underdrive pulley q's

RG.net · Postby **RG.net** » Tue Aug 05, 2008 10:52 pm

anyone run a underdrive pulley on here?

i have just a few questions,

1. do the na8 pulleys fit the nb8a?

2. what belt do you run?

3. do you run this belt with or without the a/c compressor

any info will be apprieciated

Woo · Postby **Woo** » Wed Aug 06, 2008 8:54 am

Unless you are building a short fuse motor or the crank has been tri-state balanced personally I would steer clear of them. They lack dampening and cause excessive wear on the main journals (esp for a big noise motor). I think you'd be better underdriving your accessories.

Sorry, didn't actually answer your questions

bruce · Postby **bruce** » Thu Aug 07, 2008 1:59 pm

There is no point running an underdrive pulley on a 5. I doubt it would give you any increase in power (what is 'power' in a 5?).

RG.net · Postby **RG.net** » Sun Aug 10, 2008 11:10 am

Old Fart wrote:Hi I investigated these pulleys. Beware, as UNORTODOX Racing 'see web site' stopped making them for MX5's and there must be a reason. There are some advertised on EBay and he used Unortodox's name in some ad's but ceased to do so.
Steve

i was actually considering IndigoSpeed (http://www.indigospeed.com/GTPullies.html) which kinda look like they are the accessory pullys, either way i will investigate further.