5Toes 5er

[lolcantturn]

You need a hand clutch and yes it is possible. Been done plenty-o-times.

[LJ851]

Well LJ - please help explain it to me.

I calculated a couple months back how much fluid a stock e30 master pushed - and that of a Wilwood Universal Motorcycle M/C and I found that the universal motorcycle part did not push enough fluid.

This is probably correct.

I mentioned a shim because that would effectively reduce how much fluid the master cylinder would need to displace - correct?

This is not correct. Hydraulic fluid is not compressible, a shim will not change the hydraulic ratio.

When you push the MC piston, a column of fluid the diameter of the MC bore is moved. It travels down the line to where it enters the slave cylinder and creates a column of fluid the diameter of the slave bore. If they were equal diameter they would be the same length. If the MC is larger diameter, the slave column will be longer and vice versa.

This is the hydraulic ratio. You can't change it by shimming anything.


Edit: Didn't we already beat this horse ? I'm not busting your balls, ok maybe a little, i really would like to see you with a manual trans.

[5Toes]

Yes, but say I need to push the slave cylinder out 15mm but my master cylinder is only able to push it 12mm - I couldnt shim it 3mm ? (granted that if I shimmed it 3mm it would not slip the clutch at all).

Anybody have any ideas on a hand clutch? I am likely going to return this floor mount pedal for a swing mount one... its too bad that they are nearly identical except the angle of the pedal on the arm.

[LJ851]

Yes, but say I need to push the slave cylinder out 15mm but my master cylinder is only able to push it 12mm - I couldnt shim it 3mm ? (granted that if I shimmed it 3mm it would not slip the clutch at all).

No. You can move where the 12mm of motion starts or stops (within reason) but it will always have a 12mm stroke with that mc/slave combo. If you need more stroke (15mm) you will need a larger MC or a smaller slave.

With some relatively simple fab work you could have a hand operated clutch lever, the challenge will be getting it to be light enough to not kill your hand and get good "feel" or modulation.

[5Toes]

^ exactly. I would rock this electro clutch all day but it would be very expensive to buy, or even to make myself (and I dont have the know how).

a swing mount clutch will likely be the easiest way.. just will need to make a new kick panel and stuff

[iansane]

What about an electronic solenoid to actuate the slave? Motorcycle/bicycle handle attached vertically on the shifter handle that activates the solenoid through a pwm? Gives you a bit of slippage for starting.

Edit; missed the last post.

[TheTacoMan]

What if you used a hand controlled throttle? Thinking out loud, not sure if this would work at all.

[dmessent]

a swing mount clutch will likely be the easiest way.. just will need to make a new kick panel and stuff

This apparently is only $500:

http://sci.rutgers.edu/forum/showpost.php?p=1704725&postcount=10

After watching the video I don't know why you would do anything else.

[marines2060]

came across this thread and thought id share this video with you. At my work i take care of my boss' good friends car, its a 65 mustang he takes to track days. Its all hand controlled due to him not having use of both of his legs (motorcycle accident) so when he was building the car he had this set up installed. Him pushing down in the lever is gas, and pushing it in is brake. He has a trick tranny too, don't know how it works but its been fiddled with so he can shift where he wants to in a certain set up, or just put it in drive and go. Not saying to do this or what not to do, just thought you'd get something out of it, inspiration maybe? He goes out a lot to track events, and is in a fast group. Its kinda hard to see and its a bad video, but he was driving the wheels off the car.

[5Toes]

^ very cool and way to go for your boss!!!

Got my new cooling sytem stuff in but couldnt get the one auto tranny cooler line to thread... ugh

[5Toes]

got out and took some pics today



"blunts"















CLEAN :)



and my favorite:

[5Toes]

New radiator and water pump and thermostat has been in for over a week, no leaks that I can tell :)

My clutch fan on my car spins almost perfectly but it wobbles Id say less than a mm so it seems... my old water pump that failed was a GEBA with the cast impeller.

I had the chance to compare 2 grafs (1 new and old), a GEBA, and a OEM BMW water pump on the bench... the GEBA was pretty nice but the graf impeller definitely has more surface area.

Car is running great and turning heads!

[5Toes]

I got this hood for free. It had a bent over corner and a few small dents so I straightened it out and had some fun with it. Definitely a 3 person job to change the hood on this car!

[JasonC]

free or not, rust is a crime.... :down:

[kamotors]

Noooooooooooooooooooooooooooooooooooo!