rear brake airduct??

[other whitcomb]

So after I finally got my car in a garage and noticed in the rear wheel well its pretty rusty on the bottom, where they usually rot on the bottom kinda where the sideskirt bolts up......I hope that make sense as I do not have a picture at this time of what I am talking about. Anyways, what I thought of this morning on no sleep was that instead of welding in new little patches what about making an airduct of some sort for the rear brakes....so I'm open to opinions guys and gals!

 

[TSITurbo95]

All in all, it sounds like a great idea, but it is not necessary. Unless you plan on running a texas mile, or autocross, or something of that nature in which you use your brakes heavily, than I say it is worth it. But for daily driving, its not something plausible IMO. But do what you want, it's your car. As stated, I like the idea

 

[other whitcomb]

Yeah the car will be a weekend warrior/dd type thing. Whe driving down in the city for night time cruises on wooward it might be handy I guess because if I decide to play around its a lot of accelerating followed by braking . The holes are pretty small ill get a picture tonight then maybe some opinion/ideas might be the deciding factor.

 

[jtmcinder]

Brake ducts for the rear are only ever needed on seriously tail-heavy cars, like a Porsche. On our cars, the rears do very little of the work and don't need ducts.

 

[knewblewkorvett]

I agree. The front brakes do most of the work.
Now for the car's appearence, could be neat and definitely unique on a Talon Go for it then post pictures for us.

 

[jtmcinder]

It one of my few "cosmetic" moments, I asked TCE if they could make me rear brakes as large as the fronts. They talked me down.

 

[other whitcomb]

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Here's what I'm talking about. Its a small hole and its on the passenger side too. Yeah easy fix but definately thought it would be unique. Have it start from under the car and enlarge the hole in the well. But not just a random hole put there I would try to nicely tube/mold it. Curious though how it would be for rain or snow? Clog it up with snow maybe idk.

 

[jtmcinder]

There's a reason why a vent into the rear wheel-well right in front of the tire would be unique: it would be less than useless. It could actually end up reducing air-flow across the rear rotor.

 

[knewblewkorvett]

it would be less than useless. It could actually end up reducing air-flow across the rear rotor.

Do you say this because of the location of the hole
Some cars like the Corvette Z06 comes from the factory with rear brake ducts. They even make an aftermarket kit to install on regular Corvettes.

Corvette Brake Cooling System, Rear, 1997-2004 - Corvette Parts and Accessories

 

[arrowhead]

Brake ducts for the rear are only ever needed on seriously tail-heavy cars, like a Porsche. On our cars, the rears do very little of the work and don't need ducts.

You can never have cool enough brakes weather front or rear if you are going to drive a little hard, remember it is the same fluid.

 

[ed1380]

but different rotors/pads

There's no use in brake air ducts especially with stock brakes and rear brakes

 

[jtmcinder]

Do you say this because of the location of the hole

Yes. If the entry point is in front of the wheel, I don't see how you'll get the air to the inside of the wheel. Dumping more air into the wheel-well in front of the tire will likely reduce the flow across the rotor.

You can never have cool enough brakes weather front or rear if you are going to drive a little hard, remember it is the same fluid.

You really think that heating the fluid in the rear caliper will have any effect on the fronts? Really? If so, then does this depend on whether the weather is warm or cool?

And, actually, you can have brakes that are too cool. Pads have an optimal range of temp, not just a service maximum.

 

[other whitcomb]

does make me a little curious as to why zo6s have rear brake ducts then.....but hopefully in the future i will have the money to get some patches welded in. they are not really bad by looking at them at first but i have not been under the car yet. i can only pray that it is not completely rotted under the car.

 

[jtmcinder]

Because a fricking Z06 has near 50/50 weight distribution and a CG that is like half the height of a normal car. So it does use its rear brakes.

Did you miss where this came up earlier? Where I said that Porsches have rear brake ducts? Does every pair of dots have to be within a hair of each other for them to get connected by you guys? Damn.

No, Snowy, you needn't give me a time out. I'll take one on my own.

 

[arrowhead]

Because a fricking Z06 has near 50/50 weight distribution and a CG that is like half the height of a normal car. So it does use its rear brakes.

Did you miss where this came up earlier? Where I said that Porsches have rear brake ducts? Does every pair of dots have to be within a hair of each other for them to get connected by you guys? Damn.

No, Snowy, you needn't give me a time out. I'll take one on my own.

Read post #3 of the OP, although for a dd you may not need them, READ what I posted and yes the heat will transfer from rear to all your brake lines including the front.

Why do you get so upset?

 

[jtmcinder]

Me, upset? Nah. Why would it bother me that you're posting that the moderate levels of heat that can build up in the rear calipers of a DSM can travel through the brake fluid up to the prop-valve and then down to the fronts and have anything like a measurable effect? Why would reading such a claim bother anyone? You'd have to be someone that cared about reality for that to bother you and I, for one, no longer give a rat's derriere about reality. So, no, I'm not upset at all.

And if the OP wants to cut holes in his already weakened-by-rust unibody so he can have duct to his rear wheel wells which are more like to decrease cooling of his brakes, then who am I to question such?

(Going back on break now ... see you in a few days.)