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Underdrive crank pulleys - anyone interested???
Posted: Tue Oct 30, 2007 12:38 pm
by CT
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.
Posted: Tue Oct 30, 2007 12:41 pm
by SuperMazdaKart
they balanced too?
Re:
Posted: Tue Oct 30, 2007 4:21 pm
by Matty
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.
Posted: Wed Oct 31, 2007 9:39 am
by CT
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....
Re:
Posted: Wed Oct 31, 2007 2:40 pm
by Okibi
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.
Posted: Thu Nov 01, 2007 12:34 am
by kula
i may want an underdriven alternator..
main pully im not risking.
Posted: Thu Nov 01, 2007 10:51 am
by CT
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.
Posted: Thu Nov 01, 2007 11:34 am
by green_comet
Posted: Thu Nov 01, 2007 11:45 am
by Rob E
Yes, i would be keen