be making? P1SC-1, stock LS1 w/ blower cam.

Just curious about how much boost you guys think I should be making. I'm new to Prochargers in general and just bought a car.

00 SS-
Full boltons: long tubes/ory/cutout/catback
Thunder Racing "TR Blower" - 214/230 .601/.579 117 LSA
P1SC Procharger /w Front Mount intercooler & red Race BOV
LS6 Intake Manifold

6 rib setup with the stock 6.XX crank pulley and a 3.25 blower pulley. The boost gauge runs right up to 6lbs at 6200rpms. I'm about to order an 8 rib setup and a meth kit to try to find some more power but I want to make sure that ~6lbs is where this should be at. It seems a little low to me, but I know the engine should be a good bit more efficient than a stock setup. I replaced the belt when I got the car and I have it pretty snug. Bob@ brute speed said "guitar string tight," I have it pretty tight but not LITERALLY that tight.

Thanks for any input!
Old 08-26-2011, 01:26 AM
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I have a p1sc1 and on the 6rib yet with the chevy Chad mod and I'm seeing 4psi at 5200rpms. That's with a 3.85 blower pulley I wanna get a 3.2 or a 3.1 and try to get 10psi out of it. I think with that 3.2 u should be around 8-9psi
Old 08-26-2011, 01:28 AM
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What other mods? Boltons? Cam?
Old 08-26-2011, 03:12 AM
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Originally Posted by FlashLCD33
What other mods? Boltons? Cam?
Full bolt ons, brute speed blower cam, 4150 single plane intake w/ 90mm TB, FMIC, big red bov, full fuel system u know the norm
Old 08-26-2011, 09:49 AM
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I bet your belt is slipping with the pulley
Old 08-26-2011, 11:57 AM
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Thanks guys I guess ill tighten the belt some more and try it. I have t clamps on all of the intake plumbing so I don't think that's an issue.
Old 08-26-2011, 12:40 PM
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For whatever its worth, my p1sc made 12-15lbs on a bone stock 4.8 in my pickup a while back.
Old 08-26-2011, 08:05 PM
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Originally Posted by FlashLCD33
Just curious about how much boost you guys think I should be making. I'm new to Prochargers in general and just bought a car.

00 SS-
Full boltons: long tubes/ory/cutout/catback
Thunder Racing "TR Blower" - 214/230 .601/.579 117 LSA
P1SC Procharger /w Front Mount intercooler & red Race BOV
LS6 Intake Manifold

6 rib setup with the stock 6.XX crank pulley and a 3.25 blower pulley. The boost gauge runs right up to 6lbs at 6200rpms. I'm about to order an 8 rib setup and a meth kit to try to find some more power but I want to make sure that ~6lbs is where this should be at. It seems a little low to me, but I know the engine should be a good bit more efficient than a stock setup. I replaced the belt when I got the car and I have it pretty snug. Bob@ brute speed said "guitar string tight," I have it pretty tight but not LITERALLY that tight.

Thanks for any input!
The P-1SC does not put out as much boost as the P-1SC-1 with any given pulley size. With the mods you have and with the 6 ribs tiny 6.00 crank pulley I would say you're doing pretty well getting 6 psi of boost with the 3.25 pulley. Wipe down the ProCharger head unit and keep an eye on it for black dust, which is an indication of belt slippage. Bob

How much boost the blower can produce depends on many variables.
* Cubic inch. The larger the engine the less boost it will make with a supercharger.
* Headers and exhaust. A better flowing system will produce less boost, requires a smaller pulley to regain the loss in boost. Ultimately though, more power will be gained.
* Camshaft and heads. A camshaft with some overlap will leak out some boost through the valves. Better flowing heads react a lot like a better flowing exhaust system.
* Altitude. Elevation plays a big part in how much boost is produced. Those people living in the higher elevations have to spin the blower harder to see boost.
* Condition of engine. An engine with real good sealing rings will ultimately produce more boost than one with worn rings.
* Rpm. An engine that is spun up higher in the rpm range will normally produce more boost.
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Old 08-27-2011, 02:38 PM
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Thanks Bob, this is the p1sc1. I found a spot was a vacuum cap was missing and it's now a little over 7lbs. I don't think the belt is slipping either. And im about 2200'. Thanks!
Old 08-31-2011, 10:48 AM
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Originally Posted by FlashLCD33
Thanks Bob, this is the p1sc1. I found a spot was a vacuum cap was missing and it's now a little over 7lbs. I don't think the belt is slipping either. And im about 2200'. Thanks!
You're welcome, your elevation is putting a hurt on the boost, 7 psi isn't bad at all for your combination. Bob
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Old 09-01-2011, 11:43 AM
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FWIW - When i had my camaro i was full bolt-ons, 01 z06 cam, 6rib P1 with a 3.0 pulley and i was seeing 9psi and making 523rwhp thru a 9in
Old 09-01-2011, 12:05 PM
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I have a brand new 3.40" 6-rib pulley I'll sell ya



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