Hydraulic clutch for a 915 Wevo(Fixed it w/o $$$) |
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Hydraulic clutch for a 915 Wevo(Fixed it w/o $$$) |
dekman |
Dec 16 2007, 12:57 PM
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#1
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Member Group: Members Posts: 458 Joined: 12-December 04 From: Ojai,CA Member No.: 3,274 Region Association: None |
Has anyone converted to this from the cable/pulley system. Need to upgrade. Any help would be appreciated! Photo's too if you've got 'em.............
(someone said they heard of it being done with a 933 master cylinder and a Wilwood slave?) (IMG:style_emoticons/default/pray.gif) |
Dave_Darling |
Dec 16 2007, 07:21 PM
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#2
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
964 pedals have the necessary hydro clutch master. Wevo makes an annular TO bearing for the 901, and probably for the 915 as well. That'd be the simplest thing. You can also go with Tilton pedals and MCs, but that will require even more fabrication I think.
There are a number of ways you can work out the slave cylinder issues, but they all require fabrication. Flex is a real issue in many cases; there was a guy on the Bird's racing board a while back who wound up doing a lot of reinforcement to his slave cylinder mounting. --DD |
woobn8r |
Dec 16 2007, 09:35 PM
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#3
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Senior Member Group: Members Posts: 607 Joined: 7-January 07 From: Newmarket, Ontario, Canada Member No.: 7,435 Region Association: None |
I think Rich Johnston has a set up...
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PRS914-6 |
Dec 16 2007, 09:41 PM
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#4
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Excellence Magazine Project 914 3.6 Group: Retired Members Posts: 1,278 Joined: 20-May 06 From: Central California Member No.: 6,031 Region Association: None |
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Larry.Hubby |
Dec 16 2007, 09:44 PM
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#5
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Member who doesn't post much, but has a long time in 914s Group: Members Posts: 186 Joined: 24-November 04 From: Palo Alto, CA Member No.: 3,172 Region Association: Northern California |
You should have a look at this thread: http://www.914world.com/bbs2/index.php?sho...ydraulic+clutch
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wbergtho |
Dec 17 2007, 11:54 AM
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#6
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Senior Member Group: Members Posts: 1,314 Joined: 28-April 03 From: Roberts, WI Member No.: 623 |
QUOTE Wevo makes an annular TO bearing for the 901, and probably for the 915 as well. It is true...just buy the Wevo TO bearing and be done. What a nice set up! |
dekman |
Mar 10 2008, 12:13 AM
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#7
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Member Group: Members Posts: 458 Joined: 12-December 04 From: Ojai,CA Member No.: 3,274 Region Association: None |
Fixed it without an expensive hydraulic clutch fabrication! Solution = remove the flex! First.....make a support bracket for the clutch pulley, and then 2) Make a clutch cable reinforcement plate for the firewall. Now, it feels tight and precise, without any flex or slop. Will try to add pic's!
(IMG:http://i142.photobucket.com/albums/r115/dekman22/914clutchreinforcement-Jack010.jpg) (IMG:http://i142.photobucket.com/albums/r115/dekman22/914clutchreinforcement-Jack011.jpg) |
purple |
Mar 10 2008, 04:40 PM
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#8
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Pigeon feeders attract me Group: Members Posts: 938 Joined: 24-July 07 From: Houston, TX Member No.: 7,942 Region Association: None |
where did you get that pulley? I want one!
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dekman |
Mar 10 2008, 10:33 PM
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#9
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Member Group: Members Posts: 458 Joined: 12-December 04 From: Ojai,CA Member No.: 3,274 Region Association: None |
From Patrick Motorsports.....He sells the pulley which should be enough for a standard clutch. I have a HD clutch which was causing flex at the pulley and at the firewall...hence the modifications. Good Luck (IMG:style_emoticons/default/biggrin.gif)
[url=http://www.patrickmotorsports.com/] |
John |
Mar 10 2008, 10:56 PM
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#10
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member? what's a member? Group: Members Posts: 3,393 Joined: 30-January 04 From: Evansville, IN (SIRPCA) Member No.: 1,615 Region Association: None |
I never had an issue of mine flexing. I cut mine from a 3x3x3/8" angle iron.
Attached thumbnail(s) |
PRS914-6 |
Mar 10 2008, 11:32 PM
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#11
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Excellence Magazine Project 914 3.6 Group: Retired Members Posts: 1,278 Joined: 20-May 06 From: Central California Member No.: 6,031 Region Association: None |
Nice looking fab work!
I found that in my case with a heavy duty clutch the 914/6 cable is just too small in diameter to give smooth modulation. It worked perfectly fine but it just wasn't as smooth as I would like with small movement. The 911/915 cable is huge in comparison. I installed a hydraulic clutch using CNC stuff for about 150.00. A new cable and a Patrick pulley is $100.00 so not a big difference in price. Fabrication is a few hours longer. I think for the light weight pressure plates the cable is adequate. When going to a heavy duty 915 setup you might find the cable works fine but the hydraulic setup (while requiring about the same pedal pressure) is significantly smoother than the cable and more pleasurable to drive on the street. Just my opinion though. |
John |
Mar 11 2008, 10:52 AM
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#12
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member? what's a member? Group: Members Posts: 3,393 Joined: 30-January 04 From: Evansville, IN (SIRPCA) Member No.: 1,615 Region Association: None |
I think for the light weight pressure plates the cable is adequate. When going to a heavy duty 915 setup you might find the cable works fine but the hydraulic setup (while requiring about the same pedal pressure) is significantly smoother than the cable and more pleasurable to drive on the street. Just my opinion though. Mine operates smoothly with the 914/4 cable. Not sure what you mean. We are using a heavy duty pressure plate and haven't noticed anything unusual. It drives much like a stock clutch (just a little more pedal pressure). Of course, this is not a street car either so I don't have any street miles on it and don't know how it would feel in traffic, but it's fine when driving through the paddock. |
PRS914-6 |
Mar 11 2008, 06:32 PM
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#13
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Excellence Magazine Project 914 3.6 Group: Retired Members Posts: 1,278 Joined: 20-May 06 From: Central California Member No.: 6,031 Region Association: None |
John, mine worked fine too with a cable. It just lacked the smoothness needed for my clutch. My disk is a special Kennedy unit I had made with a marcell (sp?)spring only on the PP side and none on the flywheel side. This makes for a very quick disengagement since the disk does not need to slide on the tranny splines to move away from the flyweel. I feel this is one of the main reasons my tranny shifts so well.
In my case the disk also makes for a rapid engagement since it does not have to compress the marcell spring. Not like a race disk but faster than a stock disk. Small movements made a huge difference during engagement. The hydraulic system makes it all smooth as silk. Disk picture: Mine on the right and stock on the left |
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