Lemon Owner 11 Report post Posted October 7, 2011 No, I have a stock cam & engine & I'm running about 18"-19" of vacuum. It maybe be a problem with your brake distribution/proportioning valve. While most of my problem is cam related some of it is to do with my prop valve. In as much as I do not have one! I run the stock drum/drum distribution block so I do not get as much front brake as I should. Maybe have a look and check that yours is correct for your car and is working properly. Quote Share this post Link to post Share on other sites
danno 128 Report post Posted October 7, 2011 couple hundred bucks more but its 4 piston. its the KH brakes. http://cgi.ebay.com/ebaymotors/?cmd=...#ht_2153wt_941 __________________ I have heard different things about the KH brakes. If the Granada brakes will lock up your front wheels in a panic stop, what is the advantage of the 4 piston? I understand how it could be better, but is it worth all the complication of all the 4 pistons? I also have heard some wheels will not work and you need offset adapters for the KH brakes. Quote Share this post Link to post Share on other sites
gsxrken 21 Report post Posted October 7, 2011 (edited) One of the best tools for braking woes is a pressure gauge. You need to be generating at least 1100 PSI (more is better) to lock up your brakes at speed. I went through all sorts of master cylinders and boosters before I got there. Don't ask me what it cost. Buying things four times can add up! ON EIDT: Lemon- a prop will only kill some PSI to the rear brakes, it won't add to your fronts. Right now you have equal pressure everywhere in the hydraulic system. If you are not locking your rears first on panic stops, you don't need one. You may need a smaller bore MC to increase PSI. Edited October 7, 2011 by gsxrken added a thought Quote Share this post Link to post Share on other sites
Lemon Owner 11 Report post Posted October 8, 2011 Thanks for the advice, I think you're right. I don't want to think about having to change the master cylinder but that is my only alternative. Quote Share this post Link to post Share on other sites
NJ_Bob 10 Report post Posted October 9, 2011 A pressure guage sounds interesting. How do you use it? Quote Share this post Link to post Share on other sites
Grabber70Mach 107 Report post Posted October 9, 2011 Unscrew the caliper bleeder screw and remove, choose the correct adapter attach to gauge and then screw in caliper. Have a helper push the brake pedal while you watch the gauge. Remove and reassemble repeat on other calipers. Quote Share this post Link to post Share on other sites
Lemon Owner 11 Report post Posted October 10, 2011 ON EIDT: Lemon- a prop will only kill some PSI to the rear brakes, it won't add to your fronts. Right now you have equal pressure everywhere in the hydraulic system. If you are not locking your rears first on panic stops, you don't need one. You may need a smaller bore MC to increase PSI. I installed the later prop valve on the weekend and as you expected there was no change. (Althouhg I am glad I fitted it finally!) I did have one thought that I forgot to mention last week. The brake booster that cam with the CSRP kit is only a smaller booster than normally fitted to a 69(My mach1 is quite a bit larger). I suspect that this is too small for my setup and does not apply as much brake pressure as it perhaps should. What adds credence to this theory is that I really have to apply alot of foot pressure at lower revs (also partly due to my cam). But I could be wrong! Quote Share this post Link to post Share on other sites
gsxrken 21 Report post Posted October 11, 2011 Unless you have one of the two chamber dual diaphragm ones, bigger is better when it comes to vacuum boosters. My cam (248* at .050) was too much for the stock booster at low RPMs and I eventually went to a Hydratech booster. Not cheap but end of story. (My stock booster is available if someone is interested. Make offer) When I was testing my brake pressure with the aforementioned gauge, at one point I pulled off my truck's booster line, put in a coupling and ran a 10foot length of vacuum hose over to my Mustang's booster. Started the truck and my Mustang's pedal feel and the PSI delivered to the calipers was transformed. That told me my booster was fine but just wasn't going to work with my cam. Quote Share this post Link to post Share on other sites
Lemon Owner 11 Report post Posted October 12, 2011 Cool thanks for the info, new booster it is! Quote Share this post Link to post Share on other sites
tonyinsandiego 37 Report post Posted November 23, 2011 Here is a quick question for the experts- Swapped drum brakes to disk. Used the brake system from Baer Kit# 1261074 SS After swapping out the brakes I had to change my pedal. Now the pedal is way to high. I'd like to set the pedal height to use with my foot and not my knee. Any tips or advice? Thanks Quote Share this post Link to post Share on other sites
machon 10 Report post Posted November 23, 2011 Pyetime...i went from factory power disc's in front and the drum behind, to baer 4wheel disc brakes...it was 100% bolt on with booster. It is money well spent they are basically modern corvette system as far as pads and so on, with out of this world stopping power Quote Share this post Link to post Share on other sites
cobra460jet 10 Report post Posted November 23, 2011 I just got some used 70 disc brake spindles so I could run the bigger bearings. Got the single piston calipers from NPD. Then get a set of rotors that are still currently available from the auto parts stores. Whats the big deal with all the generic stuff? Quote Share this post Link to post Share on other sites
Pyetime 10 Report post Posted November 24, 2011 Pyetime...i went from factory power disc's in front and the drum behind, to baer 4wheel disc brakes...it was 100% bolt on with booster. It is money well spent they are basically modern corvette system as far as pads and so on, with out of this world stopping power If you dont mind me asking what did your set up cost? Quote Share this post Link to post Share on other sites
Pyetime 10 Report post Posted December 11, 2011 I'm looking around still trying to determine what brake kit to go with and now I have a new question. How do you identify that your 9" rear end has small bearing rear axles? A lot of the kits I see specifically mention this and I'm not sure what to look for to make sure I get the right kit ordered. Quote Share this post Link to post Share on other sites
Pyetime 10 Report post Posted December 11, 2011 Never mind, I found an old thread, its a small bearing. Quote Share this post Link to post Share on other sites
Pyetime 10 Report post Posted March 14, 2012 So I finally made a decision and went with a nice Wilwood front kit set up and I have rebuilt my rear drums for now (budget's getting a little tight with what I told the misses it would cost). Rear discs to follow down the road. I also have decided to upgrade to power assist, so I have the booster with pedal headed this way. Question, can I mount the power pedal to the current bracket or do I need an entirely new one to mount to the firewall? Quote Share this post Link to post Share on other sites
StephenC 10 Report post Posted March 14, 2012 So I finally made a decision and went with a nice Wilwood front kit set up and I have rebuilt my rear drums for now (budget's getting a little tight with what I told the misses it would cost). Rear discs to follow down the road. I also have decided to upgrade to power assist, so I have the booster with pedal headed this way. Question, can I mount the power pedal to the current bracket or do I need an entirely new one to mount to the firewall? Nope you can mount the pedal to your existing pedal assembly no problem. I dont even thing you will have to take it out of the car. What Willwood brakes did you go with? I am currently looking at a set of discs from them for my rear and once I get money ones for the front also. Quote Share this post Link to post Share on other sites
panteramatt 1 Report post Posted March 14, 2012 The pedal mounts to a different location in the bracket though. Took me a minute to figure that out. Quote Share this post Link to post Share on other sites
Pyetime 10 Report post Posted March 14, 2012 Nope you can mount the pedal to your existing pedal assembly no problem. I dont even thing you will have to take it out of the car. What Willwood brakes did you go with? I am currently looking at a set of discs from them for my rear and once I get money ones for the front also. Great, good to know, thanks! It looks like a fun job! I went with this kit http://www.jegs.com/i/Wilwood/950/140-11071/10002/-1. It was really to install, looks great and works with my Magnum 500's. Quote Share this post Link to post Share on other sites
Pyetime 10 Report post Posted March 14, 2012 The pedal mounts to a different location in the bracket though. Took me a minute to figure that out. Yeah, I'm claustrophobic just thinking about it! I'm for sure going to take the driver side seat out before attempting to work in those tight quarters. Quote Share this post Link to post Share on other sites
panteramatt 1 Report post Posted March 14, 2012 Oh yea its a huge pain. Im 6'3" 240. I did it with the seat in! I hope to NEVER be under the dash again after that!!! Quote Share this post Link to post Share on other sites
StephenC 10 Report post Posted March 15, 2012 Great, good to know, thanks! It looks like a fun job! I went with this kit http://www.jegs.com/i/Wilwood/950/140-11071/10002/-1. It was really to install, looks great and works with my Magnum 500's. Those are the exact type calipers I was looking at except for the rear. What size Magnums are you running? Quote Share this post Link to post Share on other sites
Pyetime 10 Report post Posted March 15, 2012 Those are the exact type calipers I was looking at except for the rear. What size Magnums are you running?[/QU I've got 15" Magnums! Quote Share this post Link to post Share on other sites
Pyetime 10 Report post Posted March 15, 2012 Oh yea its a huge pain. Im 6'3" 240. I did it with the seat in! I hope to NEVER be under the dash again after that!!! 5'10" 185! You've inspired me to keep my seat in! :thumbup1: Quote Share this post Link to post Share on other sites
Lemon Owner 11 Report post Posted March 15, 2012 You won't have to take the seat out. It is a pain but it is not too bad. Quote Share this post Link to post Share on other sites
