1950 Special Deluxe Posted August 31, 2011 Report Posted August 31, 2011 While searching on this site about making a pressure bleeder.(I will create a different thread if it works) I read up on remote master cylinder reservoirs. I am looking at tapping a 1/4" hole into the plug on my master cylinder to use my pressure bleeder. I came across the Pegasus reservoir. https://www.pegasusautoracing.com/productdetails.asp?RecID=1123 It appears to be quite easy to install a 1/4" line from the remote to the master cylinder. My question is; are there any other modifications necessary? The one thing that troubles me is that when you depress the brakes and fluid travels out, the master cylinder would fill back up via the remote. Would there be enough pressure in the smaller of the 2 holes in the master cylinder to force brake fluid back up the line or would the brakes be slower to release? Sorry for the long winded story. Quote
OldDad67 Posted August 31, 2011 Report Posted August 31, 2011 You can go to your local u-pull it yard and get one of these off an S-10 Chevy for about $5.00 and do it yourself. I'm cheap and I'd rather spend $40.00 on something better that an over priced plastic bottle. That's just my 2 cents worth. Quote
ptwothree Posted August 31, 2011 Report Posted August 31, 2011 While searching on this site about making a pressure bleeder.(I will create a different thread if it works) I read up on remote master cylinder reservoirs. I am looking at tapping a 1/4" hole into the plug on my master cylinder to use my pressure bleeder. I came across the Pegasus reservoir.https://www.pegasusautoracing.com/productdetails.asp?RecID=1123 It appears to be quite easy to install a 1/4" line from the remote to the master cylinder. My question is; are there any other modifications necessary? The one thing that troubles me is that when you depress the brakes and fluid travels out, the master cylinder would fill back up via the remote. Would there be enough pressure in the smaller of the 2 holes in the master cylinder to force brake fluid back up the line or would the brakes be slower to release? Sorry for the long winded story. I did something like this on a '59 volvo that has a master cyl. setup similar to whats on our Mopars. I used a Wilwood master and remote res kit. The nice thing about this was the cap for the master included in the kit. It has a nipple on it ready to hook up a feed line to it. Anyway, it worked great with no problems like you are worried about. Just wish I'd measured that cap to see if it would fit my '51. I want to try what you are talking about, but am concerned about chopping up the stock res cap. Just my two sense........ Quote
Plymouthy Adams Posted August 31, 2011 Report Posted August 31, 2011 The fluid in the piston is ample to engage the brakes if adjusted properly...in other words are you getting a full pedal and coming to a full stop without having to pump the pedal? Only time more fluid can go forward from the cylinder is during a subsequent stroke....so no you will not be flooding the reservoir..it will only take in what is displaced and a properly adjusted and bled system will not tap the reservoir till you either have a leak, or shoe/pads wear and thus the added displacement..if calipers, this displacement is due to wear and is pernament and thus the lowering of fluid level in the master..with the rear..only by adjusting the shoes closer to the drum can you change the displacment of fluid in the rear (or pumping action to get the added travel to engage) Quote
JoelOkie Posted August 31, 2011 Report Posted August 31, 2011 I tapped this cap from an old MC to make a compressed air bleeder. You can get a hose barb fitting with an O ring and do what someone else suggested, find a salvage vehicle with a remote reservoir, and drill and tap the cap you have. I bought a remote kit for my Dodge truck from Summit Racing. It is just a piece of hose and a plastic vessel, and I ended up having to make my own leak tight connection to my master cylinder, so I really didn't get a lot for my 40 odd bucks, but it was quick and easy. Depends on whether (and how close you are) if a trip to the savage is worth it to you, I suppose. Joel Quote
1950 Special Deluxe Posted August 31, 2011 Author Report Posted August 31, 2011 Thanks for the help and ideas. More to think about. Quote
Plymouthy Adams Posted August 31, 2011 Report Posted August 31, 2011 That Pegasus unit look very suspiciously like that of the Sunbeam Alpine/Tiger reservoirs Quote
Niel Hoback Posted August 31, 2011 Report Posted August 31, 2011 Don't forget to plug the vent hole in the side of the square on the cap. Quote
Don Coatney Posted August 31, 2011 Report Posted August 31, 2011 I drilled and tapped a hole in a P-15 master cylinder cap to use with my homeade pressure bleeder. If I recall once I installed the fitting in the hole I drilled it blocked off the vent in the cap. One word of advice when building a pressure bleeder from a garden sprayer, do not let the brake fluid remain in the sprayer after you are done using it. Flush it out with alcohol. The brake fluid will attack the rubber parts inside the sprayer and destroy it. Quote
Young Ed Posted September 1, 2011 Report Posted September 1, 2011 If you find an extra master cylinder the plug in the back that the 2 lines comes out of can be swapped into the top in place of the cap. No drilling threading required. Put a steel line in one side and a plug in the other hole. Quote
OldDad67 Posted September 1, 2011 Report Posted September 1, 2011 While searching on this site about making a pressure bleeder.(I will create a different thread if it works) I read up on remote master cylinder reservoirs. I am looking at tapping a 1/4" hole into the plug on my master cylinder to use my pressure bleeder. I came across the Pegasus reservoir.https://www.pegasusautoracing.com/productdetails.asp?RecID=1123 It appears to be quite easy to install a 1/4" line from the remote to the master cylinder. My question is; are there any other modifications necessary? The one thing that troubles me is that when you depress the brakes and fluid travels out, the master cylinder would fill back up via the remote. Would there be enough pressure in the smaller of the 2 holes in the master cylinder to force brake fluid back up the line or would the brakes be slower to release? Sorry for the long winded story. Here's a photo of the S-10 one I mentioned. I believe it's for the clutch but will certainly work for the brakes, it's also has a mounting bracket built in which requires 2 sheet metal screws. If I remember I paid around $5.00 or less at the local u-pull-it. Quote
1950 Special Deluxe Posted September 1, 2011 Author Report Posted September 1, 2011 Thanks for the picture and the idea. I will try to get to the local salvage yard this fall before it gets too cold. Quote
ptwothree Posted September 2, 2011 Report Posted September 2, 2011 "If you find an extra master cylinder the plug in the back that the 2 lines comes out of can be swapped into the top in place of the cap. No drilling threading required. Put a steel line in one side and a plug in the other hole." What a simple solution!! Anyone out there have an extra master you don't need? Let me know....... Quote
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