XRAY - Model racing cars

Hi guys to took my clutch bell of to check my clutch, the spring preload seems to be a bit too much, its 2.5mm from the end of the spring collar to the end of the threads, I thought this distance was supposed to be about 1.6mm, however this said, my clutch seems to engage earlier than some of the other cars, which is the opposite to what i was expecting. It had a new clutch shoe and weights recently, the shoe is the yellow harder shoe which seems slightly thicker than the standard one could this maybe be the problem?

Be sure to set the gap right, with a to small gap indeed you do need to tighten up the preload

There is a saying "You learn something every day". Well I've learnt something today and that is I didn't think it was possible to run a clutch set at 2.5 mm spring loading. To suggest it is engaging more quickly than some of the other competitors is truely amazing. We normally run 1.2mm to 1.3mm with a 1.9mm spring and yellow shoe. If we tighten it a mm or so more it will slip.

Whilst we are on clutches. Most people tell me that if you want a clutch with good punch then the yellow shoe (harder than white) is better. Is it not the case that when a soft shoe engages with the bell the clutch will be more instant and give more punch. It seems logical that a softer shoe will slip less than a hard shoe but will wear more quickly.

What do the experienced guys think?