what rear diffuser is this?
yeah im the asshat youre right
i dont read these forums very often and ive never even owned a diffuser so idk why i even bothered sorry man
you and your megan exhaust and kw variants need to wake up theres serious people around here with evos and while i may never run a voltex diffuser again if you saw the design of it underneath the car youd know while its not a top notch race part nor does it have the price tag its a pretty good diffuser as far as diffusers go it does its best to eliminate the parachute effect caused by the ****ty rear bumper on the evos and is very well mounted
also to make a rear diffuser even useful youd need an almost completely flat bottomed evo and we all know there isny many of those on this forum
and finally when i first read the post you made i thought you were generally speaking aboput voltex not just the diffuser untill i reread it again today
"While it's true that I've seen pics of Voltex parts in a wind tunnel and have certainly seen them on plenty of race cars, you'd have to be quite foolish to assume the part isn't made without any aesthetic considerations.."
ill leave with this...everyone loves a pretty race car
i dont read these forums very often and ive never even owned a diffuser so idk why i even bothered sorry man
you and your megan exhaust and kw variants need to wake up theres serious people around here with evos and while i may never run a voltex diffuser again if you saw the design of it underneath the car youd know while its not a top notch race part nor does it have the price tag its a pretty good diffuser as far as diffusers go it does its best to eliminate the parachute effect caused by the ****ty rear bumper on the evos and is very well mounted
also to make a rear diffuser even useful youd need an almost completely flat bottomed evo and we all know there isny many of those on this forum
and finally when i first read the post you made i thought you were generally speaking aboput voltex not just the diffuser untill i reread it again today
"While it's true that I've seen pics of Voltex parts in a wind tunnel and have certainly seen them on plenty of race cars, you'd have to be quite foolish to assume the part isn't made without any aesthetic considerations.."
ill leave with this...everyone loves a pretty race car
I'm an avid sports car racing fanatic and love everything that goes into building and designing such race cars. However, people are just so quick to assume that anything "JDM" - even if it's clearly being marketed to your average street/show car owner - must automatically have gone through years of R&D and rigorous testing. I'm just tired of seeing that.
Oh, and what in the world are you talking about the parachute effect for? Diffusers are designed to create downforce...which is rather the opposite concept from reducing the drag our bumpers produce.
haha still going
i understand what a diffuser is for
i guess reducing drag doesnt count as being productive for race use you said it was aesthetic
im telling you why its a good race part i didnt know we were going to get into technicallitys
you sir need to just stfu the conversation is over
i understand what a diffuser is for
i guess reducing drag doesnt count as being productive for race use you said it was aesthetic
im telling you why its a good race part i didnt know we were going to get into technicallitys
you sir need to just stfu the conversation is over
haha still going
i understand what a diffuser is for
i guess reducing drag doesnt count as being productive for race use you said it was aesthetic
im telling you why its a good race part i didnt know we were going to get into technicallitys
you sir need to just stfu the conversation is over
i understand what a diffuser is for
i guess reducing drag doesnt count as being productive for race use you said it was aesthetic
im telling you why its a good race part i didnt know we were going to get into technicallitys
you sir need to just stfu the conversation is over
Firstly, I'm rounding up; secondly, the MSRP on V3s is considerably over $1700; and thirdly, you're displaying your ignorance even further if you truly believe specific valving, spring rates, technical help, and a sponsorship aren't worth paying a few hundred dollars more for.
Last edited by 72Tornado; May 1, 2009 at 09:16 AM.
72 Tornado, and Mot, Your both right when it comes to the diffuser. It's designed to enhance the over all aerodynamics of the car. It does reduce the parachute effect, but it also improves down force.
The incoming air at the front of the car is forced to travel under the car at a higher velocity, thus lower pressure than the air surrounding the vehicle, producing greater downforce! Exactly the opposite of an airfoil. Hence spoilers, are reversed airfoils.
There is a problem though when the higher velocity air, low pressure air meets the slower higher pressure air at the rear of the vehicle this causes turbulence. It also causes pressure/ form drag, which commonly referred to as the (parachute effect).
When you add a diffuser to the rear underside of the car, it takes the high velocity low pressure air directs it, and slowly introduces it to the slower higher pressure air. This Reduces turbulence, form drag, and increases down force aerodynamics
I can explain it fairly well in higher detail, but it would take forever, and then you'd probably want to ask questions. So..............here is something I've found for you guy's to argue about on Wikipedia:
A diffuser:
in an automotive context, is a shaped section of the car underbody which improves the car's aerodynamic properties by enhancing the transition between the high-velocity airflow underneath the car and the much slower freestream airflow of the ambient atmosphere. It works by providing a space for the underbody airflow to decelerate and expand so that the boundary between the car's airflow and "external" airflow is less turbulent. It also provides a degree of "wake infill" (the wake being a turbulent area of low pressure that is caused by the passage of the vehicle through the air; this can cause pressure drag).
As the air enters towards the front of the car it accelerates and reduces pressure. There is a second suction peak at the transition of the flat bottom and diffuser. The diffuser then eases this high velocity air back to normal velocity and also helps fill in the area behind the car making the whole underbody a more efficient downforce producing device by reducing drag on the car and increasing downforce.
The aft part of a car underbody can be a diffuser. It works to bring the low pressure air below the car back to the ambient atmospheric pressure without inducing turbulence. It uses Bernoulli's principle, such that the pressure increases while the velocity decreases. Since the pressure below the car is lower than on the side and above the car, downforce is produced if implemented correctly. Injecting the exhaust into the rear diffuser can also help extract the air from below the car. The exhaust gasses effectively energize the boundary layer, helping to raise the pressure of the low-pressure, fast-moving airstream back to the ambient atmospheric pressure at the exit of the diffuser. This helps extract the air more efficiently from the underbody.
The incoming air at the front of the car is forced to travel under the car at a higher velocity, thus lower pressure than the air surrounding the vehicle, producing greater downforce! Exactly the opposite of an airfoil. Hence spoilers, are reversed airfoils.
There is a problem though when the higher velocity air, low pressure air meets the slower higher pressure air at the rear of the vehicle this causes turbulence. It also causes pressure/ form drag, which commonly referred to as the (parachute effect).
When you add a diffuser to the rear underside of the car, it takes the high velocity low pressure air directs it, and slowly introduces it to the slower higher pressure air. This Reduces turbulence, form drag, and increases down force aerodynamics
I can explain it fairly well in higher detail, but it would take forever, and then you'd probably want to ask questions. So..............here is something I've found for you guy's to argue about on Wikipedia:
A diffuser:
in an automotive context, is a shaped section of the car underbody which improves the car's aerodynamic properties by enhancing the transition between the high-velocity airflow underneath the car and the much slower freestream airflow of the ambient atmosphere. It works by providing a space for the underbody airflow to decelerate and expand so that the boundary between the car's airflow and "external" airflow is less turbulent. It also provides a degree of "wake infill" (the wake being a turbulent area of low pressure that is caused by the passage of the vehicle through the air; this can cause pressure drag).
As the air enters towards the front of the car it accelerates and reduces pressure. There is a second suction peak at the transition of the flat bottom and diffuser. The diffuser then eases this high velocity air back to normal velocity and also helps fill in the area behind the car making the whole underbody a more efficient downforce producing device by reducing drag on the car and increasing downforce.
The aft part of a car underbody can be a diffuser. It works to bring the low pressure air below the car back to the ambient atmospheric pressure without inducing turbulence. It uses Bernoulli's principle, such that the pressure increases while the velocity decreases. Since the pressure below the car is lower than on the side and above the car, downforce is produced if implemented correctly. Injecting the exhaust into the rear diffuser can also help extract the air from below the car. The exhaust gasses effectively energize the boundary layer, helping to raise the pressure of the low-pressure, fast-moving airstream back to the ambient atmospheric pressure at the exit of the diffuser. This helps extract the air more efficiently from the underbody.
Last edited by D420mac; May 1, 2009 at 07:44 AM.
72 Tornado, and Mot, Your both right when it comes to the diffuser. It's designed to enhance the over all aerodynamics of the car. It does reduce the parachute effect, but it also improves down force.
The incoming air at the front of the car is forced to travel under the car at a higher velocity, thus lower pressure than the air surrounding the vehicle, producing greater downforce! Exactly the opposite of an airfoil. Hence spoilers, are reversed airfoils.
There is a problem though when the higher velocity air, low pressure air meets the slower higher pressure air at the rear of the vehicle this causes turbulence. It also causes pressure/ form drag, which commonly referred to as the (parachute effect).
When you add a diffuser to the rear underside of the car, it takes the high velocity low pressure air directs it, and slowly introduces it to the slower higher pressure air. This Reduces turbulence, form drag, and increases down force aerodynamics
I can explain it fairly well in higher detail, but it would take forever, and then you'd probably want to ask questions. So..............here is something I've found for you guy's to argue about on Wikipedia:
A diffuser:
in an automotive context, is a shaped section of the car underbody which improves the car's aerodynamic properties by enhancing the transition between the high-velocity airflow underneath the car and the much slower freestream airflow of the ambient atmosphere. It works by providing a space for the underbody airflow to decelerate and expand so that the boundary between the car's airflow and "external" airflow is less turbulent. It also provides a degree of "wake infill" (the wake being a turbulent area of low pressure that is caused by the passage of the vehicle through the air; this can cause pressure drag).
As the air enters towards the front of the car it accelerates and reduces pressure. There is a second suction peak at the transition of the flat bottom and diffuser. The diffuser then eases this high velocity air back to normal velocity and also helps fill in the area behind the car making the whole underbody a more efficient downforce producing device by reducing drag on the car and increasing downforce.
The aft part of a car underbody can be a diffuser. It works to bring the low pressure air below the car back to the ambient atmospheric pressure without inducing turbulence. It uses Bernoulli's principle, such that the pressure increases while the velocity decreases. Since the pressure below the car is lower than on the side and above the car, downforce is produced if implemented correctly. Injecting the exhaust into the rear diffuser can also help extract the air from below the car. The exhaust gasses effectively energize the boundary layer, helping to raise the pressure of the low-pressure, fast-moving airstream back to the ambient atmospheric pressure at the exit of the diffuser. This helps extract the air more efficiently from the underbody.
The incoming air at the front of the car is forced to travel under the car at a higher velocity, thus lower pressure than the air surrounding the vehicle, producing greater downforce! Exactly the opposite of an airfoil. Hence spoilers, are reversed airfoils.
There is a problem though when the higher velocity air, low pressure air meets the slower higher pressure air at the rear of the vehicle this causes turbulence. It also causes pressure/ form drag, which commonly referred to as the (parachute effect).
When you add a diffuser to the rear underside of the car, it takes the high velocity low pressure air directs it, and slowly introduces it to the slower higher pressure air. This Reduces turbulence, form drag, and increases down force aerodynamics
I can explain it fairly well in higher detail, but it would take forever, and then you'd probably want to ask questions. So..............here is something I've found for you guy's to argue about on Wikipedia:
A diffuser:
in an automotive context, is a shaped section of the car underbody which improves the car's aerodynamic properties by enhancing the transition between the high-velocity airflow underneath the car and the much slower freestream airflow of the ambient atmosphere. It works by providing a space for the underbody airflow to decelerate and expand so that the boundary between the car's airflow and "external" airflow is less turbulent. It also provides a degree of "wake infill" (the wake being a turbulent area of low pressure that is caused by the passage of the vehicle through the air; this can cause pressure drag).
As the air enters towards the front of the car it accelerates and reduces pressure. There is a second suction peak at the transition of the flat bottom and diffuser. The diffuser then eases this high velocity air back to normal velocity and also helps fill in the area behind the car making the whole underbody a more efficient downforce producing device by reducing drag on the car and increasing downforce.
The aft part of a car underbody can be a diffuser. It works to bring the low pressure air below the car back to the ambient atmospheric pressure without inducing turbulence. It uses Bernoulli's principle, such that the pressure increases while the velocity decreases. Since the pressure below the car is lower than on the side and above the car, downforce is produced if implemented correctly. Injecting the exhaust into the rear diffuser can also help extract the air from below the car. The exhaust gasses effectively energize the boundary layer, helping to raise the pressure of the low-pressure, fast-moving airstream back to the ambient atmospheric pressure at the exit of the diffuser. This helps extract the air more efficiently from the underbody.
The Voltex piece is hideous IMO. And although some of their bumpers and kits look like they would be great additions for a track car, I highly doubt this piece does anything but make the rear end look ugly.
Thanks for the compliment!
I think the Voltex is a bit excessive, it looks ok with the right paint, and additional exterior add ons. I don't like the flared fenders, I've seen on some of the cars, with this diffuser. A Carbon trunk, roof, and hood would make it look better IMHO.
I think the Voltex is a bit excessive, it looks ok with the right paint, and additional exterior add ons. I don't like the flared fenders, I've seen on some of the cars, with this diffuser. A Carbon trunk, roof, and hood would make it look better IMHO.
You need to learn what the **** you're talking about before you try to enter into a discussion. Firstly, I'm rounding up; secondly, the MSRP on V3s is considerably over $1700; and thirdly, you're displaying your ignorance even further if you truly believe specific valving, spring rates, technical help, and a sponsorship aren't worth paying a few hundred dollars more for.
Firstly, I'm rounding up; secondly, the MSRP on V3s is considerably over $1700; and thirdly, you're displaying your ignorance even further if you truly believe specific valving, spring rates, technical help, and a sponsorship aren't worth paying a few hundred dollars more for. 
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