Anyone know if the brake bias valve Paragon sells is the 5/33 one.

 

I've got one in my garage waiting to be installed and that's what it says on it.

T. Breen

 

Thanks T.

Are you running the stock suspension?

I'm using much stiffer springs up front and am considering the 5/45 valve over the 33, since less weight will be transferred to the front wheels with the stiffer spring and the 5/33 seems to be a good match for the stock setup.

Anyone have any experience using the two valves?

 

I just finished bolting in some new Koni strut inserts in the front and Koni shocks in the rear. I am keeping the stock springs for now.

My hope is that after the 5/33 and shocks, front lockup will be less of a problem. An '86 owner with an old suspension once told me not to jab the brake but to apply softly at first to load up the front wheels then lay into it. It works if you have the time to wait for the weight to transfer.

I wanted to try the stock spings as the car is a summer daily driver but I haven't ruled out the 200 pounders with spacers. I also plan on installing a set of SS brake lines from Paragon since I have to bleed the system anyway. I should be back on the road in 2-3 weeks and will report back what I find out.

T. Breen

 

John.

If you have stock 86-88 brakes or 88TS/89 with S4 brakes, go with the 5/33 bias valve.

5/45 was needed when I went to the Big Reds.

I went from Stock 87 to S4 to Big Red.

Eugene.

 

Thanks Guys, I ordered the 5/33.

Eugene, What suspension setup are you running?

 

John.

Bilstein coilover/cup springs.

Eugene.

 

Get an adjustable valve!

The balance setting needed depends on many factors such as weight balance, brakes, suspension, tires and road condition. The road condition is a very important factor. When the grip is less god (ie rain) you need much more force on the rear wheels.

This is why the factory valves have a high "margin of error" giving the rear wheels to little force. Or else you could end up with too much rear brake force when the conditions are suited for it. And that is not a good thing.

We tried several factory valves when upgrading the brakes on the 944. Finally we did the right thing and got an adjustable proportioning valve. That way we can fine tune the brake proportioning for optimal balance no matter how the other factors change...

Regards
Eirik Kvello-Aune
<a href="http://www.diateam.no/porsche" target="_blank">www.diateam.no/porsche</a>

 

My car is set up like Eirik's. Proportioining valve removed and an adjustable valve installed in it's place. Big Reds in front stock rears on an 86 widebody, 2390 lb.

Alan C.

 

I thought that weight transfer wasn't affected by spring rates.

 

Yeah, I thought about an adjustable valve, and decided against it. Simply didn't want to hassle with routing additional lines. Not just yet anyway. I’ve got to many other projects going on right now, but definitely the ideal option.

Thanks

 

Eugene
How do you like the Big Reds?.How do they compare to the S4.I am looking at the S4,but might hold out for the Big Reds.I like the priceof Paragon Products Brake set up.

 

I have an 87 951 what would 5/33 do versus stock, which is what I currently have.

 

rsrdan.

There is a Big improvement in braking going to S4.

Going from S4 to Big Red gives you a little more improvement. But the major benefit is better cooling of the rotors under very hard use(track)
12.7" rotor vs 12" rotor

Big Red Calipers also use larger brake pads which tend to last longer(more surface area)

If you can get a good used S4 calipers at a good
price, go with it. If you are getting New, I would recommend the Big Reds since their price is lower than the new S4's and gives you better " overall " performance under hard use.

Eugene.

 

ringo951.

The stock bia valve is 5/18 bar.

The 5/33 bar unit will give you more braking force to the rear brakes and improve overall braking. This will be more noticeable under Hard braking situations.

Eugene.