Help!! beams 3sge ae86 NO CLUTCH!!

[86er]

Hi guys I have my beams swap just about done but not gettin any clutch for some reason i have my stock ae86 clutch master, and using altezza 6spd so box has on the altezza stock slave, I have a custom line goine directly to it. I am getting pedal feel and the slave is moving the fork but clutch isnt disengaging, bled it quite a bit already. We also tried lengthening the rod in slave twice now doesnt seem to be pushing it any further dont know if i needs to be made even longer will try that. Any advice. assuming the ae86 master too small to push altezza slave, anyone knows any larger masters i can fit? maybe i could fit ae86 slave in altezza box? are there any bolt in larger clutch masters or easily modified ones?

Thanks alot

[oldcorollas]

do you know the size of the pistons in both the AE86 adn the altezza masters?

[LeeRoy]

As OC said you need to find the bore of the master as the altezza one might be bigger and your AE86 one mightnt push enough fluid. Keep in mind if you drop the size of the slave on the altezza box (assuming the 86 one is smaller) then you will end up with a harder pedal than what is in an altezza.

Have you pulled the carpet out of the way from under the pedal. Sound deadening and carpet removed will give around another 1 inch of travel.

[oldcorollas]

Keep in mind if you drop the size of the slave on the altezza box (assuming the 86 one is smaller) then you will end up with a harder pedal than what is in an altezza.

is that true? hmmm

[LeeRoy]

Trying to move the same force with less fluid so it seems logical to me. Its late though and i could be wrong

Edit: I think i am wrong. Pedal resistance will come from master cylinder size and clutch pressure plate. The size of the slave will only affect travel of the piston - and therefore amount of disengagement achievable.

[oldcorollas]

the ratio of master to slave will set the pedal force and the travel...
ie, assume you use maximum pedal (MC) movement to get maximum clutch movement... the ratio of fluid movement is fixed, and so the force is also fixed.
if you increase MC stroke, you can decrease pedal force, but decreasing MC stroke (ie, pedal movement) will only increase force.

what might be happening here is that the MC is far too small, so the pedal force is low, but the travel is not enough...

the same equation as from the brake thread, applies here.. with a tweak for clutch movement

[Grega]

i had a similar problem in my ta22 when using a different slave.
initially i was getting some pedal, but, clutch would not disengage thats all.

all i did was adjust the length of the rod on the ta22 master and all was well - its a bugger of a job but worked a treat.

hth

[86er]

i had a similar problem in my ta22 when using a different slave.
initially i was getting some pedal, but, clutch would not disengage thats all.

all i did was adjust the length of the rod on the ta22 master and all was well - its a bugger of a job but worked a treat.

hth

just did that it worked i got to drive my beams 86 yehhhhhh but now it seems lengthing the rod like i did before is cuasing the cluth to not disengage propperly as it rakes everytime i come off in any gear so we will have to shorten it again

here are some piics of project thanks all for help
whole build up here
http://www.aeu86.org/viewtopic/ae86/p/82517

[oldcorollas]

just did that it worked i got to drive my beams 86 yehhhhhh but now it seems lengthing the rod like i did before is cuasing the cluth to not disengage propperly as it rakes everytime i come off in any gear so we will have to shorten it again

so what was the problem? was the rod to the master too long or too short?

i'm assuming that you had not modified the master part before, so it was working previously with the AE86 slave?

if the piston in the slave is not bottoming out on disengagement, then is the rod too long? or is there pressure remaining in the system cos the "bleed hole" in the master is not being uncovered now?

[Grega]

mmmm. shades of bills setup.
i'm wondering whether your master/slave setup might be a wee bit too small if its still not disengaging correctly...

[86er]

well im using the altezza slave had to make the rod longer to get more out of master think the disengagement issue is related to lengthened rof, we added over an inch on it (started with a 1/4" and went up when nothing changed) so its really long so will cut that back to original length first see what happens as lengthing wasnt doin anything no extra movement came out of that

["Z" UTE]

What clutch and pressure plate did you use?

[86er]

standard altezza ones, i have a lightened flywheel

[Grega]

86er try shortening the slave cylinder rod back to its normal size and try that

[allencr]

cluth to not disengage propperly as it rakes everytime i come off in any gear so we will have to shorten it again

What does 'rakes' mean????

It has to be long enough for the piston not to pop out of the slave, and short enough so that the piston doesn't bottom out in the slave, that's all.

To get the most travel out of the current MC & slave size, adjust the pedal by its stop, as high as it will go. Then adjust the pushrod clevis to lengthen the pushrod, removing slack, until just before the clutch MC piston closes its port to the reservoir. If you can't push in the slave piston, you've gone too far, so shorten the MC pushrod adjustment until you can easily push fluid from the slave back into the MC.

Bad pressure plate and/or install, and very unlikely to be gross MC & slave mismatch.