Proportioning valve!

[DarkoNova]

I just ordered the Touring Classics brake kit from Tyler at ATS. He said it doesn't come with a proportioning valve, so I'm wondering what would be the best one to get? By best, I mean most complete (all the little sections of tubing, fittings, etc) and ready to bolt on. I've only got a weekend to do this whole stock spindle/drum brake to AFX spindle/disc brake conversion so I need to have every single piece of hardware I'll need.

This is all going on a 69 Nova with rear drums.



Matt

[1969CamaroRS]

I am in the same boat, Touring classics brake kit, with AFX spindles, 69 Camaro thou. Decided to go with a Hydroboost system due to low engine vacuum. Car will have disc/disc.

So far I have heard good things about the Summit proportioning valve (SSBC rebranded supposedly):
http://store.summitracing.com/partde...part=SUM-G3910

Thinking about going with this one.

[Apogee]

X2...Summit Racing #SUM-G3910

I thought it was the same as the Wilwood unit, but it doesn't matter since they're all just cartridge valves anyway. You'll need to fab up your own hard lines and mount the unit to wherever you prefer.

Tobin
KORE3

[DarkoNova]

69camarors, you said you'll be going with a disc/disc setup. Will the Summit piece work with my disc/drum setup?

Matt

[1969CamaroRS]

69camarors, you said you'll be going with a disc/disc setup. Will the Summit piece work with my disc/drum setup?

Matt

I would think it would, but I'll let a brake expert answer that question (I'm still a novice in regards to brakes).

[67w30]

Does the Summit/SSBC proportion valve have a residual valve in it? Would you need to plumb one in if you used this valve on Disc/Disc setup?
Another question is, Can you just gut the back of your disc/drum proportion valve and plumb in an adjustiable wilwood valve? will this work and if so do you still need a residual valve?

[67w30]

I am really looking for some answers on my proportion valve questions. Does anyone have a suggestion or a combonation that worked for them? Help, I posted another post earlier in the week and got no replys, Help!!!
Ken

[jknight16]

I really like the idea behind the SSBC distribution valve w/ built in proportioning valve. Really simplifies the installation, two fewer fittings, two fewer flares, don't have to make a mount for a seperate prop valve. And it replaces the grungy old distribution block you probably have. If i had it to do over again, i'd have used the combo valve. (This of course assumes that the proportioning feature of that combination valve works well, which I have no reason to assume it wouldn't but I haven't tried it myself)

From what I learned in working with my car.....You may be able to re-use your current distribution block, i did on my car, but you will still need to plumb in the proportioning valve and you will need to eliminate the factory residual pressure valve or you will have dragging rear brakes. Some guys use a much lighter residual pressure valve with their rear discs, 2lb vs. 10lb, but this is typically to facilitate fine-tuning that you may or may not need or want to do once you drive the car (this will depend on a multitude of factors). It's a case-by-case basis kind of thing. I am not running a residual pressure valve and my brakes work very very well.

[67w30]

Thank You. I appriciate your help.
Ken

[jknight16]

No problem, these are confusing and stressful concepts for anybody doing it the first time. I know, been there and done that. Feel free to ask questions, EVERY one of us has been through these topics since very few of our cars came with 4 wheel discs. Once you've done it and made it work the first time, you'll feel much more comfortable.

But, as always, you never know everything and somebody always knows more. That's why guys like Tobin at Kore3 and Frank at Prodigy are awesome resources for stuff like this.

[DarkoNova]

Tobin, would that Summit Racing piece be acceptable for my car? I'd rather not convert to rear discs right now because that's a lot more than I'd like to spend right now.

I just want to get these spindles and discs up front and have a car that stops safely.

Actually, could I just get that Summit proportioning valve and then use this residual pressure valve?

http://store.summitracing.com/partde...5&autoview=sku

Would that work?

Matt

[Apogee]

Matt, you can use the Summit adj PV with discs or drums without any issues so long as the rest of your components are sized correctly for a somewhat balanced system. Lots of people swap to C5/C6 fronts and wait to do the rears for money reasons without any ill effects.

Depending on the MC you're going to run, it may already have a 10# residual pressure valve (RPV) in the port to the rear brakes if it came from a disc/drum application. You can tell by looking in the port on the MC for a brass conical disc, which is the RPV. Behind the disc is a spring and check ball...pretty simple stuff really.

Otherwise, if you're going to plan ahead for converting to rear discs in the future and run a disc/disc MC then the in line proportioning valve you listed above would work fine with your drums.

Tobin
KORE3

[DarkoNova]

Sweet, thanks. I guess I'll have to contact Touring Classics to see if the master cylinder has a residual pressure valve in it.

Matt

[73novaguy]

So I geuss that I should take a look at my dist block (stock) cause I have never looked at it! haha I put a new MC on and plumbed in a prop valve on the rear line after I put in the rear discs. So this will affect my braking how? By not allowing the fluid to travel to the rear Wilwood discs? It limits rear flow? Ive just been looking for a reason to get rid of my stock ugly dist block and its ugly coiled lines. I know I will need some sort of coil on the lines to accomodate for body flex. So this renamed Summit peice will work fine for my stock power disc up front and Wilwood rears? Sometime I plan on upgrading to Wilwood 6 piston 13" vented fronts. I assume that will be kosher also with this Summit peice. Also the new Wilwood MC what size would I need for future reference? Thanks guys!