Master Cylinder 17mm or 19mm Options

[kbrunk1]

OK my MC is leaking at the piston side.
Do most folks go with the $100 19mm MC or pay more for the 17mm one?

I assume you can not get rebuild kits for the 17mm correct?
I kind of like the idea of keeping the 17mm one but am on a tight budget.

Thanks Ken

[mrbubblehead]

i really like the "feel" of the 17mm. i like the modulation and feed back. with that said, i am in the middle of changing my brakes. i am going to the bigger bmw front calipers and replacing the proportioning valve with a T. so i may be forced to go with the 19mm master cylinder to regain what i like about the 17. we'll see.

if the feel of the brakes wasnt important to me, i would probly save the dough and go with the 19mm. if i wasnt making any changes and keeping the stock brake configuration, i would save up for the 17mm.

but if money is tight why not just go for a 19mm and see what you think? if you dont like it, keep your eyes open for a good used 17mm. i might have a 17mm available here pretty soon... i have seen some knock off 19mm on ebay for 65 bucks shipped.

[gothspeed]

i really like the "feel" of the 17mm. i like the modulation and feed back. with that said, i am in the middle of changing my brakes. i am going to the bigger bmw front calipers and replacing the proportioning valve with a T. so i may be forced to go with the 19mm master cylinder to regain what i like about the 17. we'll see.

if the feel of the brakes wasnt important to me, i would probly save the dough and go with the 19mm. if i wasnt making any changes and keeping the stock brake configuration, i would save up for the 17mm.

but if money is tight why not just go for a 19mm and see what you think? if you dont like it, keep your eyes open for a good used 17mm. i might have a 17mm available here pretty soon... i have seen some knock off 19mm on ebay for 65 bucks shipped.

I am doing something similiar ....... I have already installed the 911 size 19mm master and will be using the 48mm 911 M calipers up front. I think the 17mm master may allow too much pedal travel, when used with the larger 911 M caliper pistons.

I have contemplated going with a 'T' but since the factory p-valve only regulates pressure after the pressure reaches a certain threshold ........ so I am just gonna leave it in and see how it works. So basically it allows equal pressure on all calipers until that upper pressure level is reached .... then it tapers off the pressure to the rear calipers.

Leaving it in should not throw anything off in the 'wrong' direction (rears locking up) ..... if you are going with larger piston front calipers .......... If anything, one would need to raise that pressure threshold to allow the rear calipers to sqeeze harder. So they can 'catch up' to the higher clamping force of the larger front calipers ................

That said, I have read about others on here going with the rear 'T' when using larger front calipers .......... and ended up with good results.