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fLat bottomed (girls) make the race car go round!!!

cool project. I always like to follow these custom parts threads! Keep posting up pics!

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Old 01-21-2016, 06:31 AM   #16 (permalink)
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cool project. I always like to follow these custom parts threads! Keep posting up pics!
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Old 01-21-2016, 08:04 AM   #17 (permalink)
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350/370's react quite well from an aero perspective to lots of rake....
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Old 01-21-2016, 09:01 AM   #18 (permalink)
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Well heres 15.2* and 8 fins then! Centers 10", next 2 are like 5.375", and outer 4 a like 7 something. Just something i picked. All are 100% parallel with each other so we'll go full scale with alumilite and test with string i guess.





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Old 01-21-2016, 09:35 AM   #19 (permalink)
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You should just leave it all cardboard.
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Old 01-21-2016, 10:17 AM   #20 (permalink)
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I like the Carbotech stickers on the bumper too. Just in case I didn't see one, there's another one to remind me.
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Old 01-21-2016, 12:33 PM   #21 (permalink)
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When you taking this thing to the track? You've been building it for 2yrs now, and haven't tested it on the track. I would have done one thing at a time to see if it made any improvements.
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Old 01-21-2016, 01:00 PM   #22 (permalink)
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Because its not done.

And im building this to be safe like all my past cars ive had on the local tracks.

And these projects cost nothing vs having to buy seats, belts, almost 2k wing, cage etc. rome wasnt built in a day and ive got expensive other hobbies.

Rusty ill make it to Pitt this summer. That 1:30's i saw must be killing you. You can tag along down into the teens with my draft. Ill slow it down some.
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Old 01-21-2016, 01:33 PM   #23 (permalink)
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Just wait until you get of of those spec Miata's running you down. You couldn't run with Bruce Sheldon and his Ford Pinto @ 01:10:584.

I can't wait to run the new section of track they built last year.
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Old 01-21-2016, 01:57 PM   #24 (permalink)
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Same here. Last time i was there was on my bike at a 1:03's. Im assuming unlike mid ohio where im faster in a car than on my bike, Pitts gonna be the opposite. Of course mid ohio does change the key ohio.
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Old 01-21-2016, 03:58 PM   #25 (permalink)
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Diffuser needs a curve, not flat-plane. You are trying to replicate the top surface of an aircraft wing. You "need" outside fences aligned fore/aft with the longitudinal centreline of the vehicle - just inboard of the tyres, so that "wash" around the inside of the tyre does not create turbulence in the diffuser

Would probably help to install maybe 3 or 4 more strakes to channel air as well.

I'll post a photo of mine to make this verbiage clearer.
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Old 01-21-2016, 04:14 PM   #26 (permalink)
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Yes please do
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Old 01-21-2016, 08:02 PM   #27 (permalink)
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I think he means something like these. These designs isolate turbulent air from the rear wheels, keeping the air under the car moving as fast as possible.







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Old 01-21-2016, 08:43 PM   #28 (permalink)
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https://youtu.be/pdAEHB5-CPU

You could make your own wind tunnel
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Old 01-22-2016, 06:10 AM   #29 (permalink)
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Yeah if you want a good car to study, under suzuki's s15 is one of the best.


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Old 01-22-2016, 02:02 PM   #30 (permalink)
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Flat diffusers work fine because we are interacting with the ground plane. Airfoil shapes are required when setting up relative pressure differences, but here we can work on a local pressure.

Now for angles:



From https://www.linkedin.com/pulse/how-d...eNoSplash=true

Enjoy
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