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Old 06-18-2022, 12:25 AM   #351 (permalink)
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The tuft next to the bottom on the back of the skirt is unaffected until 16 seconds. The bottom one follows the edge of the skirt. Maybe a teardrop skirt that tapers in plan?

Next round might be shorter, more closely spaced in the back half of the test area.
i was accelerating slowly up to 50mph in the video

the final product will probably be a little less bubbled out and closer to the wheels. ill be building a different frame and trying to maintain the one inch clearance. less sharp curves in the front and back, and then some type of flaring skirt in the rear bottom left

im assuming that even with the bulgy rear wheel spats, based on the overall mostly attached tufts, that it should be reducing drag versus know wheel covers correct?

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Old 06-18-2022, 11:22 AM   #352 (permalink)
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I haven't heard of fender skirts making things worse. Until you need to change a tire.
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Old 06-18-2022, 11:50 AM   #353 (permalink)
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I haven't heard of fender skirts making things worse. Until you need to change a tire.
Im going to make them easy to take off or put on. Not like Im welding the skirt straight into the frame permanently lol
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Old 06-18-2022, 06:31 PM   #354 (permalink)
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A thick aluminum sheet that’s a few inches from the muffler in the rear should be safe right?
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Old 06-18-2022, 09:30 PM   #355 (permalink)
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A thick aluminum sheet thats a few inches from the muffler in the rear should be safe right?
Hey Phase!

I did a lot of research on cat shields (since I installed two of them on Champrius recently). All of them have slits / louvres / some kind of airflow through the shield. So while I don't think there's any danger to the aluminum sheet (melting point is 1200F or somesuch), there's probably some engineering reason to make sure there is still airflow around the cat / muffler / hot stuff.

Anyhoo, it might be helpful to look at different cat shields to get an idea:
https://catshield.com/products/2004-...n-2-cat-shield
Most of them seem to have around 10%-ish of the area devoted to airflow.

Hope this helps!
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Old 06-18-2022, 10:48 PM   #356 (permalink)
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Quote:
Originally Posted by Talos Woten View Post
Hey Phase!

I did a lot of research on cat shields (since I installed two of them on Champrius recently). All of them have slits / louvres / some kind of airflow through the shield. So while I don't think there's any danger to the aluminum sheet (melting point is 1200F or somesuch), there's probably some engineering reason to make sure there is still airflow around the cat / muffler / hot stuff.

Anyhoo, it might be helpful to look at different cat shields to get an idea:
https://catshield.com/products/2004-...n-2-cat-shield
Most of them seem to have around 10%-ish of the area devoted to airflow.

Hope this helps!
i just ordered this- Falken Design 36 in. x 72 in. x 1/8 in. Thick Aluminum Composite ACM Brushed Silver Sheet


its pretty much stiff dibond. ill be cutting out venting around the muffler

will need a way to drill into body panel to attach it

will be using welding tools or heat gun to add a slight 10 degree curve towards the end and then will build a rear diffuser from there
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Old 06-19-2022, 12:14 AM   #357 (permalink)
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will be using welding tools or heat gun to add a slight 10 degree curve towards the end
Why? That could anneal the metal, and possibly discolor it. A brake or roller could work it cold.

Is the curve on the 72" dimension?
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Old 06-19-2022, 12:57 AM   #358 (permalink)
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Why? That could anneal the metal, and possibly discolor it. A brake or roller could work it cold.

Is the curve on the 72" dimension?
well idc about color too much since itll be under the car

and yeah itll be along the long ways

the rear panel only need to be 60 inches, but 72 was the only size above 48 they had

im going to be redoing my front undertray/splash pad thats been torn up from hitting parking curbs and road debris

heres my full order

Falken Design 36 in. x 72 in. x 1/8 in. Thick Aluminum Composite ACM Brushed Silver Sheet ( rear under try)
Falken Design 24 in. x 36 in. x 1/8 in. Thick Aluminum Composite ACM Black Sheet (2) ( rear fender skirts)
Falken Design 48 in. x 96 in. x 0.125 in. Thick Acrylic Black Opaque Sheet

( home depot didnt have abs plastic but this should be good enough i think- front under tray will be smoother with less venting holes, and also will cover more surface area under the car. will probably use left over plastic to build a rear diffuser extension inspired by the mercedes eqxx vision car)
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Old 06-19-2022, 01:45 AM   #359 (permalink)
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The heat gun could be handy for the ABS. If I had 'welding equipment' I'd probably pass in favor of a MAP gas cylinder. I'd probably blow a hole in the sheet.

Cut the 60" dimension first (of course).

I cut a ABS scrap to size for a splitter in the Metro, 8x60". I'll be less busy in a week. It will have a chamfer like we've talked about, The radiator brace is the lowest point, which is nice.
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Old 06-19-2022, 01:51 AM   #360 (permalink)
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Quote:
Originally Posted by freebeard View Post
The heat gun could be handy for the ABS. If I had 'welding equipment' I'd probably pass in favor of a MAP gas cylinder. I'd probably blow a hole in the sheet.

Cut the 60" dimension first (of course).

I cut a ABS scrap to size for a splitter in the Metro, 8x60". I'll be less busy in a week. It will have a chamfer like we've talked about, The radiator brace is the lowest point, which is nice.
well im going to arizona for 4th of july weekend and trying to do all of this in one day with the help of my girlfriends car and welding family. they just have tons of welding tools and actual car ramps to get underneath so itll be easier

any suggestions on also trying to slightly curve the dibond metal sheets for the side rear skirts? i still have to curve those too like the cardboard i did

i doubt they have any rollers or what you mentioned

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