Saturn Ion aero...

[19bonestock88]

To be honest, I don’t think 4” is enough to match the template but I don’t know for sure whether or not it’ll help... I didn’t figure that any longer an extension would hold itself up, and would have required more brackets/gussets... however so far I hadn’t discovered any big difference between with the extension and without

[freebeard]

If it extends aft of the bumper, problems increase. If you can back into a post and the bumper touches first, I'd stop there.

[19bonestock88]

I think I’m just barely out to the bumper, or if not it’s really close... so far I can’t tell a loss of mileage from the spoiler... could have made a slight gain but hard to tell... haven’t done any controlled ABA coastdown testing but it seems that I can coast a *little* further, based on the coast points on my commut... I have yet to gather any accurate load test data(hard to hold steady throttle at 55mph) I really need a hand throttle for such testing, as the low throttle angle (<25% load) is really hard to hold while wearing steel toed boots

[19bonestock88]

Wow, I’m necro-posting a six month old thread, but I found a video which has some relevance to the subject...

https://youtu.be/U-Rh-GAd94Q

[kach22i]

Originally Posted by 19bonestock88

Wow, I’m necro-posting a six month old thread, but I found a video which has some relevance to the subject...

https://youtu.be/U-Rh-GAd94Q

Rather disappointing aerodynamics, isn't it?

[19bonestock88]

It’s sad how bad it is... the air separates right at the apex of the roof and the mirrors appeared horrible (*makes mental note to delete them*)...

Perhaps a vortex generator array would help some, but I feel it would look majorly out of place 6-8” above the back glass...