Big Wings: Helpful or hurtful? What's your opinion?

[M3SQRD]

Originally Posted by bigjae1976

Something I found is that the material can make a big difference. I went from a plywood to a carbon splitter, both were the exact same size with the same mounting. The carbon splitter changed the balance from understeer to oversteer.

This suggests the increase in aero efficiency of the front CF splitter moved the COP forward of the COG. Does the CF version have a better leading edge radius than the plywood version?

[bigjae1976]

Originally Posted by M3SQRD

This suggests the increase in aero efficiency of the front CF splitter moved the COP forward of the COG. Does the CF version have a better leading edge radius than the plywood version?

Similar. Easier on the plywood with a router vs trying to chamfer foam.

It had to do with the stiffness. The plywood would cause the front of the car to porpoise at 140mph (quite scary) because the plywood would flutter.

I’m sure the front of the plywood splitter would be pushed down at speed instead of the front end.

[M3SQRD]

Originally Posted by bigjae1976

Similar. Easier on the plywood with a router vs trying to chamfer foam.

It had to do with the stiffness. The plywood would cause the front of the car to porpoise at 140mph (quite scary) because the plywood would flutter.

I’m sure the front of the plywood splitter would be pushed down at speed instead of the front end.

WOW! That does sound scary! How did you determine it was the plywood vibrating at 140 mph and causing the porpoising? Could you hear it?

[bigjae1976]

Originally Posted by M3SQRD

WOW! That does sound scary! How did you determine it was the plywood vibrating at 140 mph and causing the porpoising? Could you hear it?

It was insane. The bouncing was so bad that the splitter was really the only plausible thing it could be.

[M3SQRD]

Originally Posted by bigjae1976

It was insane. The bouncing was so bad that the splitter was really the only plausible thing it could be.

That would have resulted in a major shunt if that thing had failed mid-corner!

[nickauger]

Just My 2cent but i ve run an e90 without aero and was getting 220kmh in the stretch, after gt4 lip and apr gt250 61" i'm now getting between 210 and 212 on same stretch but feeling more confident in high speed curve get me better lap time.