Is there such a thing as "internal" vs "external" rotor venting?

[MoPar Man]

If someone says there is such a thing as internally vs externally vented
brake rotors (for cars) - what could they mean?

If you have a rotor formed by 2 plates, the plates separated by an air
gap formed by a structural web or matrix or separators, then what
additional aspect of their construction would lead to one being called
an internally-vented rotor while a second would be called externally
vented?

(supposedly for the LH-era 300m there was a difference between the PHP
vs non-PHP option package in terms of the front rotors being internally
vs externally vented, something that may or may not have any findable
authoritative source...)

[MummyChunk]

Post by MoPar Man
If someone says there is such a thing as internally vs externall

vente

Post by MoPar Man
brake rotors (for cars) - what could they mean
If you have a rotor formed by 2 plates, the plates separated by a

ai

Post by MoPar Man
gap formed by a structural web or matrix or separators, then wha
additional aspect of their construction would lead to one bein

calle

Post by MoPar Man
an internally-vented rotor while a second would be calle

externall

Post by MoPar Man
vented
(supposedly for the LH-era 300m there was a difference between th

PH

Post by MoPar Man
vs non-PHP option package in terms of the front rotors bein

internall

Post by MoPar Man
vs externally vented, something that may or may not have an

findabl

Post by MoPar Man
authoritative source...

Brake rotors are discs that ar
attached to the wheels of a car and are used to slow down or stop th
vehicle when the brake pads are pressed against them. Brake rotors ca
be vented or solid, depending on the design and purpose of the car
Vented rotors have air gaps between the two plates that allow air t
flow through and cool down the rotor, while solid rotors are mor
compact and cheaper, but less effective at dissipating heat

Vented rotors can be further classified into internally vented o
externally vented, depending on the direction of the air flow
Internally vented rotors have curved vanes or fins that direct the ai
from the center of the rotor to the outer edge, creating a centrifuga
force that increases the cooling effect. Externally vented rotors hav
straight or angled vanes that direct the air from the outer edge t
the center of the rotor, creating a suction effect that also cool
down the rotor

The difference between internally and externally vented rotors i
mainly related to the performance and efficiency of the brakin
system. Internally vented rotors are more common and suitable for mos
cars, as they provide better cooling and less noise than externall
vented rotors. Externally vented rotors are more rare and specialized
and are usually found on high-performance or racing cars, as the
offer more consistent braking and less fade than internally vente
rotors

The Chrysler 300M had different types of brake rotors depending on th
option package. The Performance Handling Package (PHP) include
externally vented rotors on the front wheels, while the non-PHP model
had internally vented rotors. The PHP rotors were larger and heavier
and required a different caliper and bracket to fit. The PHP rotor
were also more expensive and harder to find than the non-PHP rotors


This is a response to the post seen at
http://www.jlaforums.com/viewtopic.php?p=394141807#39414180