Clutch hard line compatibility
 

Will clutch hard line from an FB fit an SA?

the thread pitch is different.

You can use it if you also use the FB hardline and slave cylinder and master cylinder. All 1st-gen clutch hydralics bolt in to the same spot, the only differences are the SAs have the coarse pitch threads (10x1.25 instead of 10x1.0), '83-up 12As have a differently shaped slave so you can reach the bleeder screw with the oil cooler in the way, and I'm pretty sure that GSL-SE master cylinders have a restrictor/damper in them.

Like others already said, it's a difference of thread pitch. I personally swapped my SA over to FB clutch hydraulics (although unintentionally at first) and the largest perk of doing so is that it's far easier to find braided SS lines for. SA stainless lines seem to only be available from a couple places.

Awesome thanks guys!

peejay, I wondered why the GSL-SE had a large bolt installed in the master while the 12A cars just had a threaded hole for the hardline. Why would the GSL-SE cars need a restrictor/damper? I'm wondering what purpose it serves.

Probably the same reason every other car with restricted clutch hydraulics got a restrictor - makes you less likely to turn the transmission into granola. Remember, at that point the GSL-SE was the heaviest car to get the smoothcase transmission, and second most powerful next to the 12A Turbo.

GSL-SE also got half as many friction disks in the limited slip, too.

Look in the single turbo section (I think), there is a member here who made a variable restrictor setup using nitrous orifices and a line-lock so he can turn it on and off. Sidestep the clutch and let the restrictor control clutch engagement!

When I went to SS clutch lines I needed a new hardline for my SA as well. The hardline end bits disintegrated on removal. At that point I just got the FB master, slave, hardline and SS line from Atkins and was done with it. Works great and was a total bolt in replacement best that I can remember.

" Probably the same reason every other car with restricted clutch hydraulics got a restrictor - makes you less likely to turn the transmission into granola. Remember, at that point the GSL-SE was the heaviest car to get the smoothcase transmission, and second most powerful next to the 12A Turbo."

Please explain, how does the restrictor protect the tranny??

Does the restrictor slow the engagement of the clutch, resulting in more slipping?