LS1 master cylinder
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Senior Member
Joined: May 2011
Posts: 855
Likes: 1
From: New Bedford MA
Car: 1988 Gta trans am
Engine: LR4 4.8
Transmission: 98-02 t56 6 speed
Axle/Gears: Bw 9 bolt (3.70’s) pbr rotors
LS1 master cylinder
Heh everyone i got a question can the LS1 master cylinder work with a 3rd gen booster also what prop valve do you guys use with it. I have a 89+ prop valve and was wondering if that will work
Joined: Aug 2006
Posts: 12,805
Likes: 107
From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: LS1 master cylinder
It will work but the lines from the master to the booster need a little tweaking.
A 1le valve or 88 amd later disc/disc valve should be fine.
A 1le valve or 88 amd later disc/disc valve should be fine.
Joined: Mar 2002
Posts: 854
Likes: 10
From: Rincon, Ga.
Car: 91 Camaro RS
Engine: 305 TPI conversion.
Transmission: T56
Axle/Gears: 3.73 posi 4th gen rear
Re: LS1 master cylinder
I had cut off the mounting bracket to the prop valve. It made tweaking the lines much easier
Thread Starter
Senior Member
Joined: May 2011
Posts: 855
Likes: 1
From: New Bedford MA
Car: 1988 Gta trans am
Engine: LR4 4.8
Transmission: 98-02 t56 6 speed
Axle/Gears: Bw 9 bolt (3.70’s) pbr rotors
Re: LS1 master cylinder
Ok looks like im gonna purchase a 98-02 master clyinder are they all the same bore size from 98-02 or should i go with the 2000-2002 style or just get a 98-99
Senior Member
Joined: Apr 2007
Posts: 668
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From: wallingford,ct
Car: 91 formula ws6
Engine: 355 tpi OBDII
Transmission: 4l60E
Axle/Gears: 2.73 with 4th gen brakes
Mine went on with minor tweaking. Been that way for 4+ years now. I also have a 91 prop valve.
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