Hydraulic clutch qun.....??

Guys, Im in the process of setting up my hydraulic clutch in the Toyota 5 spd trans Ive adapted to my 8BA Flathead.

Realistically, how much clutch fork movement is required /sufficient to allow proper gear changing once the pressure plate fingers hit the thrust bearing?

Any tips?

Rat

 

I used a Datsun set up once and I think it moved about 1/2 inch or so. You can get an exact reading if you crawl under a Toyota pickup and work the clutch. How did you adapt the Toyota trans to the flathead? The Toyota pickup rear end is the perfect width for a '27 T, 5" X 4 1/2" wheel bolt pattern too. That combo would be really slick; trans, rear, driveshaft, hyd. clutch, etc. with the flathead. Thanks,

pigpen

 

Hi PP,

I used a cast iron 8BA bellhousing....its almost an exact bolt on except for two trans mount holes. Flatoz already has one in his ride.

Ive attached a pic !!

Anyone else have any tips re a hydraulic clutch setup ?

Rat

 

Hi RB. That's amazing. What year/model trans are we talking? If you used the cast iron 8BA bellhousing, that would mean that the 59AB would bolt right up also. I would ***ume that the flywheel is Ford, pressure plate also Ford, and the clutch disc would be from the Toyota. What about the pilot bearing/bushing? The photo doesn't show the fine details but your installation looks impressive. Thanks a lot,

pigpen

 

If you're talking where the fork and the slave cylinder contact each other I would think more than a half inch of movement will be required. Why don't 'cha just use the slave and master from the toyota?

 

Sorry cant help on this one Rat , as you know mine still uses that mechanincal set up, but this will put it BTTT so hope someone else can chime in...

 

The leverage ratio in SOME pressure plates is in the area of 9:1 on the "fingers"ressure ring, so to get .020" gap (total) in the flywheel/disc/pressure ring would take .180" of throwout bearing movement. Then take the leverage ratio of the clutch release arm into consideration and it all adds up to quite a bit of movement in a slave cylinder. Hope this helps.

 

BTTT

 

After doing some fabbing work on Sat nite in the shed, I have plenty of movement now.

I think Im gonna have to move the slave cylinder CLOSER to the fork so that the pushrod doesnt have to extend out of the bore so far.

I feel this will keep ithe pushro more stable int e slave cyl's bore. Im also getting a bit of flexing on the cyl mount when the clutch pedal is pressed in all the way in.
Might call fo a beefier mount than the one I have...

Ill post pix when done....thanx for the tips.

Rat