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Author Topic: Searching for manual master cylinder  (Read 104 times)

Offline Joel87a

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Searching for manual master cylinder
« on: May 29, 2020, 03:02:09 am »
Iam wanting to convert to a manual master cylinder and remove my booster. I see the ae86 guys have a kit for it but i have yet to find one for the ra64. Does anyone know a.vross refence between any other vehicle to do this?

Also id like to find a way to either relocate or chamge the tension rods underneath the car so i can front half the celica to lose more weight. Obviously i cant just remove the tc rods all together but did knpw if anyone has done somthing to either relocate or had a different solution.

Offline Teranfirbt

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Re: Searching for manual master cylinder
« Reply #1 on: May 29, 2020, 06:05:15 pm »
What are you doing with your car that makes a manual master necessary? There are a lot of considerations that need to go into that mod.

Moving the tension rods to face toward the rear of the car is possible, with some careful fab work to make them integrate into the frame rails. I don't know of anyone who has done it.
1983 Celica GT-S 2RZ swap: Deered 2014 :(
1986 Tercel 4WD 4AFE Swap: Going strong
1986 MR2: What a beast!
2014 Elantra GT: The reliable one

"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." ~ Albert Einstein

Offline Joel87a

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Re: Searching for manual master cylinder
« Reply #2 on: May 30, 2020, 02:54:14 am »
Drag race is the goal,i have dual carbs and i dont want to run 4 hoses to a junction to the brake booster, the reduction of weoght would be nice as well as cleaning up the engine bay

The tensiom rod thing is if i front halved the car the tc rods would severely limit how much could be remove to reduce weight

Offline ozzie

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Re: Searching for manual master cylinder
« Reply #3 on: May 30, 2020, 06:51:46 am »
Teranfirbt, wouldn't changing the TCRs from tension to compression require reinforcement/re-engineering to keep them from bending?
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Offline sirdan

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Re: Searching for manual master cylinder
« Reply #4 on: May 30, 2020, 10:25:03 am »
Getting the right bore size master is going to be the key to having a good working system. Apples to oranges here but I went from power to manual brakes on my dart and the pedal was no where near as stiff as I expected. 100% streetable and safe. I would find out what size the ae86 manual master and calipers are and figure out what ratio of fluid it is moving and get something similar to that.

I think your wasting time on the tension control rods they don't weigh much and would be hard to get rid of.
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Offline Joel87a

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Re: Searching for manual master cylinder
« Reply #5 on: May 30, 2020, 11:58:06 am »
Awesome guys,thank you for your input.ill do research on the master cylinder

Offline Joel87a

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Offline ozzie

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Re: Searching for manual master cylinder
« Reply #7 on: May 31, 2020, 04:06:02 am »
If you're any good at fabricating, could you make custom A arms?
'84 Celica GT - 261k mi

Offline Joel87a

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Re: Searching for manual master cylinder
« Reply #8 on: May 31, 2020, 02:56:19 pm »
Possibly. My other thought would be to do the tubular front emd with a welded tab for the tc control rod. My goal isnt to eliminate the tc rod my goal is to chop from the shock tower to the front including upper fender frame and lower frame. The engine subframe sits well out of the way of this

Offline Teranfirbt

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Re: Searching for manual master cylinder
« Reply #9 on: Jun 01, 2020, 01:38:37 am »
Teranfirbt, wouldn't changing the TCRs from tension to compression require reinforcement/re-engineering to keep them from bending?
True, there are concerns with buckling under hard braking in that case, although if you look at an MR2 the rear tension rods are in compression during acceleration and don't have any issues.

On the brake booster, you only need to run 1 hose from any of the cylinders, although there will be a short lag from when you get off the throttle to when you'll have full brakes. In any case, you'll want a slightly smaller bore master to make up the difference in pressure from the booster. It may take a fair bit of pedal travel to get solid brakes since it can't move as much fluid.
1983 Celica GT-S 2RZ swap: Deered 2014 :(
1986 Tercel 4WD 4AFE Swap: Going strong
1986 MR2: What a beast!
2014 Elantra GT: The reliable one

"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." ~ Albert Einstein