To go 15/16 or stay with 7/8 master cylinder

[AliK]

I ha the same thought Rob - the question is, would you be able to get those grub screws completely sealed again?

 

[Rob Gaskin]

I ha the same thought Rob - the question is, would you be able to get those grub screws completely sealed again?

I would imagine that they are a taper 'seat' like bleed nipples so yes.

 

[Woody928]

Was there any verdict as to whether there was an advantage to move onto the 15/16 master cylinder with the 4 pot brake calipers?

I hadn't realized there was extra faff in fitting them, the one listed on Silvermine is shown as a bolt on solution....

http://www.silverminemotors.com/dat...6-upgraded-master-cylinder-for-240z-260z-280z

 

[Bobafett]

Was there any verdict as to whether there was an advantage to move onto the 15/16 master cylinder with the 4 pot brake calipers?

I upgraded to the 4 pot Toyota Sumitomo calipers and was told that you'd need the bigger master cylinder to shove more fluid.

Must admit together with the S12-8 four pots & vented discs the braking performance is very much more responsive despite having very little difference in the brake pad area.

 

[toopy]

Was there any verdict as to whether there was an advantage to move onto the 15/16 master cylinder with the 4 pot brake calipers?

I hadn't realized there was extra faff in fitting them, the one listed on Silvermine is shown as a bolt on solution....

http://www.silverminemotors.com/dat...6-upgraded-master-cylinder-for-240z-260z-280z

Plenty of people seem to recommend the bigger master cylinder, but having driven Ali's car, the difference was barely noticeable, to me any way.

Certainly not different enough to make me feel the need to mess about with a 280zx one..... what a kerfuffle!

Maybe that one in the link has been manufactured to 'bolt on' i would hope so, certainly explains the extortionate price!

 

[AliK]

Woody, I have 2x 15/16ths both of which are sitting in my spares for the future box. I typically change one thing at a time on the car to learn about the difference "that" thing made.

Having done the callipers and discs first, I ran it with the 7/8ths to get the feel for it - the pedal does travel slightly further but frankly not enough to worry me + I find it makes heel to toe action even easier.

There is absolutely no issue with brake performance or feel and I can happily lock the wheels. I no longer have to "stand" on the pedal to do that. And this is why 15/16ths never met the car and quietly sleeping in the "keep safe" box.

The majority of the faff is basically adjusting the length of the rod pushing the cylinder, if you can find an early North South orientation 'M/C (like the silvermine one) and if you can't, then you have to modify your booster to fit an east west one by drilling holes etc, or buy a 280zx booster.

My advice is, do the brakes, see how the pedal feels to you, then decide if you want to change it. You can ALWAYS spend money [emoji6]

 

[Woody928]

Thanks guys, I've already got a 15/16 one sitting here waiting to go on when I get around to the brakes so was just curious to know about the difference. I need to dig it out but I believe mine will be bolt on like the Silvermine one. I can't even remember how long ago or where I bought it from! I'll see how I go as and when I sort the brakes out.

I like the idea of feeling the difference from each upgrade Ali, however I've just thrown that plan to the wind more recently. I guess I'm just too keen to get it back on the road asap to use it as much as is possible.

 

[AliK]

That's the trouble with young men, they want to do everything too fast, get it over with and miss out on the pleasure of the journey

 

[Woody928]

That's the trouble with young men, they want to do everything too fast, get it over with and miss out on the pleasure of the journey

Are we still talking about Datsuns?

 

[Alphabettispaghetti]

Are we still talking about Datsuns?

Or his knowledge of men