Turk/Tyler-Clutching Q

tbalz

tbalz

New member
Joined
May 12, 2003
Messages
52
Location
Upstate, NY
What do you think about a 51/43 or 54/42 in a 21T/38T Viper with 1.25" Ripsaw and a monoshock skid? I got access to just about every color secondary spring (thanks to Monker). I figure I will have to add a little weight to the tips as well to pull the revs down with the gearing change.
 
run the 54/42 with a green spring wound at 70*. Shoot for 8400-8500 all the way through.
 
whoops don't know if i was allowed to answer that or not, noticed it was specifically directed...
 
You won,t be able to put enuff weight in the arms to pull proper rpm,s with that gearing...your gonna overrev. You might want to try some 8dn-20 weights with that helix at 80 degree wrap with a red spring. 51/43 will raise rpm,s vs the stock 47 & you will need a lot more weight in the 8ek,s to offset that plus the lower gearing will raise rpm,s. 54/42 might be OK...depends on the cut of the helix.
 
Just remember the 51/43 is a stock yamaha helix (angles act as slightly less as what they are) and the 54/42 is an R helix from Dalton. R helixes have a short initial angle and transition to what is mostly a straight angle helix. There is also a Hauck 47/43 in my box. Get some starting points and we'll play this winter.
 
yamaholic22..not trying to exclude anyone on purpose ..the question was specific because i am not on the forum enough to know who you can trust for clutching...I know Turk and Tyler(SRXMAGIC) can be counted on for unbiased real world answers, so i wanted to make sure they answered my question.

Thanks guys...So much for being a simple change with parts on hand :)
 
Turk,
I am going from the stock .90" yokohama to the 1.25" ripsaw..I figured that would help bring the RPMs down a little. Is that a correct assumption?
 
the ripsaw won't bring your rpms down much if any on top end. You have to get more weight in the tips, but stock viper weights dont have enough adjustablity to allow you to get enough weight in the tips to bring the r's down with lower gearing AND a low finish angle on the helix, which is why he recommended using DN-20s. They have more tip weight and profile on the tip than the 8EK's, so they will act heavier on top end, making it much easier to get your revs down.
 
The R style cut helix,s from Dalton will act a lot steper then they are marked. They go straight from 1 angle to another with no transition. I tested the 52R46 in a 02 SRX & it worked great. Your gonna have to bolt everything in & see what happens. You got a lot of stuff going on in those clutches & need a baseline rpm to work with to dial you in.The .92 might make 1-200 rpm diff but it will give you a lot more top end. Those tracks fully clipped really help on the big end.
 
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