C5 corvette

[MetroMPG]

Originally Posted by DonR

He claims in the neighborhood of 2-3 mpg increase. Which if true, should help in both departments.

I would be red-alert skeptical of any testimonials on a retail web site.

[theunchosen]

I pretty highly doubt it would have a drastic effect on FE. 2-3 is 10% in the vettes FE range. I am a little dubious about how effective vortex could be to generate less drag, but on the same token I take it its effectively like a heat pump. Its easier to make a temperature difference(cooling one side and heating another) than just convert electricity to heat(resistance heating), so its easier to shift around the pressure a little to achieve less drag?

[MetroMPG]

I saw zero change in fuel economy in A-B-A testing of AirTabs at both the trailing edge of a sedan roof and trailing edge (roof and sides) of a minivan:

[theunchosen]

Now that I have had time to rethink it, create a vortex doesn't do you any good unless somehow you can pick and chose and make sure the low pressure goes away from your car and the high fills the vacuum at your rear.

There is not anyway to do that without inducing as much drag as you would save by redirecting each of the flows.

[Big Dave]

Dremd asked if I was serious. Serious as a heart attack, dude. It has already been done. See Post #15. This ol’ boy put a 6.5 NA diesel in a older ‘Vette. He even only was half-hearted about MPG because he stuck with the wasteful old TH400 automatic, but he still got 48 MPG.

I work with a guy with a C5 and talked him into running a tank doing some (reluctant) hypermiling. He has the LS1 engine and a T-56 and really just coasting to lights got him a thankful at 31 MPG. The old 6.5 ‘Vette automatic rig got well better than a 25% improvement over a six-speed gas-pig. Diesels are that much more efficient than gassers.

6.5s weigh about as much as a 454 and there are literally thousands of 454 ‘Vettes running around. A 6.5 takes up about the same space as a small-block, but you might have to remote-mount the turbo or batteries.

A diesel ‘Vette is a very doable project and will give you excellent MPG, but certainly do not think you’ll have the acceleration of an LS1.

[DonR]

Originally Posted by MetroMPG

I would be red-alert skeptical of any testimonials on a retail web site.

I added what I did because he asked a direct question. It was also the same car that he has. I don't know if his is a convertible or not.