Need More Boost
Need More Boost
05-16-2005, 03:15 PM
#6
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The internal blower speed should not exceed 16,000 rpm. That works out to be around 10psi. After that you run the risk of the blower's internals hitting each other or throwing a bearing. 10psi is all you'll get safely from the 62 series blower. Time to step up to a MP90 where you'll get 15psi. A smaller pulley can be made though...although I wouldn't suggest it. Contact www.pulleyboys.com
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05-17-2005, 12:59 PM
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Originally Posted by Smitty
have fun trying to fit the MP90 under the hood.
The physical size of the two blowers are not that different although the MP90 is considerably wider than the MP62 (by 12"):
05-17-2005, 02:58 PM
#11
05-17-2005, 02:59 PM
#12
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How on earth are you running 10psi right now on 91-octane?!?! I have to retard timing at 6psi.... we do have the same engine, right? 
I think its the difference in air-flow.... I don't think the S/C flows the same amount of air as a turbo.
I think its the difference in air-flow.... I don't think the S/C flows the same amount of air as a turbo.
05-17-2005, 03:31 PM
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Based on my calculations, with the following parameters (which is what is provided with Scalbert's IC kit):
7" Crank pulley
3.275" Alternator pulley
3.3" SC Shaft pulley
The blower spins at the following speeds:
I'm no math wiz so these calculations could be completely off... but I based this off a calculator for the RSX kit which also uses the MP62 blower.
7" Crank pulley
3.275" Alternator pulley
3.3" SC Shaft pulley
The blower spins at the following speeds:
I'm no math wiz so these calculations could be completely off... but I based this off a calculator for the RSX kit which also uses the MP62 blower.
05-17-2005, 04:24 PM
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I tweaked it a little bit so it should be reading accurately now. Basically with Scalbert's combination of pulleys you are pretty damn close to the max rpm that Eaton's graphs hit for the MP62. Notice they all stop at 16,000 rpm
Delta P: Pressure Difference
Volumetric efficiency: Efficiency with which engine can move air in and out of combustion chamber. 100% = as much mix goes in as volume of combustion chamber is.
Delta P: Pressure Difference
Volumetric efficiency: Efficiency with which engine can move air in and out of combustion chamber. 100% = as much mix goes in as volume of combustion chamber is.
05-18-2005, 08:44 AM
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Originally Posted by Chemmech
Where can I get a pulley for the S/C'er to get past 10 Psi?
Payne Technology in Florida.... I believe that is where we got the pulley made for the Supercharger jack shaft.
05-18-2005, 12:11 PM
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PM Scalbert or Modaddict...Essarack sent me his pulley... I sent it off to Steve who in turn sent it off to payne tech.
they have the specs on the pulley.. I am sure they could help you..
05-18-2005, 01:16 PM
#19
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the fact that you're wanting more boost makes me wonder how well your car is running.
you should have at least 350 whp, right?
have you dyno'd your car lately to see what it's putting down?
you should have at least 350 whp, right?
have you dyno'd your car lately to see what it's putting down?
05-18-2005, 07:33 PM
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https://acurazine.com/forums/showthread.php?t=167841
oh we are all aware of that...
you ALOT of luck... 
oh we are all aware of that...
you ALOT of luck...
05-18-2005, 08:21 PM
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Originally Posted by mrsteve
I thought they were in Michigan, not Florida.
Sorry for not having any more updates on the car. Maybe I can pick it up tomorrow or Friday (I'm not holding my breath).
05-18-2005, 10:52 PM
#28
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holy zero clearance piston, batman!
05-20-2005, 06:40 AM
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Originally Posted by mrsteve
Do you know the diameter of the Payn tech pulley?
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