Why, there was a thread several months ago about slotted and drilled rotors. They look cool, but what's the benefit?

 

Heat reduction and anti-warping is the primary advantage.

 

which is an odd thing to claim considering that cross drilling cast ferrous materials greatly upsets the crystalline formation created by the casting process weakening the rotor (ie, they crack fast), and decreasing the mass of metal there is to absorb and dissipate heat (ie, they get really hot really fast).

(oh, i don't mean for you Davis, just people who sell cross drilled rotors).

also note that this is not the same as casting a rotor that already has venting holes in it (which on factory show cars is for looks, and in the case of Porshe ceramic rotors could be for any number of things which are probably not reasons related to the design and function of steel rotors).

 

Keep in mind those of us who have been tracking the car have been mostly experience 0 brake fade. If you upgrade anything just get better pads. That is all you need and not even that for the street. The stock setup is excellent.

 

U.S. Secret Service special agents protect the President, Vice President, and their immediate families; Presidential candidates; former Presidents; and foreign dignitaries visiting the United States. But not governors. I am sure they were his own private detail or state police but since he was out of the country on vacation my bet is private security.

 

Almost always State Police for a governor.

 

Mazdatrix has those fancy swiss cheese rotors.....

 

I haven't experienced brake issues but instead of rotors, I am installing stainless lines and doing a damn good bleeding job. That's all I'll need as these 8's stop on a dime!!

Charles

 

p.s. Not to be a wiseguy, but why does someone who has raced a Maranello need to ask we regular folk where to find a set of drilled/slotted rotors anyway?

C

 

Back to the topic, I don't see how fancy shifting will make your car say, "Aha! Now I know how to handle all of this extra airflow better!" But I guess you aren't having the idle problems most of us had. I got a refund on my K&N.

 

You realize this is not really possible right?

jds

 

Did I miss the post about changing the rear end gears?

 

I guess Mr. TRoy J isn't quite such an expert on gearing as he is on brake installs for Ferrari Maranellos and BMW M3's. But he still knows how to drive on the track! Don't tell him that slotted and drilled rotors and larger brakes are much less a factor in stopping distance than the grip of the tires...

 

You missed the point, the changing gear stuff was sarcastic. It is physically impossible for your car to be driving at the same speed in the same gear at a different RPM unless you did change that stuff. Power mods will get you through the rev range faster, but they don't change gear ratios!

jds

 

JeupRX-8,

What kind of gas mileage do you get with the K&N?

 

Im sorry this is off topic, but it reffers to the origonal post.

I dont understand how an intake can effect the speed you shift.
In fact I dont really think its possible. Maybe it was because there was a change in the powerband, or something...but an intake should not affect your shifting.

 

Uh, no.

 

I could see the MAF sensor getting screwed up maybe. (is the filter oiled or not?)

But even so its not really affecting the shifting itself, but I understand what your saying now.

 

As to intakes causing odd shifting patterns... There is actually a TSB/RI on some GM's for this...

Owners of some 2003 Hummer H2s may experience lack or power, transmission will not upshift, or an erratic shift or stumble.

TIP: Check for an aftermarket air cleaner installed on the vehicle.

Some aftermarket air cleaners pull air directly from the underhood area of the vehicle at a higher temperature than the OEM airbox. The increase in temperature can cause erroneous readings from the MAF sensor, causing the above concerns. If an aftermarket air cleaner is discovered, reinstall the OEM equipment and re-evaluate.

Follow all SI related diagnostics if an OEM air cleaner box is installed and the vehicle still exhibits these conditions.

Taken from http://www.bobistheoilguy.com


Basically in quick summary...the short ram intakes (which may be drawing a good portion of air from the engine compartment) can actually draw in hotter air then the stock airboxes do...(Aka your performance actually gets worse).

Those big *** plastic boxes do do one thing...they help protect the inital intake charge from heat soak. If anyone of you have a can scanner you can easily check your intake air temps with a stock configuration, and then with a short ram (or K&N in this case). On the Mazda 6's at least, the stock airboxes had near ambient temps'...the short rams were considerably higher. (Almost 2x-3x as high)

As for cross-drilled bling-a-thon rotors....

The only time you see a performance increase going to these type of rotors is...

1) They are replacing older/worn OEM equipment.
2) The magazine doing the testing changes the tire/wheel for the second set of rotors. (Usually because the stock wheels don't fit over the aftermarket rotor/calipers).

3) In the case of 2, your actually seeing the benefit from better tires, not bling bling rotors.
4) Severely wet conditions. (Which is the main "reasoning" that some brake companies sell the rotors under).

If you ever replaced OEM rotors with cross drilled ones, did a comparison, then replaced the cross drilled with BRAND NEW OEM rotors...you'd see the loss in performance (as well as the pad eating goodness) of the super bling cross-drilled.

The general argument for cross-drilled rotors seems to be..."They help get rid of heat".

a) Air is less effective then metal at disappating and absorbing heat.
b) Cross-drilling reduces the mass/metal of a rotor.

Enjoy the taste of logic...mmm mmm good.

Here's a nice article on brakes and common myths surrounding them.

http://www.mazda6tech.com/index.php?...d=19&Itemid=32