At what speed is aero a good idea?, New bumper for #209 Options

[Jetsetsurfshop]

Hey Paddock People,
My car sustained some pretty good front end damaged and the 916 front bumper is destroyed. Thinking this is a good time to change things up. Good news is that already bought the bumper half with the oil cooler cut out. Now I need the bottom half to finish it off.
The thought is should I run a splitter type valance? What is the speed where these cars want downforce? My car's top speed at Sebring is 115mph. I see a lot of HSR 914-6's that don't have a splitter and I know there are faster then I am.
Another thought is that I'm not the only driver of the car and when we have an off track experience, will the splitter still be there??
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[campbellcj]

I have that Sheridan spoiler as well and it's a great choice. Agree these cars get sketchy somewhere around 115-125 and mine gears-out around 133-135; for me, it was turn 8 at WSIR that got me thinking about at least a ducktail rear spoiler as well. So I have Roger's front and rear.

Note I found a significant reduction in brake cooling with this deep spoiler without hooking up cooling ducts so be cautious there. In fact a few times I switched back to a shallower one for this reason (also high curbs and ruts are an issue at some tracks). This month I'm going to try a true duct setup I never finished installing and it should solve that.