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post #1 of 6 (permalink) Old 06-11-2013, 06:49 AM Thread Starter
 
Join Date: May 2013
Posts: 134
Clutch weights (where to buy)

New to the forums and to Redline.....where can I buy parts for the clutch? I would like to pick up the parts to possibly add weight for a little lower engagement for low speed driving.

Is it a feasible thought to add a little weight for the lower initial engagement but also add a little bit of spring preload on the rear pully to then slow down the shifting? (kind of equalize the extra weight out)

At least then thet clutch would engage at a lower speed for low speed but not shift too fast as to over lug the motor.....just thinking out loud.

Anyone tried this?

Thanks for any info!
Jeff Harper
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post #2 of 6 (permalink) Old 06-11-2013, 01:18 PM
 
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Location: Oregon City OR
Posts: 378
Re: Clutch weights (where to buy)

Quote:
Originally Posted by Harper View Post
New to the forums and to Redline.....where can I buy parts for the clutch? I would like to pick up the parts to possibly add weight for a little lower engagement for low speed driving.

Is it a feasible thought to add a little weight for the lower initial engagement but also add a little bit of spring preload on the rear pully to then slow down the shifting? (kind of equalize the extra weight out)

At least then thet clutch would engage at a lower speed for low speed but not shift too fast as to over lug the motor.....just thinking out loud.

Anyone tried this?

Thanks for any info!
Jeff Harper
Welcome to mystery world of clutch tuning. There are several rules to tuning I recommend you follow. One is to only change one thing at a time.
Also before you start changing things you need to carefully record what your car is doing now in regard to exact engagement RPM, top end RPM and top speed. Also not exactly what weights, and springs you have in there now.
The primary is the place to start. The amount of weight here will affect your engagement RPM and also change your top end RPM. My Riot came with 37 g weights and engaged at close to 4000 and the top end was over 8200. If you go with stock weights I would recommend 39 g. This would put your engagement at about 3000 to 3200 and your top end at near 8000. In my opinion much better numbers.... I would not change the secondary at all unless the car will not downshift when climbing hills. Just my opinion. Now if you want to be much more able to tune the clutch, I recommend you invest in some Thundershifter adjustable weights. You can then and weight to the heel, for low end, middle hole for mid rpm and the end to control top end. This lets you customize your shifting parameters to your particular HP, weight of car and driving style. If you want more specific info about this, PM me and we can get into in in more detail.

Later,
Scott
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post #3 of 6 (permalink) Old 06-12-2013, 03:27 AM Thread Starter
 
Join Date: May 2013
Posts: 134
Re: Clutch weights (where to buy)

Thanks for the information Scott, I appreciate it! Once I pick up the car (this saturday) I will go through it and see just how it is currently setup and such. I know when I went for a ride in it a few weeks ago at Little Sahara (in oklahoma) it ran great and I did see that the clutch engaged at about 4000 rpm and the motor did see 8000 rpms when he really laid into it. We never really got topped out and I dought I will get topped out very often either. It has some fairly aggressive paddles on it (I think) because they hooked up very good without alot of slip. He said he had some others on it and then went to these for better hookup so I will need to look at that as well. I would imagine you could easily (over tire) a stock motor but it seamed to be ok. I just have to start figuring out sources for parts and such as far as clutch and motor parts so any of that information would be greatly appreciated. Thanks!!
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post #4 of 6 (permalink) Old 07-03-2013, 03:50 AM Thread Starter
 
Join Date: May 2013
Posts: 134
Re: Clutch weights (where to buy)

I bought clutch parts from Wahl Brothers racing and these guys seam to be a class act and shared information and ideas and were very helpfull.

I had a silver/black spring 85-205 with 4 37 gram fly weights....the thing would engage at 4000+ rpm and rev to over 8000 all the time and never put any power to the ground at all.

I went with a polaris spring that is 70-210....this means the initial weigh is lower (for a lower stall) but the end weight is higher so that it still doesnt "over shift".

I have the polaris spring in it with two 39 gram and two 42.5 gram fly weights in right now and it stalls at 3000rpm and feels SOOO much better on putting some power to the ground! Very happy with the results so far. I have another set of 42.5 fly weights coming to test a little more weight just to see how it reacts. I am using this setup for dirt with dirt tires....setup will change when I put the paddles on and head to the sand I am sure.
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post #5 of 6 (permalink) Old 07-31-2013, 07:02 AM Thread Starter
 
Join Date: May 2013
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Re: Clutch weights (where to buy)

I still have the brown polaris spring in and now have 4ea. 42.5g fly weights in and I really like how it drove and put power to the ground. Still had no issues climbing or anything.

Over the winter, I will pick up a set of Thunder Products adjustable clutch weights so I can further tune.
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post #6 of 6 (permalink) Old 08-13-2013, 11:35 PM
 
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Re: Clutch weights (where to buy)

really like looking at and I conceive this website got some genuinely useful stuff on it! .
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