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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Clutch Master Upgrade

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Re: Clutch Master Upgrade

Post  968ls1 on Mon Dec 21, 2009 11:57 am

Looks good!

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Re: Clutch Master Upgrade

Post  xschop on Mon Dec 21, 2009 12:42 pm

1/8 NPT or 1/4 NPT....

some confusing sh*t. I thought these were different bores.... scratch
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Re: Clutch Master Upgrade

Post  968ls1 on Mon Dec 21, 2009 1:23 pm

Yea you will need an adapter from the master to the -4 hose. The part number is 555-100210 from Summit $4.49.

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Re: Clutch Master Upgrade

Post  xschop on Mon Dec 21, 2009 1:36 pm

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I ordered this one after talking to Greg. The pics between the two adapters are identical That's why I thought the bore diameters were different and NPT meant a standard thread. There should be a thread(no pun intended) started about all the different types of threadings. When you say 1/8 to me I take it the O.D. of the threads are 1/8"... The Wilwoods are bored like 3/8".... Everything should go metric and call it a day. lol!
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clutch update

Post  turbobob924 on Mon Dec 21, 2009 3:50 pm

This may be wrong thread but it is related...

I found out my current setup (8.5 sintered iron racing clutch) was an good shape and only needed one part replaced so I'm not going to switch to a twin disk setup like I was think I had too.

While at quartermasters, I was talking to them about how much pedal effort was required to work the racing 8.5 setup. They said that going to a smaller diameter MC with more travel would fix the pedal effort issue. The clutch I have is designed for a 3/4 MC. So if the 94 stock is 7/8, that's why it takes so much effort!

I am not sure it the factory 944 clutch MC is 7/8 or 3/4???? Can any confirm which?

I see that wilwood has a compact one that you can get for like $50 and has a .70 diameter cylinder.
This is what I am going to try.

wilwood part no 260-6579

Merry Christmas to all!
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I call travel

Post  xschop on Mon Dec 21, 2009 4:05 pm

If there is enough travel in the 944 pedal for a smaller dia. MC, then great. But the problem is the 3/4" stock MC doesn't push the Standard Pressure Plate splines in long enough to get good disengagement and the grinding commences when the plunger in the stock MC wears. For a super stiff PPlate what you are doing is the right idea. Just hope you have enough pedal travel and find a master with long enough throw....
Merry Christmas to you and yours and a Happy Hybrid Year to come.....
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Re: Clutch Master Upgrade

Post  turbobob924 on Mon Dec 21, 2009 4:33 pm

merry xmas to you too and thanks for the feedback.

Yes I need to make sure there is enough travel but in my case, this clutch is like a button. It requires very little travel to engage it and I had to put an adjustable pedal stop in as it wa able to travel too far!

I believe the wilood MS has 1.4" of travel. S/B more than enough.
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Mr Sloan

Post  xschop on Wed Dec 23, 2009 10:52 am

Do you have these dims handy? I won't be crawling in that damn crawl space for a while....
And are these Clutch pushrod and clevis the same for all years 944?
I found that the 7/8" Wilwood pushrod is NOT 113mm (end to flange) like the PDF file shows, but 104mm TOTAL LENGTH END TO END. I have decided to make a custom clevis and reuse the Wilwood pushrod because the compression head is a unique design and stronger than a 7mm hemisphere, plus it incorporates a catch . I'll just make a longer clevis and tap it 5/16-24 and keep the willwood pushrod catch that the 944 pushrod doesn't incorporate, and call this mod DUNDEE.
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Re: Clutch Master Upgrade

Post  gt1scca on Wed Dec 23, 2009 11:22 am

xschop wrote:And are these Clutch pushrod and clevis the same for all years 944?
I found that the 7/8" Wilwood pushrod is NOT 113mm (end to flange) like the PDF file shows, but 104mm TOTAL LENGTH END TO END...
Son of a...

Total PR (stock 944) length = 112 MM
Clevis length = 40 MM
Clevis "pin" (on pedal) = 10 MM DIA.

xschop wrote:I'll just make a longer clevis and tap it 5/16-24 and keep the willwood pushrod catch that the 944 pushrod doesn't incorporate...

Make me (1) while you're at it.

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1 more dim

Post  xschop on Wed Dec 23, 2009 12:06 pm

minor detail but critical....
what is the clevis "pin" center to threaded end or back end?

Heck, I need all 4 dims
Santa will get one out to you......Merry Christmas

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Re: Clutch Master Upgrade

Post  gt1scca on Wed Dec 23, 2009 12:12 pm

Total PR (stock 944) length = 112 MM
(#1) Clevis length = 40 MM
(#2) Clevis thickness = 10 MM
(#3) Clevis width = 16 MM
(#4) Clevis "pin" center to threaded end = 32 MM
944 PR thread length = ~28 MM
Thread depth in Clevis = 22 MM
Clevis "pin" (on pedal) = 10 MM DIA.

Anything else, santa ?

"Hoooo. Hoooo. Hoooo..."

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Re: Clutch Master Upgrade

Post  xschop on Wed Dec 23, 2009 12:46 pm

Not having to crawl up under there at 20* outside temp is a great present to me thanks bro. santa
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Re: Clutch Master Upgrade

Post  Arthropraxis on Wed Dec 23, 2009 1:00 pm

Is there any use for the Pcar slave rod? It looks longer than the master cylinder rod.
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Inquiring minds WTK

Post  xschop on Wed Dec 23, 2009 1:05 pm

7/8" Wilwood MC stroke = 36mm
3/4" 944 MC stroke = 36mm
What LUCK!.....santa
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Re: Clutch Master Upgrade

Post  xschop on Wed Dec 23, 2009 1:20 pm

[/quote]Is there any use for the Pcar slave rod?[/quote]
Paperweight
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Re: Clutch Master Upgrade

Post  gt1scca on Wed Dec 23, 2009 8:25 pm

968ls1 wrote:Yea you will need an adapter from the master to the -4 hose. The part number is 555-100210 from Summit $4.49.
Part numbers must have changed...

From SummitRacing.com:

-3 AN Male to 1/8 in. NPT Male Fitting
Earl's Performance 982203ERL

90 Degree, -4 AN Male to 1/8 in. NPT Male Fitting
Aeroquip FBM2031

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Re: Clutch Master Upgrade

Post  turbobob924 on Tue Dec 29, 2009 4:24 pm

THis is great stuff!
Very nice pictures and dims too!

Im interested in more information on the "custom clevis".

Is it made of brass?

Was it totally made form a solid block or something that you "tweaked" to make work?

My new MC is on the way from summit!
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Re: Clutch Master Upgrade

Post  gt1scca on Tue Dec 29, 2009 7:15 pm

turbobob924 wrote:...the "custom clevis".
Is it made of brass? Was it totally made form a solid block or something that you "tweaked" to make work?

My new MC is on the way from summit!
Solid billet, machined to spec. Pushrod length difference added to clevis, watch for the part pic coming this week.

7/8" Wilwood MC...
Already got mine, Bob.
UPS dropped it off today.

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Re: Clutch Master Upgrade

Post  turbobob924 on Wed Dec 30, 2009 9:47 am

Thanks!

You are the documentation king!
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Re: Clutch Master Upgrade

Post  xschop on Fri Jan 01, 2010 1:19 pm

4130 steel is a better material for the Wilwood pushrod to 944 Clevis adapter. It is stronger than the steel piece that Porsche made. Any Al+ Alloy material will wear out quickly at the (10mm dia.) 944 Clutch pushrod pin and the sidewall strength around the 5/16-24 Wilwood pushrod could be a problem if using alloy as well....You will run into Galvanic corrosion problems
here's the bolt-on solution...
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Last edited by xschop on Wed Jan 19, 2011 9:44 am; edited 2 times in total
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Re: Clutch Master Upgrade

Post  Porch on Mon Jan 04, 2010 11:51 am

gt1scca wrote:The full spec...

(Edit in progress...)

This should be squeaky-close, without actually mocking it up on the firewall, and without
using the firewall plate. Add the thickness of the plate if reinforcing the firewall...

Test-fit may prove a slight length adjustment, but the adjustability of ~30MM should
get it PD close.
I believe you have a typo in your image. Part number is 260-10374, correct?
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Re: Clutch Master Upgrade

Post  gt1scca on Mon Jan 04, 2010 8:15 pm

Yea, yea...I'll fix it.

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Re: Clutch Master Upgrade

Post  Porch on Mon Jan 04, 2010 9:04 pm

Thanks, i was searching all over the web for the wrong part number! Embarassed Smile

Just ordered a clevis and i'm really looking forward to this mod! My trans is such a pain to shift some days, and 1st really puts up a fight unless i'm at a dead stop.
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Shimming the clutch slave

Post  Arthropraxis on Fri Jan 08, 2010 8:26 pm

"If you are using a stock GM pressure plate that has the ratchet adjustment on the finger height you can put a .110 shim behind slave and it will help with engagement."

Found a thread on measuring to see if you need a shim
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another with better pictures
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I saw this posted on another forum. Is this a reasonable option to installing a larger clutch MC? I was planning on a new wilwood MC. If this works it would be easier and cheaper to stay with a new stock MC. Thoughts?
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Re: Clutch Master Upgrade

Post  Porch on Sun Jan 10, 2010 10:07 pm

It would probably work just fine! 968ls1 said that the shims would be a good alternative with a stock clutch though...i'm running the RH upgraded clutch.
For $100 i'm just gonna go with the upgraded master....
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