Thatâ??s a problem I too have been dealing with, right down to the description
of the clutch working like a light switch!
Thanks
Hmm, do you think that it was the slightly longer push rod or the slave
cylinder??
Lester
> On Jan 18, 2022, at 3:16 PM, Michael MacLean via Spridgets
> <spridgets@autox.team.net> wrote:
>
> Since I did a Datsun transmission swap to my 1275 powered Bugeye I have
> always had a terrible clutch. The conversion kit is from Paul A before he
> passed so you can get an idea of how long I have been living with this
> clutch. Per Paul I used a Datsun clutch with a re-machined 1275 flywheel and
> th eoriginal 948 drum brake slave cylinder. I was assured this would all
> work out by paul. Well, it worked, but the the clutch pedal went from a
> normal pressure and travel with my 948 and smooth case trans setup to a
> nightmarishly hard clutch that had to be depressed all the way to the floor
> and grabbed immediately when it was brought up resulting in all the clutch
> action happening in the first few inches of travel back up from the floor.
> It essentially acted more like an on and off switch than a clutch. To
> facilitate this arrangement I had a combination master cylinder using the
> brake bore of the original 7/8" for the 4 drum brakes I retained in the car
> and a 3/4" re-sleeve on the clutch side for the Datsun clutch. I thought I
> was stuck with this arrangement. As some of you guys know, I have just got
> around to converting the front brakes to disc. As part of this conversion I
> bought an AP Lockheed 3/4" double bore master cylinder. This made no
> difference to the clutch effort as the clutch bore did not change. I don't
> know why, but I came to the conclusion that a 1275 slave cylinder would be
> better for the clutch pedal effort as I now had a 1275 in the car. As I look
> back on that thinking, it is rather flawed. Yes, I had a 1275 in the Bugeye,
> but I had a Datsun transmission and a Datsun clutch in the car. Wouldn't that
> require a Datsun slave cylinder? Well, out of my ignorance I had the 1275 1"
> bore slave cylinder installed in the car with a slightly longer slave pushrod
> and bled the clutch with a pressure bleeder. Holy crap! The clutch pedal is
> now to an almost normal amount of actuating pressure and the engagement
> travel is more like a normal clutch. I am one happy camper! Just wanted to
> pass this along if any of you guys with a similar setup is experiencing the
> same "on/off" switch syndrome with your Datsun trans conversion.
> Mike MacLean
> P.S. Just in time for spring and summer!
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