Well its been a whole two weeks since conducting my last set of tests on my P650, so this morning I decided to get out and do some more testing. This time I tested a P700 belt that I recently installed on my P650 to see how it affects acceleration and top-speed as compared to a P650 belt.

TIMED RUNS
Below are the average timed results (running 3 timed runs each) that I recorded this morning to compare the differences in performance between the P700 belt (a new belt) and the P650 belt (which had 450 miles on it). All times were recorded using 4wd on an asphalt road with the DG holeshot module turned on (unless otherwise noted below). Also note that I have 25 inch tires and my clutches have the EPI black secondary spring and stock P700 primary spring (with 2 shims). Also note that the belt deflection was within spec for both belts during these test runs.


100 FOOT RUNS
P650 belt.........3.20
P700 belt..........3.21


300 FOOT RUNS
P650 belt..........6.42
P700 belt..........6.45


APPROX. 1/2 MILE RUNS TO MEASURE TOP SPEED
P650 belt/ 4wd...........59 mph
P700 belt/ 4wd...........60 mph

P650 belt/ 2wd...........60 mph
P700 belt/ 2wd...........61 mph

P650 belt/ 2wd/ low range......43 mph
P700 belt/ 2wd/ low range......45 mph


MY CONCLUSIONS:
With respect to the bottom-end acceleration of my quad, the P700 belt performs almost identical to the P650 belt. I was a little surprised at this result because I believed (in theory) that the additional width of the P700 belt might result in increasing the gear ratio upon take-off (and thus, I thought the 100 foot acceleration times with the P700 belt might be slower than the P650 belt). Nevertheless, my timed runs show no significant decrease or increase in acceleration times when using the P700 belt.

With respect to the top-speed of my quad, the P700 belt adds 1 mph to the top-speed in high range and 2 mph to the top-speed in low range. I'm not sure why the (1 mph) increase in high range top-speed wasn't equal to the (2 mph) increase in low range... unless it has something to do with the fact that I always hit the rev limiter when topping out in low range, but I don't hit the rev limiter when topping out in high range.

Next, I would REALLY LIKE to test the effects of the DG Unlimiter [img]i/expressions/face-icon-small-happy.gif[/img] ...but I guess I'll have to wait until its ready for sale to the public.

Happy trails...[img]i/expressions/face-icon-small-smile.gif[/img]

 

Thank you for posting your tests... I'd expect another 1-2 mph for the 360 belt... I didn't expect it to slow your acceration, as the 700 belt should still go through the full range of motion on the clutches, so the resulting gear ratios should stay the same... I'll bet K.O.D. has a new respect for posting test results, after doing his... I don't think, unless you've tried it, that you realize how much work goes into posting these kind of results... thanks again ...WAM

 

You got that right MIKE "aka newbeetle". I do respect anyone taking the time to do test.

Mikey, I got you in another forum but thanks again.

 

Mikey-- Thank you for your efforts, and time.