97 vmax clutch questions

I am using the clutch set up found on this site. In my primary I was thinking of adding A little stiffer spring.Would this make the engine engage at a higher Rpm? Im using v-max johns setup. 2.4g in each hole.
Thanks for all the help

If your happy with the setup I would add a engagement washer under the spring..if I am not mistaken each is 100 rpm