anyone interested in a hydraulic clutch conversion bracket

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anyone interested in a hydraulic clutch conversion bracket

Postby monzaaddict » Wed Dec 14, 2016 7:21 pm

The bracket will allow hydraulics to be adapted to a 71-75 clutch pedal assembly. I should have something in a month or so (maybe less). Grandam75 did this conversion which is shown is his project journal and for all intents I am just copying what he did. I have all the dimensions plotted on graph paper and have verified the angle using a mockup made of mdf.

I am going to need to design a clutch pedal stop also.
The clutch pedal starter interlock safety is going need to be bypassed.
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Last edited by monzaaddict on Sun Jan 15, 2017 1:50 am, edited 2 times in total.
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Re: anyone interested in a hydraulic clutch conversion brack

Postby mahoy78spyder » Fri Dec 16, 2016 3:54 pm

I've been seriously considering converting my car to a 4-spd and this looks interesting. Won't need it for some time but you have my attention. :th:
Ken Mahoy
'78 C06 Monza Spyder
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1978 Chevrolet Monza Spyder

Re: anyone interested in a hydraulic clutch conversion brack

Postby monzaaddict » Fri Dec 30, 2016 2:24 am

a simple bolt on clutch pedal stop can be fashioned using the following parts (threads 3/8" 16):

- an adjustable furniture leveling glide
http://www.ebay.com/itm/162344220950?_t ... EBIDX%3AIT

- a threaded rubber foot
http://www.ebay.com/itm/262262785446?_t ... EBIDX%3AIT

- a jam nut
https://www.lowes.com/pd/The-Hillman-Gr ... ts/3012489

- A coupling nut
http://www.homedepot.com/p/Everbilt-3-8 ... /204337391

- 4 screws

The following parts are also needed:

- 5/16" x 1" clevis pin (I am going to weld pin to pedal)
http://www.ebay.com/itm/172064093104?_t ... EBIDX%3AIT


-Russell 641001 Clutch Hose Fitting Clutch Fitting -4AN Male
http://www.ebay.com/itm/252313385182?_t ... EBIDX%3AIT

- clutch master for an ls1 98-02 camaro
http://www.ebay.com/itm/170918203204?_t ... EBIDX%3AIT

A lt1 camaro clutch master is the same except the internal stop allows for a longer stroke and it includes the reservoir. With the adjustable pedal stop adjusted properly the lt1 master could be used.

- Heim with 3/8" 24 female thread and 5/16 bore
http://www.ebay.com/itm/310407383483?_t ... EBIDX%3AIT

- 3/8" 24 jam nut
http://www.ebay.com/itm/271595071613?_t ... EBIDX%3AIT

- rigging stud (has to be cut down to work
https://www.westmarine.com/buy/hayn--re ... d--7414030

A simpler solution to modify the clutch pushrod might be to use this repair kit
http://www.ebay.com/itm/261851765088?_t ... EBIDX%3AIT

and this spacer
http://www.ebay.com/itm/370915026348?_t ... EBIDX%3AIT

The plate causes the brake pedal to sit lower. cutting the pushrod and adding a coupling nut and two jam nuts will allow the pushrod to be extended restoring the pedal height.
3/8" 24 x 1 3/4" coupling nut
http://www.ebay.com/itm/222387321725?_t ... EBIDX%3AIT

firewall flexible grommet 1300
https://www.google.com/search?q=kennard ... 8&oe=utf-8
https://www.mcmaster.com/#63595K36

After buying this grommet. I think the hole required is too big. use a 1.25 id grommet or a piece of foam pipe insulation wrapped around master and sandwiched between bracket and firewall.

I disassembled one of the masters and found the bore has a steel liner - I had assumed it was plastic. Also the pushrod used by AP/Lockheed/Tilton are basically the same. Therefore the stock rod can be replaced with a threaded 5/16 rod made by tilton. Three lengths are available.

https://www.summitracing.com/parts/til-75-030
https://www.summitracing.com/parts/til-75-031
https://www.summitracing.com/parts/til-74-400

clutch pedal pads - verify fitment
14038638 mid 90s camaro
https://www.ebay.com/itm/Fits-GM-Pedal- ... RV&vxp=mtr
332515 pedal pad reproduction part # w-204 you can get stainless trim for this!
http://www.autometaldirect.com/chq-72-8 ... -7656.html
https://www.ebay.com/itm/292401768117?s ... 1436.l2649
dorman 207233 generic replacement (fitment verified)
https://www.ebay.com/itm/help-20733-clu ... L3&vxp=mtr

clutch fluid reservoir bracket ( may not clear windshield washer fluid bottle on pb cars) ( reservoir could likely be just mounted to firewall)
https://threepedals.com/products/clutch ... -mc-gen-2/

http://www.hawksmotorsports.com/82-92-c ... roduction/
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Last edited by monzaaddict on Sun Feb 18, 2018 4:17 pm, edited 15 times in total.
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Re: anyone interested in a hydraulic clutch conversion brack

Postby monzaaddict » Sat Jan 14, 2017 3:24 pm

I got the pedal stop worked out and will be working on the firewall bracket. No reason this won't work. Clutch master push rod stays straight throughout the full range of motion.
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Re: anyone interested in a hydraulic clutch conversion brack

Postby robson » Tue Aug 01, 2017 2:00 pm

Is there any hydraulic clutch conversion kit out there made for the Monza?
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Re: anyone interested in a hydraulic clutch conversion brack

Postby robson » Tue Aug 01, 2017 2:00 pm

Is there any hydraulic clutch conversion kit out there made for the Monza?
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Re: anyone interested in a hydraulic clutch conversion brack

Postby monzaaddict » Mon Jan 29, 2018 4:57 pm

I am back working on this hydraulic clutch conversion. I am having 10 brackets made from the template shown. I should have the brackets in 2 weeks. I disassembled a factory ls1 clutch master and found a aftermarket pushrod that allows a rod end to be threaded. This is a much better solution than modifying the stock pushrod. The pedal has to be drilled for a new clevis pin and the pin welded.
A pedal stop will be included to prevent over centering clutch and/or blowing out concentric bearing seals.
This will work with ls1/t56, lt1/t56, saginaw, muncie, etc. with the proper concentric bearing.
I haven't come up with a price yet.
ls1 and most aftermarket concentric bearings for saginaw, muncie, etc. recommend use of a 3/4 bore clutch master. Lt1 t56s use either 3/4 or 7/8 (depending upon which slave is used I assume).
The bracket will bolt onto firewall between the brake master or power booster. THERE IS NO NEED TO MOVE THE ENGINE WIRING PLUG. The brake pedal will be lower due to the thickness of the bracket so I will be including a threaded coupling and nuts to lengthen the brake pedal pushrod.
The kit will require additionally purchasing a 3an or 4 an adapter, hydraulic line of proper length to reach concentric bearing, concentric bearing, and I would recommend a remote bleeder line.
In addition an early 71-75 manual brake and clutch pedal are required. The automatic pedal bracket may be used if a manual bracket is not available (the manual pedal bracket has a pedal stop at top of travel and mount for cable wheel which are no longer necessary).
On an early Vega the brake lines may need to be rerouted.

If anyone is interested in this pm me.
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Re: anyone interested in a hydraulic clutch conversion brack

Postby monzaaddict » Sun Feb 18, 2018 6:06 pm

got first bracket from machine shop
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