Racing Pedal box
Discussion
why do most race cars have a racing pedal box with no servo?
I have just bought a golf mk gti to race and it has no servo, just abrake bias pedal box with seperate cylinders for the front and rear.
Should I fit a servo or keep with the pedal box, want to race it on the track and sprint / hill climb events.
I have just bought a golf mk gti to race and it has no servo, just abrake bias pedal box with seperate cylinders for the front and rear.
Should I fit a servo or keep with the pedal box, want to race it on the track and sprint / hill climb events.
Sam_68 said:
If you have separate cylinders for front and rear, you would need twin servos (or else fit the servo on the front circuit only and adjust the bias to suit).
Most race cars have unservo'ed brakes because:
1) Servos are extra weight
2) Pedal feel is better without a servo and it is easier to modulate the brakes for heel-and-toe gear changes.
3) Most racing drivers are men, not girls or limp-wristed wusses, therefore they have leg muscles that are capable of stopping the car without vaccuum assistance.
Unservo'ed bias pedal box with twin m/c should be fine, once you get used to the increased pedal pressures. I'd leave it as it is, personally.
Most race cars have unservo'ed brakes because:
1) Servos are extra weight
2) Pedal feel is better without a servo and it is easier to modulate the brakes for heel-and-toe gear changes.
3) Most racing drivers are men, not girls or limp-wristed wusses, therefore they have leg muscles that are capable of stopping the car without vaccuum assistance.
Unservo'ed bias pedal box with twin m/c should be fine, once you get used to the increased pedal pressures. I'd leave it as it is, personally.
Thanks for the advice. What set up (bias front / rear) would you recommend as a starting point, should it be more to the front then the rear?
thanks for everyones help, some very sound advice.
I think one of the big problem's is that this is the first car I have owned without a servo/assistance so i'm sure its just me not being used to them. However, you have to stamp on it hard just to get the car just to stop normally - does not give much in the way of confidence.
I obviously need to look at the set up.
I think one of the big problem's is that this is the first car I have owned without a servo/assistance so i'm sure its just me not being used to them. However, you have to stamp on it hard just to get the car just to stop normally - does not give much in the way of confidence.
I obviously need to look at the set up.
Sam_68 said:
Just a thought, Simon, but do you know what pads the car is running?
Some race pads give bugger all braking effort until they are up to temperature; the more extreme race pads will never reach working temperature in road use. Could be that, in addition to the lack of servo, the high pedal pressures are due to use of too 'hard' a pad for the conditions you are driving the car under.
Some race pads give bugger all braking effort until they are up to temperature; the more extreme race pads will never reach working temperature in road use. Could be that, in addition to the lack of servo, the high pedal pressures are due to use of too 'hard' a pad for the conditions you are driving the car under.
I'm not sure what pads the car is running. I have been advised to use pagid fast road pads.
Any suggestions?
Sam_68 said:
simoncotton said:
I'm not sure what pads the car is running. I have been advised to use pagid fast road pads.
Any suggestions?
Any suggestions?
Try speaking to Pagid, Ferodo and Mintex directly, explaining your brake specification, the difficulties you have been having, and the type of use you put the car to. They will be able to recommend the most appropriate compound from their range.
Their Engineers are usually pretty helpful, and know more about brakes than almost anyone on here!
Thanks Sam, good idea probably best speak to them direct. I will hopefully use the car for sprint days and hill climb racing.
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