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post #1 of (permalink) Old 05-13-2002, 01:06 PM
psf4x4
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master cylinder swap

i just got a firebird mastercylinder and plan on putting it in i've heard that you need to cut the push rod. any help would be appreciated.
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post #2 of (permalink) Old 05-14-2002, 01:32 AM
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Re: master cylinder swap

This is the MC I used with my D44 setup. Didn't have to cut anything to make it fit though. I'd bolt it on first and see how it runs. Should do just fine for you. I had to file the 2 mounting holes open a bit more, but that was very minor and only took a few minutes.

post #3 of (permalink) Old 05-14-2002, 09:31 AM
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Re: master cylinder swap

thanks glen. i cleared the bolt holes and bolted it down and it felt good. i just wasn't sure if it would over stroke and mess something up. thanks for your help again. chris goldman
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post #4 of (permalink) Old 05-14-2002, 09:35 AM
 
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Re: master cylinder swap

WHAT YEAR AND ALL INFO AND PICS PLEASE
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post #5 of (permalink) Old 05-14-2002, 07:30 PM
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Re: master cylinder swap

YEP, need more info,thanks RR
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post #6 of (permalink) Old 05-15-2002, 09:01 AM
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Re: master cylinder swap


This is a swap I originally did on my Samurai. The MC is off a 71 Firebird. There are two different ones available for that year. Get the one with the 1 1/8" bore, NOT the 1 1/4".

The only reason to do this mod is if you need more fluid displacement for your your vehicle. Works great! For anyone who's seen the Top Truck Challenge video for my year, I obliterated the competition in the braking test. Remember though, really only does any good if you have more fluid displacement needs.

post #7 of (permalink) Old 05-15-2002, 09:05 AM
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Re: master cylinder swap

Glen, are you talking about required displacement for disk rears, or just larger front calipers? Sounds like the larger bore would just speed up the actuation , and may cause premature wear or lockup . Let us know...
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post #8 of (permalink) Old 05-15-2002, 09:15 AM
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Re: master cylinder swap

a 1980 pontiac firebird master cylinder. clearance the bolt holes and it fits right in. i'm running d44's so need more brake power. i have to rerun all new hard lines. they only thing i see being a pain in the arse is that the hard lines coming of the master cylinder are hugh. like 5/16 and 3/8. i don't know what size the flex lines are that go into the caliper are yet so i don't know how much i'll have to step it down. plus i'll need a couple of t's to split off the 2 lines out of the master cylinder into 4 lines for the calipers. i just have to hunt all that down and i'll be good. chris
post #9 of (permalink) Old 05-15-2002, 09:25 AM
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Re: master cylinder swap


Whoops!!!

It was the 81 Firebird I originally used. 80 is probably the same too.

On my vehicle I had front and rear Cadillac disc brakes all around. The stock MC just wasn't pushing enough fluid to stop the vehicle.

post #10 of (permalink) Old 05-15-2002, 09:37 AM
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Re: master cylinder swap

what year is the master cylinder supposed to be. you told me 81 and then i got it and i was all wrong so then i went with the 80 model and it fit fine but the output holes are hugh. which is it the 71, 80 , or the 81. i'll use the 80 's model unless the output holes are smaller on the 71. chris
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