Some PB-80 testing also green sno-pro and dalton white

[woodysattak]

Well needless to say mother nature screwed us over again in southern WI. Saturday did some testing on the pb-80 and the green sno-pro and dalton white secondary spring. Conditions were not the greatest upper 30's and soft snow on the trails but had to get it done because trails were closing saturday night. This is with a stock tune winder. I tested the dalton white first and was snappy and backshifted pretty good wrapped at 9/1. I paired it up with the 35 helix. Dalton 70 empty. Was only pulling about 8600 in 800ft and 90 mph. It didn't seem to be pulling hard even though it was only turning 8600. The sno-pro green reacted the same. I know the conditions were not great but it did not feel right like it was fighting the side pressure of the spring. So I threw in the dalton black/orange wrapped at 6/2. Did the same run pulled about 85-8600 rpms and turned 93 in same distance. This spring seemed to allow it to upshift faster and felt like it was actually working the motor. I know it needs to pull more rpms. Thats why to me the heavier springs wont work. If I lighten up the weight to get more rpms It will upshift even slower. I can see where these springs work with big tunes because of the weight in primary will pull through the secondary pressure. On a stock tune I can't see the benefit except for backshift. Now for the pb-80. First setup 33/35 helix dalton black/orange 6/2 wrap. 108 grams in each puck with the 500/1300 spring. This setup had terrible slippage down low. The pb-80 does not grip the belt very good down low. So next I threw in a 41/35 helix everything else the same. It came out of the hole about 82-8300 and gradually climbed to about 8700 in about 700ft. Very smooth shift and seemed to be pulling hard. Checked the primary and it was somewhat hot but even my setup for the yamaha primary which ran just warm the weekend before was hot. The snow conditions were not good. The pb -80 was hotter but not alot. Next I threw in more weight up to 113 and lowered the helix to 37/35. Ran again came out of hole about 8400 and climbed to 85-8600 but did not seem to be pulling as hard felt like it was slipping. Checked clutch and was hotter than 41/35 setup. From what I can tell the pb-80 on the winder needs a steep helix and less weight compared to a lower helix and more weight to eliminate low end belt slippage. I am going upnorth in 3 weeks can't wait to try it out against my hh setup. It seemed to shift out very smooth with good pull. Also very quiet compared to the yammie primary. I know some maybe will disagree about the heavier side pressure springs but I feel they are not needed on a stock tune. Thanks.

 

[STAIN]

I think most of the talk about heavier springs where for tuned sleds. I agree that stock sleds don't need that much spring, but at 270++ you do....

 

[KnappAttack]

I remember running 110 G in my 1200 at 8400 RPM in 150 HP NA trim. After raising rev limiter I ran 98 G for 8900 RPM on the 150 HP NA sled.

1200 Doo 240 HP turbo setup I ran 142G @ 8200 RPM

1200 Doo 240 HP turbo setup @ 8900 RPM 128 G. all using PB 700-1300 spring.

 

[ClutchMaster]

Well needless to say mother nature screwed us over again in southern WI. Saturday did some testing on the pb-80 and the green sno-pro and dalton white secondary spring. Conditions were not the greatest upper 30's and soft snow on the trails but had to get it done because trails were closing saturday night. This is with a stock tune winder. I tested the dalton white first and was snappy and backshifted pretty good wrapped at 9/1. I paired it up with the 35 helix. Dalton 70 empty. Was only pulling about 8600 in 800ft and 90 mph. It didn't seem to be pulling hard even though it was only turning 8600. The sno-pro green reacted the same. I know the conditions were not great but it did not feel right like it was fighting the side pressure of the spring. So I threw in the dalton black/orange wrapped at 6/2. Did the same run pulled about 85-8600 rpms and turned 93 in same distance. This spring seemed to allow it to upshift faster and felt like it was actually working the motor. I know it needs to pull more rpms. Thats why to me the heavier springs wont work. If I lighten up the weight to get more rpms It will upshift even slower. I can see where these springs work with big tunes because of the weight in primary will pull through the secondary pressure. On a stock tune I can't see the benefit except for backshift. Now for the pb-80. First setup 33/35 helix dalton black/orange 6/2 wrap. 108 grams in each puck with the 500/1300 spring. This setup had terrible slippage down low. The pb-80 does not grip the belt very good down low. So next I threw in a 41/35 helix everything else the same. It came out of the hole about 82-8300 and gradually climbed to about 8700 in about 700ft. Very smooth shift and seemed to be pulling hard. Checked the primary and it was somewhat hot but even my setup for the yamaha primary which ran just warm the weekend before was hot. The snow conditions were not good. The pb -80 was hotter but not alot. Next I threw in more weight up to 113 and lowered the helix to 37/35. Ran again came out of hole about 8400 and climbed to 85-8600 but did not seem to be pulling as hard felt like it was slipping. Checked clutch and was hotter than 41/35 setup. From what I can tell the pb-80 on the winder needs a steep helix and less weight compared to a lower helix and more weight to eliminate low end belt slippage. I am going upnorth in 3 weeks can't wait to try it out against my hh setup. It seemed to shift out very smooth with good pull. Also very quiet compared to the yammie primary. I know some maybe will disagree about the heavier side pressure springs but I feel they are not needed on a stock tune. Thanks.

Your thinking is not really true about light weights not upshifting faster. What happens if you over weight any clutch setup and under rev it?
Big old bog is what you’ll get. Lighter weights just allow the engine to run in the power band. The upshift force will still be the same @ 8500 as 9000 rpm. The weights just dictate at what rpm that actually happens at.