Dual 7" Servo - Page 20

Chris Cussen · #1 20th February 2012, 06:39

OK I see the difference.
However neither mashtun nor I have fitted the 'deceleration valve' and neither of us have rear wheel lock up problems.

peterux · #2 20th February 2012, 07:58

Quote:

Originally Posted by Chris Cussen

OK I see the difference.
However neither mashtun nor I have fitted the 'deceleration valve' and neither of us have rear wheel lock up problems.

Sorry Chris, I can't answer that one!

Grey V8 Pete · #3 20th February 2012, 20:45

Well, after a number of delays and a couple of maintanance repairs on the way, my servo is finally in and the car driven today at last. WOW! I now have the brakes that I thought I should have had all along! I have a 23mm dia master cylinder but, much the same as other’s posts, braking is progressive and the car really feels as though it is going to stop. Pedal travel is now longer but the effort required is much reduced and stopping distance seems unbelievably short. Even with heavy braking there is no sign of any tendency to lock up unexpectedly. A slight pull to one side means a bit more bleeding is required before attempting a full “lock up the wheels” test. I also want to see how the braking behaves on a wet surface as I suspect everyone so far has tried the servo out on dry roads?

So a really big thank you to Mike and Jason for making this upgrade possible and for the benefit of so many owners too. Peter.

denniswpearce · #4 21st February 2012, 16:45

Congratulations Robin and Pete,

Its good to have nice brakes isn't it ?

Dennis

andrew curtis · #5 25th February 2012, 14:43

Have just put car on rolling road , Its registering 75% efficiency, a good car would expect to be around 60% ,the fail is about 48% and my sportster was 50%+ at last MOT

denniswpearce · #6 25th February 2012, 15:39

So you are one happy bunny as well. Congrats.

Mike · #7 6th March 2012, 16:13

Dave Cunnington - the MOC editor is short of material for the Pitstop this month, so I have penned a short follow up to the Dual 7" Servo article we began in the last issue, reflecting on the success enjoyed by those who have compared the "before and after" experience.
If anyone has any good photos of the kit fitted in your car, I am sure Dave would be pleased to receive it to go along with the article.
regards
Mike

Mike · #8 8th March 2012, 21:32

I've had a couple of guys express an interest in a Dual 7" servo following the last project. Duksville still do not have any in stock, so I was wondering if there are a few more interested in one of these units, and shipping another half dozen units from MBM again?

Any one interested, or are we all done?

Grey V8 Pete · #9 1st April 2012, 22:38

Quote:

Originally Posted by Mike

I've had a couple of guys express an interest in a Dual 7" servo following the last project. Duksville still do not have any in stock, so I was wondering if there are a few more interested in one of these units, and shipping another half dozen units from MBM again?

Any one interested, or are we all done?

Hi Mike. Maybe wait until other members have had a chance to see them installed in our cars at Stoneleigh and also seen our smiling faces :-)

jrclem · #10 6th April 2012, 11:22

Please put me down on your list for a new brake upgrade sero, Have read all the reports in Pitstop and looks like one of great modification.

john

oaktree11 · #11 9th March 2012, 14:43

Mike,

What happened to "never again"!....

John

MartinClan · #12 1st April 2012, 20:38

Well - car passed the (first) MOT fine on Saturday with the new brakes. Rather startling to see how much the front suspension now flexes given that the brakes have some serious stopping power.

Went for the first long drive today and you rapidly get used to not having to book braking in advance....

Robin

Patrick · #13 17th April 2012, 13:20

They'll deal with importing and selling is what I get from it - wonder what the unit price will end up as.

denniswpearce · #14 17th April 2012, 15:24

I think Mark is seeking to make sure you are happy for him to import these servo's, as you up to now have been the sole importer for Marlins for these units.
Each of us has been responsible for our own installations and testing but Mark, once he imports them and markets them via Marlin, will be responsible in law for their suitablility for the cars he sells.
Thats my take on it.

As Nigel says, you should count this as a great success to which we are all indebted to you.

Grey V8 Pete · #15 17th April 2012, 18:46

I agree with Dennis above. I am planning to visit Mark and let him have a play with my Dual Servo'd Hunter just as soon as I can fix an ongoing misfire problem on the V8. Currently waiting for a new Ignition amplifier!

peterux · #16 18th April 2012, 07:21

I agree, I think Mark is just establishing the fact that he wants to import and sell directly to customers than via you. I think this is what you wanted anyway?
If Mark is smart (which I think he is) he has spotted a bigger market in the UK Kitcar scene. This is full endorsement that he wants to supply new customers so he is obviously impressed.

BTW there is now a US supplier on eBay that will ship direct to the UK...

http://www.ebay.co.uk/itm/3208654336...1#ht_500wt_969

Not a bad price as it includes a clevis adapter and an extended pin. Of course, you'll have to add import duty at 20%(I think). And it doesn't include you great m/C adapter plate.

(BTW2 - my own servo upgrade is now in process. Servo and M/C is bolted in. Need to make up my extended pin and do the plumbing/bleeding, etc)

Mike · #17 18th April 2012, 08:34

Quote:

Originally Posted by peterux

I agree, I think Mark is just establishing the fact that he wants to import and sell directly to customers than via you. I think this is what you wanted anyway?
If Mark is smart (which I think he is) he has spotted a bigger market in the UK Kitcar scene. This is full endorsement that he wants to supply new customers so he is obviously impressed.

BTW there is now a US supplier on eBay that will ship direct to the UK...

http://www.ebay.co.uk/itm/3208654336...1#ht_500wt_969

Not a bad price as it includes a clevis adapter and an extended pin. Of course, you'll have to add import duty at 20%(I think). And it doesn't include you great m/C adapter plate.

(BTW2 - my own servo upgrade is now in process. Servo and M/C is bolted in. Need to make up my extended pin and do the plumbing/bleeding, etc)

All,
Maybe I am a little sensitive to this project having put so much time into it, but I don't think Mark has even bothered to fit it to Marlin's own demonstrator and test it. There is no feedback from him at all - he simply refers to what he is being told. On top of that his opening paragraph is so negative to the point of being critical, which does not sit well with me.Part of me feels like telling him to whistle.............

That said, I have no desire to get involved in importing on speculation and carrying stock, so it would be nice if he does adopt the kit and make it available to future owners.

Patrick mentioned what price Marlin may wish to charge? - that is clearly up to Marlin. They have a business to run, whereas my aim was to keep the costs as low as possible for as many as possible. Having said that, I have made every effort to make this kit known to all potential Marlin Owners Club members, so anyone who arrives late to the party will have to accept Marlins commercial rates. Of course the check to their price being too high is that the servo is well documented within the club and it will be possible to import single units individually.

On that subject, may I offer a little warning.
UK import duties are 5% on servos, and VAT is levied at 20% of the landed UK cost, ie. including freight to UK. So you can see from Peters highlighted ebay source it gets very expensive. Then Parcelforce will charge an additional £13 fee for paying the UK import and VAT at customs on your behalf. This is why it is important to bring a decent sized batch to benefit from a freight forwarding agent to keep these costs down.

Regards to all
Mike

Mike · #18 18th April 2012, 08:39

Quote:

Originally Posted by peterux

(BTW2 - my own servo upgrade is now in process. Servo and M/C is bolted in. Need to make up my extended pin and do the plumbing/bleeding, etc)

Peter

Its good to hear you are making progress with your servo now that you have successfully installed your beast of an engine!

I hope you will as pleased with your new found brakes. Sounds like you will need them!!

Mike

peterux · #19 18th April 2012, 20:06

Quote:

Originally Posted by Mike

Peter

Its good to hear you are making progress with your servo now that you have successfully installed your beast of an engine!

I hope you will as pleased with your new found brakes. Sounds like you will need them!!

Mike

OK, so here's an update of my installation.
You've all seen it all before so I'll try to focus on my own installation differences and ideas.

Here is the new dual diaphragm servo installed with Mike's adaptor plate. This made fitting the Ford M/C a doddle.
I was lucky that my original reservoir pipes were long enough. I good tip I got from Robin was to use the BMW rubber seals on the m/c. One of my front brake pipe was long enough to be reformed to reach the new position. The other was extended alongside of the servo.

Brake Servo Upgrade by marlinpeter, on Flickr

This is a Residual Pressure Valve that I have fitted as I have rear drum brakes. These should not be used if you have disk brakes at the back. The Servo supplier recommends fitting one of these if you have drums at the back and disk brakes at the front.

Brake Servo Upgrade by marlinpeter, on Flickr

As you all know, you have to extend the plunger that goes into the m/c. This is my version using a M6x40mm button head screw and a short length of M6 threaded tube that I bought for £1.50. No lathe or drilling, just bolt it together. This picture is with the brake pedal fully depressed so that I could get to the locking ring.

Brake Servo Upgrade by marlinpeter, on Flickr

With my failing eyesight and vari focals I can't see much close up in the foot-well. Most of this was assembled by feel and I use my digital camera to check everything is installed correctly. The servo clevis is alongside the brake pedal as that is how Marlin designed the Sportster pedal box. I should have modified the brake pedal to move it across but the bolt holding the pedal does not come out in situ so that would mean removing the whole pedal box which I decided was overkill. I think it will be fine like this. This picture is with the brake pedal fully depressed.

Brake Servo Upgrade by marlinpeter, on Flickr

The next picture is with the pedal in its normal rest position. I set the clevis pin up at the same dimension as the old metro servo and extension which in my case was 130mm. I shortened the clevis pin coupler by about 20mm as it was too long under full compression.

Brake Servo Upgrade by marlinpeter, on Flickr

I've made some brackets to support the pipes hanging in free air which are being painted before final fitting. Then I've got to refill and bleed the system.
I need to wheel the car out the garage to be able to get to each wheel for bleeding so it won't be until it stops raining!!

MartinClan · #20 19th April 2012, 14:10

Quote:

Originally Posted by peterux

With my failing eyesight and vari focals I can't see much close up in the foot-well. Most of this was assembled by feel and I use my digital camera to check everything is installed correctly.

Aha - I'm glad I'm not the only one. I blame it on computers.....

Robin