chris280z Posted September 7, 2010 Share Posted September 7, 2010 (edited) I am setting up a 1977 280 z for a SBC and WC T5 GM manual trans. I purchased a Mcloed 1400 series hydraulic throwout bearing assembly,lightened GM performance flywheel & zoom performance clutch. Will the stock Datsun 5/8" master cylinder work or should I consider an upgrade? Edited September 8, 2010 by chris280z Quote Link to comment Share on other sites More sharing options...
GOTHALOSISM Posted September 8, 2010 Share Posted September 8, 2010 Get a Tilton 7/8bore master. Quote Link to comment Share on other sites More sharing options...
chris280z Posted September 8, 2010 Author Share Posted September 8, 2010 Get a Tilton 7/8bore master. The only reason I considered the stock is that I received a brand new stock master cylinder with the car when purchased. Dont want to cut myself short so I took your advice I ordered one through Summit this morning $85.00+ shipping, not bad! Quote Link to comment Share on other sites More sharing options...
GOTHALOSISM Posted September 9, 2010 Share Posted September 9, 2010 Good thing, the stock master will not allow your clutch to engage/disengage correctly. Quote Link to comment Share on other sites More sharing options...
bjhines Posted September 11, 2010 Share Posted September 11, 2010 I have the same flywheel/clutch combo with the external Wilwood pull-type slave. I am using a 7/8ths master and the clutch pedal takes a lot of effort. I don't mind on track, but manuvering in the parking/garage lot is hard on the left leg. Quote Link to comment Share on other sites More sharing options...
chris280z Posted September 15, 2010 Author Share Posted September 15, 2010 I have the same flywheel/clutch combo with the external Wilwood pull-type slave. I am using a 7/8ths master and the clutch pedal takes a lot of effort. I don't mind on track, but manuvering in the parking/garage lot is hard on the left leg. I spoke with tech at Mcleod, they said 7/8" bore was recomended for high performance use, the 5/8" bore is acceptable & with the longer throw it will have a softer feel. I have a feeling I'll be torturing ol' projekt-z a little bit so I opted for the Tilton 7/8".....i still have good knees! Quote Link to comment Share on other sites More sharing options...
bjhines Posted September 16, 2010 Share Posted September 16, 2010 (edited) For me the throw on the pedal is just right with the 7/8" master. I have reinforced the firewall and pedal box mounting areas. Given the issues with pedal throw being limited and worn out linkage parts adding to the problems; I don't think anything else would work. Edited September 16, 2010 by bjhines Quote Link to comment Share on other sites More sharing options...
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