wow...I would bet that .1 of an inch if worth over 50+ degrees in Tepm increase..LOL j/k of course...for those that dont know me
c'mon guys...how much can this be covered??

 

 

DANGIT! LOL! I fixed it yet again

Well, .1 isn't going to be much difference heat wise probably. I believe it should be probably be between 6 to 8 degrees maybe since JDM's first #'s were 22 degrees with the 8" and only 9 degrees with the 7.8" (his outer measurements would have been 8.1 and 7.9, though).

Okay, that clear's it up, THANKS Spiro, bud

I'm rethinking my position on the pulleys again after researching and giving it some good hard thought. Forget everything I said previously and measure from the top of the grooves. Why? Because you know for a fact the belt contacts the highest point as evidenced by wear, and it is a relative measurement...all things being equal the ratio should be the same as long as you are consistent throughout, so to be accurate stick to a point you know the belt contacts on both pulleys. Most pulleys are engineered so that the grooves in them are deeper than the ones in the belt for that same reason of contact area I just gave, otherwise the belt would stand up off the pulley, and you would prone to massives amount of belt slip.

All in all PSP is doing the best of the two measurements, which is the TOP of the grooves.

BfB