Guest gzaerojon Posted September 19, 2005 Share Posted September 19, 2005 i saw this and was just wondering if anyone has bought a set. i'm not sure if they do what they say they do but they look feckin BLING. shall i waste my money? Link to comment Share on other sites More sharing options...
Guest gzaerojon Posted September 20, 2005 Share Posted September 20, 2005 oops a link might help http://cgi.ebay.co.uk/Toyota-Supra-JZA80-underdrive-performance-pulley-kit_W0QQitemZ4576777425QQcategoryZ10428QQrdZ1QQcmdZViewItem Link to comment Share on other sites More sharing options...
Bob Posted September 20, 2005 Share Posted September 20, 2005 Heard bad things about lightened crank pulleys - something to do with not being dampened or somesuch thing - can shorten the life of the engine. On the celicas, the underdrive pulleys would cause vibrations that would eventually cause the oil pump to die horribly. Link to comment Share on other sites More sharing options...
uk-rich Posted September 20, 2005 Share Posted September 20, 2005 these pulleys are not really underdrive, they are the same size, but as they are made from aluminium are much lighter, and take less effort for the engine to turn them, like a light weight flywheel Link to comment Share on other sites More sharing options...
gregsupra4 Posted September 20, 2005 Share Posted September 20, 2005 Hi all, We have fitted these to both mine and Samsupra37s cars and fingers crossed they seem to be fine. Not done that many miles yet so much to early to tell. Will post if any problems come up. Link to comment Share on other sites More sharing options...
Guest Terry S Posted September 20, 2005 Share Posted September 20, 2005 ........harmonics........... I an a Unorthodox Racing one for years without a problem, but thats more luck than judgement maybe....... Link to comment Share on other sites More sharing options...
JohnA Posted September 20, 2005 Share Posted September 20, 2005 It's not just harmonics, there are all sort of weird stresses applied on these pulleys, that sloppily-designed (and perhaps machined) units may not sustain for long. And if they really *are* underdrive, then I'd wonder if the battery/alternator/electrical/PAS systems are really all that over-specced from the factory. They also claim 5-8bhp gains, which is a cloud coockoo-land estimate [/victor meldrew] Link to comment Share on other sites More sharing options...
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