Brake Booster Taimar
Discussion
Dear all,
just got the new brake booster from TVR Parts. The new one is a bit smaller (less diameter) and the rod is shorter which means that the brake lights are burning permanently.
Does somebody have the same experience and solved the brake light problem or did they simply delivered the wrong booster?
Thanks a lot for your hints
Ralph
just got the new brake booster from TVR Parts. The new one is a bit smaller (less diameter) and the rod is shorter which means that the brake lights are burning permanently.
Does somebody have the same experience and solved the brake light problem or did they simply delivered the wrong booster?
Thanks a lot for your hints
Ralph
Edited by PelleTVR on Wednesday 15th August 14:18
How much to short is it?
You must have had to depress the pedal from it’s parked position to connect it which means the switch activated, but also your peddle will sit lower than normal?
There is a 10 mm packer/spacer on the bulkhead that could be adjusted, but that’ would be a bodge, or could you extend the connecting piston?
You must have had to depress the pedal from it’s parked position to connect it which means the switch activated, but also your peddle will sit lower than normal?
There is a 10 mm packer/spacer on the bulkhead that could be adjusted, but that’ would be a bodge, or could you extend the connecting piston?
Hi GAjon,
not sure having everything well understood. Pedal box looks similar. Due to the shorter rod the pedal is closer to the bulkhead (released position). Consequently the pin of the switch is almost completely released resulting in switching on the brake lights.
To tinker something between the rod and the pedal would be possible.... But I hope not being the only one who bought this booster at TVR Parts.
not sure having everything well understood. Pedal box looks similar. Due to the shorter rod the pedal is closer to the bulkhead (released position). Consequently the pin of the switch is almost completely released resulting in switching on the brake lights.
To tinker something between the rod and the pedal would be possible.... But I hope not being the only one who bought this booster at TVR Parts.
I don’t think the switch shown is that dissimilar to the original, the bigger issue for me would be the fact the peddle is being prevented from being in its parked position because the servo piston rod is shorter than original.
It should fit without having to adjust anything else.
It should fit without having to adjust anything else.
Edited by GAjon on Thursday 16th August 08:30
The originals are obsolete however what they have supplied you can weld on extensions to the new one to fit
https://tvr-parts.com/tvr-parts/part-details/tvr-1...
Like many things from some TVR suppliers the more than often need some work to make them fit or they call them modified versions.
Andrew
https://tvr-parts.com/tvr-parts/part-details/tvr-1...
Like many things from some TVR suppliers the more than often need some work to make them fit or they call them modified versions.
Andrew
Edited by Andrew Gray on Thursday 16th August 21:23
Cannot agree!
What they have supplied is unacceptable.
Their adverts says genuine TVR parts
It says fits TVR M series.
Nowhere does it say you have to weld an extension on the piston, a task beyond most hobbyists anyway!
This is a brake system main component not furry dice for the rear view mirror!
It may well work when modified, no problem with that, but the description should detail what is required to make it fit and operate correctly as a substitute part.
I personally, if I had to fit one of these would look at making a mechanically fastened extension rather than risk the chance of damage to the internal seals through heat transfer from welding.
What they have supplied is unacceptable.
Their adverts says genuine TVR parts
It says fits TVR M series.
Nowhere does it say you have to weld an extension on the piston, a task beyond most hobbyists anyway!
This is a brake system main component not furry dice for the rear view mirror!
It may well work when modified, no problem with that, but the description should detail what is required to make it fit and operate correctly as a substitute part.
I personally, if I had to fit one of these would look at making a mechanically fastened extension rather than risk the chance of damage to the internal seals through heat transfer from welding.
Thanks to all,
I agree, welding or doing other "improvements" related to the brake system should be avoided...
The switch would not help because the pin has the same length... Iam going to extend the pin using a cap or something else. Or I try to bend the bracket.
The position of the pedal is not an issue, the feeling is not different and full braking is still possible.
I agree, welding or doing other "improvements" related to the brake system should be avoided...
The switch would not help because the pin has the same length... Iam going to extend the pin using a cap or something else. Or I try to bend the bracket.
The position of the pedal is not an issue, the feeling is not different and full braking is still possible.
Problem lies i believe is that TVR List the item as all M Series Alan.
There are two types the early one which fits Vixen and early M the later M Series cars which the Taimar is will need the later type.
No matter what supplier you go to you will not find the later type new from my experience unless that has changed.
When we re built the Taimar for my brother i refurbished the old one as even the second hand ones i could find where not in as good a shape as the one i had.
Andrew
There are two types the early one which fits Vixen and early M the later M Series cars which the Taimar is will need the later type.
No matter what supplier you go to you will not find the later type new from my experience unless that has changed.
When we re built the Taimar for my brother i refurbished the old one as even the second hand ones i could find where not in as good a shape as the one i had.
Andrew
Hi Andrew,
i see what you mean 2 different types. Is it possible to use the original rod in the new one.
A few years ago i had a 1990 TVR S3 and the servo looks the same. The servo had a sticker on it saying "Ford Fiesta". Is that a possible replacement.
I wonder whats on my 3000S or 3000M.
Alan
i see what you mean 2 different types. Is it possible to use the original rod in the new one.
A few years ago i had a 1990 TVR S3 and the servo looks the same. The servo had a sticker on it saying "Ford Fiesta". Is that a possible replacement.
I wonder whats on my 3000S or 3000M.
Alan
First, thank you for the discussion. Just to summarize my findings:
The brake booster supplied by TVR Parts is smaller than the ones fitted in my Taimar and 3000S. Reading the TVR Parts description this 6" booster should be the genuine one.
I think that at least in my late TVR M (79 and 80) the booster belongs to the TR6. Nevertheless, the 6" fits although the brake pedal comes closer to the bulkhead (almost at the same level as the gas pedal) as a result of the shorter push rod. The bracket of the brake light switch needs to be adapted accordingly (by bending it).
The "brake feeling" is more "soft" but at the end full braking is possible. I guess (I did not compare it) that the rod going into the brake cylinder could be shorter as the one of the larger TR6-booster, too, meaning that the way of the rod into the cylinder might be shorter but still enough to allow wheel blockage.
I did some test drives and I decided to keep the TVR Parts booster. However, my recommendation is to took the TR6 booster into consideration if somebody needs to replace it. I do final comparison with a TR6 one this week when visiting a classic car garage.
The brake booster supplied by TVR Parts is smaller than the ones fitted in my Taimar and 3000S. Reading the TVR Parts description this 6" booster should be the genuine one.
I think that at least in my late TVR M (79 and 80) the booster belongs to the TR6. Nevertheless, the 6" fits although the brake pedal comes closer to the bulkhead (almost at the same level as the gas pedal) as a result of the shorter push rod. The bracket of the brake light switch needs to be adapted accordingly (by bending it).
The "brake feeling" is more "soft" but at the end full braking is possible. I guess (I did not compare it) that the rod going into the brake cylinder could be shorter as the one of the larger TR6-booster, too, meaning that the way of the rod into the cylinder might be shorter but still enough to allow wheel blockage.
I did some test drives and I decided to keep the TVR Parts booster. However, my recommendation is to took the TR6 booster into consideration if somebody needs to replace it. I do final comparison with a TR6 one this week when visiting a classic car garage.
Edited by PelleTVR on Monday 20th August 16:12
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