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Odd no where here did I read of the real reason behind a diffuser other than to look like a race car. I run them on my 15, ZO6 with the ZO7 package and I track it at Watkins Glens full track. I was told by a senior instructor friend that as your speed increases (we run 150 on the back stretch) a pocket of air develops under the rear of the car. This air pocket is a negative effect on all our aero we have trying to push the rear down. The diffuser helps move that air pocket out from under the car therefore allowing the body to settle more a positive effect.
Odd no where here did I read of the real reason behind a diffuser other than to look like a race car. I run them on my 15, ZO6 with the ZO7 package and I track it at Watkins Glens full track. I was told by a senior instructor friend that as your speed increases (we run 150 on the back stretch) a pocket of air develops under the rear of the car. This air pocket is a negative effect on all our aero we have trying to push the rear down. The diffuser helps move that air pocket out from under the car therefore allowing the body to settle more a positive effect.
Mine $79.00 per fin and 1 hour to install, done!
If your friend told you that, I'd get a new instructor. Google is your friend.
