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Sven7 · 05-09-2012, 01:29 AM

Turbulators (which I'm guessing are essentially vortex generators) will work against your cause. You want smooth airflow- the point of the boat tail is to reduce turbulence as far back as possible. With the 20* angles and generous radii you should have attached, smooth flow the whole way back without issue. Tuft test to make sure.

Also be sure you make a belly pan to lead up to the boat tail to take more advantage of its benefits. You want the tail to continue smooth airflow, not start it. If you have turbulent air coming onto the tail, whether from VG's or a dirty under body, it will not work as well as it could.

05-09-2012, 01:29 AM	#4 (permalink)
Sven7 Master EcoModder Join Date: Aug 2011 Location: Warren, MI Posts: 2,456 Boo Radley - '65 Ford F100 90 day: 13.28 mpg (US) Thanks: 782 Thanked 669 Times in 411 Posts	Turbulators (which I'm guessing are essentially vortex generators) will work *against* your cause. You want smooth airflow- the point of the boat tail is to reduce turbulence as far back as possible. With the 20* angles and generous radii you should have attached, smooth flow the whole way back without issue. Tuft test to make sure. Also be sure you make a belly pan to lead up to the boat tail to take more advantage of its benefits. You want the tail to continue smooth airflow, not start it. If you have turbulent air coming onto the tail, whether from VG's or a dirty under body, it will not work as well as it could. __________________ He gave me a dollar. A blood-soaked dollar. I cannot get the spot out but it's okay; It still works in the store Last edited by Sven7; 05-09-2012 at 01:34 AM..