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Real Clutch Temps Data

stevewithOCD said:
More stuff today boys. I have "regular" trail riding temps.
I will use stock set up tomorrow for final analysis.
I have come to some conclusions also. Yes the 8JP outperforms the 8DN, but i will have an 8DN as a third belt on me at all times. The 8DN with this last set up was soft on bottom, took a half second more to get up to 9000 rpm's & was 4 mph slower on top. It actually runs good & is hard to tell, but i had the 850 pull up to me & then i cut him loose. I would then chase him down judging gain rate & how long it took to over take him. I did this throughout the day. With 8JP it was instant. With 8DN it was not. BUT this belt ran cool at EXTREME riding & for most riding is very good. I'm assuming this belt will last a lot of miles.
Here are some numbers & will explain later.

My set up for today:
-stock with stock track & 96 studs
-165 pound rider with 30 pounds extra
-clutch center to center =262mm
-offset=60.5mm
PRIMARY:
-TP Orange spring
-HH weights with just aluminum mid 3/8ths bolt
-TP rollers & 911 adjustable cover
SECONDARY:
-TP Orange spring
-33/35 helix wrapped at 30
-TP rollers
-OSP adjuster

8JP with 650 miles on it this morning: "regular" riding freshly groomed & loose
Primary =105/ 95/ 99
Secondary=100/ 110/ 110
Belt =170/ 165 /170
RPM's =9200 then down to 9100. rode at 6000 to 7000 for most of these runs

8JP after 750 miles i went postal on this belt for 50 miles over 8000 rpm's
P=115
S=120
B=180
RPM's=9100 then down to 9000
Top Speed seen on speedo=99 mph

8DN "regular " riding
P=105
S=115
B=160
RPM=6000 to 7000

8DN going postal. This run was absurd.
P=125
S=150
B=160
RPM's=9000 down to 8900
Top Speed seen=94 mph

A couple of notes here. I knew i'd be over-revving & saw 9400 rpm's a few times, but i wanted to over achieve today & bring rpm's down later.
I tried some "regular" trail riding temps. I've been called a Hummingbird on Crack before so i don't do anything "slow"!
The 8JP pulls were hard pulls then i settled at 6000 to 6500 rpm's for 15 minutes thinking the belt would cool, but it didn't. The clutches cooled, but not the belt telling me maybe some vents are in order here.
The 8JP clutches were almost cold. 99 degrees? SERIOUS? If my mom used a Rectal Thermometer on me; i'd be going to school that day!
She still has that Thermometer by the way.
The 8JP was pulling hard. I mean scary.
At 750 miles & a BIG 50 mile run from Kakadjo to Pittson Farms up next, i tried to blow the belt. I beat it like a Red Headed Step Child! I ran five 4 mile pulls over 8000 rpm's. I locked up the brakes getting sideways then nailed it 3 times. I ran it off trail in deep snow for a minute pulling 9400 rpm's. I ran it full WOT for as long as i could safely. 2 moose & a gaggle of deer slowed this run twice, but i COULD NOT BLOW THIS BELT!
The last time here i GRENADED my first belt last year going half the speed. I gapped my friend so bad, after a Reeses, water, jerky & drained the vain he pulled up.
On the way home i abused the 8DN maybe even worse. I'm not proud of it...............well......actually i am.

ANALYSIS:
-i think some venting may help
-8DN still looks good & most will not notice the performance drop
- i can put on 8DN without the clutch tools
- i run 8JP even with top of sheave & 8DN just above sheave. This made both belts even on bottom end, but not today
-top speed still has me concerned although i don't think i could run any faster even if i could. 40 to 90 is absolutely VISCIOUS for a stocker!

TOMORROW:
Primary:
-stock weights
-stock spring with TP glide washers
-TP 911 cover & rollers
Secondary:
-stock spring
-TP rollers
-33/35 helix wrapped at 60

I will try both belts again, but this time i will try NOT to go Apeshit first.
I have a new 8JP for fair testing.

BTW: my Doo buddy's Etec has been broken so he rode my 'Winder for the day & the 850 for the day.........he just bought a Sidewinder!

Tomorrow i will post STOCK results.
Click to expand...

We need more OCD guys on here like you and Dan!:rofl: I have my clutches running super cool now with the Dalton B/O secondary spring and stock 35 helix. You have your Heavy Hitter weights set up really light Steve. I have 3.3 g heel 2.6 center and 4 grams in the tip and I'm running 8800-8900 RPM. I'm sure you would be much faster if you add some weight and get those R's down.

I have been reading all the posts of guys trying different belts and I'm still on my 8JP with 2200 miles on it and it still looks great. I have very little belt dust and now cool running clutches. My clutches with the TP Orange secondary @ 3-3 and 33/35 helix was running very very hot.
 

Be interesting to see if he adds more weight and goes faster- and if adding more weight increases clutch temps- which would be an indication that more helix is needed or less driven tension needed to keep up with primary’s quicker upshift....

GOOD STUFF
 
XP123 said:
We need more OCD guys on here like you and Dan!:rofl: I have my clutches running super cool now with the Dalton B/O secondary spring and stock 35 helix. You have your Heavy Hitter weights set up really light Steve. I have 3.3 g heel 2.6 center and 4 grams in the tip and I'm running 8800-8900 RPM. I'm sure you would be much faster if you add some weight and get those R's down.

I have been reading all the posts of guys trying different belts and I'm still on my 8JP with 2200 miles on it and it still looks great. I have very little belt dust and now cool running clutches. My clutches with the TP Orange secondary @ 3-3 and 33/35 helix was running very very hot.
Click to expand...
You ever try running your heavy hitters empty or very light in middle hole and more tip weight? Sounds like you have it dialed in. I prefer most of the weight to be loaded into the tip. A lot of variables with set ups. Been running HH for many years. And like setting them up very light in the middle and tip loaded heavy.
 
jonlafon1 said:
You ever try running your heavy hitters empty or very light in middle hole and more tip weight? Sounds like you have it dialed in. I prefer most of the weight to be loaded into the tip. A lot of variables with set ups. Been running HH for many years. And like setting them up very light in the middle and tip loaded heavy.
Click to expand...
No I never tried that. What does it do? I was told if you are too light in the middle you will run too high rpm's mid range. This is my first time using heavy hitters so I have no real experience with them.
 
XP123 said:
No I never tried that. What does it do? I was told if you are too light in the middle you will run too high rpm's mid range. This is my first time using heavy hitters so I have no real experience with them.
Click to expand...
Yes it will rise your rpm mid range depending on HELIX ANGLE. I like it very light or empty in middle. I find at 50-60 mph you punch it it has tons of mid range pull. I just have always loaded the tip MORE then middle. If you like your set up and your happy leave it. Just throwing it out as a idea if you like try different set ups. Nothing wrong with your set up.
 
Hot belt cool clutches, what y’all think is going on here?
 
8dn is getting hotter now. 8jp is looking pretty good. (Hint)
 
Jon how are you getting pull in mid with no weight in the middle? You're not over revving before full shift?
 
fatchance said:
Jon how are you getting pull in mid with no weight in the middle? You're not over revving before full shift?
Click to expand...
Yes it over revs a smidge. But when that weight gets shifted hard on the punch it's the tip weight that grabs the belt hard and gives grip and pulls. With a straight 38 and HH you have to load middle light. Otherwise it's to low when cruising at 50-60 mph. Good for gas mileage but doggy in the middle. A lot of variables here. Studs, tune, helix and BOTH SPRINGS. It's a different set up when the angle stays the same(helix) the ENTIRE shift out. Make any sense?? Hell sometimes I wonder myself. Lol
 
I think that would be great for the big sweeping trails, but not so much for the tight twisty stuff i ride on. If i'm going 30 MPH i'm flying at times! I actually think i would like some more heel weight! Running 41/37 now
 
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