Which way do they GO ???

Topic: Which way do they GO ??? (Read 3849 times) previous topic - next topic

Which way do they GO ???

May 31, 2013, 06:40:02 AM

Ok as some of you know i am doing a C4-C5 conversion on an early Vette. So i installed the drivers side and completed the fronts. BUT JR lashed in to me as getting old and loosing it. He slammed me for installing the rotors on the wrong sides of the car????? So just for kicks are they installed wrong or right . This is just for laughs and an information post. So here is the driver side and please chime in as to the direction this rotor should be facing. Thanks. I think some will be interested in the OUTCOME!!!

DRIVERS SIDE ROTOR AND THEY ARE DIRECTIONAL !!! The pencil marks are clearly on the top of the rotor and the scoops face forward as shown ?????????? ARE THEY INSTALLED CORRECTLY ???

Which way do they GO ???

Reply #1 – May 31, 2013, 09:18:35 AM

I'd say they were correct based on the direction of the cooling vanes inside the rotor itself.

Which way do they GO ???

Reply #2 – May 31, 2013, 10:22:35 AM

The original Motorcraft rotors for old Aerostar vans were directional like this, and they taught us in school that directional rotors breathe from the outside meaning that the vanes on directional rotors should always point forward at the top of the wheel or there is no pumping action in the vents. These are force cooled rotors and they'll only really work well one way. You'll know if they're on wrong because you'll get brake fade sooner when you're beating on them. I'd say you've got this one at least on correctly.

Which way do they GO ???

Reply #3 – May 31, 2013, 12:07:32 PM

Quote from: TOM Renzo;416305

DRIVERS SIDE ROTOR AND THEY ARE DIRECTIONAL !!! The pencil marks are clearly on the top of the rotor and the scoops face forward as shown ?????????? ARE THEY INSTALLED CORRECTLY ???

Tom,

The vanes should be angles toward the rear, not the front as the rotors are designed to "pull" air in from the center and expell it out the edge.

Which way do they GO ???

Reply #4 – May 31, 2013, 12:10:08 PM

Backwards.

They vent from the center outward.

When brake cooling ducts are installed on race cars, the fresh air is directed at the hub, not the outer edge of the rotor.

Which way do they GO ???

Reply #5 – May 31, 2013, 01:21:31 PM

Good answers i will wait to post the correct way these rotors go on. I know the PORSCHE rotors point to the rear and pull from the center in and out to the top. Chuck is correct on his post but i will wait till some others post. HINT!!!!! LOOK AT THE PENCIL LINES CAREFULLY!!!!!

Which way do they GO ???

Reply #6 – May 31, 2013, 01:39:18 PM

I guess school WAS 15 years ago...

Which way do they GO ???

Reply #7 – May 31, 2013, 01:56:31 PM

But once again are these rotors on incorrectly FOE. Think again!!!! You were closer the first time you posted. Once again look at the pencil marks closely!!!

Which way do they GO ???

Reply #8 – May 31, 2013, 09:53:33 PM

Here we GO!!!!! Fins are going in the correct direction. Reason being it has a combination of long and short scoops as pointed out by the pencil marks. Thanks!!!

Which way do they GO ???

Reply #9 – June 01, 2013, 12:01:35 AM

*Normally*, curved-vane rotors install backwards from what is shown in this particular install.

Seeing as this is also not TBird/Cougar tech, I'm moving it to the Lounge.

Which way do they GO ???

Reply #10 – June 04, 2013, 09:39:09 PM

Moving on on my Brake conversion i needed a master cylinder with a bore diameter of 1" So the WS6 was my choice. But the mounting was a little to small. The old cylinder has a center to center distance of 3 1/2 inches and the WS6 was only 3 3/8 so i had to do some filing with a rat tail. No sweat a few strokes and it fit great. Only issue the push rod was to long for the WS6 master. So i had to drill it deeper by 1/4" Here is how it is dun.

Widening the was easy

There it is a modified cylinder that fits like a glove. I will tear it down and clean it up in the ULTRA SOUND and rebuild it to factory specks. Just wanted to post a mod on what can be dun to make things work. This happens to be a VETTE but i am going to install VETTE brakes on a mustang Stay tuned .

NOTE this car is a TEXAS car that i work on in the summer. The owner is a golf PRO and spends winters in TEXAS and summers up north. Can you imagine if he needed brake work down in Texas or in some other shop. Parts would be non existent as i modified all the components. I have to include a build sheet to the owner if he ever needed repairs other than from ME.

Which way do they GO ???

Reply #11 – June 05, 2013, 01:50:48 AM

not sure why this brake tech needs moved to the lounge, its tech stuff on brakes and we all have them,, matter of fact we all at some point have had dealings with custom rotors ect on our fox's.

if that rotor is the drivers side and the caliper is on the rear, and since directional rotors pull aie from the center, i would say your rotor is backwards.

what fluid are you using in your ultra sound cleaner? when i was in the navy we had 5gal cans of freon we poured in to clean with. the stuff worked great

Which way do they GO ???

Reply #12 – June 05, 2013, 05:06:12 AM

Beats me Chuck W moved it and i thought is was strange myself. Basically i posted it as a how to brake mod. Brakes are brakes but i guess it was not FORD related. Sometimes i think i am wasting my time posting things as engines are engines brakes are brakes and like you point out JAY why in the LOUNGE. Well not my call. So do you like what i did so far. let me know. By the way if someone UP DATED a brake system on a FORD with WELLWOOD brakes would that be in the lounge or in TECH???

Basically i think it is a water soap solution. In the ultra sound. Beats me i just buy the STUFF????? Not a clue of what it is???

Jay the rotors are correct. They are of a different design. Long short system of vanes. A lot of cars do it this way. But i do agree most go the other way. Why chevy and other cars do it the other way is still puzzling to me. But according to CHEVY those rotors are on correctly. And marked as such!!

Stand by i am going to install c5 brakes on a ford shortly. Doing this VETTE made me think i can use the old C4 front brakes on the rear of Mustangs And cougars as well as T Birds. They are floating units and are much bigger than some factory ford units. Only issue is no provision for an E BRAKE. But i have that covered with a hydraulic locking unit.

Which way do they GO ???

Reply #13 – June 05, 2013, 10:52:31 AM

Seems like I recall a 4 eye Bird with some 'vette brake parts on it.

Which way do they GO ???

Reply #14 – June 05, 2013, 12:38:28 PM

The original post had nothing to do with install on a TBird or Cougar. It was you talking about a brake swap on a Corvette, and adding a little quiz to go along with it. Not much applicable tech there.

Now, if you want to talk about your LS M/C install into a Fox, then OK, that's applicable and you should've started another thread in the brake section. Same as if/when you consider a GM brake swap on a Fox.

Yes, I installed the 12" C4 Vette stuff on the front of my '80 XR-7, and detailed it in my build thread.

Tom, the C4 Vette stuff (12") I installed on my Merkur Scorpio has provisions on the rear calipers for a cable-actuated e-brake, (As seen below) but I imagine the C5 stuff is a bit different.