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#1
10th June 2011, 09:54 PM
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Fit normal m/cyl and system and if needed a pressure reducer valve in the rear line or alter rear cylinder sizes to suit.
__________________
Cost : Little as possible. Thanks : To those who by their generosity my build has progressed. Its a handmade sports car not a flaming kit car !!! If at first you dont succeed,avoid skydiving... No parachute require to freefall,only if you want to do it twice. 
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#2
10th June 2011, 10:04 PM
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Is that method ok with sva? How would that affect an mot brake test where they are looking at braking efficiency as a percentage related to axle weight?Or am I reading to much into this and its not really an issue?
Views Bob
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#3
10th June 2011, 10:35 PM
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If I recall ashg changed his rear wheel cylinders after his first iva test.To change the brake distribution.
I may be wrong though.
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#4
11th June 2011, 08:10 AM
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As Steve says a few have done this and passed IVA,Spuds car has a standard setup and went through fine,Sierra m/cyl and disc/caliper front and 10 in drums rear,as far as I remember no reducer valve.
If they use a roller brake tester with axle weighing facility (and I am fairly sure they all do)there are calculations as to weight and balance and pedal force used. Someone who has a car passed will tell you better and I think Adrian H has put this on the forum previously.
__________________
Cost : Little as possible. Thanks : To those who by their generosity my build has progressed. Its a handmade sports car not a flaming kit car !!! If at first you dont succeed,avoid skydiving... No parachute require to freefall,only if you want to do it twice.
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#6
11th June 2011, 08:35 AM
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Comes down to balance from front to rear,the donor weighs possibly three times the weight of the roadster so its pro rata in braking force and it will be overbraked so you may need a reducer in the rear or the dreaded balance bar.
The race car I have built has a twin cylinder balance bar setup and is proving to be a pain at the moment to setup but hopefully wednesday will sort it at the track. Once you have it all up and running find a friendly MOT station with ATL and you will get some idea of the forces involved. ATL will weigh axles and give brake force in kilo's and some idea of split front to rear.
__________________
Cost : Little as possible. Thanks : To those who by their generosity my build has progressed. Its a handmade sports car not a flaming kit car !!! If at first you dont succeed,avoid skydiving... No parachute require to freefall,only if you want to do it twice.
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#7
11th June 2011, 08:42 AM
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That has to be a good case to try the load compensating valve. They have a simple drop rod attached to lower wishbone that is fully adjustable.So you could in fact test system on any mot station rollers before going to iva.Brake lockout on rolling roads is a major problem and changes with different tyre compounds so in theory that might be the answer.They wont look at it as somthing alien as its fitted to dozens of cars.One other thing that comes to mind is the use of braided brake hoses, i have built several kit cars and on one occasion i was failed at a test station because the brake hoses did not carry a bs number. Is this still the case or did i just come across a complete twat?
Bob
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#9
11th June 2011, 09:34 AM
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Don't folk use the Sierra's brake valve thingy found on the bulkhead anymore?
 I thought it got mounted down in the tunnel at a certain angle to do that "don't lock the arse end up please bit".. Last edited by MarkB : 11th June 2011 at 09:43 AM.
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