[Peter D]

Iain, that looks really nice & I reckon that it will be very helpful with front-end down-force.

Some interesting analogies might be drawn from GM's experience in the development of the C3 Corvettes (68 onwards) using the earlier C2 (early 60's) models as a benchmark :

- 1965 C2 (no front or rear spoilers) needed 155 bhp to move it at 120 mph - body lifted 2.75" front & 0.5" at rear.

- 1968 prototype C3 (Kamm tail & rear lip spoiler) need 210 bhp to move it at 120 mph - body lifted 3" at front !!, but only 0.25" at rear.

- Cutting vents in the front fenders behind the wheels reduced the 120 mph horsepower to 175, with minimal change in lift.

- Adding a chin spoiler reduced the horsepower required to 105 !!, and reduced the front body lift to only 0.5". Not a bad gain for a $50 bit of plastic !!

Admittedly, this data really only relates to Corvettes, but it would not be unreasonable to conclude that a chin spoiler and adequate "under front-clip venting" might also have a fairly significant effect on a GT40 (known for front-end lift).

Your chin spoiler should address one part of the issue, but what about venting ? I notice that you have the twin nostrils - do these go right down to the bottom of the radiator ? Also, no front air vents either side of the rad intake - any plans for these to cool the brakes or vent frontal air into the wheel arches ?

Nice work mate.

Kind Regards,

Peter D.