jt1 Posted October 23, 2002 Share Posted October 23, 2002 Anyone know the bore dia. of the 240Z clutch master cylinder? I'm thinking of a hydraulic throwout brg and trying to determine if the Datsun MC will move enough fluid to operate the throwout brg. Thanks. John Quote Link to comment Share on other sites More sharing options...
blueovalz Posted October 23, 2002 Share Posted October 23, 2002 I currently am using a McLoed hydraulic throw-out bearing. I found that a 3/4" master cylinder is just about right (I believe PParaska will verify his usage of the same size). The OEM 5/8" will be too small (IMHO) and require too much pedal travel. Quote Link to comment Share on other sites More sharing options...
Guest jens Posted October 23, 2002 Share Posted October 23, 2002 I have a question for a friend. He runs a toyota transmission with a 20.6 mm slavecylinder adapted to a chevy 350. He has the pedal travel problem too and the pedal is not soft enough. Would a smaller 17.5 slavecylinder help or is a bigger master the only solution. Quote Link to comment Share on other sites More sharing options...
pparaska Posted October 23, 2002 Share Posted October 23, 2002 I agree with everything Terry said. Quote Link to comment Share on other sites More sharing options...
blueovalz Posted October 23, 2002 Share Posted October 23, 2002 Jens, If your friend's clutch pedal is too soft (lots of pedal travel should be associated with this too), then a smaller slave cylinder will help. But your post said it was not soft enough (too hard to push). To soften up the pedal pressure he would either need a larger SC or smaller MC, but this would lengthen the amount of pedal travel to disengage the clutch. The smaller SC or larger MC will increase the pedal pressure, but reduce it's travel. Quote Link to comment Share on other sites More sharing options...
jt1 Posted October 23, 2002 Author Share Posted October 23, 2002 Terry, what kind of master cly did you use? Is there a nissan one that works well or did you go with something like a Tilton? Thanks for the help. John Quote Link to comment Share on other sites More sharing options...
blueovalz Posted October 23, 2002 Share Posted October 23, 2002 I think it's a Girling, but it seems the bolt pattern for this and many other aftermarket MCs (Tilton too) are the same. This one matched the OEM bolt pattern very well and took a minimum of work on the installation (push rod behind it took a small amount of work if I remember correctly). Yes, Datsun used a 3/4" MC in their early trucks (which is what I used before finally having to buy a new one) that I believe were circa '69-'71? Quote Link to comment Share on other sites More sharing options...
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