Ok, I'm still a noob when it comes to trannys but I have a question for the tranny gurus and Civic/H22A guys that may end this thread quick, or cause some good discussion.

I notice a lot of posts about H22 Trannys not being able to handle excessively high revs. I'm just wondering if there is any chance that shifting problems can occur when the clutch does not displace as much as it should Via the slave cylinder.

I don't have any pics but I know off the top of my head the Prelude master cylinder is significantly bigger. I'm also thinking about measuring the difference in the slave cylinder displacement between an H22 civic and a Prelude.

I'm just wondering if anyone has ever put any thought into this? or if any tranny experts want to comment on clutch displacement vs shifting issues.

Thanks

 

I have no clue, but you can buy my M2B4 if you want.

 

you may be on to something.

 

I'm surprised that no one has shoot down this theory yet. maybe I am on to something?

I'm going to find a way to measure the displacement of of the slaves and talk to my good buddies from the "Mr. Transmission" to see what they have to say.

Rottie, my tranny is in mint condition! That's why I'm questioning why everyone is blowing up trannys. I used to smoke D-Series trannys one after another but my H22 one has held up quite nice after a summer of pounding on it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2point2 &raquo;</TD></TR><TR><TD CLASS="quote">I'm surprised that no one has shoot down this theory yet. maybe I am on to something?

I'm going to find a way to measure the displacement of of the slaves and talk to my good buddies from the "Mr. Transmission" to see what they have to say.

Rottie, my tranny is in mint condition! That's why I'm questioning why everyone is blowing up trannys. I used to smoke D-Series trannys one after another but my H22 one has held up quite nice after a summer of pounding on it.</TD></TR></TABLE>

Hmmmmm...maybe you have stumbled upon something. Pure genius.

 

What if your onto something? Ahaha, had too. In for the info though.

 

huhhhhhhhh

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2point2 &raquo;</TD></TR><TR><TD CLASS="quote">Ok, I'm still a noob when it comes to trannys but I have a question for the tranny gurus and Civic/H22A guys that may end this thread quick, or cause some good discussion.

I notice a lot of posts about H22 Trannys not being able to handle excessively high revs. I'm just wondering if there is any chance that shifting problems can occur when the clutch does not displace as much as it should Via the slave cylinder.

I don't have any pics but I know off the top of my head the Prelude master cylinder is significantly bigger. I'm also thinking about measuring the difference in the slave cylinder displacement between an H22 civic and a Prelude.

I'm just wondering if anyone has ever put any thought into this? or if any tranny experts want to comment on clutch displacement vs shifting issues.

Thanks</TD></TR></TABLE>nice, someone test this theory

 

the smaller slave cylinder can cause shifting problems. I have personally worked on a couple hybrids that had shiftingproblems using a slave cylinder from a fully functional SOHC swap.

A stiffer pressure won't help the situation either....

 

I was told to use a prelude slave and civic master. I have a prelude master and slave, but havn't put either on yet becuase i don't wanna break anything lol

 

bump for more info

 

The only thing that would influence the clutch directly would be the stroke of the slave. That should be fairly easy to measure if someone had both slave/master setups on a bench.

What exactly would change the stroke of the slave? The master cylinder. I doubt that changing the slave would make a difference. It just moves as far as the pressure from the master tells it to.

 

all i can see is that if a civic master has a smaller bore and stroke then less fluid is displaced meaning the prelude/accord slave cylinder will not move nearly as much. either a larger displacement master or smalelr displacement slave would be needed to make it all work right. I have a lude master cylinder new in teh bag from honda but cant really tell if it is externally larger or smaller than teh civic setup in my car.

 

I love tranny's

 

The size of the piston has no relevance. Just increases or decreases the felt pedal pressure.

 

had to bring this back from the dead

 

bumb also interesting

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by glockhead &raquo;</TD></TR><TR><TD CLASS="quote">The size of the piston has no relevance. Just increases or decreases the felt pedal pressure.</TD></TR></TABLE>

I believe this is incorrect..
there is a ratio of MC volume displacement to SC volume (MCV:SCV.) If this ratio is changed (ie smaller displacement civic MC) the effective travel of the SC piston will decrease as its volume is unchanged.

Therefore a larger volume master cylinder will actuate the slave cylinder further and sooner than a smaller master cylinder will with the same pedal travel, it stands to reason that this could cause shifting problems when hard shifting.

Omni power makes a larger volume MC.

I'd love to see someone dismantle and take some measurements of the two MC's, but as with most nissin products I believe the larger size of the prelude MC denotes a larger piston bore and larger MC displacement.

 

interesting....

so putting a larger MC on a h22/civic could be beneficial...? no?

from all this im thinking so..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondaZvic &raquo;</TD></TR><TR><TD CLASS="quote">interesting....

so putting a larger MC on a h22/civic could be beneficial...? no?

from all this im thinking so.. </TD></TR></TABLE>

It would probably help, however pedal pressure will seem a little more, and you should probably have an expansion valve to avoid damaging the slave's seals with too much pressure. I just took a look at my EG6 and BB6; the clutch master cylinder sizes are the same, 5/8". The reason the prelude MC looks bigger is the valve on the side of the cylinder. Its overall length appears to be the same too.