GSL-SE brake swap, Front & rear. How hard?
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Racing is life!
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From: Grapevine, TX
GSL-SE brake swap, Front & rear. How hard?
I know the GSL-SE (13B) has bigger brakes than the models that came with the 12A motor. Assuming I could find a donor car how hard would it be to swap the hardware?
Specific questions I have:
Is the GSL-SE a 5 lug setup?
I assume I need the entire rear differential, axle's and all, and will it bolt right on without too much drama?
Any major problems with swaping the front brake components?
Will the master cylinder work, or do I need to go with larger one?
I have searched on several race type forums and could not find a write up on anyone that has done this. I'm building a race car to run in SCCA EP. I'm not sure if this should be in the racing specific area or here. Carl move it if you think it should be.
Thanks!
Specific questions I have:
Is the GSL-SE a 5 lug setup?
I assume I need the entire rear differential, axle's and all, and will it bolt right on without too much drama?
Any major problems with swaping the front brake components?
Will the master cylinder work, or do I need to go with larger one?
I have searched on several race type forums and could not find a write up on anyone that has done this. I'm building a race car to run in SCCA EP. I'm not sure if this should be in the racing specific area or here. Carl move it if you think it should be.
Thanks!
Got Boost?
Joined: Feb 2002
Posts: 1,066
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From: Watertown, MA
The Swap isn't really that hard, though some extra difficulties/parts need to be used depending on the year of the car. Basically, if you already are using an 84-85 12A car the front brakes are really easy, you can swap just the hub/rotor an the calipers. On earlier cars you have to grab the entire strut/spindle assembly. 79-80's IIRC they have a different thread pitch on the brake lines.
You have to use the whole rear-end from the -SE regardless; the mounting braket bolt patern is different on the -SE. Grab the e-brake cables too. If its not an 84-85, then you need the -SE driveshaft as well. The same thread pitch issue exists on the 79-80 models as on the front. AFAIK the actual masters are the same internally (same piston diameter) though I've been told you need the -SE one. In any case you need the proportioning valve (though if I were racing, and the rules allowed I'd ditch it an install an adjustable one)
You have to use the whole rear-end from the -SE regardless; the mounting braket bolt patern is different on the -SE. Grab the e-brake cables too. If its not an 84-85, then you need the -SE driveshaft as well. The same thread pitch issue exists on the 79-80 models as on the front. AFAIK the actual masters are the same internally (same piston diameter) though I've been told you need the -SE one. In any case you need the proportioning valve (though if I were racing, and the rules allowed I'd ditch it an install an adjustable one)
Thread Starter
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From: Grapevine, TX
Originally Posted by fatboy7
The Swap isn't really that hard, though some extra difficulties/parts need to be used depending on the year of the car. Basically, if you already are using an 84-85 12A car the front brakes are really easy, you can swap just the hub/rotor an the calipers. On earlier cars you have to grab the entire strut/spindle assembly. 79-80's IIRC they have a different thread pitch on the brake lines.
You have to use the whole rear-end from the -SE regardless; the mounting braket bolt patern is different on the -SE. Grab the e-brake cables too. If its not an 84-85, then you need the -SE driveshaft as well. The same thread pitch issue exists on the 79-80 models as on the front. AFAIK the actual masters are the same internally (same piston diameter) though I've been told you need the -SE one. In any case you need the proportioning valve (though if I were racing, and the rules allowed I'd ditch it an install an adjustable one)
You have to use the whole rear-end from the -SE regardless; the mounting braket bolt patern is different on the -SE. Grab the e-brake cables too. If its not an 84-85, then you need the -SE driveshaft as well. The same thread pitch issue exists on the 79-80 models as on the front. AFAIK the actual masters are the same internally (same piston diameter) though I've been told you need the -SE one. In any case you need the proportioning valve (though if I were racing, and the rules allowed I'd ditch it an install an adjustable one)
I've been told the struts are the same. I guess I need the spindle assembly. Should be a fun project.
Ryan
Joined: Mar 2003
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From: Los Angeles, Ca 323/213/818/626
Originally Posted by cpa7man
Thanks, anyone else have any input. Looks like I got a 83 tub. Anyone have a GSL-SE they want to donate or sell me.
I've been told the struts are the same. I guess I need the spindle assembly. Should be a fun project.
I've been told the struts are the same. I guess I need the spindle assembly. Should be a fun project.
I got 2 see the thread https://www.rx7club.com/1st-generation-specific-1979-1985-18/%2A-se-sale-%2A-328754/
but CA
Spindles, yes have to be changed. as far as the rear end the whole thing needs to be swapped.
-Ryan
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From: Grapevine, TX
Originally Posted by 1984se
I got 2 see the thread https://www.rx7club.com/showthread.php?t=328754
but CA
Spindles, yes have to be changed. as far as the rear end the whole thing needs to be swapped.
-Ryan
but CA
Spindles, yes have to be changed. as far as the rear end the whole thing needs to be swapped.
-Ryan
Joined: Dec 1999
Posts: 7,855
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From: Behind a workbench, repairing FC Electronics.
Originally Posted by cpa7man
Is the GSL-SE a 5 lug setup?
GSL-SE is 4 lug, 4.5 inch (114.3mm) spacing...
12A cars are also 4 lug, but 110mm oddball spacing.
Burning Oil-Grinding 3rd
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From: Union Mills NC
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