Brake Proportioning Valve Kit

[RYU]

What are you guys using?

The only one I can find specifically for the NSX is the Dali kit. Was hoping for a more compact rotary/dial setup and something a less expensive if possible.

Dali's Kit: http://daliracing.com/v666-5/catalog/index_browse_part.cfm?focus=399

Thanks

 

[docjohn]

I never had any problems with the oem system and front only brembo indy bbk.I have recently(last year) upgraded to the 2002 system, the only proportioning I do is with differing pad compounds.

 

[RYU]

Thx for the feedback John. I'm looking into a kit that may need more than a pad swap to help with the bias so hoping primers can aid in my research.

I also figured that since i'll be doing virtually a complete brake bleed (again) it would be a good time install a valve. Call it wishful thinking but hoping to get better at trail braking someday :biggrin:

 

[stuntman]

To do it properly, select a caliper and rotor with piston sizes and a diameter that will be in the ballpark of factory bias. While a front brembo or ST upgrade shifts the bias forward, and while its not ideal, its still acceptable.

Personally, I don't like the inline prop valves because they can create residual line pressure when you let off the brakes. They resist pressure to the caliper, but when releasing the brakes, they resist pressure from the caliper back to the master cylinder. This can cause the rear brakes to drag when entering the corner as you release the brakes (rears will still be biting hard as the fluid goes through a restriction back to the master cylinder and even snap oversteer. Not a good thin

0.02

 

[RYU]

That's great info Billy.

This might seem like an obvious/dumb question but i'm trying to understand if my driving skills are even good enough to notice a less than optimal brake bias situation. Can you help me/us understand, in real world terms, what a 50/50 bias will feel like when compared to stock? Would the average wknd HPDE guy even notice it and in what conditions? Also, what's the advantage/disadvantage of using pad compound as a way to adjust brake bias?

thx much again.

 

[stuntman]

That's great info Billy.

This might seem like an obvious/dumb question but i'm trying to understand if my driving skills are even good enough to notice a less than optimal brake bias situation. Can you help me/us understand, in real world terms, what a 50/50 bias will feel like when compared to stock? Would the average wknd HPDE guy even notice it and in what conditions? Also, what's the advantage/disadvantage of using pad compound as a way to adjust brake bias?

thx much again.

Are you going to a 50/50 bias?

It will be more rear bias than factory which isn't ideal but if you use a low grip rear pad and a high grip front, the initial bite and torque of the front will be more than the rear which can balance the system out to an extent.

With ABS, a 50/50 bias will engage the ABS system (or without, will lock the rears) earlier than with a proper bias. Basically the car won't decelerate with the same threshold ability but the difference will probably not even be noticeable for most drivers.