Originally posted by khyber
Centax Clutch ? ..... hmmmmm but we run our car in a small and technical track here. The gearing for centax seems to high and the acceleration seems slow and no power coming out of the corner. That is why I use combination of 12/15 and 50/47 gearing with standard clutch. Could that be the reason I broke my spring? I don't think I broke my spring that often when I use 13/16 and 50/47 gearing before
It's probably slipping too much at a higher engine RPM when using 12T/15T.
Ummm, I'd like to know how other guys at your small technical track are running 705s equipped with Centax clutches...
There are a few ways of getting lower ratios in the Centax clutch. Please refer to some of my earlier post. One of them is to get hold of the 13T/16T fixed pinion old style Centax clutchbell.
There is also a post of mine somewhere which states how to convert to a higher internal gearing ratio (i.e. from 2 to 2.14) by using the 22T brake pulley, 47T diff pulley and 17T side pulley. I believe almost all the 705s running there in small tracks are using this... You will also need to mod your 2 speed shaft to take the 17T side pulley and the aluminum pulley adapter... The 22T brake pulley is also mounted differently. You need a pulley adapter for that too...
You will have problems converting your 46T diff pulley to 47T if you're using the standard Impulse PRO rear gear diffs. There is no 47T part for that... If you want the 47T, you need to get at least the ball diff (as in the 705) or the FPS diff.
Alternatively, if you want a lower ratio (2.27), I have also mentioned earlier before the things you need to get and do to achieve it. It will make your 15T/18T Centax pinions with 50T/46T spurs final drive ratios like as if you were running 13T/16T pinions with 50T/46T spurs