Specific pro clutching question for 0-4000 ft

[Sheetmetalfab]

Been chasing overev in my 11 155 pro currently trying a team tied with 66-62 or 66-60 combo helix. Black/purple sec. Blue pink primary. Mtx 68s with 2 in the heel and three in the tip. Started on 1 in the heel and two in the tip hit overev bog instantly. Even with the two and three i still get bogs mid climb and peak rpm when stable is 8050. The 66-60 side of the helix hit overev much sooner than the 66-62.
Today i tried the secondary setup off my 10 d8 163 its a 60-40 helix with black purple spring tss 04. Almost the same overev and bog just pulled better off engagement with the more aggressive start.
So im wondering what my next step should be.
Could the black purple be too stiff for the lazy 66 start angle, maybe try the black black?
The tied clutch has quite a few miles on it. Could a chipped roller exaggerate a wandering rpm issue?
The sled pulls good rpm goes high then bogs, blip the throttle recovers 7950 then 8050 then wavers about there.

 

[AKSNOWRIDER]

my guess is you are hitting the limiter even in the midrange..seems like the cfi motors like the major rivit in the belly and a lighter 1 in the tip..so with that said..either swap rivit positions or bring the belly up to match the tip....I run from sealevel up to 6000ft with the ocasional up to 8000..I run the mtx 68's with 2 in the belly and 1 in the tip with blue/pink and stock secondary, on a bone stock 163 up to about 3000 ft(runs 8250 down low and 8050 at 3000, then I change over to stock primary spring with 64 belly busters and ride that from 3000-6000 ft...(it will hit the rev limiter easily if I am not real careful until I get over about 4200 ft...) this setup runs 8500+ at 3000 and 8150 at 6000.....also, dont rely on the guage for rpm..use the memory, guage has a hard time reading fast enough but the memory catches the over revs much better....

 

[Sheetmetalfab]

Thanks

Ill try more in the heel. It did seem the overev might be midrange. I just ended up with low top rpm so i figured i was too heavy in the primary to backshift well. It felt lazy on the takeoff. This was with the tied.
Maybe i just need to put a spacer under the throttle flipper down low.
i actually went up to 6500 ft yesterday and it pulled like 7950 w the tss 04 setup.
It seems my dragon wasnt so sensitive to elevation change. I had it along with the tied setup bolted in and my brother riding it. The dragon spanked the pro while pulling 7850 rpm.
If i wasnt so concerned about the dragon needing the fix or a rebuild soon as its at 600 miles. I might just sell the pro. The dragon is set up with one in the heel and two in the tip. Its been that way since 100 miles seemed to work best always pulled good rpm from 0 to 6000 ft with the tss 04 setup.

 

[AKSNOWRIDER]

I rode mine today all the way up over 5000ft..running the same setup I qouted above..held 7900 up that high pretty good I thought..pulls hard too..If you have a bunch of initial angle in the helix, you might try slp green/pink..it has same finish angle as the blue/pink but more initial pressure..helps get the bottom end snap back...when I ran my dragon setup in the pro..it worked good..but ran quite a bit hotter then it did in the dragon, and hotter then the setup I qouted above...the set up above has made me happy enough I havent messed with the clutching since(And normally I am always trying to make it better).........

 

[hiwayman]

At that elevation you need more helix in the tied. You need to run about 14 degrees more helix angle than you do with the tss 04.

 

[Sheetmetalfab]

What helix is stock in these?

I bought this sled with this helix and secondary in it so i dont even have stock to compare to. This setup i have is with help from chad with a2d sledworks. He runs a 61 degree finish angle with the tied sec. His sled has a pa head tho. Im gonna try 3 grams in the heel and tip with the tied tommorow see what happens. There has been a rash of broken green pink springs lately 5 that i know of thats why im running the blue pink. one was mine. Maybe try to load the sled more with a black black sec spring since i have one

 

[die hard poo]

0-3000ft this is what I am running:
With a TSS-04
Primary-10-66 with stock 140-330 spring
Sec: 60-42-.36 helix with black/purple spring

With tied
Primary-mtx 68g with 2 gram in heel, one gram in tip stock spring
Sec-71-62-.36 with stock black spring
I pull 8000-8200 rpms with no over tach

 

[hostile1]

Chad has a pa head, dynoport exhaust, and I'm sure something else! So he has a little more hp than stock.

 

[Sheetmetalfab]

Awesome feedback

Yeah i know chads is set up i was just going with what he recomended. Since he set me up with the dragon so well. Ill have to take some tools along and go test in hatchers running back to the truck a few times. Glad i have tommorow off, get er dialed for next weekend

 

[IQRIDR]

Larry-

Like I was saying about that 66 degree start angle in the Tied- It's like having a 47 degree start on a TSS-04. You need to bring that angle up closer to 73-75 and you will not hit the overrev so easy down low, plus it will make loads more power in the low and mid. Your finish angles close enough to choose from, the 61 works best on my sled and a few others I have set up though. Like mike was saying load the heel and leave the tip lighter as well. Ride it and give me a call with some feedback and we'll get it tight and right.

 

[Sheetmetalfab]

Guess ill have to break down and buy a helix

Was trying to go cheaper and use the helix i have. Guess ill get one coming i just looked at my first post and realized i was dislexic on the gram location its three in the heel two in the tip

 

[Sheetmetalfab]

Results

Well i put a 76 61 helix in it and it pulled way harder but still overev and bog with three grams in the tip and heel.
Pryed open the primary and found two bad rollers.
Swapped the clutch from my dragon on there and three grams heel two grams in the tip.
Now she rips. Had to tighten the rear track shock spring a half inch to try and keep the front end down.
had it up to 5000 feet today and runs great. Rpms pulled down to about 7900 on the highest 3.5 ft plus deep climbs. But mostly around 8050 to 8100 its at 8200 at home still will overev on the road but not under load.

Oh i also put a pa 12.5-1 head on it
Much permagrin