drdave88

iTrader: (3)

I have a couple, PM me if you need one.

TrackAficionado

Any one still have a 30lb spring? pm or email me plz 01knightridergt@gmail.com

55ChevyMan

I have one left

ringo234

I did the same thing a while back.

Slush92RS

iTrader: (6)

I'm making the swap to manual brakes, will this spring mod still make an improvement?

If anyone has a spare spring PM me and I will Paypal you the funds

55ChevyMan

This for 4 wheel disc and improves rear disc brakes

Brian Wishin

Hey there, By any chance do you have the part number for this spring or do you have any extras your willing to sell?

55ChevyMan

part # 1ncf2 spring from Granger

Johnny Blaze

iTrader: (15)

Did this the other day, mine was horrible, gummed up, spring stuck.
Front spring as bad, I'm sure, anyone know what spring would work for the front setup?

Gregs_GSXR

i just ordered some from Grainger today, pick them up tomorrow, cleaned up my prop valve, dirty and gummed up inside. I will have some left over

ringo234

I'm not sure what you mean by manual brakes.

Johnny Blaze

iTrader: (15)

^ manual brakes means no power assist. No booster

Dominic Sorresso

Any idea of a proportioning spring for use with C6Z06 brakes?

Gregs_GSXR

it should work with any 4 wheel disc, Im currently running CTS-V on all 4 corners on mine, which I had it set up with LS1 before

tglennon11

iTrader: (2)

hey guys, I have been through this thread and either i didnt see it or its not there, but has anyone run LS1 brakes front and rear with the spring change in a stock 87 drum prop valve? If so what spring?

Gregs_GSXR might be the best one to answer if you can.

Dominic Sorresso

I had C5 brakes on my 84 Vette. Doug Rippie sells a proportioning spring for that upgrade which I used. Worked fine. I think it was about $12.

tglennon11

iTrader: (2)

Thanks Dominic!

Gregs_GSXR

part # 1ncf2

i have some of these left over and is what Im running on my current set up

cam406406

iTrader: (1)

Can u remove spring for full pressure?

82tarecaro

iTrader: (4)

That would be very dangerous unless you are installing an adjustable proportioning valve. Full pressure to the rear brakes would cause them to lock up before the fronts, possibly causing you to lose control of the car.

cam406406

iTrader: (1)

I understand that but with wilwood and 13" roters on front and the crap irons on the rear my fronts Do all the work Just looking for more out of the rear

82tarecaro

iTrader: (4)

If you lock up the rears first, the rear will kick out and you will lose control of the car. Very dangerous - it's your car but it is very irresponsible to do something like that and put everyone else in danger who happens to be on the road when you lose control.
Put in an adjustable proportioning valve and consider beefing up the rear brakes to a better set up so you get the bias set properly.

55ChevyMan

No No

Johnny Blaze

iTrader: (15)

Have you tried the spring upgrade?

cam406406

iTrader: (1)

No not yet
What spring do u recommend

Gregs_GSXR

see post 268

Johnny Blaze

iTrader: (15)

I have a few springs left as well. $5 shipped. PM me if interested.

87_LG4

Just saw this thread. Why have I not seen this thread before?!?

Anyways. Looking for a spring to put in my 87. I've got LS1/C5 front and stock drums rear with the original prop valve. Rears will keep turning when the car is jacked up and brake pedal floored, so I definitely need to do something about that.

(...)

In my original post I asked if anyone could send a spring to Norway where I live, mainly because I didn't know of any places in Norway that makes springs like these. But now I might have found someone who does. But I wanted to check if the measurements I've used are correct.

So I am looking at four different springs:
- They all have an outside diameter of 12.19mm, which should convert to .480"
- They all have an uncompressed length of 38.10mm, which should be 1.5"

Spring #1 has a thickness of .055", an inside diameter of .37", 13.5lb and a spring rate of 18.33lb/inch
Spring #2 has a thickness of .059", an inside diameter of .36", 15.5lb and a spring rate of 24.67lb/inch
Spring #3 has a thickness of .063", an inside diameter of .35", 19.1lb and a spring rate of 31.63lb/inch
Spring #4 has a thickness of .067", an inside diameter of .34", 22.3lb and a spring rate of 40.31lb/inch

Will any of these fit my car and application?
Also, are you guys changing the prop valve, or the metering valve?


Thank you.
-Dennis

87_LG4

Tried the 15.5 lbs spring this weekend. It really made an improvement on my LS1/drum setup. Only had time to do a short drive without any hard braking, but the pedal feels better and the brakes grip firmer and faster than before. Now I actually believe my brakes can stop my car. Probably one of the quickest and cheapes upgrades anyone can do to these cars. Love it

83L69Camaro

Been reading all the threads on the brakes. I have a 83 Z28 with 4 wheel disc, ordered it new, and the rear brakes have never worked. Rotors and pads are like new, 66K mi. So far I've replaced the MC, PPV, and no luck. Bought a new PPV from Summit and the brakes worked fine after they were bled. Then while holding the pedal it went down and they haven't worked again. checked the lines to see if they were plugged and they're clear. I'm at a loss, been doing this for close to 50 yrs. and never had this much trouble with brakes. Just went to bone yard and got a PPV off an 87, looks like the one in the threads got springs to change the spring just hate to change the fittings to metric and not have it work. When you push on the pedal good fluid comes out of the MC for the front breaks but the rear just seems to run out very slow unless you jam on the brake pedal then it will shoot out. Trying to keep it stock. Allot of great information in these threads hope someone can help an old Camaro guy out.

mjdavis68

iTrader: (1)

Just placed an order and will have xtra

mjdavis68

iTrader: (1)

got them today

Angelduran5858

Wondering how much to sell one?
Also which ones did you get?
Thanks

Gumby

My upgrade was to get a Disc/Drum brass hotrod prop valve off ebay and convert everything to standard lines.

[ditching the metric line stuff]

resop27

iTrader: (8)

if anyone has one of these springs for sale pm me

camaro211z28

If I keep stock 3rd gen rearemnd and pull drums off and put factory 3rd gen disc brakes on the rear. Will I have to upgrade the spring or get a proportioning valve off a factory disc brake car?

GTAman

iTrader: (2)

Good luck finding a disk brake prop valve. The spring upgrade is definitely worthwhile.

Also I have 4 springs left.

camaro211z28

Im at junkyard right now getting two of them. Lol. I got the disc brake setuo off this same car last weekend but didnt think about the prop valve. But there is two rear disc brake camaros here at the yard one is already stripped though. Nobody sells the prop valve new for disc brakes?

camaro211z28

Im at junkyard right now getting one now. Lol. I got the disc brake setuo off this same car last weekend but didnt think about the prop valve. But there is two rear disc brake camaros here at the yard one is already stripped though. Nobody sells the prop valve new for disc brakes?

Gumby

no one sells them direct fit, but you can find plenty of uni hotrod brass prop valves, in disc disc or disc drum....... nothing about a prop valve makes it a one car design.

Id avoid junk yard million mile parts and longevity......

87camaro kid

Are you willing to pop one in the mail to south jersey? Let me know the cost.

Johnny Blaze

iTrader: (15)

Got several springs left as well, $5 shipped

mjdavis68

iTrader: (1)

I'm out, all sold

Magman

iTrader: (6)

I just ordered a pack of 5; 1NCR5. Expected delivery of Tuesday, Pm me if you need one.

83L69Camaro

Got the brakes done. Got a Proportioning valve bleed tool and help out with the bleeding.
Works real good if you don't have one in your toolbox your missing out takes the proportion valve issues out of bleeding brakes. Used a new proportioning valve from Summit, rear brakes work great. Thanks to third Gen.org for all the help.

1991sleeper

iTrader: (-3)

I need one !... I have factory disc brakes out of a 92' GTA still running the factory 91' drum valve

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

scoflaw

iTrader: (2)

Using the 1ncr5 spring. Can anybody recommend another spring for more rear brake pressure?

Magman

iTrader: (6)

I have 3 springs available. 1NCR5 PM me if you want one.

NCC-2569

iTrader: (1)

Hey guys,

I was thinking.
My car and at least one other F-body and one other car are having the issue of the drums locking up fairly quickly even with moderate pedal pressure.
What would happen if the spring in the prop valve were to weaken over the years and lose some force?
I guess it would compress real easy and give way to the pressure coming down the line, just like when someone slams the brakes.
Is this correct?

89ROC-Z

iTrader: (7)

I need an R5 and will pay shipping. If someone has one please PM me!!!