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What size master cylinder do I need?

Old 06-01-2015, 05:52 PM
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Default What size master cylinder do I need?

I bought a Monster Clutch kit with a GTO slave cylinder. My old hydraulic clutch had a 1-1/8" bore diameter Wilwood master cylinder. Anybody have an idea what size is needed for the new slave cylinder or what size the factory used?
Old 06-09-2015, 09:11 AM
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Originally Posted by joyridin'
I bought a Monster Clutch kit with a GTO slave cylinder. My old hydraulic clutch had a 1-1/8" bore diameter Wilwood master cylinder. Anybody have an idea what size is needed for the new slave cylinder or what size the factory used?
What vehicle is this going in? What sort of travel do you have at the MC? If you have a little more than 1" travel at the MC a 3/4" bore MC will do the trick.

Andrew
Old 06-09-2015, 05:04 PM
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I have at least 1" of travel. I called Monster Clutch and they told me my existing 1-1/8" master cylinder would work. I thought I recall reading the factory used about a .875" bore, which would mean I am pumping one heck of a lot more fluid through than originally designed for.

The original slave cylinder was an external version off a Dodge truck and it had about a 1" or larger bore diameter.
Old 06-09-2015, 11:04 PM
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So is this a LS swap into a Dodge truck?

Andrew
Old 06-10-2015, 08:24 PM
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No. LS3 into a Cobra. It just used a slave from a Dodge truck...or so That was the best I could cross.


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