My car is an evo I GSR (CD9A).
New rotors, new brake pad (Carbotech XP10), new brake fluid (ATE Typ200).
Tires are Kumho XS 215/40R16. Almost finished. Brake lines are stock rubber.
Suspension is a set of Ground Control coilovers with 440FR (8kg/mm), 340RR (6kg/mm) spring rates.
I have -1.5 deg front camber, -1.9 rear camber. Stock toe and caster.
I run around 38-40 psi (hot) on all 4 tires.
On the track, I have been having brake fade issues after a few laps
My brother has the same car with a very similar setup. The only difference is that he has slightly softer springs front and rear (340/280). He does not experience brake fade as bad.
We did a couple sessions where I would follow him closely on the track.
I was extra careful with my braking technique, trying to brake hard but for as little time as possible.
At the end of the session I measured the surface temperature of our rotors with an IR pyrometer:
Me: front 400+ F, rear 300F
Brother: front 350F, rear 325F
(this is after a cool down lap for both of us)
First question: Why are my front discs getting much hotter?
It seems counter intuitive. With the stiffer springs, I would imagine my car would experience less weight transfer to the front. The greater temperature difference between front and rear on my car seem to indicate that the front brakes are doing more work. What can be the cause of this? Problem with the bias? Can bias valves fail? Can they get clogged? Easy to replace?
Any other ideas or suggestions as to what may be the cause of this?
Thanks for the input.
Karim
New rotors, new brake pad (Carbotech XP10), new brake fluid (ATE Typ200).
Tires are Kumho XS 215/40R16. Almost finished. Brake lines are stock rubber.
Suspension is a set of Ground Control coilovers with 440FR (8kg/mm), 340RR (6kg/mm) spring rates.
I have -1.5 deg front camber, -1.9 rear camber. Stock toe and caster.
I run around 38-40 psi (hot) on all 4 tires.
On the track, I have been having brake fade issues after a few laps
My brother has the same car with a very similar setup. The only difference is that he has slightly softer springs front and rear (340/280). He does not experience brake fade as bad.
We did a couple sessions where I would follow him closely on the track.
I was extra careful with my braking technique, trying to brake hard but for as little time as possible.
At the end of the session I measured the surface temperature of our rotors with an IR pyrometer:
Me: front 400+ F, rear 300F
Brother: front 350F, rear 325F
(this is after a cool down lap for both of us)
First question: Why are my front discs getting much hotter?
It seems counter intuitive. With the stiffer springs, I would imagine my car would experience less weight transfer to the front. The greater temperature difference between front and rear on my car seem to indicate that the front brakes are doing more work. What can be the cause of this? Problem with the bias? Can bias valves fail? Can they get clogged? Easy to replace?
Any other ideas or suggestions as to what may be the cause of this?
Thanks for the input.
Karim