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thedoc
thedoc GRM+ Memberand Reader
11/28/20 5:33 a.m.

In reply to dean1484 :

Wow, my thoughts exactly.  I go in thinking it's a joke, only to be overwhelmed with knowledge and skill.

Purple Frog (Forum Supporter)
Purple Frog (Forum Supporter) GRM+ Memberand Reader
11/28/20 8:32 a.m.

Been there, done that.    Mid engine.

Exhaust runs through chassis and suspension.

NOT A TA
NOT A TA SuperDork
11/28/20 10:32 a.m.

Here's the one I've been working on. It's just one part of a combination of modifications I'm hoping will reduce lift as a package.

[URL=https://app.photobucket.com/u/NOTATA/a/ac949837-2452-4f6a-b3a7-1455f6a2f0b0/p/d11e461d-33f5-4340-ae70-108b33397a54][/URL]

[URL=https://app.photobucket.com/u/NOTATA/a/ac949837-2452-4f6a-b3a7-1455f6a2f0b0/p/b306c2e6-f818-4b50-9191-8af8efe123af][/URL]

Johnny_at_NineLives
Johnny_at_NineLives GRM+ Memberand New Reader
11/28/20 11:25 a.m.

In reply to NOT A TA :

you can use about 1/16 of the mounting points you have on that splitter and it will be just as strong. 

Johnny_at_NineLives
Johnny_at_NineLives GRM+ Memberand New Reader
11/28/20 11:39 a.m.
Crackers said:

What considerations need to be made if I want to add a diffuser later? 

It looks like some kind of side skirt is needed to funnel/guide air under the car, but how deep? 

Are skirts necessary, period, or does that only apply to when using a diffuser? 

Can a flat bottom make a car worse if done wrong? Any examples, I can learn from?

Thanks all!

hit these questions in order. 
1, you'll want a diffuser. even a very simple one would benefit you. don't go nuts as with a flat floor a diffuser will be happy to work. just make sure you include strifes (vortex generators) as they help keep the air attached. 
2 Side skirts aren't needed. most GT3 cars add them to do 2 things. 1 that's usually where they put the side pipes to keep heat away. 2 they make the floor wider and that helps speed air under the car. remember downforce is made by "fast air under, slow air over". so make them as wide as you can stand.  
3 Skirts, like real skirts that touch the ground. those mythical things used and outlawed in F1. help formula cars a lot by stopping turbulent air caused by the tires from messing with the ground effects. unfortunately, on GT cars the wheel wake is substantially less and the skirts are outboard, meaning they won't control the wheel wake the way they do on F! cars. so don't worry  
4 not really, they are almost always good. 

 

NOT A TA
NOT A TA SuperDork
11/28/20 12:04 p.m.

In reply to Johnny_at_NineLives :

I've got a lot more going on there than would appear at a quick glance. There are 10 points where the splitter section connects to the vehicle. As seen in the pic it's over built only for testing to allow quick changes to different length plywood sections of the splitter. I can stand on the splitter when it's attached to the car. For me it's a learning tool, I have nothing to win.

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