I have noticed
lots of coil binding in my primary with original spring chewing in strider side

 

I have noticed
lots of coil binding in my primary with original spring chewing in strider side

I’ve also noticed a lot of binding/rubbing with the stock almond/gold spring. Had the cover off while I was throwing 10-74’s in and it was rubbing the spider pretty good. (Also wearing into the cover and cup in the spider).
still turning 8200 in all conditions with 74g. Might try 76’s if we get more snow..

Have a Venom 140/220 on the bench waiting to go in also

 

Slp blue/silver 140/300 primary spring with one Delrin washer.
venom black/green in the secondary with roller bearing. Running 10-74s for now. Pulls hard.

 

Slp blue/silver 140/300 primary spring with one Delrin washer.
venom black/green in the secondary with roller bearing. Running 10-74s for now. Pulls hard.

I have a new Polaris blue spring (120-300), would that be close to the SLP spring? I know it would be lower engagement, but has same spring rate as the stock almond/gold. Was going to use it along with the Venom blk/gr secondary and 10-74 weights.

 

It seems the venom black/green is a popular choice for the secondary. Is there a similar venom spring that is good for the primary?

 

As others mentioned, a Venom (140-220) black/green secondary spring with roller bearing shim, or a Speedwerx (155/222) red secondary spring.

EPI 74g belly buster weights (0-3000ft) with a Speedwerx (122-285) green/yellow or (148-290) green/white primary spring with a delrin washer against the clutch spider. The Venom (120-310) white primary spring is a good option as well but you may need to run slightly heavier weights.

 

As others mentioned, a Venom (140-220) black/green secondary spring with roller bearing shim, or a Speedwerx (155/222) red secondary spring.

EPI 74g belly buster weights (0-3000ft) with a Speedwerx (122-285) green/yellow or (148-290) green/white primary spring with a delrin washer against the clutch spider. The Venom (120-310) white primary spring is a good option as well but you may need to run slightly heavier weights.

Is there a difference between speedwerx 155 222 and teams 155 222. Difference in length.

 

Oem on right. black 155/222. 600 miles with 2 derlins and .120 float. Its garbage. She's a binder..and not from too much cheese.

 

11-74s 👍🏻

 

considered trying these as well. Do they truely act like a heavier weight? (In comparison to 10’s). That seamed to be the consensus so maybe try those before going 10-76

 

Yes
I have a used set of epi s with 300 miles
I sold my sled and they won’t work in my boost

 

Ran them with different helix
Black green secondary
Stock primary spring
7850 climb to 8100

 

So looks like everyone is using the venom blk/grn secondary. What about the primary?

 

This works with 10 series
With 11series stock worked

 

I think you’ll want 76 in 10s
But depends on helix springs ect

 

Going to run stock helix with Venom spring and one delrin washer.

 

I also have a sled with Patrick custim carbon👍🏻

 

11 series

 

I'm gonna try em too.

 

Been following this thread for a bit. I don't have a Matrix but have a 19 Assault 850. I assume this would still apply to that sled?
Couple questions:
What is the 850 ideal rpm on top?
Do the derlin washers effect rpm and buy how much?

I ran mine wide open on a hard packed lake last weekend and was disappointed in top end speed. Only saw 100-102 and was pulling 8050 give or take. I do have a studded 1.6 so obviously not a top end track. I just figured I'd see 108-110 with this 850. A 1200 doo was right there with me. Hell my old Suzuki's 800's would walk this 850. Just had it at dealer and they said compression was 140lbs a side which apparently is at the top of the range. Sled pulls hard but was expecting more.

Not sure if clutching will help or limited by track and gearing. I do have a new 1" sitting here I may swap over summer.

Thoughts??

Sent from my SM-G960W using Tapatalk

 

I dont think you are going to see a lot of speed out of an assault chassis at full ride height.

 

102 out of the gearing for a 2" track SBA is pretty good. Acceleration from 0-100 is crazy with those sleds. They are no joke. I'm just going by what I've seen of them, I was out with a guy on a 19 SBA all day today. His is a 144 with 1.75" track and I can't touch him to 80mph unless I get perfect traction. I pull by at that point, but mine is geared for it. Just my opinion, but if you want more top speed, you will need the right track and gears.

The delrin washers in the secondary let the spring turn without binding in the spring cup, or having the cup bind against the moveable sheave half. The inner sheave twists relative to the outer, and if the spring binds it causes less than ideal backshift and may not shift out all the way for top speed. A bearing under the spring cup is better apparently, and I have one coming to try it out.

 

The set up you are running works well. I ran very close to that set up last season on one of my sleds. It worked well all around.

 

I like it. Doesn't seem to be a down side that I can see.

 

Maybe nit 1.3 to 1. But 1.6 to 1.25/1.3 with gearing is good for a notable jump. Years ago we did a radar on a tcat and it lost 7mph going up from 1 to 1.25.

 

Here is the whole part number: WWG35TY03

 

I don't run any washers just the bearing. Have had a bearing in at least 10 sleds and no excessive wear on the aluminum sheave.

 

I know that you and a lot of others do.. I was just curious how much poundage it added instead of the washers

 

1.6 track is a 1.86 ratio is 95 mph @ 8250 1.1 ratio. with over drive 102-103 is all it will have. now you can go 1.81 ratio tops. it will struggle just a bit in deep snow. it's good for 3 miles per hour more. so if you turn lower rpm's then it will be slower then that. he's the issue with the 850. the peak h.p. is 8150 rpm. peak torque 8000. you want it clutched closer to 8000 then as pipe heat builds it will climb up a bit. now the 800 likes 8350 as the sweet spot. more rpm = more speed. if you have the power to pull it? now if i was running hard packed or ice all the time you can gear that 1.6 even higher. even 1.74 ratio. 102 @ 8250 add 9-10% over drive and 112 mph can be had. but it will really build clutch heat and any amount of snow. if you want to go fast the 1.6 is not the track for that. 1" track geared high will get you into the 110-115 mph gps radar etc.

 

Yep my 20 assault wound out was 108 speedo with 1.6 cobra at 8100. So probably right at 102 actual speed.

 

Black/ green seems to be the spring to run with the stock helix.
What’s the preferred spring for a full progressive, like a 48-42?
I know it’s been discussed that the stock 155-222 Black (or venom Black/red) is
not any good because of binding when adding the bearing.

 

Stock springs in primary and secondary. After adding bearing and two washers rpms dropped a couple hundred. Does this sound right?

 

No issues without the washer. The bearing doesn't spin at all. It rotates back and forth a quarter of a turn when the moveable sheave is shifting on and out. Lightly grease the rollers and run it.

 

You have me sold. There is alot of spring pressure on the bearing, but the aluminum must be hard enough to handle the pressure spread out over that many rollers. I will try it.
I think I'm going to set up one clutch totally stock (plus bearing), and the other with a helix that will work with the black/green spring.

 

I have 300 miles with the bearing no washers. Checked and everything is fine. With the subtle changes in clutching sled shifts way smooth and consistent. It’s a keeper.