Fox T-Bird/Cougar Forums

Technical => Suspension/Steering => Topic started by: Soul on July 10, 2013, 09:41:00 AM

Title: Lincoln MC and Mustang Booster who is running?
Post by: Soul on July 10, 2013, 09:41:00 AM
About to do this swap and getting hit and miss info about it being spongy. Trying to decide if I want to just get a different MC.

Also will I need to gut my stock prop and get aftermarket with this setup. I know this topic has been beaten to death as I read a ton of threads on this site about it but wanting a clear cut answer before I pull the trigger. I appreciate any and all input and maybe if we get a clear answer we can make a sticky?
Title: Lincoln MC and Mustang Booster who is running?
Post by: Aerocoupe on July 10, 2013, 03:59:34 PM
In order to determine if the Lincoln MC and Fox Mustang booster are what you need can you post up what brakes you will be running?  Also, is the Lincoln MC you are planning to use the one for an '85 Lincoln Towncar?

Darren
Title: Lincoln MC and Mustang Booster who is running?
Post by: Soul on July 11, 2013, 09:09:42 AM
Yes to town car, and TC brakes for now. Doubt I'll upgrade in the next few years. Suspension is next big upgrade and I'll see if the TC brakes stop me. As for now they are more than sufficient.
Title: Lincoln MC and Mustang Booster who is running?
Post by: Soul on July 11, 2013, 09:11:48 AM
PS thank you for the reply. Think the newest thread I saw on this was for Driverguy and the thread had alot of info but I was looking for a clear cut yes this works. I got went ahead and pulled the trigger on the MC. I got it for about 13 off of rock auto so I'll post up my results after I do the swap. Till then if others want to chime in I appreciate the feedback.
Title: Lincoln MC and Mustang Booster who is running?
Post by: ipsd on July 11, 2013, 12:18:37 PM
Well I'm one for Yes it works. I will tell you to have the place you get it form order in Many of them. Then look them all over, if your lucky you'll find a aluminum unit. I'm currently running the lincoln MC on my factory 84 T/c booster. With the factory brakes all around. Much improvement over the stock T/c unit. Brakes are much better Way less mussy. I do plan on upgrading to the lincoln mark/Svo rotors when cash flow allows . I've got the spindles for it in the shop.

Hope that helps
Stuckman
Title: Lincoln MC and Mustang Booster who is running?
Post by: Soul on July 11, 2013, 01:16:28 PM
I pulled the trigger figuring it was cheap enough. I think the one I ordered is cast but I may look for an alum one. From what I gather it should mount to my current lines at the mc with no adapters, but we'll see.
Title: Lincoln MC and Mustang Booster who is running?
Post by: Aerocoupe on July 11, 2013, 07:42:57 PM
With you running the stock brakes this will be a good combo with the stock Fox Mustang booster.  I believe the stock MC on our cars has a 21mm bore which is about 13/16".  When compared to the Towncar MC it will produce higher pressures but not move as much fluid.  The Towncar MC will work a lot better with rear disc brake cars due to the added volume of fluid it moves I think the pedal effort will be less.

Darren
Title: Lincoln MC and Mustang Booster who is running?
Post by: TOM Renzo on July 11, 2013, 10:10:18 PM
Xxx
Title: Lincoln MC and Mustang Booster who is running?
Post by: Soul on July 12, 2013, 10:11:16 AM
I picked the 93 cobra booster, was what alot of people suggested prior to this thread. I Lincoln MC is 1" bore which with the booster should give me firm pedal. As for fittings and plumbing ya it doesn't matter and is easy, but I was hoping for bolt in affair to tidy up the engine bay, and I hate running line. Trying to find what fits my goals / ideas first and if that doesn't work I'll move on to more work.

Thanks for the info guys.
Title: Lincoln MC and Mustang Booster who is running?
Post by: TOM Renzo on July 12, 2013, 06:33:54 PM
Xxx
Title: Lincoln MC and Mustang Booster who is running?
Post by: Aerocoupe on July 12, 2013, 09:32:27 PM
Tom,

I am pretty sure the pedal ratio on the Birds is the same as the Fox Mustangs if I remember correctly. There are several guys here in Houston running a 1" bore MC on Mustangs with 11" brakes up front and the TC style discs in the rear.  The pedal effort according to them is really nice and the cars stop better than stock. The one thing is that they are running a good pad as well so that also needs to be factored in.

Where I screwed up on my Bird back when I had the 11" front brakes and the SVO calipers with the Stainless Steel Corp rear disc conversion was running the SVO MC. I should have run the 85 Towncar MC as the pedal effort with the SVO MC was horrible.

Darren

Darren
Title: Lincoln MC and Mustang Booster who is running?
Post by: TOM Renzo on July 13, 2013, 12:08:23 AM
Xxx
Title: Lincoln MC and Mustang Booster who is running?
Post by: Aerocoupe on July 13, 2013, 09:31:58 AM
The pedal ratio on the Fox Mustangs is 3.4:1 for power assisted and 6.1: for manual.  I would be curious to know what the ratio is on the TC's if they are different.  The ratio is the distance of the pivot point of the brake pedal to the center of the brake pedal to the distance of the pivot point of the brake pedal to the attachment point of the brake rod.  If anyone with a TC could measure that it would just be a cool thing to know.  I have attached a diagram that shows the measurements I am talking about and ours would be the left side.

X

Darren
Title: Lincoln MC and Mustang Booster who is running?
Post by: QUICKSHIFT on July 13, 2013, 10:54:18 AM
I am running a 84 towncar MC, 88 MUSTANG LX booster and the 11" rotors. I upgraded to 73mm calipers and used the prportioning valve from the towncar and used HPS pads. I still have the 9" rear drums.  For me, it's a perfect combo and works extremely well.
Title: Lincoln MC and Mustang Booster who is running?
Post by: TOM Renzo on July 13, 2013, 05:16:22 PM
Xxx
Title: Lincoln MC and Mustang Booster who is running?
Post by: TOM Renzo on July 13, 2013, 05:37:55 PM
Xxx
Title: Lincoln MC and Mustang Booster who is running?
Post by: Aerocoupe on July 13, 2013, 06:20:58 PM
I'm disagreeing with you on this on Tom.  I measured the brake pedal on my 93 Fox Coupe and calculated a 3.4:1 ratio.  This is also the same ratio that Jack Hidley (Maximum Motorsports) has posted on several sites when discussing brakes on these cars as well as how to modify the pedal for manual brakes.

If your calculations on the TC pedal are correct then just about any combination on a Fox Mustang that has power brakes should have the same results on a Thunderbird with a Fox Mustang pedal assembly.  I used a Fox Mustang pedal assembly on my 83 T-Bird with zero issues.

Darren
Title: Lincoln MC and Mustang Booster who is running?
Post by: Haystack on July 13, 2013, 08:30:03 PM
my fox mustang brake/clutch pedal was identical to my 87 bird one when I did the t-5swap. I saw no difference in mounting or length
Title: Lincoln MC and Mustang Booster who is running?
Post by: TOM Renzo on July 13, 2013, 11:49:42 PM
Xxx
Title: Lincoln MC and Mustang Booster who is running?
Post by: Haystack on July 14, 2013, 01:10:51 AM
I just measured my stock aod pedal assembly, it was about 14" over all, 10" from nub to center of brake pedal. interestingly, this would give me about a 2.5/1 ratio, which doesn't make any sense to me.
Title: Lincoln MC and Mustang Booster who is running?
Post by: Aerocoupe on July 14, 2013, 09:23:24 AM
Haystack,

No, that gives you a 3.5:1 ratio.  You need to measure from the center line of the pivot point of the break pedal to the center of the break pedal pad (X).  Then you need to measure from the center line of the pivot point to the center line of the brake rod attachment point on the break pedal (Y).  Divide X/Y = Brake Pedal Ratio.  In your case you are saying that X=14" and to find Y you need to subtract 10" from 14" to get 4".  This gives you 14/4 = 3.5.

Darren
Title: Lincoln MC and Mustang Booster who is running?
Post by: Aerocoupe on July 14, 2013, 09:31:08 AM
Tom,

From your pictures both brake pedal lengths are 13".  On the left you have a 9-1/2" measurement from the center of the break pedal pad to the center of the brake rod attachment point and a 3-1/2" measurement from the center of the brake rod attachment to the center line of the pivot point of the break pedal arm.  This is an overall length of 13" on the one the left.  The one on the right is 9" & 4" which is an overall length of 13".  The one on the left has a ratio of 3.7 and the one on the right has a ratio of 3.25.  This is all based on the picture you provided which I am doing quite a bit of assuming on the measurements as the pictures are not quite straight on and I cannot see where the end of the tape is on the break pedal arm pivot point.  I was pretty sure you would have taken that measurement from the center line but I cannot tell.  Also, if you would post the Ford part number stamped in the arm it would help as well.

Darren
Title: Lincoln MC and Mustang Booster who is running?
Post by: Soul on July 15, 2013, 09:27:37 AM
Well GOOD MORNING guys, I didn't follow this over the weekend but appears there was some back and forth. I only see one side of it now but I appreciate the replies. From what I follow from Aero's posts there was some debate over pedal effort. Parts should be in this week, but I"m pulling the motor to weld up the engine bay but will post results soon as its back on the road.