10psi Pulley Question!
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From: Western MD
Originally Posted by FF2Skip,Jun 18 2005, 10:56 AM
BTW, can someone show me where they found that the Novi 1000 can efficiently handle up to 14psi of boost? Thanks.
Novi 2000
1700 CFM
Discharge 3.0" OD and 2.6" ID
Max 27 psi
http://www.paxtonauto.com/superchargers.as...=GetRecord&ID=3
Novi 1000
850 CFM
Discharge 3.0" OD and 2.6" ID
Max ?? psi
http://www.paxtonauto.com/superchargers.as...=GetRecord&ID=1
The Novi 1000 sucks in half the volume of air as the Novi 2000, and is discharging the compressed air through the same size ID.
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From: Lewisville, TX
Thanks, Kevin. Because I have no knowledge in this area, I'm wondering if the relationship proportional in a 1:1 ratio as you have summized.
Here's why I ask... a 4" pulley for the CTsc equates to 7lbs of boost and the 3.5" ~ 9lbs. If you follow the pattern, you would assume that another .5" reduction in size would generate an output of 2lbs more of boost, but it does not. It's closer to 14lbs- an increase of 5lbs.
Here's why I ask... a 4" pulley for the CTsc equates to 7lbs of boost and the 3.5" ~ 9lbs. If you follow the pattern, you would assume that another .5" reduction in size would generate an output of 2lbs more of boost, but it does not. It's closer to 14lbs- an increase of 5lbs.
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From: Western MD
Skip, I think the efficiency of the blowers is a 1:1 because it refers to a volumetric measurement. Changing pulley size decreases the circumference of rotating mass. 4" to 3.5" is a 12.5% decrease in circumference of RM...3.5" to 3.0" is a 14.3% decrease. Decreasing pulley size will increase RM velocity (and boost levels) exponentially.
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From: Lewisville, TX
Originally Posted by itsallforyou,Jun 19 2005, 09:55 AM
Skip, I think the efficiency of the blowers is a 1:1 because it refers to a volumetric measurement. Changing pulley size decreases the circumference of rotating mass. 4" to 3.5" is a 12.5% decrease in circumference of RM...3.5" to 3.0" is a 14.3% decrease. Decreasing pulley size will increase RM velocity (and boost levels) exponentially.
That is how I explained it to another member... % of change. 
Either way, I feel 3.25" was as small as I wanted to go- no sense on completely maxxing out the blower.Also, somebody had down some calcs based on rpm's and other factors. The smallest pulley size the figured was 3.19". I haven't been able to relocate that particular thread.
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From: South of the pier, Huntington Beach, CA
Originally Posted by Eri_S2k,Jun 19 2005, 08:46 AM
OK! So all i got to do! Is Give them a call and request a 3' inch pulley for the Paxton Novi 1000 And Thats All?
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From: Lewisville, TX
Originally Posted by Eri_S2k,Jun 19 2005, 10:46 AM
OK! So all i got to do! Is Give them a call and request a 3' inch pulley for the Paxton Novi 1000 And Thats All?
Talk to Lee... tell him where you heard about them. You might want to check with Ztec- I believe he can confirm that his 3" pulley is rated to be 14psi for the CT SC.aspracing.com
Edit:
Either my keyboard is jacking up or the idiot pecking at it is!
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Originally Posted by FF2Skip,Jun 19 2005, 09:13 AM
What Sideways said! Talk to Lee... tel him where you heard about them. You might want to check with Ztec- I believe he confirm that his 3" pulley is rated to be 14psi for the CT SC.
aspracing.com
Talk to Lee... tel him where you heard about them. You might want to check with Ztec- I believe he confirm that his 3" pulley is rated to be 14psi for the CT SC.aspracing.com
Whats that? do they sell a 3' Pulley?
I'm Callin Lee Tomorrow!
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Originally Posted by FF2Skip,Jun 19 2005, 10:41 AM
Ztec is a board member from Florida. Use the PM function. 
You know sometimes is a Little Difficult to be Outside the States and get what you need! Specialy for the S2k....
