Underdrive crank pulleys - anyone interested???

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CT
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Underdrive crank pulleys - anyone interested???

Postby CT » Tue Oct 30, 2007 12:38 pm

GFB have shown some interest to make underdrive crank pulleys for the NA/NB series MX5s - if there is some interest, we can get them made for a reasonable price.

Anyone keen?

Benefits include spinning the accesories like power steering pump and alternator less in track conditions.
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SuperMazdaKart
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Postby SuperMazdaKart » Tue Oct 30, 2007 12:41 pm

they balanced too?
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Matty
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Postby Matty » Tue Oct 30, 2007 4:21 pm

SuperMazdaKart wrote:they balanced too?

They'll be balanced.

They won't dampen torsional ("harmonic") vibrations though. However this is really only a risk on forced induction MX-5s. Atmo engines can tolerate an undamped pulley far more readily.
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CT
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Postby CT » Wed Oct 31, 2007 9:39 am

Matty's right - I'm not a fan but I thought I'd ask on their behalf. I'd prefer a harmonic damper/underdrive pulley as a combo....
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Re:

Postby Okibi » Wed Oct 31, 2007 2:40 pm

CT wrote:Matty's right - I'm not a fan but I thought I'd ask on their behalf. I'd prefer a harmonic damper/underdrive pulley as a combo....


I seem to remember a guy on Club Roadster was looking at getting some of these made.
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Postby kula » Thu Nov 01, 2007 12:34 am

i may want an underdriven alternator..
main pully im not risking.
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CT
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Postby CT » Thu Nov 01, 2007 10:51 am

Im with you Mark - I'm going to look into an alternator and power steer replacement. Thanks for the confirmation on interest, I'll pass onto GFB not to waste their time.
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Postby green_comet » Thu Nov 01, 2007 11:34 am

http://www.srmotorsports.com/srmiataCooling.html

These blokes have a kit, but it aint cheap.
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Postby Rob E » Thu Nov 01, 2007 11:45 am

Yes, i would be keen
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