94 GT Cobra brake upgrade about to start... Questions...

BlackStallion

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Been a while since I've been here, but I'm finally about to start converting my 94 GT to Cobra brakes (all 4 corners), I've lurked around the internet and discovered that I appear to have the "smooth bottom" newer Cobra calipers. I have not yet measured the pistons to confirm, but I suspect they're the 40mm units.

That being said, I can't seem to find any definitive answer on if I need to swap my master cylinder to a different style so my brakes don't feel like crap when using them. Seems most threads on most forums the OP has a 96-up car. Can anyone confirm?

Anything else to look out for?

I have the rear brackets/anti-moan brackets, hawk pads, stoptech slotted rotors, all caliper bushing/pin kits for all calipers (will be ordering new caliper piston boots/seals today), Russell stainless braided hoses for 94 Cobra, which include aluminum crush rings, all banjo bolts to match calipers.

Thanks in advance!

(edit: if this needs moved to the brake tech section, my apologies)
 
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BackinBlack

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I did this about ten years ago on my '94 and I replaced my master cylinder with a Cobra unit. My rear brakes are still stock GT. I don't think you have to do it but it should make your pedal "feel" better.
 

Flade

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I’m running Cobra breaks up front, stock GT in back. I have the rear Cobra brakes ready to go on. Using the stock MC it feels fine. When I need a new MC I plan to switch to a Cobra MC.
 

TrickVert

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You're doing almost exactly what I did on my '95 in 2008. I kept the stock MC at the time. The pedal with the stock one was firmer than with the OEM brakes, but still very manageable. Just a couple years ago, I upgraded to a '93 Cobra MC (the brake line ports on the 94/95 Cobra unit are reversed), and it brought the braking feel back to just about stock. Worth the change, in my opinion, but not absolutely necessary.
 

waynenorcross

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Been a while since I've been here, but I'm finally about to start converting my 94 GT to Cobra brakes (all 4 corners), I've lurked around the internet and discovered that I appear to have the "smooth bottom" newer Cobra calipers. I have not yet measured the pistons to confirm, but I suspect they're the 40mm units.

That being said, I can't seem to find any definitive answer on if I need to swap my master cylinder to a different style so my brakes don't feel like crap when using them. Seems most threads on most forums the OP has a 96-up car. Can anyone confirm?

Anything else to look out for?

I have the rear brackets/anti-moan brackets, hawk pads, stoptech slotted rotors, all caliper bushing/pin kits for all calipers (will be ordering new caliper piston boots/seals today), Russell stainless braided hoses for 94 Cobra, which include aluminum crush rings, all banjo bolts to match calipers.

Thanks in advance!

(edit: if this needs moved to the brake tech section, my apologies)
The '94/95 Cobra also had a unique master cylinder with a 1" piston bore to better match with the bigger caliper bores. You may want to try to find one. I have one somewhere. I used DiskbrakesRUs.com for stuff for my '94 Cobra and 1968 Mercury Comet that I was going to do a brake upgrade on.
 

waynenorcross

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Been a while since I've been here, but I'm finally about to start converting my 94 GT to Cobra brakes (all 4 corners), I've lurked around the internet and discovered that I appear to have the "smooth bottom" newer Cobra calipers. I have not yet measured the pistons to confirm, but I suspect they're the 40mm units.

That being said, I can't seem to find any definitive answer on if I need to swap my master cylinder to a different style so my brakes don't feel like crap when using them. Seems most threads on most forums the OP has a 96-up car. Can anyone confirm?

Anything else to look out for?

I have the rear brackets/anti-moan brackets, hawk pads, stoptech slotted rotors, all caliper bushing/pin kits for all calipers (will be ordering new caliper piston boots/seals today), Russell stainless braided hoses for 94 Cobra, which include aluminum crush rings, all banjo bolts to match calipers.

Thanks in advance!

(edit: if this needs moved to the brake tech section, my apologies)
One more thing. Some racing bodies don't allow slotted/drilled rotors because if a history of cracking under severe use. Slotted only may be fine.
 

joemomma

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Following as I'm interested in this upgrade for my '94. Do you happen to have a complete (or mostly complete) parts list?
 

TrickVert

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The '94/95 Cobra also had a unique master cylinder with a 1" piston bore to better match with the bigger caliper bores. You may want to try to find one. I have one somewhere. I used DiskbrakesRUs.com for stuff for my '94 Cobra and 1968 Mercury Comet that I was going to do a brake upgrade on.
The 94/95 Cobra master cylinder's line ports are reversed from those on the GT, so unless one wants to custom-bend new lines or come up with some sort of extension hoses, it will not fit up properly. Hence my recommendation on the '93 Cobra MC.

EDIT: By the way, the 94/95 GT cylinder bore is 1-1/16", the' 93 Cobra MC is 1", and the 94/95 Cobra is 15/16".
 
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BlackStallion

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Following as I'm interested in this upgrade for my '94. Do you happen to have a complete (or mostly complete) parts list?

I will... soon-ish. I'm also trying to film the swap for my recently started YouTube channel. Which I'll show part numbers and whatnot.
 

BlackStallion

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The '94/95 Cobra also had a unique master cylinder with a 1" piston bore to better match with the bigger caliper bores. You may want to try to find one. I have one somewhere. I used DiskbrakesRUs.com for stuff for my '94 Cobra and 1968 Mercury Comet that I was going to do a brake upgrade on.

Good to know. Yes I think I'd like to eventually try to source one. Maximum Motorsports sells the conversion lines so wouldn't be a big deal. Just finding a good master cylinder is all.
 

TrickVert

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Good to know. Yes I think I'd like to eventually try to source one. Maximum Motorsports sells the conversion lines so wouldn't be a big deal. Just finding a good master cylinder is all.
I didn't know there was a pre-fab solution for this. Back in '08 when I first did it maybe there wasn't (?). I never thought to look into it again. No matter, though, the '93 master is working well for me.
 
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waynenorcross

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Good to know. Yes I think I'd like to eventually try to source one. Maximum Motorsports sells the conversion lines so wouldn't be a big deal. Just finding a good master cylinder is all.
Try Jim at Performanepartsinc.com. he has lots of rare stuff not showing on his website. Tell him Wayne said hello.
 

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