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Home Page: charles durning   Silver Member USA
Magee, MS, USA

Total Posts: 17 Latest Post: 2018-02-06
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DIY MGB Rear Disc Brakes Part 2 240SX Caliper

charles durning   Silver Member USA — Posted on The MG Experience
Tuesday January 30, 2018 7:23 AM


240sx adapters

240sx adapters

lefr bracket 1

lefr bracket 1

left bracket

left bracket

park brake cable attachment clearance

park brake cable attachment clearance

right side rough cut 1

right side rough cut 1

right side rough cut

right side rough cut




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Member Comments on Journal Entry: DIY MGB Rear Disc Brakes Part 2 240SX Caliper   ↵

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CAD Drawing For The Caliper Bracket

charles durning   Silver Member USA — Posted on The MG Experience
Wednesday January 10, 2018 1:35 PM


CHARLIE PART 5 Dec 23 003 Layout1

CHARLIE PART 5 Dec 23 (003).Layout1

IMG 1955

IMG 1955




Member Comments on Journal Entry: CAD Drawing For The Caliper Bracket   ↵
Rated 7 out of 10 based on 1 ratings
2018-01-19 16:40:41 # 47969
Comment by Bob Harper
Rating: 7/10
These brackets look simple enough. 2D from flat plate.Cad isn't too difficult to learn and you can get LibreCAD or FreeCAD and draw these with a little experience. Then modifying them will be easy. AutoCAD is a great program but way too expensive for common use. There are more free or user priced CAD programs out there depending on what platform you use, Linux, Apple, or Other. Thanks for the share.Bob - 1971 MGB-GT
2018-01-20 04:59:26 # 47985
Comment by charles durning
Bob,Thanks, I'll look into that. It's frustrating trying to find someone who is willing to help, even if I pay them.
2018-01-21 16:01:06 # 48003
Comment by Bob Harper
Not looking for payment. If I can help my email is bobharper (at) bigpond.comI am interested in the mod and would consider doing the same to my 1971 MGB-GT. It was a US delivered car that has been converted to RHD for Aus by changing US parts to Aus parts.I also have Lathe and Milling machine, but old eyes.
2018-01-21 21:01:12 # 48008
Comment by Bob Harper
Details received. I'll see what I can do this week. It loaded up into LibreCAD without any issue, so editing shouldn't be an issue. I'll see if a friend can advise if I need anything special for a water cutter pattern, or flame cutter etc. Holes may be best drilled for precision.CNC cut is also an option.
2018-01-22 04:51:23 # 48012
Comment by charles durning
Bob,Thanks that will be a huge help
2018-02-01 14:35:55 # 48208
Comment by charles durning
Bob,I misplaced your e-mail. I finally got a chance to trace out the bracket and add in the radius values for the bolt holes without all of the other clutter. Please send me an e-mail and I'll send the tracing.

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A cover

A+ cover

IMG 1901

IMG 1901

IMG 1917 small

IMG 1917 small

IMG 1916 small

IMG 1916 small

kit

kit

IMG 1915 small

IMG 1915 small




Member Comments on Journal Entry: Add A Chain Tensioner To A Series Engines   ↵
2017-11-26 12:14:50 # 46349
Comment by Mike D
What do you call they tensioners they fitted toA-Series engines from day one please Charles?
2017-11-26 12:35:33 # 46351
Comment by charles durning
Mike,The original was 2 O-rings on the cam sprocket. It was not very effective.
2017-11-26 16:54:27 # 46379
Comment by Gene Johnson
Great job! I was expecting a need to use a different, A+, front plate.Couple of questions:1) How did you address the fan/breather interference? (I trimmed the breather ant an angle and welded on a patch) I'm looking for a better solution for my new A+ cover.2) It appears you used a simplex chain; I want to use a duplex and vernier cam sprocket. I've read of various other fit conflicts. Do you envision any?
2017-11-26 19:20:27 # 46385
Comment by charles durning
Gene,It is a simplex chain. There is an issue with the duplex chain touching the A+ cover. I have read that the cover can be modified with a BFH for clearance. For details on the duplex chain, I would contact the Mini guys. The breather on my cover is oval shaped so there is no issue with fan clearance.
2017-11-27 02:22:56 # 46428
Comment by Mike D
What do you call what we call O-Rings please Charles. Our O-Rings have a circular cross section to the rubber.
2017-11-27 04:54:48 # 46432
Comment by charles durning
Mike,Look at Item 69. Those are called tensioner ring. Those rings were eliminated in the A+ engine
2017-11-27 11:20:23 # 46436
Comment by Mike D
I'm hoping to learn what you call what we call O-rings Charles.Our A series tensioners are nothing like what we call O-Rings.
2017-11-27 12:29:16 # 46438
Comment by charles durning
Mike,I see the link did not work. Go to Moss Europe a d bring up the internal parts for a 1098 engine. In that illustration there are 2 rubber rings (#69) next to the cam sprocket. Those are rubber O-rings that ass tension to the timing chain.

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MGB DIY Rear Disc Brakes

charles durning   Silver Member USA — Posted on The MG Experience
Thursday September 28, 2017 7:53 AM


laser cut bracket

laser cut bracket

IMG 1826

IMG 1826

IMG 1872

IMG 1872

IMG 1875

IMG 1875

IMG 1874

IMG 1874

IMG 1894

IMG 1894

assembled

assembled

drawing changes

drawing changes




Member Comments on Journal Entry: MGB DIY Rear Disc Brakes   ↵
Rated 9 out of 10 based on 1 ratings
2017-10-02 10:17:37 # 44879
Comment by M K
Looks like a great setup, is that a 240sx caliper?If you make a batch of brackets to sell, I'll buy a pair for sure.
2017-10-02 10:46:59 # 44880
Comment by charles durning
That is a 2002 Nissan Sentra rear caliper. I chose it because it was available cheap for mock up purposes and has a similar bore to the 240SX. The rotor I'm using is from a 1994 Honda Accord. The rotor has a deep enough offset to eliminate any spacers and still use a flat caliper mount bracket. The shims shown in the pics are only for proof of concept. The finished bracket will mount flush with the flange on the axle housing.I would think that the 240SX rear caliper would work just fine provided you use the caliper with a 34MM bore. There are some 38MM bore 240SX calipers out there that may be too much power to keep the car in balance.I'll post my progress here. I may not be making brackets for sale. I'll see. However, I'll be happy to provide files that can be fed into a laser cutter so you can make them locally.
2017-10-03 15:09:44 # 44931
Comment by Eric Pyle
I'd be interested in the files, for sure.
2017-10-03 15:11:58 # 44932
Comment by M K
Thanks for the additional Info on the setup, I hope the results work great, as I'd be very interested in some Nissan rear brakes.
2017-10-03 15:16:39 # 44933
Comment by Eric Pyle
Is it a rear or front rotor from an Accord that you are using?
2017-10-03 20:49:18 # 44942
Comment by charles durning
The rotor is rear from the Accord. The pilot in the rotor will have to be opened in order to fit flush against the axle flange. Not an issue, easy to do.First test fit of the laser cut bracket and I found one hole about .015" out of place. It's actually usable as is with that hole opened up a little. I'll get that corrected on the drawing. Didn't have time to do much, just clean up the holes. Hopefully I'll get all test fitted to my spare axle this weekend. I'll post here when I'm satisfied with the bracket. Then I'll make the drawing available.
2017-10-09 13:17:45 # 45040
Comment by rick axmear
Comment by axmanCertainly would be interested in the cad drawing.
2017-10-09 14:00:37 # 45041
Comment by charles durning
Rick, the initial fit of the prototype steel bracket fits. The only issue I see right now is the junk yard rotor is slightly smaller that the specs for a replacement rotor. The junk yard totor measures 10.1875 whereas the specs on a replacement rotor is 10.223. I'll double check the specs when the new rotor arrives tomorrow. I was unable to find a rotor that matches the sample I have exactly. It might be a misprint in the spec manual. There are options such as turning down the OD of a new rotor or using a Toyota rotor with about .050 less offset to get an acceptable OD. Shimming the caliper out by .050 is not a problem. Keep an eye here for an update.If you like, PM me your e-mail address and I'll send you the file.
2017-10-10 20:55:36 # 45113
Comment by charles durning
Just opened the new rotors. They are the same OD as the junk yard rotors. I'll get everything fitted on my spare axle in a week or so.
2017-10-21 20:09:26 # 45314
Comment by charles durning
I updated in the Performance forum
2017-10-29 07:47:54 # 45530
Comment by charles durning
Got the park brake linkage worked out on my spare rear axle. I would have preferred to use 240SX levers on the calipers but couldn't find any. I ended up modifying the Sentra levers. I also worked out a process for shortening the cables. Details on the Performance forum.
2017-11-24 10:27:52 # 46225
Comment by Ron Walsh
Rating: 9/10
I like what you have done here. I am planning on using your write up as a guide for putting on the Honda Prelude calipers I picked up. I am still trying to figure out how to mount the calipers on the leading side of the rotor, but I know I can make them work on the rearward side of the axle. Thanks for the great writeup.
2017-11-24 13:31:41 # 46227
Comment by charles durning
Ron,If you would, i have started a rear disc brake thread on the Performance forum. Let us know how it works out for you. I would like to know.If you PM me your e-mail address I''ll send a PDF of the CAD Drawing as well as a drawing that can be printed full size for mock up purposes
2017-12-16 19:11:19 # 46987
Comment by Chris W
Interesting. Looks like this is much easier on the bench than under the car.So the Ebrake is activating the main caliper. You would probably know that the Scarebird kit uses a separate, mechanical caliper on the other side of the rotor.I'm happy with the separation of powers and I can appreciate the compactness of the system you are using but do you have any other compelling reasons why you are going the single caliper route?
2017-12-16 19:14:09 # 46988
Comment by Chris W
One aspect that does appeal to me is the way it appears the ebrake is positively released. I assume that big coil spring is part of that system.
2017-12-16 19:16:45 # 46989
Comment by Chris W
The idea that the ebrake on the Scarebird system does not have a strong release mechanism is causing me some issues. A strong release spring in the ebrake system is something that I think would be of benefit.
2017-12-16 20:17:24 # 46992
Comment by Eric Pyle
My Ford Contour (1995) used the main rear pads as the eBrake, which led to some problems and consequent TSBs, including an arctic-grade cable and lube and a very large lever spring on the top of the caliper where the cable connected. This was Ford's solution to a freezing in place problem when it was cold outside. With the big spring and a cable that did not freeze, all was well.
2017-12-17 04:33:21 # 47002
Comment by charles durning
Chris WThe reasons I went this way is it's simple, easy, uses common parts, and inexpensive. No other reason. There are many ways to install rear disc brakes. This is just the way I have chosen.BTW I'm having the bracket redrawn to have 1 hole moved slightly. I am also working out the details to install a 240SX rear caliper in the rear. Though the 240SX is not as straight forward as the Sentra caliper, it does add the option of adapting calipers with both a 38mm and a 34mm bore. Another benefit of the 240SX caliper is there is no need to modify the park brake lever. I should have that adapter drawn up next week. Though the Sentra caliper adaption is effective I believe the GT could use a little more rear bias. If one of my buddies wants to be adventurous I'll see how the Sentra conversion works out on a roadster.
2017-12-17 17:36:20 # 47011
Comment by rick axmear
Hi Charles,Is the lazer file for the caliper bracket the same one as you originally had or has it changed. You sent me a early file where the one hole needed to be enlarged. If it is new I to would sure like to have the new file. I have the ability to cut the brackets.Thank youRick AxmearAxman-carsonland2@charter.net
2017-12-17 18:34:17 # 47014
Comment by charles durning
Rick,The hole I am having moved is to re-position the caliper slightly. If you measure from the center of the large opening to the center of each caliper mount hole there is one that is about .020" closer to the center. That is the hole I'm having moved out to be equal with the hole that is farther out. That dimension should be, IIRC, 3 11/16" (I don't have the drawing in front of me). I hope to have the drawing back in the middle of the week. If I don't get back to you by then, rattle my cage.Either way the caliper fits fine and does not cause any issues. I just know it can be better.I'll post my results for adapting the 240sx caliper to the Sentra bracket once the concept is proven.
2017-12-18 08:37:21 # 47027
Comment by charles durning
Rick,I have posted a new drawing for the caliper bracket showing the changes in hand written notes. The bracket fits and works as is. The changes are to clean up some minor details

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A Better Fuse Block

charles durning   Silver Member USA — Posted on The MG Experience
Monday April 3, 2017 8:28 AM


fuse block

fuse block

adaptor terminal

adaptor terminal

IMG 1598

IMG 1598

IMG 0745 2

IMG 0745[2]

IMG 0746 1

IMG 0746[1]




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Member Comments on Journal Entry: A Better Fuse Block   ↵
2017-04-09 10:09:45 # 41515
Comment by Jim Baumberger
I also installed an ATC fuse box on my B GT after going through two of the original types from the usual suppliers. Mine isn't a show car; just a reliable driver, so I have no problem with using later non-original components. Wish the suppliers would offer a better quality original-type fuse box or an ATC type that mirrors the original setup.
2017-04-09 12:25:05 # 41516
Comment by charles durning
Yep, seems it would be easy enough ti hide ATC fuses inside of the original looking box. Until someone does I will continue with the ATC fuse box I can find.

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Throttle Shaft Bushing Solution

charles durning   Silver Member USA — Posted on The MG Experience
Thursday November 24, 2016 9:49 AM


IMG 0721 1

IMG 0721[1]




Member Comments on Journal Entry: Throttle Shaft Bushing Solution   ↵
Rated 7 out of 10 based on 1 ratings
2016-11-29 12:22:14 # 38759
Comment by Tim G
Same wear on mine...nice solution.
2016-11-29 12:22:45 # 38760
Comment by Tim G
Rating: 7/10
Same wear on mine...nice solution.
2016-11-29 12:40:56 # 38762
Comment by charles durning
Tim,It made all of the difference in the world for me. It's been in there for about 3 years with no ill effects. IIRC the nylon bushing was for the automagic shift linkage on a GM car.

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