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Discussion Starter #141
View attachment 251897

I called venom and they said the polaris 7.25" is the same as the wildcat xx for springs. So I ordered 2 springs 43-175 and 55-225. I have straight-line adjustable weights. 67g-80g weights with 3-1-0. The 43 spring i can't use as its so light that it is really hard to shift because the belt is already starting to grab at idle. I never took the weight out to test it further. But I swapped in the 55 and that seems to be a good starting point. Very slight belt grab at idle so engagement is immediately. Only catch is the rpm in mid range is 7000 but for me thats fine. I don't need high end nor really care to listen to this thing winding itself tight WFO. All the trails I do are 2-45mph so I need slow performance.
But if you have the lighter weights it would probably be pretty close for all around trails.
I will have the 55-225 next week. I'll let you know what the actual rate is compared to some of the others

You are running a lot of weight so I'm curious about how heavy this spring actually is.
I recently put one of my lightest springs in with 3-3-0-0 in my BDxtreme 55-71 weights just to see how slow I could go. It was pretty awesome for strictly rock crawling but of course I couldn't get any RPM on the top end
 

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The guy at venom said the wildcat was 95 starting on the polaris chart. Dont remember what the high number was.

The weird thing is there is like no spring preload. You put the cover on and you barely have 1/8" or less that you have until it touches the tower. And you can one finger hold it tight
 

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Just wanted to share what the Alba kit comes with. I've had this on the shelf for almost a year, honestly the clutch scares me so I never even opened the box till this weekend. I don't want to be in this thing all the time adjusting for each type of riding I do.
I'm planning to changing a few things based on this threads info. I really like sound of what CRAWLR came up with, except for more dunes he rides the same areas as I do desert and small rock trails. (Dove springs and Ridgecrest/CalCity area in general, Havasu, Parker, Dumont, Calico, Johnson Valley)

Alba kit includes;
STM Supertip cam arms #4001151
STM helix 38-45 #4001102
Venum 180-320 purple spring #210492-018
Alba 200/280 green spring #210493-011
Alba bushings
251904

251905

251906

251907

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251910

251911

251912
 

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Discussion Starter #144
Just wanted to share what the Alba kit comes with. I've had this on the shelf for almost a year, honestly the clutch scares me so I never even opened the box till this weekend. I don't want to be in this thing all the time adjusting for each type of riding I do.
I'm planning to changing a few things based on this threads info. I really like sound of what CRAWLR came up with, except for more dunes he rides the same areas as I do desert and small rock trails. (Dove springs and Ridgecrest/CalCity area in general, Havasu, Parker, Dumont, Calico, Johnson Valley)

Alba kit includes;
STM Supertip cam arms #4001151
STM helix 38-45 #4001102
Venum 180-320 purple spring #210492-018
Alba 200/280 green spring #210493-011
Alba bushings
From the looks of it, and from my limited experience with this stuff, the Alba kit looks fast, fast, fast.
Holeshot, wide open throttle, don't slow down.
Definitely not what I would want.
 

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Discussion Starter #145
I will have the 55-225 next week. I'll let you know what the actual rate is compared to some of the others

You are running a lot of weight so I'm curious about how heavy this spring actually is.
I recently put one of my lightest springs in with 3-3-0-0 in my BDxtreme 55-71 weights just to see how slow I could go. It was pretty awesome for strictly rock crawling but of course I couldn't get any RPM on the top end
So I got the Venom 55-225 spring, and I should have paid more attention. I already tried that spring. Now I have 2 of them that I don't want. Dammit
 

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So I got the Venom 55-225 spring, and I should have paid more attention. I already tried that spring. Now I have 2 of them that I don't want. Dammit
Lol! i'm still riding the 35-195 spring (AC part no 0646-467). Haven't riden since changing out the weights as I'm on a 47 gram weight down from 52.
 

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It would be interesting to see the clutch face with that low of spring pressure and light weights. Any idea what your belt temp reads? I run a 105/280 Dalton primary with 65g STM weights but I have 3R tune. I still chalk the face slightly on high speed trail runs for super long distance of WOT. This is a pure trail setup zero rock crawling. I will say the STM weight has a nice profile vs some of the other weights out on the market as I have tried them all.

By the looks of it that Alba kit is the best deal on the market as I have just about all the same parts and I have bought them all separate to get where I am at. I would highly recommend the Alba kit by looking at its components for trail or dune it might not be the best rock setup.
 

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It would be interesting to see the clutch face with that low of spring pressure and light weights. Any idea what your belt temp reads? I run a 105/280 Dalton primary with 65g STM weights but I have 3R tune. I still chalk the face slightly on high speed trail runs for super long distance of WOT. This is a pure trail setup zero rock crawling. I will say the STM weight has a nice profile vs some of the other weights out on the market as I have tried them all.

By the looks of it that Alba kit is the best deal on the market as I have just about all the same parts and I have bought them all separate to get where I am at. I would highly recommend the Alba kit by looking at its components for trail or dune it might not be the best rock setup.
no belt temp gauge but haven't had issues with the 52g weights. my lowest elevation is 4500ft (Moab) and typically ride all summer in Colorado between 8-13K. In Colorado even with a 35-45 helix 200-280 secondary and 35-195 spring WOT only nets 8300-8700 RPM. some trail riding, lots of rock crawling, and moab...seeing 45mph+ on the dash is rare but would be nice to get into the powerband for when i stick the throttle on short straights. Hoping the 47g weight will be in-between, not perfect in either 4500 or 13K but better than 52g which is too much even in Moab.
 

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It would be interesting to see the clutch face with that low of spring pressure and light weights. Any idea what your belt temp reads? I run a 105/280 Dalton primary with 65g STM weights but I have 3R tune. I still chalk the face slightly on high speed trail runs for super long distance of WOT. This is a pure trail setup zero rock crawling. I will say the STM weight has a nice profile vs some of the other weights out on the market as I have tried them all.

By the looks of it that Alba kit is the best deal on the market as I have just about all the same parts and I have bought them all separate to get where I am at. I would highly recommend the Alba kit by looking at its components for trail or dune it might not be the best rock setup.
with that much weight what do you see at WOT out of the start?
 

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It would be interesting to see the clutch face with that low of spring pressure and light weights. Any idea what your belt temp reads? I run a 105/280 Dalton primary with 65g STM weights but I have 3R tune. I still chalk the face slightly on high speed trail runs for super long distance of WOT. This is a pure trail setup zero rock crawling. I will say the STM weight has a nice profile vs some of the other weights out on the market as I have tried them all.

By the looks of it that Alba kit is the best deal on the market as I have just about all the same parts and I have bought them all separate to get where I am at. I would highly recommend the Alba kit by looking at its components for trail or dune it might not be the best rock setup.
Initial engagement at 2400, jerky, good engagement at 2700. WOT in H 9300-9400 at 6K ft. will be a little high in RPM likely in Moab but we shall see. revs quick.
 

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I finally put a couple miles in the 55-255. With 2-0-0 in straightline heavy weights. I dont care for it. I'm not sure if something isn't right or if its just the way the spring is but it dont back shift when climbing a hill unless you burp the throttle. Start at 7000 rpm climbing bogging down to 4000 until I burped the gas and then it shifted back up to 7000. Initial starting seems slippy/weak engagement. Had to start on a incline and the wife was wussy footing it and dang near smoked the belt trying to get it moving.


I'm thinking about going back to stock spring and just filling the weight 3-2-0 and see what happens.
 

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no belt temp gauge but haven't had issues with the 52g weights. my lowest elevation is 4500ft (Moab) and typically ride all summer in Colorado between 8-13K. In Colorado even with a 35-45 helix 200-280 secondary and 35-195 spring WOT only nets 8300-8700 RPM. some trail riding, lots of rock crawling, and moab...seeing 45mph+ on the dash is rare but would be nice to get into the powerband for when i stick the throttle on short straights. Hoping the 47g weight will be in-between, not perfect in either 4500 or 13K but better than 52g which is too much even in Moab.

Mine pulls 8400 on the hit and slow pulls to 8800 / 8900 on a long straight pull on trail. Surface will move that rpm around between sand and hard seasonal road. Fast backshift with minimal engine brake.
 

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CRAWLR what was this setup you tested/used, I tried to figure it out from all the posts but want to be sure?
Helix BD-Extreme 35-45 with EBS
Primary Spring 35-195 AC #0646-467
Secondary Spring ?
Arms/Weight heal/center/tip ? (obviously my STM arms would be different)

I went to Bald Mtn to test the new helix. AWESOME!
I asked BD-Xtreme to give me 'mild' engine braking and they got it perfect.

I was at about 7800' so the power was down a little. I set up the clutch for around 3000' so I expected that. Like I said in the beginning, I wanted the best of both worlds. I'm not trying to win drag races. For me, ideal is 3mph without slipping the belt when I am in the mountains and over 9000rpm wide open in the desert with some engine braking and decent mid throttle torque without being jumpy and jerky.

I honestly didn't think I could get it as good as it is right now.
9100rpm in the desert with good throttle response and engine braking at 5000rpm.
2500rpm engagement with solid belt grab at 3000rpm.
I can crawl at 3-4mph UP and DOWN rocks by feathering the throttle between 3000 and 4000.
8500rpm wide open at 7800' which is plenty of power in that environment.
 

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Discussion Starter #154
CRAWLR what was this setup you tested/used, I tried to figure it out from all the posts but want to be sure?
Helix BD-Extreme 35-45 with EBS
Primary Spring 35-195 AC #0646-467
Secondary Spring ?
Arms/Weight heal/center/tip ? (obviously my STM arms would be different)
Helix - BD-Extreme 35-45 with EBS
Primary Spring - 35-195 AC #0646-467
Secondary spring - Venom Green/Black (210493-011) 200-280
Weights - BD-Xtreme 55-77 (13-B5571)
BDX weights have 4 holes with magnets. I had 2-0-0-0

I have the AC 35-215 primary spring in it right now with 3-3-0-0 to try tomorrow in Havasu. Probably too much weight but it's what was in there from a previous test and I was too lazy to change it.
I'll let you know how that spring works tomorrow night
 

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Also curious. Can you post elevation, tire size, tune, and other weight in the vehicle for reference? I’m surprised you can go that heavy in weights and pull 9k or better. I have alba tune and 32s and at 6k ft need 48g or less to pull over 9k wot
 

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Discussion Starter #156 (Edited)
Just for reference, here's my notes from a lot of the stuff I have tried...
I've measured the rate on most of my primary springs at 2.5"/1.5" as a baseline. These measurements are pretty close to the measurements I got from my clutch. Most of them are rated at different heights so I wanted to compare apples to apples.

Primary Spring ............................ Rated / Measured at 2.5"/1.5"

Venom red/gold/black (810003) ......... 55-225 / 22 - 176
Venom red/silver/orange (810006) ..... 76-157 / 52 - 154
Venom black/red/white (210250-001) .. 92-190 / 70 - 158
Speedwerx blue stripe (CCH5-H-) ..... 80-190 / 72 - 154
AC (0646-467) ..................................... 35-195 / 60 - 220
AC (0646-439) .................................... 50-250
AC (0646-468) .................................... 35-215 / 78 - 266
AC ....................................................... 60-220 / 92 - 260
AC ....................................................... 85-225
AC ....................................................... 85-235 / 106 - 250
AC ....................................................... 85-255 / 120 - 295
Speed SSI ........................................ 120-280 / 130 - 295
Dalton White/Violet ............................. 95-255 / 124 -
AC Stock spring ................................. 96-225 / 72 - 146



Secondary Spring

Venom Green/Black (210493-011) 200-280


Weights

BD-Xtreme 55-77 (13-B5571)
BD-Xtreme 64-86 (13-B64-86)



Helix

Venom 36-45 non-EBS (542002)
BD-Xtreme 36-45 EBS
 

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DynoJet has a clutch kit now available too, no info on helix cut or spring weight but in the downloads is an installation manual for reference.
251988
 

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I would like to try those weights..... They look like you can really load the heel for great belt grab down low. I would like to see the profile vs the STM to see how flat they are. Thanks for posting I will try and find these.
 

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well more tuning to go for me. in moab running the config i posted earlier it hit perfect on WOT (9300-9400) in H but the RPMs climbed to 9850 pretty quick after that as it built speed and topped out around 60 mph with 3/4 pedal, any more and it would just rev to the rpm limiter.
 
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