question about drag racing

[Curly1]

Yes I think the rear spoiler on the Pro Stock cars is only for aerodynamics. On Pro Stock I do not think any down force is needed. Most of their traction problems is in the first 60 feet unless they get out of the "Groove".

I would like to know if the little flat spoiler on your car helps or hurts the aero on the car. I know it would not be a huge difference but many factory style spoilers actually hurt mileage and top speed. I am considering putting a similar one on my HHR but will not do anything that may hurt it even if it is only just a little. I would not want to spend $250 dollars to lose 1/2 MPG.
I like the way it looks so if it is better even marginally I would put one on.

[GasSavers_RoadWarrior]

On an HHR you probably need a "whale tail" halfway down the back and a deflector up top.

[GasSavers_BEEF]

test of pic


bam, it works

[DRW]

Here's more pics showing a Ford Fusion going for a record top speed at the Bonneville salt flats. It also has a flat extension attached to the trunk.

http://www.autobloggreen.com/2007/08...at-bonneville/

You could also do some tuft testing on your rear window to see if airflow remains attached all the way to the back, or if it separates before the spoiler. This would be easy to do since you could see the tufts in the rearview mirror while driving. Just use a few pieces of string 5 to 6" long, and duct tape them in various locations.

[GasSavers_BEEF]

yea, I kind of dropped the idea because I have no time.

I haven't even been able to stay on here as long as I would like. work is getting a little crazy so I don't see much daylight, especially with daylight savings time and all.

I may revisit this when I get more time but for now, I am just going to enjoy the relatively low gas prices and drive with what I have. it has still yielded me over 38 mpg for my best tank.

[VetteOwner]

just an FYI most stock spoilers are for purely looks (hence usually on sport/high up submodel list cars)

[GasSavers_BEEF]

my spoiler has the 3rd light in it and is very low profile and unlike most, there is no gap between the spoiler and the car.

I am not saying that it is any better because of it but it isn't the gargantuan thing that aftermarket people put on the mustangs and hondas.

also, it is a stock spoiler (and yes, it is probably just for looks)