3.33" to 3.12" pulley - MustangForums.com

Notices
4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

3.33" to 3.12" pulley

Reply

 
 
 
Old 05-16-2009, 11:56 AM
  #1  
Mustang_NTriangle
5th Gear Member
Thread Starter
 
Mustang_NTriangle's Avatar
 
Join Date: Nov 2006
Location: MA
Posts: 2,402
Default 3.33" to 3.12" pulley

I have a 3.33" pulley and changing to a 3.12" do I need a smaller belt? If so, what size?
Mustang_NTriangle is offline  
Reply With Quote
Old 05-16-2009, 01:49 PM
  #2  
Sxynerd
6th Gear Member
 
Sxynerd's Avatar
 
Join Date: Feb 2006
Location: Virginia
Posts: 11,783
Default

The tensioner should take care of it but what size belt do you have right now?
Sxynerd is offline  
Reply With Quote
Old 05-17-2009, 09:20 AM
  #3  
MAD SVT
4th Gear Member
 
MAD SVT's Avatar
 
Join Date: Jan 2009
Location: California
Posts: 1,092
Default

^+1 sounds like the tensioner would do it, but if its loose, id go 1" smaller... you could probably get away with 2" but it may be reeeal tight to get on.
MAD SVT is offline  
Reply With Quote
Old 05-17-2009, 01:30 PM
  #4  
texas_stang02
3rd Gear Member
 
texas_stang02's Avatar
 
Join Date: Jan 2008
Location: Houston TX
Posts: 732
Default

not related to your question, but how much boost were you seeing with the 3.33" pulley?
texas_stang02 is offline  
Reply With Quote
Old 05-17-2009, 08:19 PM
  #5  
Mustang_NTriangle
5th Gear Member
Thread Starter
 
Mustang_NTriangle's Avatar
 
Join Date: Nov 2006
Location: MA
Posts: 2,402
Default

Originally Posted by texas_stang02 View Post
not related to your question, but how much boost were you seeing with the 3.33" pulley?
10 PSI.
Mustang_NTriangle is offline  
Reply With Quote
Old 05-17-2009, 09:32 PM
  #6  
jvog
5th Gear Member
 
Join Date: Mar 2008
Location: PA
Posts: 2,825
Default

Originally Posted by Mustang_NTriangle View Post
10 PSI.
Must be nice..I am only seeing 7ish PSI
jvog is offline  
Reply With Quote
Old 05-17-2009, 11:41 PM
  #7  
2000AZ5.0GT
5th Gear Member
 
2000AZ5.0GT's Avatar
 
Join Date: Jul 2007
Posts: 3,731
Default

Originally Posted by jvog View Post
Must be nice..I am only seeing 7ish PSI

what else do you have done to your car?

7PSI at 370rwhp is pretty damn efficient.
2000AZ5.0GT is offline  
Reply With Quote
Old 05-17-2009, 11:45 PM
  #8  
jvog
5th Gear Member
 
Join Date: Mar 2008
Location: PA
Posts: 2,825
Default

Its intercooled with a powerpipe so I could see me gettin like 8 lbs, but when it was dynoed the highest the tuner said he saw was 6.8 lbs. Everything else on the motor is stock, which is why I figured I would have a higher psi if anything due to all the restrictiosn. I have an o/r h pipe and a catback which may free up the flow a little, but not that much.
jvog is offline  
Reply With Quote
Old 05-18-2009, 12:35 AM
  #9  
2000AZ5.0GT
5th Gear Member
 
2000AZ5.0GT's Avatar
 
Join Date: Jul 2007
Posts: 3,731
Default

that's crazy, because I'm running the T-trim (technically E trim (the V2 version (helical cut gears))) and a 3.4" pulley and running 16PSI and I can go all the way down to a 3.12 pulley and still going to 7000RPM without overspinning the blower, which I figured would be around 20 PSI


So you seeing only 7PSI is insane.

What year is your car again? I think cliffy K said that the 02+ cars had a little bit more agressive cam specs, which could explain loosing some through the exhaust valves.

IDK though, that's a tricky idea

Last edited by 2000AZ5.0GT; 05-18-2009 at 12:38 AM.
2000AZ5.0GT is offline  
Reply With Quote
Old 05-18-2009, 12:47 AM
  #10  
lizzyfan
Underboss
 
lizzyfan's Avatar
 
Join Date: Jan 2006
Location: Helaware
Posts: 20,280
Default

Originally Posted by jvog View Post
Its intercooled with a powerpipe so I could see me gettin like 8 lbs, but when it was dynoed the highest the tuner said he saw was 6.8 lbs. Everything else on the motor is stock, which is why I figured I would have a higher psi if anything due to all the restrictiosn. I have an o/r h pipe and a catback which may free up the flow a little, but not that much.
What size is your pulley?
lizzyfan is offline  
Reply With Quote

Thread Tools
Search this Thread
Quick Reply: 3.33" to 3.12" pulley


Advertising
Featured Sponsors
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.