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Race Prep Miata race-only chat. 949 Racing - Rim & tires

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Old 04-19-2016, 04:02 PM   #1121
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Thanks man, I'm pretty excited with how it turned out. We'll see how well it performs on the track this weekend.
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Old 04-19-2016, 10:26 PM   #1122
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only thing I don't like about the Lotus diffusers is their outer channels are pretty much worthless due to tire squirt contaminating the airflow.
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Old 04-20-2016, 04:09 AM   #1123
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Quote:
Originally Posted by motormechanic View Post
only thing I don't like about the Lotus diffusers is their outer channels are pretty much worthless due to tire squirt contaminating the airflow.
What's tire squirt? As in the air that's being directed off the tires?
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Old 04-20-2016, 04:49 PM   #1124
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it is the turbulent air that is a result of the rotating tire moving through it. There is a way to fix it though, and that would be to add a fence to the outside edge of the channels that extends forward.

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Old 04-20-2016, 07:00 PM   #1125
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A fence? What do you mean? Sorry for my lack of knowledge, I'm basically clueless when it comes to aero. I'm assuming I just make some sort of an extension on the outter sides to kind of block out the turbulence?
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Old 04-21-2016, 02:12 AM   #1126
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correct, extend the outside fin further downward and forward.
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Old 04-21-2016, 02:38 AM   #1127
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Right on, I'm assuming just riveting a sheet of aluminum should work fine?
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Old 04-21-2016, 10:26 PM   #1128
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yup
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Old 04-22-2016, 03:11 AM   #1129
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Old 04-22-2016, 03:52 AM   #1130
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just spotted on facebook
https://www.facebook.com/Backyardcivics/




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Old 04-22-2016, 04:29 AM   #1131
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Wow that looks great, if only I had enough power to fully utilize all that down force.
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Old 04-22-2016, 10:19 AM   #1132
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Going to suck when you bend that up going 4 off.
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Old 04-22-2016, 11:50 AM   #1133
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Quote:
Originally Posted by FatKao View Post
Going to suck when you bend that up going 4 off.
That was my first thought. I try and build in a weak point for those occasions, and when I look again at that design, I think the weak point is the lower part attached to the splitter, where the round hole is. Just unbolt, apply a BFH, and it should straighten enough to work ok if not win a beauty contest.
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Old 04-22-2016, 01:33 PM   #1134
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Quote:
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Going to suck when you bend that up going 4 off.
Ouch that's a good point, I didn't even think about that.
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Old 04-22-2016, 04:57 PM   #1135
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needs more center/frontal support.
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Old 04-23-2016, 12:11 AM   #1136
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Almost finished my aero setup for this year! Should try it tomorrow to see if I need a center brace for the spoiler.









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Old 04-23-2016, 09:32 AM   #1137
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Took me a second to realize the garage door hinges weren't part of the spoiler, LOL.
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Old 04-25-2016, 01:44 AM   #1138
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Quote:
Originally Posted by Dalardan View Post
Almost finished my aero setup for this year! Should try it tomorrow to see if I need a center brace for the spoiler.









That air dam looks nice, what'd you make it out of?
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Took me a second to realize the garage door hinges weren't part of the spoiler, LOL.
LOL same here
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Old 04-25-2016, 08:05 AM   #1139
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Couldn't find some localy or from sponsors, so got it from there :

Colored Plastic Rolls, 10 Ft.
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Old 04-25-2016, 11:05 AM   #1140
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Allstar 24" sheet plastic, which is wide enough for a Miata air dam. Comes in a roll. .070 is not quite stiff enough for air dams, use the .100. Google search, it's everywhere.

http://ecx.images-amazon.com/images/...L._SL1500_.jpg


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