Comptech Pro Street Kit - Bias Adjustment Needed?

[Number9]

I bought the above kit but haven't installed it yet. The question is in the context of a 97+ NSX. Assuming one installs the CT SP front brake kit (and matching drilled rear rotors for consistent appearance), does one need to install a proportioning valve to adjust front-to-rear brake bias?

 

[docjohn]

If you mean the 12.4 brembo front, stock size rear then, no, thats one of the benefits of this kit.I feel it is well ballanced as long as you use a track pad in the rear.

 

[Yellow Rose]

No prop valves are needed with your proposed setup.

In fact, even if you also had large calipers in the rears, brake bias can be achieved w/o the prop valves by running a less agressive pad compound on the rears.

For example, I run Carbotech Panther Plus in the front and Porterfield R4-S on the rear. With no prop valves, for my track driving style only in the most extreme of situations will the rears lock up. Even so, it is predictable and manageable.

 

[Number9]

Thanks guys. So assuming the street pro front kit and stock rears w/cross-drilled rotors, is R4S front pad/R4 rear pad the e-ticket ride or a mostly street, occasionally track car?

 

[docjohn]

Its interesting to see(Andy) that you also put r4s in rear with a more agressive front compound.I use pagid up front and the porterfield rear.To number 9;The r4 is a more agressive compound than r4s so you'd want r4 in front r4s in rear.This asumes you are going to do some track events,if not ask about some metal master or other street pads from Comptech.

 

[Number9]

Originally posted by docjohn:
If you mean the 12.4 brembo front, stock size rear then, no, thats one of the benefits of this kit.I feel it is well ballanced as long as you use a track pad in the rear.

Now I'm confused. From the above post, I inferred that you suggest more aggressive pads at the rear to balance the big-brake kit in front. If the front Brembo's brake better than stock, that would seem to be intuitively correct. In your later post, you suggest more aggressive front pads (as compared to rears) which would seem to exacerbate the mismatch caused by the big-brake front kit. Help!?

 

[docjohn]

What I meant was that the rear should be a track pad period,not the stock street pad.The fronts do most of the work,so much so that you really want as grippy,but durable a pad as possible, up front.As long as whatever you have in back is somthing of a track compound thats ok.The bias problem is really not an issue with this kit.So I would put the r4,up front r4s or carbotech or rm in back.Dont overthink this one I,ve never had rear lock-up,and I always use a more agressive front compound.