entropy
Moderator
Posts: 8671
|
posted February 28, 2004 11:48 PM
MTC 2stage: still leaving soft ...
Yesterday I got a new personal best  , but I left my 1st 8.7 pass at the 60' line 
I am using MTC with 6 OEM springs and 3 x .050 shims on ea spring, but it is still leaving soft. This is only my 2nd time to the track with the MTC. I guess next time I will try putting 3 Muzzy springs in???? any suggestions???
R/T_____0.080
60'_____1.529
330'____3.848
1/8_____5.753
1/8 mph_128.91
1000'___7.424
1/4_____8.842
1/4 mph_157.41
Last Aug, (before the MTC) I was running Muzzy clutch w/6 muzzy springs:
R/T_____0.001
60'_____1.463
330'____3.808
1/8_____5.758
1/8 mph_125.92
1000'___7.458
1/4_____8.930
1/4 mph_147.18 (ET race, came off the gas hard near finish)
____________
This moderator uses moderation in moderation
  
|
Lorcan
Expert Class
Posts: 327
|
posted February 29, 2004 04:44 AM
If you feel it's soft in the first few feet, then it needs more spring pressure. If it's soft from then on, you need more weight on the arms.
Also, are you just dropping the clutch lever or sliding it like you used to?
____________
810cc - 211mph: www.750turbo.com
|
entropy
Moderator
Posts: 8671
|
posted February 29, 2004 05:06 AM
lorcan,
i am dropping the clutch hard off the line, so more spring pressure what i will try next!
____________
This moderator uses moderation in moderation
|
CrotchRocket
Moderator
Bracket Racing with Betsy
Posts: 8038
|
posted February 29, 2004 05:22 AM
entropy, what OEM springs are you useing???
____________
Jason Miller StreetBike Seminars
*****DragRacers do it better, because they dont cut Corners*****
|
entropy
Moderator
Posts: 8671
|
posted February 29, 2004 06:30 AM
CR,
I think I am using my ole stockers, but they may??? have come with the lockup, i can't remember. Having old-timers disease is a terrible thing
I know they are softer than my Muzzy springs and even look "thinner".
____________
This moderator uses moderation in moderation
|
cowboy
Pro
Posts: 1061
|
posted February 29, 2004 08:09 AM
I'd go with the 3 muzzy springs and take the shims off the stockers.You need a spring tension guage.
|
entropy
Moderator
Posts: 8671
|
posted February 29, 2004 08:55 AM
quote:
I'd go with the 3 muzzy springs and take the shims off the stockers.You need a spring tension guage.
CB, that's the plan. and yes i do need a spring tension guage, although it would seem pretty easy to make??
____________
This moderator uses moderation in moderation
|
CrotchRocket
Moderator
Bracket Racing with Betsy
Posts: 8038
|
posted February 29, 2004 12:53 PM
 Edited By: CrotchRocket on 29 Feb 2004 12:55
entropy, try the OEM 1087 springs, they are a little stiffer...If thats still not enough, try the OEM 1881 springs...Hope that helps...
____________
Jason Miller StreetBike Seminars
*****DragRacers do it better, because they dont cut Corners*****
|
entropy
Moderator
Posts: 8671
|
posted February 29, 2004 04:20 PM
CR,
good tip on the progressively stiffer OEM springs. I didn't know they existed. Since I have the Muzzys, i'll try them 1st, but if I get uneven wear on the steels with 3 hard and 3 soft i'll get after the OEMs.
Thx
____________
This moderator uses moderation in moderation
|
wannabe
Pro
Posts: 1931
|
posted March 01, 2004 08:00 PM
I agree with Cowboy, you need a spring tester. I was thinking about getting this one. It's the least expensive and most portable one that I've found so far. You just sandwich this thing in a vice with your spring.
Anyone here have any other opinions on which spring tester to get?
|
entropy
Moderator
Posts: 8671
|
posted March 02, 2004 12:33 AM
wannabe,
that's a pretty coll lil tool. got a line on who sells em???
____________
This moderator uses moderation in moderation
|
Lorcan
Expert Class
Posts: 327
|
posted March 02, 2004 12:43 AM
I want one!
____________
810cc - 211mph: www.750turbo.com
|
Lorcan
Expert Class
Posts: 327
|
posted March 02, 2004 12:54 AM
Edited By: Lorcan on 2 Mar 2004 00:55
Not a very good picture but this is our hydraulic conversion for the Muzzy lockup. It's fitted and working. No more broken pullers!
____________
810cc - 211mph: www.750turbo.com
|
entropy
Moderator
Posts: 8671
|
posted March 02, 2004 01:11 AM
link to schnitz who sells the Tavia spring tester shown above
http://secure.cartsvr.net/catalogs/catalog.asp?prodid=325751&showprevnext=1
____________
This moderator uses moderation in moderation
|
entropy
Moderator
Posts: 8671
|
posted March 02, 2004 03:10 AM
lorcan
you guys made that yr self???
____________
This moderator uses moderation in moderation
|
entropy
Moderator
Posts: 8671
|
posted March 02, 2004 03:22 AM
Yep, Schnitz comes thru (again)
Tavia - Spring Test - Test Spring For Spring Testers $16.01
Tavia - Tester 100 PSI Clutch & Valve Spring $74.95
Tavia - Flange Drill Press -- for spring testers $8.95
____________
This moderator uses moderation in moderation
|
Lorcan
Expert Class
Posts: 327
|
posted March 02, 2004 05:33 AM
quote:
lorcan
you guys made that yr self???
Yes. Don't want to make another one either...
____________
810cc - 211mph: www.750turbo.com
|
entropy
Moderator
Posts: 8671
|
posted March 02, 2004 05:48 AM
hahahahahahaha, had too much fun making the 1st one eh??
I am happy with my MTC/cable clutch, but will be even happier when my 60's are back in the 40's.
____________
This moderator uses moderation in moderation
|
wannabe
Pro
Posts: 1931
|
posted March 02, 2004 08:41 AM
quote:
wannabe,
that's a pretty coll lil tool. got a line on who sells em???
I actually found the above tool at summitracing.com
|
entropy
Moderator
Posts: 8671
|
posted March 02, 2004 11:20 AM
quote:
quote:
wannabe,
that's a pretty coll lil tool. got a line on who sells em???
I actually found the above tool at summitracing.com
are you using it??? any numbers on OEM vs Muzzy, etc?
____________
This moderator uses moderation in moderation
|
wannabe
Pro
Posts: 1931
|
posted March 02, 2004 11:25 AM
Edited By: wannabe on 2 Mar 2004 11:26
quote:
I agree with Cowboy, you need a spring tester. I was thinking about getting this one. It's the least expensive and most portable one that I've found so far. You just sandwich this thing in a vice with your spring.
Anyone here have any other opinions on which spring tester to get?
|
cowboy
Pro
Posts: 1061
|
posted March 02, 2004 10:13 PM
That is the best one for this application.imo
|
AnotherRedHead
Expert Class
Posts: 348
|
posted March 03, 2004 12:01 PM
Karl, is the bike revving high when you leave or bogging? What rpm do you launch at?
Spring tester wont get you anywhere but numbers. You need to track test. We have pulled the clutch apart at the track 20+ times in one outing messing with spring pressures. It takes practice and perseverance. Let me know what its doing, I can probably help you Karl.
Nick
469 767 7978
|
kcadby
Pro
Posts: 1733
|
posted March 04, 2004 10:49 AM
THAT tester (in the picture) goes WAY TOO HIGH to do any good for clutch springs...
Didn't look at the Schnitz tester but I'm sure it's range is lower???
Karl...if the bike is reving but isn't trying to lift the wheel by 30-40 feet out then you probably need more 2nd-stage (less spring/or/more weight)...
If it only seems "slow" for the 1st 30-feet then you do need more primary spring...
ARH is right...you need to try several diff. combos...
What REEELY sucks is...all it takes is changing track conditions for you to have to "re-tune" your clutch FOR THE TRACK 
By the way...1.4-anything is KILLER 60FT for a TFA rider!!! IMO... 
|
wannabe
Pro
Posts: 1931
|
posted March 04, 2004 12:58 PM
Kev, thanks for the confirmation. I just threw up the pic. I think the right one is 100 psi max. Right?
ARH is definitely right about the clutch setup. What works for you one day may not work the next depending on the track conditions. You need a gazillion passes and a good log book to get good a handle on it.
The funniest thing is that if you ask the pro stock bike guys about their clutch setup, they will either straight lie to you or tell you to ask someone else. One of the reasons that Vance and Hynes supported Craig Treble so much in the beginning was that Craig was the man when it came to clutch setup. He had literally hundreds of pages of clutch setup logs for various tracks and conditions. V & H noticed that he was 60-footing a lot better than they were even though he had pretty much the same bike and motor. So, they ended up making a deal...V&H motors for Craig's clutch setup knowledge.
Everytime I think I have a clue, I find out that I haven't even hit the tip of the iceberg.
|
|
|
HOME
NEW TOPIC