I am just wondering if they make something like this that will help take the shock off the trans during shifting ... I am using a act extreme pressure plate and 4 puck sprung and when I'm racing just seems like there's alot of shock during shifts

I don't know if they made something that would go inline with the clutch line so fluid can travel fast one way (I.e. pushing in the clutch pedal) and travel slower when releasing the pedal so it would ease with the shock between shifts

If they make something like this can someone please point me i n the right direction thank you

 

Tilton makes the valve.

 

Yep tilton, its called a flow control valve. It comes with 3 pills to choose from.

 

Clutch master makes one to that you don't have to rebleed when you change the pills

 

running a tilton one with the biggest pill
clutch masters also makes one.

 

how do you like it?

 

Has anyone logged the slip time with a FCV??? Just curious how long it took to reach 1:1 (rpm:input shaft).

 

You mean by comparing engine rpm to mainshaft speed? If so, at what rpm?

 

I guess different launch rpm's would cause different amounts of slip. What I'm looking for is the elapsed time from when you dump the clutch to when the input shaft matches engine rpm (clutch fully engaged).

My wife's uncle races pro mod motorcycles and it was interesting to look at logs from bikes with slipper clutches and adjust based on time from clutch switch to 1:1 shaft speed.

 

http://magnusmotorsports.com/product...ontrol-device/

http://www.youtube.com/watch?v=HM1iGSuNU7E

how about this !

 

The magnus control valve is only for launch, it is based off a line lock setup, so after the launch it becomes disengaged and doesn't help for any other shifts.

 

Seems to work pretty well so far. haven't had any problems with it.

 

this is the data we use to tune the clutch/pressure plate on our car

 

Do you have a slipper clutch or a fcv on a standard clutch? Do you mind sharing what you see for elapsed time to fully engage?

 

Fluid is too inconsistent to really do anything with it, it is very prone to temperature changes. Along with the throw out bearings that are currently available.

 

Are you guys still using clutch when shifting?

 

Yes.

I know nost people use these valves for reducing shock to the drivetrain, but I see some other benefits if you played around with it. Btw, I'm just toying with the slip at launch, not the rest of the shifts. I'm sure you see where I going with this

 

Good point. There are synthetic fluids out there that hold their fluid dynamic properties over a larger heat range... just a thought if you were really try to dial this in.

Miller, have you played with fcv's to purposefully slip the clutch? Pro and cons other than fluid inconsistencies?

 

I see what you mean. We don't use the fcv.

I don't see how you could tune the clutch/pressure plate without logging the engine vs input shaft rpm. That's the only reason to know whats going on between shifts

 

NICE...IT DOESNT BURN THE CLUTCH?

 

Andy, I've been logging this and have run the Tilton FCV with all 3 pills. Even the smallest pill does not slow the clutch fluid enough to do what you are trying to do with it.

 

I played with the FCV in the past and James is dead spot on. The tilton piece is not what you are looking for.

I made one for my car a little while back that has 10 settings of slip. It's pretty trick just didn't see any consistency with the fluid. I tried different fluids and it was just to
Unstable to get it how I wanted. Maybe if I dedicated my time and energy to it I could figure it out but I have moved on from it.

This will destroy clutches! Carbon clutches don't deal with the heat and make it hard to work with due to how they also react to heat.

 

Do the RWD guys that run slipper clutches use different friction material?


This will destroy clutches! Carbon clutches don't deal with the heat and make it hard to work with due to how they also react to heat.

 

Interesting. I think I still need to try some stuff.

 

Really? I thought the purpose of a carbon clutch was to tolerate higher heat levels..?