^^^^^^^^^This is true^^^^^^^^^
I happen to love that 4 piston caliper. In 1973 Chrysler cheeped out again and went to the single piston caliper.
I stopped a 9.4x 2750 pound car with 4 drum brakes. I spent a bunch of time on line pressure, pad area and made sure all that drums had as much thickness as I could get. Stopped like a dream.
Would I want to do that on a circle track or road race car? Nope.
I also didn't use off the shelf brake linings either. I used some stuff a local friction house had.
I think you can do what you want with a little thought, planning and math. Master cylinder bore size, and pedal ratio is critical.
What he said.
I am a big fan of those also. Mine pull me down just fine from 110 even just with 10 x2s out back; on a typical track day.
With big traction out back, you can gut the Pvalve and increase brake force out back, without getting into spinning. IMHO discs out back is......... careful now, excessive. How's that.Excessive for a streeter, and excessive for a 12 second car.For 9s IDK. But one thing I do know; if the rear gets to be too powerful in relation to the front,and the rear breaks loose, you will be spinning.Another thing I know is that 10 x 2s out back, with a gutted Pvalve, and with 15/16s WCs, and with matching brake compounds all round is not too much for the KH front set-up. Not too much for 325/50-15 DRs. Nor even for 295/50 streets. My Barracuda is a pleasure to stop.That system has saved us (my son drives it too, but he's not as wild as am I),more tham a few times. At legal speeds I like to use the adjective "incredible". For an A-body,she stops incredibly hard.And the front skid-point is very predictable and easy to manage, even with just 235/60-14 streets up front.Coopers/or BFGs no less.Having strong rears that don't lock prematurely really helps. At least that's what I have come to believe.
As an aside, I sometimes wonder if I could have a little more back there, but have never needed more. It's strictly a wonder. I wonder where the line is. Wonder has a strong pull to it....................
I must tell you tho, that I am a streeter. I rarely exceed 80/90mph. And multiple stops together are rare also. I only remember a few instances during initial testing. The car has been to the track just 3 times in 16 years and run only about 12 times. With a small cam, she went 106@ low 12's(can't recall). Later with one size bigger cam, she went 93 in the eight.So she's not particularly fast, just a hot streeter. I like to believe that with better rear suspension, and optimum gearing, she might be in the 11s.In all instances she had plenty of time to cool-down the brakes between rounds.As well,one of the tracks was an old airport runway with plenty of shut-down area.
I cannot guess as to how they will fare in a 9er.But if you already own 'em, I'd sure give them a chance to shine.
