E30 Aerodynamics

[TheDirtyS54Thirty]

Uhhhhhh.......UUC fronts and stock rears with G-loc pads......LOL.

Talking to Lee at Massive right now about upgrade options. She doesn't stop well.

Dude I feel your pain, I have rx7 calipers and stock brakes in the rear and I can barely stop with just the S54.

[LateFan]

Stopping is good.

http://www.r3vlimited.com/board/showthread.php?t=406490&highlight=holly

[RoccoB517]

you're crazy ha! PS: what brakes set up are you running?

Uhhhhhh.......UUC fronts and stock rears with G-loc pads......LOL.

Talking to Lee at Massive right now about upgrade options. She doesn't stop well.

[TheDirtyS54Thirty]

The aero really helps. Before the flat bottom and diffuser !45-150 was hairy. It is pretty stable over 160 now, but it still feels like something you shouldn't be doing. At any rate, the limiter in 5th doesn't lie. I had more than 50 yards of track left, so with lower gearing, who knows? I'm not going there, though. Especially living that 4 lug lyfe.

you're crazy ha! PS: what brakes set up are you running?

[RoccoB517]

Who knew one of these bricks could go that fast?! Ever consider racing old Volvos?

Did it try to take off at that point?


I remember as a kid reading my road & track, when the Ferrari Daytona came out it could do 175 stock out of the box. "NO. F-ing. Way." we all said to each other.

The aero really helps. Before the flat bottom and diffuser !45-150 was hairy. It is pretty stable over 160 now, but it still feels like something you shouldn't be doing. At any rate, the limiter in 5th doesn't lie. I had more than 50 yards of track left, so with lower gearing, who knows? I'm not going there, though. Especially living that 4 lug lyfe.

[RoccoB517]

That's intense. Was the wing normally more inclined?

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No, I typically have run a low angle of attack. The straight line speed is what I seem to need in this chassis. The tires have always done the work in the corners. I am changing the profile and going slightly larger this time. I can afford a little more drag now. ;D

[LateFan]

Who knew one of these bricks could go that fast?! Ever consider racing old Volvos?

Did it try to take off at that point?


I remember as a kid reading my road & track, when the Ferrari Daytona came out it could do 175 stock out of the box. "NO. F-ing. Way." we all said to each other.

[2mAn]

Damn 175mph!?! Going where no E30 has gone before...

[squidmaster]

That's intense. Was the wing normally more inclined?

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[Sh3rpak!ng]

Jesus christ that's wild. Also crazy fast in an e30

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[RoccoB517]

This is the only one I can find. This happened at approx 175 mph as the car transitioned into the downhill braking zone leading into turn 10a at Road Atlanta. I had the wing for 3 years with no issues, but that is the first time the car has gone this fast. The wing was a plain weave carbon leading edge with two layers of unidirectional carbon followed by 5 layers of fiberglass cloth, cured under vacuum. I didn't notice and stress cracking or anything following the event, and had recently done shake down testing up to 140 or so without issue. My gurney flap you see there is 1/8" thick aluminum angle, and it bent like it was nothing. The top plates on the wing upright are bent also.

Next wing will have solid carbon spars and will be several layers of carbon twill over uniweave. Live and learn.

[Sh3rpak!ng]

So an interesting follow up from me here. I took my car to Road Atlanta with the new drivetrain and managed to exceed my previous top speed by quite a lot on the long back straight. This promptly broke the end off of my wing and tore the 1" fender washers clean through my 16 gauge aluminum flat bottom. Back to the drawing board on these items, but holy crap the force must have been massive to do those things.

Pictures?

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[vpilarrt]

When you weld metal the heat effected zone (which can be quite large on aluminum since it conducts heat so well) returns to as-forged strength. Assuming you used 2024 it would take 495 lbs of drag on the wing to tear out a 1" diameter x .0625" thick plug in the bottom of the support. I eyeballed your setup to have a 5:1 height (of wing above the bottom of the support) vs width (of the bottom of the support) which give a 500% mechanical advantage to the load due to drag.

[RoccoB517]

So an interesting follow up from me here. I took my car to Road Atlanta with the new drivetrain and managed to exceed my previous top speed by quite a lot on the long back straight. This promptly broke the end off of my wing and tore the 1" fender washers clean through my 16 gauge aluminum flat bottom. Back to the drawing board on these items, but holy crap the force must have been massive to do those things.

[TheDirtyS54Thirty]

If nothing else it looks very serious. Had a chance to test it out yet?

Although not the greatest track to be testing the aero to its full potential, Ill be tracking this Saturday.