Hydraulic master cylinder size for hydraulic throw out bearing for T-56 Magnum

[Joerg]

Hi I need advice for size of hydraulic master cylinder for hydraulic throw out bearing for T-56 Magnum.

Clutch-Lever will be 6:1 which master cylinder size should I use 3/4" or 7/8" or 1" or better which is the best working one ?

THX Jörg

 

[66Valiant528]

I called Wilwood because I have their pedal assy. With a 6:1 ratio they suggested a 3/4 bore for my McLeod TOB. I'd suggest you contact whomevers clutch master you use. But I'm happy with my pressure plate travel and the pedal is way softer than my A833 Roadrunner with stock linkage.

 

[goldduster318]

13/16" bore is what you want. You'll need to modify the pedal for 6:1 as I covered here:
T56 Magnum Conversion

Use a hydraulic throwout bearing for a 2002 Camaro with the 5.7 LS1 and buy one of the multi thickness spacer kits and the adapters to convert it to AN fittings and you'll be really happy

These are the 2 adapters:
https://www.summitracing.com/parts/fra-650308
https://www.summitracing.com/parts/rus-640281

I have this big spacer in there but I think i also have some smaller ones, but you could also make your own, there are a bunch available, just do the measurements
https://www.summitracing.com/parts/ram-78511

Hydraulic Throwout bearing
https://www.rockauto.com/en/moreinf...vQV/6SB4FGR5b+Yec2/gNE5MZq1pbpzamn1gAc8Qt0Zes

 

[72bluNblu]

I have a 7/8” Wilwood MC on my hydraulic clutch set up for my T56 magnum. Also running a throw out bearing for a 5.7 LS1. Works pretty good, I actually have a 3/4” MC I’m going to try out at some point to get a little bit longer friction/engagement zone on the pedal. The 7/8” works fine and the pedal effort is good but it’s a little too “on/off” for me.

 

[goldduster318]

I have a 7/8” Wilwood MC on my hydraulic clutch set up for my T56 magnum. Also running a throw out bearing for a 5.7 LS1. Works pretty good, I actually have a 3/4” MC I’m going to try out at some point to get a little bit longer friction/engagement zone on the pedal. The 7/8” works fine and the pedal effort is good but it’s a little too “on/off” for me.

I tried a 7/8 and it was way too on/off. The 13/16 is what came in the original kit I bought and it works well, though the difference between it and 3/4 is very small. Effort is not hight at all, the smaller bore will take some of that away.

Mine acts very much like an OE pedal for enagement point and otherwise feels similar to the hydraulic clutch on my 2004 Chevy Colorado (which honestly might have the identical hydraulic throwout bearing)