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Tracking / Autocross / HPDE / Drifting What these cars were built for!


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Old 08-26-2015, 08:34 PM   #43
mav1178
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Originally Posted by philooo View Post
hummm, after looking at Keith Charmonia build and seeing the roll bar mounted to the floor right behind the seat. I can only conclude that he is all show and no go. Mounting the cage at this location is a recipe for disaster in case of roll over the bar would perforate the floor and become useless...
Only an issue if you don't use proper sandwich plates or don't reinforce the chassis w/ a welded base plate.

http://www.summitracing.com/parts/ce...IM4aAl1g8P8HAQ
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Old 08-26-2015, 09:48 PM   #44
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Only an issue if you don't use proper sandwich plates or don't reinforce the chassis w/ a welded base plate.

http://www.summitracing.com/parts/ce...IM4aAl1g8P8HAQ
Exactly. Like when I posted those photos in the other thread.

I wouldn't let those guys touch my car. (Local Tulsa shop)
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Old 09-02-2015, 02:10 AM   #45
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[URL=http://s616.photobucket.com/user/omacintosh/media/IMG_2300.jpg.html][/URL
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Old 09-24-2015, 02:25 AM   #46
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Made my custom diffuser



strakes added


painted black
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Old 09-29-2015, 01:12 PM   #47
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Does anyone have pics of the Version: Select diffuser installed?

http://www.frsport.com/Version-Selec...Z_p_62305.html
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Old 09-29-2015, 01:46 PM   #48
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GGOD LORD !!

[QUOTE=Packofcrows;2336321]
HOLY 50 SHADES OF BLUE BALLS !!!
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Old 09-29-2015, 02:18 PM   #49
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I like this one the most...its subtle...The only thing I would change is bending the ends up more to be inline with bumper.

Last edited by kurbkilla; 09-29-2015 at 04:55 PM.
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Old 09-29-2015, 05:44 PM   #50
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If the angle is too steep you end up with flow separation.
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Old 09-30-2015, 01:51 AM   #51
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Our Pink Ribbon Racing NASA Time Trial BRZ with Driveway Labs @Wonderbar Type 3 Diffuser... on track... where it belongs. I had a 95mph off (way, way off track) through the dirt at Miller Motorsports Park this weekend with no damage to the diffuser.

I stress test components to the max!!! JRSC, 4000ft elevation, 100 degree weather, pushing the car to the limit and beyond.

2015-09-29_11-48-40 by zdr93523, on Flickr
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Old 09-30-2015, 12:01 PM   #52
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Quote:
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If the angle is too steep you end up with flow separation.
Don't you have separation regardless, unless you bring the trunk and diffuser to a point.
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Old 09-30-2015, 01:56 PM   #53
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Don't you have separation regardless, unless you bring the trunk and diffuser to a point.
Yes, but, if you have ramp the angle up too steep then you get flow separation occuring within the diffuser which lowers the effective area of it.
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Old 09-30-2015, 03:32 PM   #54
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Quote:
Originally Posted by Lee View Post
Yes, but, if you have ramp the angle up too steep then you get flow separation occuring within the diffuser which lowers the effective area of it.
7-10 degrees is ideal, anything else is not ideal and can lead to stalling of the diffuser. For us non-engineer types, that's really all you need to know.
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Old 09-30-2015, 08:35 PM   #55
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7-10 degrees is ideal, anything else is not ideal and can lead to stalling of the diffuser. For us non-engineer types, that's really all you need to know.
Mine just happens to be around 6 degrees
So I'm happy
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Old 09-30-2015, 08:37 PM   #56
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Quote:
Originally Posted by kurbkilla View Post
I like this one the most...its subtle...The only thing I would change is bending the ends up more to be inline with bumper.
My plan was to make it look as oem as possible , yet still have some sort of function
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