early 944 brakes, stock MC....dosent feel right

[Che Castro]

I had a look at shad's calculations. how come there is no multiplier for the number of pistons in the caliper?

[Jeza]

Originally Posted by Che Castro

I had a look at shad's calculations. how come there is no multiplier for the number of pistons in the caliper?

Good question!

I can't say as I know the answer to that, but hopefully some activity on here will lure in a hydralics / fluids engineer to answer


Cheers
Jeremy

[Wally]

AKAIK, the two pistons in a 4-pot caliper are never the same diameter, so you must simply add the two of them. Surface is surface after all.

Greetings,
Walter

[Jeza]

Wally

I think Che might have been refering to the 2 pistons such as in a standard ghia calliper with 2 40mm pistons.

Some one in our club explained it to me a while back but I completely forget it now. However there was something about just using the area of one piston for some reason.

Cheers
Jeremy

[super vw]

Well, i just got my hands on a early 911 (73 targa) MC. i mounted it up, but have not plumbed it yet (still waiting on parts). it bolts right in. i think i is a 19mm?

anyways, i will give this a try to see how the pedal feels once i get it plumed up. If this dosent work out. i will try to find a used 944 MC to try. i want to find the best "bolt on" option, and it seams like a lot of porshe stuff shares the same mounting holes.

[Che Castro]

Yep i was referring to the post that was linked on one of the earlier pages.

What I didnt get was why the number of pistons on each caliper wasn't included.

[VWader04]

has anyone used or heard about using the
CSP #611 015 000
i heard some where that this would be a good option...but, i don't know though..im in the same boat as everyone else

20.64mm bore CSP master cylinder