Disc brake conversion - master cylinder - The 1947 - Present Chevrolet & GMC Truck Message Board Network

clemsonteg · 10-20-2012, 07:29 PM

I was looking at the ECE brake conversion for my 70 c10. I noticed it comes with a new dal pot master cylinder, proportioning valve and a new line that needs to be bent. I seem to have all those parts already so do I have to replace them? Is there something different about those parts made specifically for disc brakes? Below is a picture of my current setup.

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shawno72 · 10-20-2012, 07:33 PM

That is not a proportioning valve, its just a distribution block so you will need the prop valve.

GMCJOE · 10-20-2012, 07:40 PM

not knocking ECE, but check out GMCPauls also. They have a pretty good deal on there brake conversion kits. The proportioning valve is different (disc/drum). From research I have done, there are different M/C's for power and non power. And I also believe the lines are different from when I was looking thru LMC's parts catalog. I bought a complete setup from a member here on the forum. All the lines, M/C, brake booster, and pedal setup.

**jocko** · 10-20-2012, 10:44 PM

what year is your truck? If pre-71, you'll need the master cylinder, prop valve, and new lines - the disk/drum master normally has different size reservoirs and the prop valve has a job to do between disk/drum setup. If you happen to have an early 71 that still has dual drum, then will need it all for that as well. Disks were supposed to be an option on 71's (reference the disk brake option sticker on 71 tailgates) but I'd swear they became standard by the end of the year (can't prove it, just a theory). Also, front/rear brake line size is normally different between disk and drum. So, I'd go for the whole kit. I've never had a problem with ECE or POL. CCP has good stuff, but have heard a few folks complain on here about it. But I think there is a rep on the board.

10-20-2012, 07:29 PM	#1
clemsonteg Registered User Join Date: Jul 2012 Location: Anderson,SC Posts: 953	Disc brake conversion - master cylinder I was looking at the ECE brake conversion for my 70 c10. I noticed it comes with a new dal pot master cylinder, proportioning valve and a new line that needs to be bent. I seem to have all those parts already so do I have to replace them? Is there something different about those parts made specifically for disc brakes? Below is a picture of my current setup. Posted via Mobile Device Posted via Mobile Device

10-20-2012, 07:33 PM	#2
shawno72 C/10 junkie Join Date: Nov 2010 Location: Stockton Ca Posts: 9,093	Re: Disc brake conversion - master cylinder That is not a proportioning valve, its just a distribution block so you will need the prop valve. __________________ Shawn 70 LWB C10 current driver/project http://67-72chevytrucks.com/vboard/s...d.php?t=663051 68 SWB C10 Work in progress.....SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=559520 72 LWB C10 Sold 71 LWB C10 Sold 68 LWB C10 CST Sold http://youtu.be/kbB0QrBIs9k My mom always had the best advice. It was just a tad late. After a fall that involved blood, she'd say....."Careful!"

10-20-2012, 07:40 PM	#3
GMCJOE Registered User Join Date: Aug 2012 Location: Junction City, KS Posts: 782	Re: Disc brake conversion - master cylinder not knocking ECE, but check out GMCPauls also. They have a pretty good deal on there brake conversion kits. The proportioning valve is different (disc/drum). From research I have done, there are different M/C's for power and non power. And I also believe the lines are different from when I was looking thru LMC's parts catalog. I bought a complete setup from a member here on the forum. All the lines, M/C, brake booster, and pedal setup. __________________ Joseph Joe's 69 GMC http://67-72chevytrucks.com/vboard/s...d.php?t=543253 1969 GMC SWB-350 SBC 700R4 2013 Ram 2500 CC Laramie Longhorn Edition-6.7 PPEI EFI Live CSP5 5” ProFlo Exhaust

10-20-2012, 10:44 PM	#4
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,935	Re: Disc brake conversion - master cylinder what year is your truck? If pre-71, you'll need the master cylinder, prop valve, and new lines - the disk/drum master normally has different size reservoirs and the prop valve has a job to do between disk/drum setup. If you happen to have an early 71 that still has dual drum, then will need it all for that as well. Disks were supposed to be an option on 71's (reference the disk brake option sticker on 71 tailgates) but I'd swear they became standard by the end of the year (can't prove it, just a theory). Also, front/rear brake line size is normally different between disk and drum. So, I'd go for the whole kit. I've never had a problem with ECE or POL. CCP has good stuff, but have heard a few folks complain on here about it. But I think there is a rep on the board.



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