Fender vents - Page 2 - MR2 Owners Club Message Board
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post #21 of 36 (permalink) Old April 20th, 2007, 13:14
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As shallow as you can (+/- 2 degrees from flat)
so deeper in the front and just a shallow lift towards the rear, this will create a bit of low pressure that will help a great deal.

T
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post #22 of 36 (permalink) Old April 20th, 2007, 17:32
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Originally Posted by Tomg
As shallow as you can (+/- 2 degrees from flat)
so deeper in the front and just a shallow lift towards the rear, this will create a bit of low pressure that will help a great deal.

T
Excellent information! Good to know.


This is the current form of the car...


This is the way the car will be going, as you can see I will be altering the front bumper for a lower air foil and then a drop down piece made of flexible plastic a la C5 corvette from air dam. Then I will be creating a flat bottom panel piece to fit the shape.

here is a photoshop of the proposed idea.

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post #23 of 36 (permalink) Old April 18th, 2014, 15:30
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Smile fender vents, nose vents

so I've been looking for weeks for front fender vents and finally found something. I found days of reading about the engine bay vents....nothing about the front.

any pics of front fender pics or how and where they were placed on the Front fender?

I thought about having louvers stamped at the top of the fenders close to the cowl (3-4" forward) on the 45* surface. i would add vents /holes to the liner at the 2 o-clock(drivers) position to vent the wheel wells to the fender vents. has any one done something similar? pics?

would this be considered an aero mod? to reduce drag?

Last edited by corolla_alan; April 23rd, 2014 at 09:00. Reason: to help others find this thread
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post #24 of 36 (permalink) Old April 20th, 2014, 22:56
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Originally Posted by corolla_alan View Post
so I've been looking for weeks for front fender vents and finally found something. I found days of reading about the engine bay vents.......and i could care less.

any pics of front fender pics or how and where they were placed on the Front fender?

I thought about having louvers stamped at the top of the fenders close to the cowl (3-4" forward) on the 45* surface. i would add vents /holes to the liner at the 2 o-clock(drivers) position to vent the wheel wells to the fender vents. has any one done something similar? pics?

would this be considered an aero mod? to reduce drag?
If you follow what bill has said before on this subject you will get part of your answer. as for aero effectiveness you will need access to wind tunnel testing equipment/ a wind tunnel.

What I can tell you is:

1. Creates a low pressure area in the wheel well. (good)

2. Vents heated air out of the wheel well. (good)

how you go about doing it is up to you and what other info you can find.

A. This in turn reduces resistance (drag) that is built up in the wheel wells up front. Without proper ventilation your wheel wells are a high pressure area.

B. it also increases brake cooling efficiency. Supplement that if you want with ducting routed to provide air to cool the brakes (brake cooling ducts).

Either holes in the fender liner OR cutting out the section you wish the duct the air through the fender and applying a mesh will work, to what degree your particular idea will work I cannot tell you without actual wind tunnel data.

What bill did seems to work great for him though so I advise you try talking to him.
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post #25 of 36 (permalink) Old April 22nd, 2014, 09:29
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Originally Posted by MR2project View Post
If you follow what bill has said before on this subject you will get part of your answer. as for aero effectiveness you will need access to wind tunnel testing equipment/ a wind tunnel.

What I can tell you is:

1. Creates a low pressure area in the wheel well. (good)

2. Vents heated air out of the wheel well. (good)

how you go about doing it is up to you and what other info you can find.

A. This in turn reduces resistance (drag) that is built up in the wheel wells up front. Without proper ventilation your wheel wells are a high pressure area.

B. it also increases brake cooling efficiency. Supplement that if you want with ducting routed to provide air to cool the brakes (brake cooling ducts).

Either holes in the fender liner OR cutting out the section you wish the duct the air through the fender and applying a mesh will work, to what degree your particular idea will work I cannot tell you without actual wind tunnel data.

What bill did seems to work great for him though so I advise you try talking to him.
may this mod be called something else? is that why i cant find pics or other threads?
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post #26 of 36 (permalink) Old April 23rd, 2014, 07:03
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did both sides...








You could feel air flow being sucked in the holes in the front of the door where the wires go out for the power stuff in the door. So I knew that pressure was being built up in the fender, and being sucked into the lower pressure interior of the race car. So I cut the slots with an angle grinder and bent them with some flat vice grips. The flow stopped through the door.
This helps high pressure air build up, keeps well temps more towards ambient helping brake and tire temps.

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post #27 of 36 (permalink) Old April 23rd, 2014, 07:06
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here is another...

https://lh5.googleusercontent.com/-c...C0D7DC3311.JPG

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post #28 of 36 (permalink) Old April 23rd, 2014, 08:57
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link didn't work

thank you bill for the pics have you also tried this on a AW11?
here's a pic of my MK1a https://www.facebook.com/photo.php?f...type=3&theater

Last edited by corolla_alan; April 23rd, 2014 at 09:10.
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post #29 of 36 (permalink) Old April 23rd, 2014, 13:02
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i dont know why it isnt working. I tried 30 times to fix it. Google issue.
just shows the vents from the back.

On my MK1 race car I pulled the rear of the fender out so it overlapped the door front edge. You could also do what I did on the MK2

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post #30 of 36 (permalink) Old April 23rd, 2014, 14:18
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i do like the look of the vents on your mk2

what about vents on the headlight doors? would they help pull air from behind the bumper and around the fender liner?
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post #31 of 36 (permalink) Old April 24th, 2014, 06:35
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that would do nothing. the flow under the car is faster and can pull more air.

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post #32 of 36 (permalink) Old July 7th, 2014, 23:24
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here is my updated fender, rear part folded in, and top vents still in place... lift reduced, even with reduced splitter design


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post #33 of 36 (permalink) Old July 30th, 2014, 13:29
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fender liner vent

here's a few pics of my wheel well liner. 3/4" spacing between holes and a few rain drain holes at the bottom.

10526069_560231564100319_7819253345289456615_n.jpg

10526005_560231517433657_4854341614182166696_n.jpg

10458724_560231497433659_1923919410789187542_n.jpg

Last edited by corolla_alan; August 5th, 2014 at 03:40.
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post #34 of 36 (permalink) Old July 30th, 2014, 13:38
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here's a few pics of my wheel well liner. 3/4" spacing between holes and a few rain drain holes at the bottom.

Attachment 12922

Attachment 12930
Links don't work for me, I'm checking on my smart phone.
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post #35 of 36 (permalink) Old August 5th, 2014, 18:24
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Links don't work for me, I'm checking on my smart phone.
Do they work now?
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post #36 of 36 (permalink) Old August 5th, 2014, 21:28
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Do they work now?
Yes.
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