HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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Difference between Wilwood Brake MC and Stock Porsche Brake MC

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Difference between Wilwood Brake MC and Stock Porsche Brake MC

Post  Bluemach1 on Thu Oct 06, 2011 11:38 am

What is the difference between, or maybe better stated, the benifits of, the Wilwood 260-7563 versus the late model Porsche brake MC? The bore of the Porsche is 0.9" and the Bore of the Wilwood is 1.0".

Enlighten me....

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Re: Difference between Wilwood Brake MC and Stock Porsche Brake MC

Post  Bluemach1 on Fri Oct 07, 2011 1:50 pm

Anyone?

Even though I have purchased the Wilwood (not installed yet) I would still be interested in the benefits of one over the other. The more I think about it, the Porsche MC might be the easier route as the plumbing for the output ports is all set for it.

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Re: Difference between Wilwood Brake MC and Stock Porsche Brake MC

Post  xschop on Fri Oct 07, 2011 3:57 pm

It boils down to volumn requirements and If you are sticking on big 4-piston calipers, then the larger volumes are better but require more force. Since We removed our boosters (assuming just a firewall plate) then the pedal needs to be drilled upwards for more force. IMO the 944 MC is great for 4-pots no bigger than 41mm dia. up front and that's why the Rennbay band-aid kit uses 41mm Wilwoods, although they put them on stock rotors to fit under the 15's. I just built a 944 MC plate for a basic swap kit because I agree about the lines...they already fit. The only unknown (or it may have been posted on Gestapoville) is the stroke comparisons between 944 MC and Wilwood Tandem. I would suggest drilling the Pedal upwards by only 0.75" or 0.80" when using the 944 MC....My $0.02
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Re: Difference between Wilwood Brake MC and Stock Porsche Brake MC

Post  Bluemach1 on Fri Oct 07, 2011 10:34 pm

I think I am going to skip the Wilwood and go back to stock Porsche. I just like the idea of not having to mess with the lines. I'll need to modify my FW plate. I can use the dimensions you posted.
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Re: Difference between Wilwood Brake MC and Stock Porsche Brake MC

Post  Bluemach1 on Sat Oct 08, 2011 10:58 am

Taking a look at calipers again with xschop's notes in mind. I have the 4 piston 928 GTS Big Blacks. Piston sizes are 36 and 44 mm. Bigger than xschop's note on max 41mm. In addition to the BB's my plan includes moving the front calipers from the 944 turbo to the rear. Bias valve is 5/33.

I know I am not the first person to do this set up with stock MC. Albiet, the set ups that I read about did not include removing the booster...

Regarding fluid volume......
The only thing that is unknown to me is the stroke of the two MC's.

The bore advertised for stock MC is 23mm(0.9055")/20mm(0.7874"). Raybestos states 15/16 (0.9375")and 13/16(0.8125"). Wilwood is straight 1.0".

If I can find the stroke then the fluid volume can fully determined. Although, knowing this crowd, someone must have already done this exercise.

What I dont know at all is how much fluid is required to operate effecively the calipers that I have selected. Again, others have already done this conversion but I wonder with what margin??





Last edited by Bluemach1 on Sat Oct 08, 2011 11:01 am; edited 1 time in total (Reason for editing : typos)

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Re: Difference between Wilwood Brake MC and Stock Porsche Brake MC

Post  Arthropraxis on Sat Oct 08, 2011 1:39 pm

I have read on Rennlist that some would upgrade the stock master cylinder to one with higher volume after converting to big black/red front calipers and turbo front brake calipers moved to the rear. The reason for upgrading the master was too much pedal travel.
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Re: Difference between Wilwood Brake MC and Stock Porsche Brake MC

Post  Bluemach1 on Sat Oct 08, 2011 6:50 pm

Yes, I have seen a post on RL along those lines. I also recall there being some discussion with longer pedal travel after swapping attributed to ABS. No worries with that here. I would say that 99% of the posts that I read about this swap never mention an issue with increased pedal travel.

Well, the cool thing is that I havent installed the BB's yet and the stock rears are still on there. I can easily do this in steps and see how I like it...

I just ordered a new (remanufactured) MC for the new system.

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