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Front brake cylinders
Posted: Fri Jan 01, 2021 9:49 pm
by spl310
Re: Front brake cylinders
Posted: Fri Jan 01, 2021 9:50 pm
by spl310
Re: Front brake cylinders
Posted: Fri Jan 01, 2021 11:44 pm
by JT68
I believe it was pointed out previously that the roadster hard brake line flares don’t work with jag cylinders.
Re: Front brake cylinders
Posted: Sat Jan 02, 2021 12:32 am
by spl310
Flares are not difficult to do with the proper tool...
Re: Front brake cylinders
Posted: Sat Jan 02, 2021 10:23 am
by JT68
Amateur homemade Brit bubble flairs and homemade SAE double flares are a sure recipe for leaking lines. Certainly would not recommend that.
Pro's know that DIY hand flaring is a complete waste of time, money and are not safe for brake systems. That's why companies build production machine-flared high quality brake lines that fit properly.
Adding Jag calipers and bubble flares is another great addition for "sins of the PO". Besides, if you are going to spend over 5,6,700$ for OE "style" brakes, why not just use parts that fit correctly or upgrade to better calipers and vented rotors?
The 1950's Dunlop system is nothing to write home about, but if you prefer original style brakes, Stainless sleeves work great as well, and are trouble free for as long as the rubber lasts.
Re: Front brake cylinders
Posted: Sat Jan 02, 2021 11:03 am
by 23yrRebuild
All due respect to anyone who advocates production machine quality for any kind of product or part. I'm inclined to agree with you, but I'm almost embarrassed to say that I've made inverted flare brake lines at one time or another, for each of the 30+ old beater cars, and several boat trailers I've owned and operated. I've never had one leak, or fail, after the final tightening of the tube nuts.....not bragging,...but it is so...
I will say, I've never, or would ever, do any work on someone else's brake system, though....
Mike
Re: Front brake cylinders
Posted: Sat Jan 02, 2021 12:19 pm
by JT68
I agree, hand flares can be done, but for each one of yours that was a success, there are probably 5 in the world that leaked-either initially at install or later after 80000... vibrations. The Brit car forums are full of leaking brake line threads. Also the flare nuts have to be excessively tightened to seal poor flares- just a generally bad idea.
I can say “valve jobs are easy with the proper toolâ€, but that is a highly misleading statement....yes, there are plenty of you-tubes showing someone hand lapping their Briggs engine too.
Ask any ASE mechanic if they think a novice rolling your own brake flares is a good idea. It’s not.
Hand making flares is another great “sins of the PO†ugh..
Re: Front brake cylinders
Posted: Sat Jan 02, 2021 2:26 pm
by dynaguy
https://www.eastwood.com/professional-b ... -tool.html
I am fortunate that my Roadster Buddy Bob Haug loaned me this kit. I built all the brake and fuel lines on my sr20 resto-mod with great success. Proving that the kit is "Idiot Proof". Pat
Re: Front brake cylinders
Posted: Sat Jan 02, 2021 2:45 pm
by JT68
So 500$ in cylinders from England and a 200$ flaring tool and then hours to make lines, clean and rebuild and reassemble your calipers?
Looks like a nice tool, but it is still a hand made flare with zero QC.
Re: Front brake cylinders
Posted: Sat Jan 02, 2021 2:47 pm
by zippy67roadster
JT68 wrote: Sat Jan 02, 2021 10:23 am
Amateur homemade Brit bubble flairs and homemade SAE double flares are a sure recipe for leaking lines. Certainly would not recommend that.
Pro's know that
DIY hand flaring is a complete waste of time, money and are not safe for brake systems. That's why companies build production machine-flared high quality brake lines that fit properly.
Adding Jag calipers and bubble flares is another great addition for "sins of the PO". Besides, if you are going to spend over 5,6,700$ for OE "style" brakes, why not just use parts that fit correctly or upgrade to better calipers and vented rotors?
The 1950's Dunlop system is nothing to write home about, but if you prefer original style brakes, Stainless sleeves work great as well, and are trouble free for as long as the rubber lasts.
I don't know about them not being safe as I had flared all of the brake lines on my 67 16500 race car and they have held up for the last 3 race seasons with no leaks. They are put to the test more so on track then on a street car so if they were going to fail the would have on a race car.
Re: Front brake cylinders
Posted: Sat Jan 02, 2021 3:04 pm
by JT68
Have to disagree Bryan, what is acceptable for race cars is not necessarily safe for street cars. Race cars might get driven a few hours before inspections (I don’t know anyone competing in LeMans with a roadster)...street cars have to go 1000’s of miles.
You also (hopefully) don’t have kids crossing in crosswalks on the racetrack.
You guys can do what you want about homemade flares, but I don’t know any pro’s that would recommend them.
There is a point when frugal becomes silly/irresponsible. Brakes on street cars are well past that point.
Re: Front brake cylinders
Posted: Sat Jan 02, 2021 5:15 pm
by Curtis
Zeus is the company that has a prototype 4 cylinder caliper for the roadster at the request of a couple of us. This will be a direct bolt on. Unfortunately they have not been able to get out and do the final test on it due to corona restrictions.
Re: Front brake cylinders
Posted: Sun Jan 03, 2021 8:38 am
by JT68
That would be a much better solution than incorrect Jaguar cylinders and kludged flares.
Re: Front brake cylinders
Posted: Sun Jan 03, 2021 12:15 pm
by Curtis
Yes, bolt it on, hook up the pipe and done. I had to laugh a little because they had to track down a couple roadsters in the UK.
When I spoke with her she told me they still needed to take it to the "motorway" for testing.
Re: Front brake cylinders
Posted: Sun Jan 03, 2021 1:39 pm
by C.Costine
JT68 wrote: Sat Jan 02, 2021 12:19 pm
I agree, hand flares can be done, but for each one of yours that was a success, there are probably 5 in the world that leaked-either initially at install or later after 80000... vibrations. The Brit car forums are full of leaking brake line threads. Also the flare nuts have to be excessively tightened to seal poor flares- just a generally bad idea.
I can say “valve jobs are easy with the proper toolâ€, but that is a highly misleading statement....yes, there are plenty of you-tubes showing someone hand lapping their Briggs engine too.
Ask any ASE mechanic if they think a novice rolling your own brake flares is a good idea. It’s not.
Hand making flares is another great “sins of the PO†ugh..
I doubt that many ASE mechanics are going to approve of much of any DIY repairs. While brakes are of course one of the more vital systems safety wise in the automobile, and they get at least annual inspections, we should probably all curtail our own restoration and repair work outside of perhaps upholstery. There could be safety consequences to a failure in virtually anything else in on or under the car.