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04-11-2010, 09:16 AM
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#21 |
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Turbo 3.5L LX9
 
AKA: Steven
Join Date: Jun 2004
Location: Shakopee, Minnesota
Age: 39
Posts: 137
Vehicle: 2000 Grand AM GT
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Yes it does sound like a pissed off weasel
 i'm an optimisic peson but it makes me want to thong there is something seriously wrong and no oil flow or something messed up inside |
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04-11-2010, 11:41 AM
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#22 | |
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GAGT - Senior Member
 AKA: Phil
Join Date: Mar 2005
Location: Fort Wayne, IN
Age: 37
Posts: 1,107
Vehicle: 2001 Grand Am GT Coupe
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Quote:
When you add everything up you will see why the RSM/Z-Spec kit will fail: The biggest problem is that the bearing is not pressed onto the drive shaft and the shaft spins inside the bearing. The other major flaw is that RSM only utilizes one 1630 series bearing, which is rated at a max of 6,000 RPM. When you do the math to determine how fast the pulley is spinning you will see that the supercharger pulley is spinning nearly two and a half times faster than the speed rating of the bearing. Mathematical Calculations: Crank pulley = 6.5" RSM supercharger pulley = 2.5" Shift Point = 5,600 RPM 5600 RPM X 6.5 =36,400 36,400 / 2.5 = 14,560 14,560 RPM is the speed that the supercharger pulley is spinning when the engine is at 5,600 RPM... remember the bearing is rated to 6,000 RPM! This combined with the fact that there is no flex coupling on the drive shaft, and the shaft is not balanced gives cause for catastrophic failure.
__________________
"The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power." ~John Lingenfelter |
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04-11-2010, 02:24 PM
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#23 |
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Turbo 3.5L LX9
AKA: Steven
Join Date: Jun 2004
Location: Shakopee, Minnesota
Age: 39
Posts: 137
Vehicle: 2000 Grand AM GT
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Yay. Plus my cars shift point is at 6k so that can't be good. Well I was curious to what these things normally sound like because it sounds pissed off. It's got a loud whistle and just sounds anger. I get lots of stares, it really sounds like a 60s car with a loud whistling charger but i didn't think this would be so loud. Anyone out there ever have these and know what I mean
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06-23-2010, 03:05 PM
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#24 |
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Turbo 3.5L LX9
AKA: Steven
Join Date: Jun 2004
Location: Shakopee, Minnesota
Age: 39
Posts: 137
Vehicle: 2000 Grand AM GT
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so just an update,
i've put about 1.5k miles on the supercharger with no problems. im going to get a new bearing just in case and a smaller pulley. At the moment i can rev it from neutral and hit 8 psi, boost 6 psi in second, and hit about 4 psi in third gear. |
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06-23-2010, 04:30 PM
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#25 |
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Boostin'
AKA: Dustin
Join Date: Sep 2009
Location: eaton, ohio
Posts: 294
Vehicle: 1999
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8psi in neutral????? you shouldnt build boost in neutral
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06-25-2010, 05:45 PM
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#26 |
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Turbo 3.5L LX9
AKA: Steven
Join Date: Jun 2004
Location: Shakopee, Minnesota
Age: 39
Posts: 137
Vehicle: 2000 Grand AM GT
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Oh no sorry I meant if I rev it in neutral.
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06-25-2010, 05:50 PM
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#27 |
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Turbo 3.5L LX9
AKA: Steven
Join Date: Jun 2004
Location: Shakopee, Minnesota
Age: 39
Posts: 137
Vehicle: 2000 Grand AM GT
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I've decided to go with an intercooler before a smaller pulley. Did some data logging today and maxed 162 degrees for the in coming air. Cooled off to about 115 coasting and sits at about 90 degrees at a stop light. Can anyone tell me if that sounds average or too high with boost?
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