centerforce I clutch question
Thread Starter
Melting Slicks
Joined: Mar 2002
Posts: 2,164
Likes: 7
From: Beringen
centerforce I clutch question
I brought my flywheel and clutch to a balance shop to have it balanced because I had a vibration issue that is clearly related to either engine or flywheel/pp.
I decided to do away with the weights on the clutch. How much power will it still hold with stock 255 tires ?
I decided to do away with the weights on the clutch. How much power will it still hold with stock 255 tires ?
Drifting
Joined: Dec 2009
Posts: 1,349
Likes: 34
From: Porterville Ca
The clutch will hold just fine without the weights. They are just there to add pressure at higher RPMs.
I seriously doubt the flywheel and clutch are the cause of a vibration. I would suspect :
1) Worn or broken motor or trans mount
2) Something rubbing the frame and transmitting engine vibrations to the car.
3) Wrong harmonic Balancer
4) Spun harmonic balancer
5) Misfire
6) Crossed plug wires
7) Running too lean or rich
When did the rough running start ? How long have you owned your car ? Feel free to PM me if you have any other questions or need anything clarified. Good luck.
I seriously doubt the flywheel and clutch are the cause of a vibration. I would suspect :
1) Worn or broken motor or trans mount
2) Something rubbing the frame and transmitting engine vibrations to the car.
3) Wrong harmonic Balancer
4) Spun harmonic balancer
5) Misfire
6) Crossed plug wires
7) Running too lean or rich
When did the rough running start ? How long have you owned your car ? Feel free to PM me if you have any other questions or need anything clarified. Good luck.
Thread Starter
Melting Slicks
Joined: Mar 2002
Posts: 2,164
Likes: 7
From: Beringen
New engine, fully balanced
(internal) Body off resto. New balancer, new flywheel.
Nothing rubs.
Vibration is also there when in neutral. Starting to get noticed from 3000 and up.
Engine mounts were reused as these seemed fine. Already tried moving the engine sideways by hand, nothing specially noted.
I'm getting the flywheel and cluctch rebalanced at the moment, but intend on removing the weights.
(internal) Body off resto. New balancer, new flywheel.
Nothing rubs.
Vibration is also there when in neutral. Starting to get noticed from 3000 and up.
Engine mounts were reused as these seemed fine. Already tried moving the engine sideways by hand, nothing specially noted.
I'm getting the flywheel and cluctch rebalanced at the moment, but intend on removing the weights.
Instructor
Joined: Jul 2010
Posts: 241
Likes: 1
From: Lancaster California
what kind of HB are you running? if its a fluid-damper or anything like that style that is self balancing then you will have a vibration because the weights on the clutch and the weights in the HB will constantly be fighting against one another. We had the same vibration on one of our cars with a centerforce. swapped to a different HB and vibration was gone. turns out it was just doing its job the whole time
Pro
Joined: Apr 2012
Posts: 517
Likes: 2
From: Orlando FL
I have a CF clutch in my car and I have heard of people taking those weights off because of a vibration (the weights get stuck). I haven't any issues yet. But if I ever get a vibration that will be be the 1st thing that I will look at. I have solid motor mounts so I will feel the Vibe. Good luck and keep us posted in your progress.
Safety Car
Joined: May 2004
Posts: 4,352
Likes: 1,581
From: los altos hills california
Does your pressure plate / flywheel combo have dowel pins or dowel pin holes? Recommended that you use them!
When I queried CF tech about the weights he said they add maybe 10% at RPM, so it would appear to be mostly marketing.
When I queried CF tech about the weights he said they add maybe 10% at RPM, so it would appear to be mostly marketing.
Thread Starter
Melting Slicks
Joined: Mar 2002
Posts: 2,164
Likes: 7
From: Beringen
ATI balancer.
I just brought my flywheel and pp to get balanced. The guy is going to put in dowels because the pp exhibits a small amount of movement when the bolts are loosened a little (shouldered bolts - arp items btw).
The guy doing the balance was of the opinion that the weight wouldn't throw off balance because they are self centering, but I don't trust them anymore.
I think that my tires will break loose before my clutch does, so it shouldn't be such a big deal.
I just brought my flywheel and pp to get balanced. The guy is going to put in dowels because the pp exhibits a small amount of movement when the bolts are loosened a little (shouldered bolts - arp items btw).
The guy doing the balance was of the opinion that the weight wouldn't throw off balance because they are self centering, but I don't trust them anymore.
I think that my tires will break loose before my clutch does, so it shouldn't be such a big deal.
Pro
Joined: May 2011
Posts: 722
Likes: 58
From: Karlsruhe (Germany)
You can have a look on the weights through the opening for the clutch fork.
Maybe you will need a mirror. If you can see them not centered: bingo.
And maybe you will be able to push them back into center through that opening with a tool.
Yes the weights are self centering - as longs as they don´t get stuck. And this happens sometime.
Maybe you will need a mirror. If you can see them not centered: bingo.
And maybe you will be able to push them back into center through that opening with a tool.
Yes the weights are self centering - as longs as they don´t get stuck. And this happens sometime.
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Instructor
Joined: Jul 2010
Posts: 241
Likes: 1
From: Lancaster California
yea we had a center force on our c3 as well as our jeep. both cars had a pretty noticeable vibration. we ended up finding that on both cars all the weights were off to one side. i think that if center force were to put a small tac or something to hold the weights in place this would fix the problem. the weights aren't there for balance so much as they are for added holding strength
but yea, we have had the two cars apart several times and every time all the weights were all off to one side
running a McLeod now and so far its been amazing
also smaller overall diameter so a smaller moment of inertia. makes the revving and engine deceleration a tad quicker
but yea, we have had the two cars apart several times and every time all the weights were all off to one side
running a McLeod now and so far its been amazing
also smaller overall diameter so a smaller moment of inertia. makes the revving and engine deceleration a tad quicker
Thread Starter
Melting Slicks
Joined: Mar 2002
Posts: 2,164
Likes: 7
From: Beringen
yea we had a center force on our c3 as well as our jeep. both cars had a pretty noticeable vibration. we ended up finding that on both cars all the weights were off to one side. i think that if center force were to put a small tac or something to hold the weights in place this would fix the problem. the weights aren't there for balance so much as they are for added holding strength
but yea, we have had the two cars apart several times and every time all the weights were all off to one side
running a McLeod now and so far its been amazing
also smaller overall diameter so a smaller moment of inertia. makes the revving and engine deceleration a tad quicker
but yea, we have had the two cars apart several times and every time all the weights were all off to one side
running a McLeod now and so far its been amazing
also smaller overall diameter so a smaller moment of inertia. makes the revving and engine deceleration a tad quicker
The Mcleod clutch holds more power I think but has more of a tendency to chatter. I have a powerful engine, but still street type 255 tires. I think the tires will break loose before the clutch will.