Jack
junkman
- Joined
- Jul 7, 2011
- Location
- The Ass Cheek Of History
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Pics????
Look at hypermileing 240s on google. There?s been a few.
Aero stuff makes a difference above 30 mph
the way the panels fit makes a huge difference. Your biggest gains will come from under the engine and smoothing out area behind the axle
Also the less holes in front of car the better ... ie gaps between headlights and turn signals (Look at a 240 vs 850 and then look up their drag coefficient all little things add up)
When you start modifying for aero your car will loose a lot of wind noise
One of the worse things on early cars are the roof drains.
Here?s some simple equations for aero stuff. Found this at my old school F1 engine builders shop
https://imgur.com/a/vwO72Yy?s=sms
I interpreted it as earlier car designs in general, not specifically early 240s.
Chicks dig down-force.[/QUOTE]
Did you just discover bing image search ?
F40 has a drag coefficient of .34.
850r sedan is at .29 (93 sedan is .34 which shows how much a little smoothing out with the right spoilers can do)
75 244 is .47
75 245 is .45
I know drip rails are great for making a bunch of wind noise on the highway..
Took a quick look under the car in storage and the exhaust/muffler is the lowest point in the rear. Might be able to pass under the axle, but not sure if its worth the effort.
Probably something I'll get started in March, unfortunately.
Good stuff there. I never realized how much benefit comes from lowering the car.
Stiggy Pop, do you have a rear spoiler? Assuming that the Group A cars were stable at speed, they could make a good pattern for a solution: smallish (for today) front lip and some rake to help keep air from going under the car, and a smallish (again, for today) rear spoiler to reduce lift at the back.
Some input here: https://scholarcommons.scu.edu/cgi/viewcontent.cgi?article=1000&context=mech_mstr
no spoiler, and unfortunately I'm unwilling to add one, or a splitter. Just not part of the car's aesthetic. I'll white knuckle it to 150 first
Looking at the bottom of the car I think the whole front 2/3 is going to be pretty straightforward. The exhaust/axle area will be fiddly.
Interesting that you went under the axle with your exhaust, what size pipe? I was thinking about splitting it down from 3" to 2) 1.75 or 2" pipes to go over the axle.