Proportion/combo, valve difference questions
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Junior Member
Joined: Jun 2012
Posts: 46
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From: Las Cruces, NM
Car: 91 Camaro
Engine: LS1, LSXRT &102mm TB, Cam,225 Heads
Transmission: T56
Axle/Gears: 9" 4.10 w/31 spline axles
Proportion/combo, valve difference questions
Ok switching over from drum to pbr disc in the rear. Guy before me adjusted brakes somehow so for some reason brakes almost all in the front. What or how would he have done this? Second is there a difference between combo valve for rear cast calipers over pbrs?Third, Can I Visually tell if a combo valve is disc/disc or disc/drum?Fourth I have a 92 z28 disc/disc valve I can pull or I have a 86 WS6 should be Disc/disc valve laying around, is one better than the other or are they the same rather just use the WS6 one cause its its already out but if the Zs better Id like to know
Thanks
Thanks
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Proportion/combo, valve difference questions
Check the 10-bolt FAQ for brake info.
JamesC
JamesC
Thread Starter
Junior Member
Joined: Jun 2012
Posts: 46
Likes: 1
From: Las Cruces, NM
Car: 91 Camaro
Engine: LS1, LSXRT &102mm TB, Cam,225 Heads
Transmission: T56
Axle/Gears: 9" 4.10 w/31 spline axles
Re: Proportion/combo, valve difference questions
Yeah checked that. Gave some really good info. Didnt touch on everything I was curious about. Just gonna call it safe and pull the z28 s.
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Proportion/combo, valve difference questions
...is there a difference between combo valve for rear cast calipers over pbrs?
Can I Visually tell if a combo valve is disc/disc or disc/drum?
I have a 92 z28 disc/disc valve I can pull or I have a 86 WS6 should be Disc/disc valve laying around, is one better than the other....
Can I Visually tell if a combo valve is disc/disc or disc/drum?
I have a 92 z28 disc/disc valve I can pull or I have a 86 WS6 should be Disc/disc valve laying around, is one better than the other....
No.
The tube nut threads changed in late 89, IIRC, so the valve from the 86 shouldn't fit your 91--and wouldn't be the best choice anyway. The 92 valve should be perfect.
Of course, you could always go the adjustable route.
JamesC
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