T56 clutch M/C and mounting bracket? - Chevelle Tech
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  #1  
Old Mar 23rd, 11, 12:31 PM
Derek69SS Derek69SS is offline
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Default T56 clutch M/C and mounting bracket?

My LS1/T56 didn't come with a master cylinder for the clutch, so I'm starting from scratch here, and don't really know where to start. This stuff's all new to me. Something in kit-form would be nice, but I don't want to spend a lot either.

I'm not afraid to modify my firewall for mounting a M/C if it will save me money and/or look cleaner when done. What bore size M/C should I use? (planning to use stock '69 pedal assembly, but willing to modify pedal motion ratios if necessary)

Any suggestions?
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  #2  
Old Mar 23rd, 11, 1:31 PM
Scotch Scotch is offline
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Default Re: T56 clutch M/C and mounting bracket?

Wanna come look at mine?

You can buy or fab a plate to mount the stock LT1 stuff and get it to line up with your new 69 clutch pedal. That should work if the LT1 and LS1 clutch masters are similar, and since they're both T56s, I'd bet they are.
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  #3  
Old Mar 23rd, 11, 2:29 PM
Steve1972 Steve1972 is offline
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Default Re: T56 clutch M/C and mounting bracket?

I've seen a few on LS1 tech that use the stock f-body master set-up. I'll see if I can find them again.

Here's a couple of builds that use an S&P plate that mounts behind the brake booster, they give dimensions for the plate if you want to fab it yourself.

http://www.hotrodlane.cc/Streetstori...ls1camaro1.htm

http://www.hotrodlane.cc/PDFFILES/LS...toryscreen.pdf
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  #4  
Old Mar 23rd, 11, 5:05 PM
novaderrik novaderrik is online now
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Default Re: T56 clutch M/C and mounting bracket?

didn't ATS make a kit just for this that uses a Camaro master cylinder and throwout bearing, with a mounting bracket and instructions on how to modify your pedal?
or was that just for Camaros?
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  #5  
Old Mar 23rd, 11, 6:58 PM
Bad66Chevelle454 Bad66Chevelle454 is offline
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Default Re: T56 clutch M/C and mounting bracket?

I'd highly suggest to use the stock Chevy set up. That's what I did. Works perfect and you can get parts for it if you're stuck on some road trip. Part number: 12570277. It's cheaper to buy it and ship it from gmpartsdirect than from your local dealer. Comes complete with the master, braided line and reservoir.

For mounting, I used that typical mount, thats kinda like a piece of metal bent on an angle. You can get them from just about anywhere, I got mine from DSE I believe. It puts that master cylinder at the correct angle to match up with your pedal.

Feel free to ask me any questions, I went through all this not too long ago on my car. There's probably even pictures of it in my build thread.
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  #6  
Old Mar 23rd, 11, 11:11 PM
cuisinartvette cuisinartvette is offline
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Default Re: T56 clutch M/C and mounting bracket?

Buy the premade bracket, its kind of a complex angle and geometry/throw has to be right or youll blow your slaves out.
had to make mine and figure it out yrs before all these kits came out.

Yoll love the conversion, to date best mod Ive done totally transformed the car.
You can build the motor to be a beast and still cruise the fwy
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  #7  
Old Mar 24th, 11, 4:19 AM
usc2001gc usc2001gc is offline
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Default Re: T56 clutch M/C and mounting bracket?

If you're going with the stock setup, here's a bracket for $30.00 http://cgi.ebay.com/ebaymotors/LS1-T...item3f07e2538a
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  #8  
Old Mar 26th, 11, 12:45 PM
andrewb70 andrewb70 is offline
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Default Re: T56 clutch M/C and mounting bracket?

Quote:
Originally Posted by usc2001gc View Post
I don't think that those brackets work well on A-bodies. They were originally designed for 1st gen F-bodies. I recall having a chat with Tyler at ATS and he mentioned some issues when the bracket is used on A-bodies.

I ended up going with the Keisler kit which I am very happy with. The angle was perfect and there are various, inexpensive MCs that are available. I started with the .750" bore MC, but switched to a .700" bore MC to reduce the travel of the TOB. Each setup will be unique of course.

Andrew
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  #9  
Old Mar 26th, 11, 5:00 PM
BigDawg BigDawg is offline
 
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Default Re: T56 clutch M/C and mounting bracket?

Quote:
Originally Posted by andrewb70 View Post
I don't think that those brackets work well on A-bodies. They were originally designed for 1st gen F-bodies. I recall having a chat with Tyler at ATS and he mentioned some issues when the bracket is used on A-bodies.

I ended up going with the Keisler kit which I am very happy with. The angle was perfect and there are various, inexpensive MCs that are available. I started with the .750" bore MC, but switched to a .700" bore MC to reduce the travel of the TOB. Each setup will be unique of course.

Andrew
Andrew, I agree with your statement as this bracket does not work well with A body cars. I just purchased this item from the same ebay seller and 1. the mounting holes do not line up and the angle for the mc is not correct. My original thoughts were to simply enlarge the holes, but I think I will just return it and purchase one from ATS or Tick Performance.
Here's a couple of photos of my test fit.
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  #10  
Old Mar 26th, 11, 6:19 PM
cheveslakr cheveslakr is offline
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Default Re: T56 clutch M/C and mounting bracket?

I don't know about the above pictured bracket but I fabricated my own following a blueprint I posted on another recent thread and it worked out perfect, no issues, on an a-body.


Jerry
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  #11  
Old Mar 27th, 11, 11:09 AM
Derek69SS Derek69SS is offline
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Default Re: T56 clutch M/C and mounting bracket?

Thanks for all the tips guys!

I'm going to try making my own bracket... probably something welded to the firewall, since everything needs to be repainted anyway. I'll use the GM master cylinder, reservoir, and hoses.
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  #12  
Old Mar 28th, 11, 1:53 AM
tom_a tom_a is offline
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Default Re: T56 clutch M/C and mounting bracket?

I used one from Hurst Driveline


Here is a pic installed on a 1970 Chevelle.

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  #13  
Old Mar 28th, 11, 11:30 AM
Bad66Chevelle454 Bad66Chevelle454 is offline
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Default Re: T56 clutch M/C and mounting bracket?

I used that same Ebay bracket and it worked perfectly on my car. Yes, the mounting holes were very tight, but it did go on. After that I just welded a tab onto my clutch pedal, bolted the master to that and I was done.

I just got done installed a 5 speed from Hurst Driveline using the same set-up as pictured above and I didn't like it as much. You have to use the remote reservoir, which doesn't cleanly mount anywhere and how the master mounts with the pedal isn't as nice. With their bracket I couldn't get the angle right to allow the right amount of throw(full throw on pedal but only 1" throw on master). I wasn't impressed with their set up. Truthfully, I'm not impressed with that company, but that's just my personal experience.
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  #14  
Old Mar 28th, 11, 12:55 PM
Derek69SS Derek69SS is offline
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Default Re: T56 clutch M/C and mounting bracket?

Well now I'm as confused as when I started...

What, if done incorrectly, will cause the slave to blow out? Is it from over-extending the master cylinder? Can't that be adjusted in the linkage to the pedal?

What are you guys using to seal off the firewall? That was one of the reasons I was thinking of making my own bracket, I could just make the firewall come out to the M/C if needed.
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  #15  
Old Mar 28th, 11, 6:07 PM
tom_a tom_a is offline
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Default Re: T56 clutch M/C and mounting bracket?

Derek,

I can't say that I fully understand it either but I believe that your pedal travel can exceed your master thus causing premature failure. I was told you really should want to use the floorboard as your stop instead of a bolt. I really have no idea if mine is correct however the fact that I have actuated several times in the limited drive time and it works. There is some adjustment in the rod I have just as it would be on an aftermarket brake m/c. I noticed Tim (above) mentioned something about only getting 1" of travel so his set up must differ from mine as the Ram TOB I am using only has .700" from start to finish for travel. The spacing for bell housing face to pressure plate fingers need to be measured really good. I had pull the trans to add a shim and flat backing a trans is no fun.

As for sealing the firewall I have not done anything yet. However I am using some one sided sticky joint sealant like below picture arorund the open area of my roll cage bar and floor pan




Quote:
Originally Posted by Bad66Chevelle454 View Post
You have to use the remote reservoir, which doesn't cleanly mount anywhere and how the master mounts with the pedal isn't as nice. With their bracket I couldn't get the angle right to allow the right amount of throw(full throw on pedal but only 1" throw on master). I wasn't impressed with their set up. Truthfully, I'm not impressed with that company, but that's just my personal experience.
I thought most were remote mount reservoir? I understand opinons vary but I thought the bracket from Hurst worked and went on good for me
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