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Sprintex Series 5 supercharger Pulley info
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Posted 6/9/2011 19:17 (#13561)
Subject: Sprintex Series 5 supercharger Pulley info



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Location: An island off southern Tasmania.		Changing the standard pulley of 76mm diameter for a smaller pulley yields more boost.

The stock 76mm pulley yields about 6-7 psi depending on the dyno operator.



I am currently running the 65mm pulley and getting 10 psi at redline....(10 psi is not recommended for a stock 6G75 engine...I would not go below a 70mm pulley).


It costs around $300 to have a pulley machined from the attached engineering diagram.

I used Robert Lange Engineering in Geelong....they have a billet CNC machine in house.

Here is the info for making a pulley...just vary the diameter to suit.

Also is a picture of the tool needed to remove the pulley from the blower neck.

A 65mm is the smallest pulley that will fit, even then some shaving of the neck with a grinder was required.

You will need to get a smaller 6PK belt...Repco sell them (they are a Gates product)...around $40.

Of course don't even think of adding boost without replacing the 7th injector with a larger one, as mentioned elsewhere on this forum.





Attachments
----------------
Attachments Sprintex-Pulley removal tool.pdf (164KB - 651 downloads)
Attachments Sprintex series 5 pulley-214P6011_REV-C_05-04-2011.pdf (159KB - 786 downloads)
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wsbtt
Posted 6/9/2011 22:22 (#13562 - in reply to #13561)
Subject: Re: Sprintex Series 5 supercharger Pulley info



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Location: Brisbane,qld		Cheers for that , ill add that to my list of mods, any idea what psi a 70mm pulley will pump out
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Administrator
Posted 6/9/2011 23:11 (#13564 - in reply to #13562)
Subject: Re: Sprintex Series 5 supercharger Pulley info



Frequent flyer Gold

Posts: 1093
10005025555
Location: An island off southern Tasmania.
wsbtt - 6/9/2011 22:22

Cheers for that , ill add that to my list of mods, any idea what psi a 70mm pulley will pump out



8 psi at redline.
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