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

[hot66]

Originally Posted by Jeza

Hello all

I have been meaning to reply for quite some time to let people watching this thread know how I got on with the 944 MC.

Well it took a bit of fiddling to make it fit which is why its taken so long. I ran 2 new front hardlines, and a short section to a T piece for the rear line. On the T piece I fitted the brake light pressure switch. I'll see how well this works, but have heard that its a bit slow to react. If need be I fit a micro switch to the pedal cluster.

The way I fitted the MC is nothing new, but being a RHD car I did discover that my rear line exits very close to the brace under the spare wheel well. This required a really tight curve to the brake line and also a bit of clearancing to the brace (punch and big hammer). I've also bolted the T piece to a bracket to support it, which I had noticed many people hadn't.

So its mostly bleed up and the pedal feel and travel is 100 times better. I have much less pedal travel than with the Bug master cylinder. The travel is about the same as a Bug MC and stock discs & drums. I have not driven the car yet, but that is hopefully getting closer and I can report back to any that are interested on how it stops and feels then.

Cheers
Jeremy

Were the later VW reservoir fittings you mentioned earlier correct for the 944 m/c ?

[Jeza]

hot66

I can't say for sure about the VW fittings for the remote reservoir lines as mine didn't fit. My master cylinder is a stock one from a '71 1302. Ricola used the fittings from his Beetle master cylinder in the Porsche master cylinder but did mention that his Beetle mc was an after market one.

I found some fittings that did work successfully on an old BMW (7 series from '70s).

I don't know if VW changed the Beetle mc on later models than mine.

Hope this helps

Cheers
Jeremy

[super vw]

So, s-beetle or 944 MC?

[Jeza]

Jonathan

Sorry I havn't come back with any more info, the car is requiring some rust repair, and I have been waiting to borrow a welder. I say the car will be back on the road soon, but not being the worlds fastest worker it is likely to still be a couple of months.....

However I would go 944 MC (In fact that is what I have done ) , and from comments on this thread and others that would be the general consensus for the best MC to match the 944 NA brakes.

Good luck

Cheers
Jeremy

[Angelo Amato]

I found a WONDERFUL www for us brake-a-holics !

see my other posting under brakes !

ENJOY !

[judgie]

just to let you know ,i used the 944[19/23]master and 944 n/a brakes.
19 to the front and 23 to the back.no dive on brakeing very hard and stops very very well indeed thank you,i think the wheel selection makes a big differance in brake perfomance as well ie;i run 7x16 with 205/55/16 on the front and 8x16 with 225/50/16 on the back so my trye split also helps with the rearwood brake bias.
cheers rob

[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

[Pillow]

This might be a good option as well:
http://cgi.ebay.com/ebaymotors/ws/eB...sPageName=WDVW

a 23mm 911 master fitted for the early 911s.

[Jeza]

Thanks for the post Matt

Someone else speaking sense to reinforce the important points.

CU
Jeremy