Right now I have too much front brake bias on my FD.

Goal: Keep ABS and replace OEM prop valve with an adjustable prop valve.

I have been searching discussions but everyone doing this seems to be either deleting the ABS or just adding a prop valve in the front line which just adds more restriction.



What is the best and safest way to meet the above goal? Avoiding line cutting will definitely help the safety aspect. Any images of successful attempts will definitely be appreciated!

 

What's your brake setup right now?

 

Only my fronts are modified: 1998 crown Vic rotors (larger diameter) and wilwood calipers (larger pistons).

 

I could be wrong but I think the least invasive thing you could do is get larger diameter rear rotors and put pads in the back that have a stronger bite than those in the front.

 

You are correct but I am looking to fine tune the balance for track use. If anyone has added an adjustable prop valve and kept ABS, please let me know the secret

 

Proportioning more pressure to the rear means less pressure to the front which kind of defeats the purpose of the BBK. As mentioned, try more aggressive pads in the rear. If that doesn't work, you may need to upgrade your rear brakes

Also, does your ABS kick in on the track? Mine doesn't (threshold braking). Think i may just scrap it entirely

 

With stock brakes I boiled brand new Motul 600 at the track so my main objective for the bbk was just to manage heat. I have had ABS kick in at the track with stock brakes but I haven't had a track day yet since the upgrade. This modification will just allow me to tune the brakes when I try them out the first time. I can try different rotors and pads in the rear but that route is more trial and error, I would prefer to be able to fine tune the system if possible.

 

https://www.rx7club.com/race-car-tec...-valve-931953/