Diffuser Myths Begone - Page 3

DenverMR2 · 07-22-2008, 12:24 AM

Na I think it was performance and about photoshopped dyno sheet

Mark_Dorman · 07-22-2008, 12:50 AM

How low does your car actually have to be to benefit from a splitter? I parked next to an Lotus Elise this weekend and it wasn't much lower than your average dropped MR2...it's a good bit smaller though. If the lotus can benefit from a splitter and diffuser I don't see why the MR2 couldn't either.

Raptor13x · 07-22-2008, 01:01 AM

^ Your car will probably benefit from a properly-designed splitter- it's just a matter of to what degree.

Mark_Dorman · 07-22-2008, 12:26 PM

Do you think the two would benefit from a completely flat bottom? Like adding the flat bottom panels and making a rear diffuser that covered the bottom of the engine bay? I feel like the side scoops would provide sufficient air flow for the engine (NA at least). Thoughts???

b.18tuner5875 · 07-22-2008, 01:44 PM

ive heard the air scoops actually disrupt the airflow coming in from the side vents. afaik, the side scoops bring the air and push it up towards the hood where it vents out, and the air coming in from the scoops just disrupt it. only benefit would probably be to make a custom airbox for your air filter directly connected to the scoop

Mark_Dorman · 07-22-2008, 02:58 PM

I was referring to the side vents when I said scoops...sorry for the confusion. I know having the air come in from two directions would cause some turbulence. I know that air does come up through the bottom of the engine bay and go out the engine cover...but if that was covered to improve underbody aerodynamics (reducing drag behind the car) and aid a little in down force do you think the side vents would provide enough air for the engine? I figured it would. And if you added a engine lid (see pic below) cover that help direct the incoming air towards the rear I think you could reduce the amount of airflow disruption caused by the "notch back???" design. I'm not a physicist so I couldn't say for sure but from my basic understanding of physics it seems logical.

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07-22-2008, 12:24 AM	#41 (permalink)
DenverMR2 Mr. Physics Join Date: Aug 2006 Location: Denver, CO Posts: 338 Thanks: 16 Thanked 22 Times in 22 Posts iTrader Rating: (0/0% )	Na I think it was performance and about photoshopped dyno sheet

07-22-2008, 12:50 AM	#42 (permalink)
Mark_Dorman The V6 Lives!!! Join Date: Apr 2008 Location: Pasadena, CA Posts: 4,272 Thanks: 79 Thanked 76 Times in 72 Posts Blog Entries: 1 iTrader Rating: (19/100% )	How low does your car actually have to be to benefit from a splitter? I parked next to an Lotus Elise this weekend and it wasn't much lower than your average dropped MR2...it's a good bit smaller though. If the lotus can benefit from a splitter and diffuser I don't see why the MR2 couldn't either.

07-22-2008, 01:01 AM	#43 (permalink)
Raptor13x Legendary Join Date: Apr 2006 Location: Farmington Hills, MI Posts: 4,001 Thanks: 7 Thanked 40 Times in 34 Posts My Google Map iTrader Rating: (5/100% )	^ Your car will probably benefit from a properly-designed splitter- it's just a matter of to what degree.

07-22-2008, 12:26 PM	#44 (permalink)
Mark_Dorman The V6 Lives!!! Join Date: Apr 2008 Location: Pasadena, CA Posts: 4,272 Thanks: 79 Thanked 76 Times in 72 Posts Blog Entries: 1 iTrader Rating: (19/100% )	Do you think the two would benefit from a completely flat bottom? Like adding the flat bottom panels and making a rear diffuser that covered the bottom of the engine bay? I feel like the side scoops would provide sufficient air flow for the engine (NA at least). Thoughts???

07-22-2008, 01:44 PM	#45 (permalink)
b.18tuner5875 Cage Fighter Join Date: Jun 2007 Location: Grand Rapids, Michigan Posts: 304 Thanks: 34 Thanked 11 Times in 10 Posts iTrader Rating: (2/100% )	ive heard the air scoops actually disrupt the airflow coming in from the side vents. afaik, the side scoops bring the air and push it up towards the hood where it vents out, and the air coming in from the scoops just disrupt it. only benefit would probably be to make a custom airbox for your air filter directly connected to the scoop

07-22-2008, 02:58 PM	#46 (permalink)
Mark_Dorman The V6 Lives!!! Join Date: Apr 2008 Location: Pasadena, CA Posts: 4,272 Thanks: 79 Thanked 76 Times in 72 Posts Blog Entries: 1 iTrader Rating: (19/100% )	I was referring to the side vents when I said scoops...sorry for the confusion. I know having the air come in from two directions would cause some turbulence. I know that air does come up through the bottom of the engine bay and go out the engine cover...but if that was covered to improve underbody aerodynamics (reducing drag behind the car) and aid a little in down force do you think the side vents would provide enough air for the engine? I figured it would. And if you added a engine lid (see pic below) cover that help direct the incoming air towards the rear I think you could reduce the amount of airflow disruption caused by the "notch back???" design. I'm not a physicist so I couldn't say for sure but from my basic understanding of physics it seems logical.