Speed 25 brakes adjustment

For Speed 20, Speed 25, 3.5 Litre and Crested Eagle cars
johnlayzell
Posts: 151
Joined: Mon May 21, 2012 2:44 pm
Name: John Layzell

Re: Speed 25 brakes adjustment

Postby johnlayzell » Sat Dec 30, 2017 7:49 pm

Does anybody have for sale any serviceable Speed 25 'Brake shoe adjusting pins - eccentric' as per attached (lower image)?

New from RT they are £64 each!!


Alvis brake shoe adjusting pin - eccentric.jpg
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1925 SC12/50
1937 SP25 VDP Saloon
1970 Peking to Paris Rally VW Beetle

NeilWillatt
Posts: 18
Joined: Sat Jun 16, 2012 7:35 pm
Name: Neil Willatt

Re: Speed 25 brakes adjustment

Postby NeilWillatt » Mon Jan 01, 2018 10:01 am

Hi John, If you have the old ones from which to obtain the dimensions, any half decent metal workshop with a lathe should be able to turn these out for a lot less than £62 !

johnlayzell
Posts: 151
Joined: Mon May 21, 2012 2:44 pm
Name: John Layzell

Re: Speed 25 brakes adjustment

Postby johnlayzell » Wed Jan 03, 2018 8:06 pm

Thanks Neil!

I may have to do just that!

Happy New Year!

Get out there and drive!
1925 SC12/50
1937 SP25 VDP Saloon
1970 Peking to Paris Rally VW Beetle

Delagiste
Posts: 45
Joined: Tue Sep 26, 2017 3:40 pm
Name: David Barker

Re: Speed 25 brakes adjustment

Postby Delagiste » Sat Jan 27, 2018 2:14 pm

We have just done that, had some made. Very reasonable. We have also cleaned up the pins the brake shoes pivot on . And we've put thin bronze bushes in the shoes, all much better now. The shoes have been relined by Saftek with soft green woven linings.
Also we are thinking of putting what are known as "pillow blocks" (Self aligning bearings) in place of the rather nasty angle iron brackets that locate the cross shaft. Has anyone done that? We'll put a new shaft in as well, the old one is really chavelled up at the ends. We are not sure whether the springs on the end of said shaft are supposed to be return springs or just to locate the shaft, any ideas?
Because the car will be used in competition by a family who have never driven a car with a centre throttle we are changing that over as well which means a bit of re-hashing other bits as well.

johnlayzell
Posts: 151
Joined: Mon May 21, 2012 2:44 pm
Name: John Layzell

Re: Speed 25 brakes adjustment

Postby johnlayzell » Tue Feb 27, 2018 8:36 am

David - if you are satisfied with those eccentric pins, would your supplier be willing to make more for you and then send to me as you did with the springs? Same for the thin bronze bushings?

Did you have your drums and linings arced as described here?

https://www.youtube.com/watch?v=H-ZF200ZSVs

Please let us know how you progress with the pillow blocks, cross shaft, etc.

Thanks!
1925 SC12/50
1937 SP25 VDP Saloon
1970 Peking to Paris Rally VW Beetle

Delagiste
Posts: 45
Joined: Tue Sep 26, 2017 3:40 pm
Name: David Barker

Re: Speed 25 brakes adjustment

Postby Delagiste » Tue Feb 27, 2018 5:53 pm

We only cleaned up the brake shoe pivot pins, we didn't have new ones made, then the holes in the shoes were reamed out to a suitable size for pressing in the bronze bush, any competent machinist should be able to do the same. The eccentrics were just cleaned up as well, they were only a bit worn.
The drums have had the lightest of skims and we hope the soft linings will bed in quickly.
One of the guys involved with me in putting the car together has a brother who is a really ace machinist and he does those jobs for us (at mate's rates!)
I'll let you know about the 'pillow blocks' after we have fitted the new cross shaft, not expensive, £40 the pair.The steel tube for the new cross shaft was a helluva lot more!
I think it is more essential to get the brakes absolutely right rather than look for a few more b,h.p. at this stage . After everything has bedded in (including the drivers) we may look to find more power.
It's an SD Speed 20 engine in a Firefly chassis, a project which someone started way back, probably in the 1980s and then lost interest, it came to us from the U.S. via Holland.

Delagiste
Posts: 45
Joined: Tue Sep 26, 2017 3:40 pm
Name: David Barker

Re: Speed 25 brakes adjustment

Postby Delagiste » Thu Mar 01, 2018 10:27 am

Hi John, it appears that we could make some of the eccentric shoe adjusters, do you still want some? Or does anyone else who reads this? The same could go for the brake shoe pivot pins. If there was a reasonable demand my machinist mate would probably knock some up at a reasonable price.

johnlayzell
Posts: 151
Joined: Mon May 21, 2012 2:44 pm
Name: John Layzell

Re: Speed 25 brakes adjustment

Postby johnlayzell » Thu Mar 01, 2018 9:04 pm

Possibly, depending on what is that reasonable price!

I'm beginning to believe that my under par braking is primarily as a result of not having my relatively new brake linings properly arced.

More on brake arcing here: https://www.youtube.com/watch?v=H-ZF200ZSVs
1925 SC12/50
1937 SP25 VDP Saloon
1970 Peking to Paris Rally VW Beetle

Delagiste
Posts: 45
Joined: Tue Sep 26, 2017 3:40 pm
Name: David Barker

Re: Speed 25 brakes adjustment

Postby Delagiste » Fri Mar 02, 2018 2:22 pm

I will let you know a.s.a.p.

Delagiste
Posts: 45
Joined: Tue Sep 26, 2017 3:40 pm
Name: David Barker

Re: Speed 25 brakes adjustment

Postby Delagiste » Wed Mar 21, 2018 3:49 pm

[http://oi66.tinypic.com/2cqb6sh.jpg][/img]
Sorry! It's supposed to be a photo, but it hasn't worked!
Last edited by Delagiste on Wed Mar 21, 2018 4:00 pm, edited 1 time in total.


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