Do drilled and/or slotted front disc brake rotors stop better that stock ? Are they worth the additional expense ? On a 69 Chevelle SS396 , power brakes , stock diameter.
Gene

Lots of opinions out there on this -- I'll give you mine :)
The purpose of drilled/slotted rotors is to help clear out dust and/or outgassing of the pads that can happen if things get REALLY hot. There "may" be some minimal cooling benefit as well due to marginally more surface area.

On anything remotely resembling a street car, they look very cool, but are unlikely to provide any real benefit to stopping power, pedal feel, etc. I don't think they're worth the $ at all from a functional perspective. The visual aspect is up to you...

Best bang for the $ on the street is good pads/shoes. (note -- "good" does not mean ultra-crazy race pads that work at 3000 degF. It means grippy street pads that work well cold and don't overheat on the street under light abuse). Hawk HPS pads get good reviews in general, but I haven't done much (any?) cross testing, so I don't have good perspective here...

-T

Has anyone used the Praise Dyno Brake products? They make substantial claims about how good their pads and shoes are.

I want to say that Porterfield sell's the old stock-type semi- and metallic pads for our cars????

And I've also read that guy's say good things about Praise. (Kevlar pads??)....

pdq67

The nice thing about plated/zinc washed rotors is, the darn things wont rust like the unplated ones. I got them for my Chevelle, and also drilled slotted. I just know that they look kinda cool, but the plating does help keep things looking good. I am all into that!!!!!

The nice thing about plated/zinc washed rotors is, the darn things wont rust like the unplated ones. I got them for my Chevelle, and also drilled slotted. I just know that they look kinda cool, but the plating does help keep things looking good. I am all into that!!!!!

OH,KKK But do they stop better !!!!!!!!!!!!!!

Stops better than the drums I had!:D

i didn't put disc on the rear of my vette and i regret it! so no my chevelle i will be puting cpp big brakes all around.

Thanks for your reply T , thats what I was looking for. No point spending money on rotors if they don't stop better. Maybe there is something in a 12 inch rotor kit that will still fit inside 15 inch wheels.
Gene

Thanks for your reply T , thats what I was looking for. No point spending money on rotors if they don't stop better. Maybe there is something in a 12 inch rotor kit that will still fit inside 15 inch wheels.
Gene

I think Baer has a kit called " Serious Street " meant for 15" wheels, might want to check it out.

I went to the Wilwood site and it looks like they may have something that will work.
It's a 12.19 dia. rotor with a 4 piston caliper. Going to e-mail their tech and see what they say.
Thanks for your input guys
Gene

Do drilled and/or slotted front disc brake rotors stop better that stock ? Are they worth the additional expense ? On a 69 Chevelle SS396 , power brakes , stock diameter.
Gene

Lots of opinions out there on this -- I'll give you mine :)
The purpose of drilled/slotted rotors is to help clear out dust and/or outgassing of the pads that can happen if things get REALLY hot. There "may" be some minimal cooling benefit as well due to marginally more surface area.

On anything remotely resembling a street car, they look very cool, but are unlikely to provide any real benefit to stopping power, pedal feel, etc. I don't think they're worth the $ at all from a functional perspective. The visual aspect is up to you...

Best bang for the $ on the street is good pads/shoes. (note -- "good" does not mean ultra-crazy race pads that work at 3000 degF. It means grippy street pads that work well cold and don't overheat on the street under light abuse). Hawk HPS pads get good reviews in general, but I haven't done much (any?) cross testing, so I don't have good perspective here...

-T

The only thing I would add is to avoid cross drilled rotors, after repeated heat cycles they tend to develop stress fractures and of course they'll finally fail when you need them the most!

If you need to maximize the performance of your stock braking then go with slotted rotors and a good performance pad. And don't forget a high temp brake fluid!

(I run Hawk HP Plus, DBA slotted rotors and Motul 600 fluid for my 06 GTO which sees several track days a year.)

Unless you're using your car on the track, road courses or autocross, or maybe if you commute in a lot of stop and go traffic, there really is no need for slotted rotors. But I would always go with a good set of pads. (The recommendation of Hawk HPS is a very solid choice for daily street use and significantly better than a 'stock' pad.)

Has anyone used the Praise Dyno Brake products? They make substantial claims about how good their pads and shoes are.

I have the same question since I'm in the middle of rebuilding the drums on my Chevelle. I really don't want to change the vintage looks so rather upgrade my drums than go with discs, but it seems drum performance enhancements are limited.