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Front disc brake conversion kit

6K views 14 replies 8 participants last post by  Elmer  
#1 ·
Hi,
I have been reading a lot of threads of "how to..." convert to front disc brakes but I still feel a little bit unsure and have to ask the specialists here if you can give me an advice. My problem is that I live in Sweden and can't visit any store so I can see the parts before I order them. Also, the shops in Sweden do only offer to import parts from Classic Industries.
Can someone give me an advise if the front disc convertion kit with part number #RS900145 from Classic Industries will fit my 67 camaro :confused: since I will not be able to return them if they don't fit :(
If it don't fit I would be very grateful for a recommendation of what kit to order.
My car is sold and still equipped with manual drum brakes...
Do you need more info...?
Rgds/Elmer
 
#2 ·
Have you checked Summitracing.com yet?
They ship internationally and they have kits for our Camaros. I just finished installing a front brake conversion kits from them and it looks great.
I chose the slotted and dimpled rotors asI have found that they do a fantastic job when they are wet as well as dry..

You will need to change the brake line going to the rear as it is a different size bolt going to the port valve.
I got my line from Matt's classic bowties and it comes in 2 pieces...
I hope this helps.

Rob
 
#5 ·
Rob & John & Jerry,
Thx for your feedback.
I have visited Summit's and CPP's webpages and it looks good. However I will end up with a better price (in Sweden) if ordering the kit from Classic Ind. via a swedish company.
Do you know if the disc kits from Classic Ind. are OK as well?
Also, I have seen a lot of questions here about what master cylinders to use but I am not sure if I have understood the answers, but as I can see some people say that it will work with the manual drum brake master cylinder while other say that you need a disc/drum master cylinder.
Anyone who knows the truth?

Jerry,
Thx for a nice documentation. Very useful when I will do the swap.

Rgds/Mikael
 
#6 ·
After using the search function in read all I found about converting from drum to discs I will try to answer myself if someone else is looking for this info.
My car has manual drum brakes on all four wheels. My intention is to convert to front discs and keep the rear drums but I will install a power booster to get modern brakes.
One of the issues has been that it's hard to know if the converstion kits really includes everything. Has been in contact with CPP and their kit looks nice (thx Vega$69 and jr68).

My first thought was to only replace the front drums with discs and set it up as a manual system and continue the converstion to power brakes later on.
However I have realized that a master cylinder made for front drums/rear drums (as I have) can not be used with front disc brakes. This because the fluid volume in the master cylinder is to small for disc brakes. Also a drum master cylinder has residual valves at the outlet to keep a residual pressure on the drums. This will not work with disc brakes.

I will do complete convertion to power disc/drum brakes. It is only stupid to not replace the master cylinder at once since it is probably well used and needs to replaced anyway.

Rgds/Mikael
 
#7 ·
:D
After using the search function in read all I found about converting from drum to discs I will try to answer myself if someone else is looking for this info.
My car has manual drum brakes on all four wheels. My intention is to convert to front discs and keep the rear drums but I will install a power booster to get modern brakes.
One of the issues has been that it's hard to know if the converstion kits really includes everything. Has been in contact with CPP and their kit looks nice (thx Vega$69 and jr68).

My first thought was to only replace the front drums with discs and set it up as a manual system and continue the converstion to power brakes later on.
However I have realized that a master cylinder made for front drums/rear drums (as I have) can not be used with front disc brakes. This because the fluid volume in the master cylinder is to small for disc brakes. Also a drum master cylinder has residual valves at the outlet to keep a residual pressure on the drums. This will not work with disc brakes.

I will do complete convertion to power disc/drum brakes. It is only stupid to not replace the master cylinder at once since it is probably well used and needs to replaced anyway.

Rgds/Mikael
I just want to jump in with one clarification. The belief that one cannot run front discs and rear drums with a stock master cylinder is an absolute and total myth. Two friends and me all dispelled that myth. I installed Strange front discs on my car with my stock master cylinder, lines and rear drums. During that 3 year period, my car ran between 10.30's and 9.60's, so the brakes got used like crazy with zero issues. Again, I just wanted to express this, as I've heard that myth perpetuated by many.

That being said, installing front and rear discs with a new master, as you've mentioned, is optimal. Just wait until others begin debating the use of a residual pressure valve or proportioning valve. Enjoy!
 
#8 ·
One difference is the master cylinder between 'all drums' and 'disk / drum' combo for '69 Camaro is that the all drum Master cylinder has 1" cylinder/piston, whereas the front disk MC has a 1-1/8" dia piston. I interpret this to mean that yuo have to move more fluid from MC to caliper for a disk brake to engage than for a drum front wheel cylinder..

Gary
 
#10 · (Edited)
Jim,

Interesting point...
I have acually thought about what you did as a first part of the brake conversion - to install front discs and keep the MC for time being and install a new MC later on. But I did actually think it was impossible due to the residual valves.
Did you have to remove the residual valves? I thought they were integrated in the MC...

I have to order a lot of parts from U.S. and have to prioritize what to buy for next season. For example, a disc brake kit is very expensive to ship to Sweden. I have to pay approx $750 for shipping to Sweden. That includes Swedish taxes and duty.

Dont want to sound like a greedy swede but the money is a limiting factor...

Rgds/Mikael
 
#11 ·
Jerry,

Are you satisfied with the braking capacity?

Have read in different posts in this forum that some people have installed power brakes but changed back to manual since the power brakes are too sensitive. With sensitive I understand it as you can only brake very smooth by just touching the pedal. If you apply a little more power to the pedal you will lock up the wheels.

I want good brakes but not brakes that are too sensitive.

Rgds/Mikael
 
#13 ·
Jerry,

Are you satisfied with the braking capacity?

Have read in different posts in this forum that some people have installed power brakes but changed back to manual since the power brakes are too sensitive. With sensitive I understand it as you can only brake very smooth by just touching the pedal. If you apply a little more power to the pedal you will lock up the wheels.

I want good brakes but not brakes that are too sensitive.

Rgds/Mikael
Elmer it stops fine and I like the feel of manual brakes, I can feel the brakes better I have more control. The car doesnt weigh that much anyway so it doesnt take much to stop it.
 
#12 ·
#14 ·
I converted a 69 to disk and only changed the rubber lines up front , and used the drum master cylinder and it worked great. If you want to save $ you can use Chevelle or later Nova spindles and use the rear steer steering arms off of your drum set up. I have done this many times. I have a budy with a junk yard and have used this method on 67- 69 camaro's. I'm sure you can find used Nova spindles in Sweden with out a problem.
 
#15 · (Edited)
Keith,
Thanks for the tip. I will investigate this with the swedish junk yards.
The tricky thing for me is that I am new to GM cars. Have only been used to German Fords in the past years (did own a -67 Ford Taunus 20M TS Hardtop).
Did actually find a shop here in Sweden that sells front disc brake converstion kits from CPP and those kits includes a power booster for the price of approx $1000. It will be much more expensive for me to try to import it by myself from CPP so that might be the way to go.
Anyway. I really appreciate your tip :)

Rgds/Mikael