Proportioning, Valve. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BOBSJUNKY67SBSS · 04-06-2003, 07:05 PM

IS THE PROPORTIONING VALVE DIFFERENT ON POWER BREAKS WHERE MIGHT I BUY SOME 2 INCH LOWERING BLOCKS FOR COIL SPRING REAR END THANKS BOB.

cali_surfer · 04-07-2003, 08:39 PM

I know this isn't my thread, but I also had a question about proportioning valves. Is one needed when going with front and rear disks? My mind is says yes because of the different brake bias, but since it takes equal pressure to operate as opposed to the disk/drum combo i'm unsure.

apstguy · 04-08-2003, 09:50 PM

I don't think the valve is different power or manual. Can't help you with the coil spring rear end.

Yes you still need a proportioning valve to keep a proper bias, but you need a different one that the stock disc/drum for a disc/disc setup.

BOBSJUNKY67SBSS · 04-08-2003, 10:20 PM

THANK YOU.

*Shane* · 04-08-2003, 10:41 PM

you not only need a different proportioning valve for 4 wheel discs ... but also a different master cylinder.

apstguy · 04-08-2003, 11:55 PM

Really? I figured with a conversion kit you wouldn't have to change the master cylinder. Now that I think about it I guess you would. At least they aren't expensive!

MOTHERTRUCKERS · 04-09-2003, 08:11 AM

76-79 caddy sevile proporioning valve and master was a disc-disc rear wheel drive and is compatable with the truck booster or a WILDWOOD adjustable and drum-drum master works also. I really like the versatility of the WILDWOOD setup.

fast67chevy2002 · 04-13-2003, 04:38 PM

Jegs has a good setup for 4 wheel discs, can't remember the price, but includes master cylinder and (adjustable) proportioning valve. This is what I put on my 67chevy with 13" rotors in front and 9 1/2" rotors in the rear and it seem to be doing good.

MOTHERTRUCKERS · 04-13-2003, 07:30 PM

we sell the Wildwood unit for 39.00 and the master cylinder for 24.00 + shipping.

fast67chevy2002 · 04-14-2003, 11:43 AM

Mothertrucker,

Do you have complete conversions from 4 wheel drum to 4 wheel disc, with all the necessary components? I have started a 67 swb and want set it like the other, but with 13" rotors all around.

If you do, could you e-mail me, thanks.
fast67chevy2002@yahoo.com

69chevystepside · 04-14-2003, 02:51 PM

fast67chevy2002,

i have a 69 stepside converted to 4 wheel discs, purchased from classic performance parts. http://www.classicperform.com. i really like the kit i got. they sell whole kits to add disc and drop at the same time, check it out!

as for the proportioning valve thing, i am currently having problems with mine, too. i think i want to add an adjustible valve to it because i just wrecked my truck a couple weeks ago when some guy ran me off the road. when i hit the brakes, all 4 locked up immediately, causing me to do a 180 and take out a sign with the left rear fender, damaged many suspension parts when i hit the curb. i want the front to grab harder than the back, right? will an adjustible proportioning valve help me?

04-06-2003, 07:05 PM	#1
BOBSJUNKY67SBSS Registered User Join Date: Feb 2003 Location: BLUE,SPRINGS,MO. Posts: 125	Proportioning, Valve. IS THE PROPORTIONING VALVE DIFFERENT ON POWER BREAKS WHERE MIGHT I BUY SOME 2 INCH LOWERING BLOCKS FOR COIL SPRING REAR END THANKS BOB.

04-07-2003, 08:39 PM	#2
cali_surfer Registered User Join Date: Jun 2000 Location: Chico, CA Posts: 1,136	I know this isn't my thread, but I also had a question about proportioning valves. Is one needed when going with front and rear disks? My mind is says yes because of the different brake bias, but since it takes equal pressure to operate as opposed to the disk/drum combo i'm unsure. __________________ My engine is stock... trust me ;o)

04-08-2003, 09:50 PM	#3
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,088	I don't think the valve is different power or manual. Can't help you with the coil spring rear end. Yes you still need a proportioning valve to keep a proper bias, but you need a different one that the stock disc/drum for a disc/disc setup. __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32 Last edited by apstguy; 04-08-2003 at 10:08 PM.

04-08-2003, 11:55 PM	#6
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,088	Really? I figured with a conversion kit you wouldn't have to change the master cylinder. Now that I think about it I guess you would. At least they aren't expensive! __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

04-09-2003, 08:11 AM	#7
MOTHERTRUCKERS Registered User Join Date: Dec 1999 Location: BRADENTON FLA Posts: 3,269	76-79 caddy sevile proporioning valve and master was a disc-disc rear wheel drive and is compatable with the truck booster or a WILDWOOD adjustable and drum-drum master works also. I really like the versatility of the WILDWOOD setup. __________________ Rest in Peace Ed. Thanks for all the good times.

04-08-2003, 10:20 PM	#4
BOBSJUNKY67SBSS Registered User Join Date: Feb 2003 Location: BLUE,SPRINGS,MO. Posts: 125	THANK YOU.

04-08-2003, 10:41 PM	#5
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	you not only need a different proportioning valve for 4 wheel discs ... but also a different master cylinder.

04-13-2003, 04:38 PM	#8
fast67chevy2002 Dad's little helper Join Date: Apr 2003 Location: Helena, MT Posts: 194	proportioning valves Jegs has a good setup for 4 wheel discs, can't remember the price, but includes master cylinder and (adjustable) proportioning valve. This is what I put on my 67chevy with 13" rotors in front and 9 1/2" rotors in the rear and it seem to be doing good.

04-13-2003, 07:30 PM	#9
MOTHERTRUCKERS Registered User Join Date: Dec 1999 Location: BRADENTON FLA Posts: 3,269	we sell the Wildwood unit for 39.00 and the master cylinder for 24.00 + shipping. __________________ Rest in Peace Ed. Thanks for all the good times.

04-14-2003, 11:43 AM	#10
fast67chevy2002 Dad's little helper Join Date: Apr 2003 Location: Helena, MT Posts: 194	quick question? Mothertrucker, Do you have complete conversions from 4 wheel drum to 4 wheel disc, with all the necessary components? I have started a 67 swb and want set it like the other, but with 13" rotors all around. If you do, could you e-mail me, thanks. fast67chevy2002@yahoo.com

04-14-2003, 02:51 PM	#11
69chevystepside Registered User Join Date: Apr 2003 Location: austin, texas Posts: 6	fast67chevy2002, i have a 69 stepside converted to 4 wheel discs, purchased from classic performance parts. http://www.classicperform.com. i really like the kit i got. they sell whole kits to add disc and drop at the same time, check it out! as for the proportioning valve thing, i am currently having problems with mine, too. i think i want to add an adjustible valve to it because i just wrecked my truck a couple weeks ago when some guy ran me off the road. when i hit the brakes, all 4 locked up immediately, causing me to do a 180 and take out a sign with the left rear fender, damaged many suspension parts when i hit the curb. i want the front to grab harder than the back, right? will an adjustible proportioning valve help me? __________________ 69 chevy swb stepside 350 high performance crate motor, 97 vette heads, hooker hedders, weber carb, dual elec. fans, holley elec. fuel pump, f & r sway bars, under bed fuel tank, 4 wheel disc brakes, dakota digital dash, tilt, cruise, sunroof, pwr windows, one cool little truck.



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