Mythbuster: continuing project thread of my 1303 '75

[spannermanager]

Originally Posted by volkdent

Do you have the roof lip or just a naked body? I have the same very uncomfortable feeling as Wally, just wondering if you've got big kahunas and drive through it or just don't run into that problem.

Jason

Jason,sorry i missed your post up there, but to answer you, yes, i run it bare, running low is the secret, and lots of castor, i run it at 40mm as my regs dictate, a bit less actually, ive cut off or clearanced all the low points, and i also exploit the open deck technique, whereby the underflow air is used to flow into the normally turbulent air behind the car, killing drag and lift, you see it on many sports proto types etc, my deck lid and rear panel are massively vented to exhaust the airflow from over the motor, the deck lid hinge panel is gone for the same reason, the engine bay is also open to air, another huge plus for the wasser motor. does it work? well its a very stable platform,and i feel an outright win is on the cards next season. we'll see, there's no hiding place out there.

[graham]

Originally Posted by spannermanager

Jason,sorry i missed your post up there, but to answer you, yes, i run it bare, running low is the secret, and lots of castor, i run it at 40mm as my regs dictate, a bit less actually, ive cut off or clearanced all the low points, and i also exploit the open deck technique, whereby the underflow air is used to flow into the normally turbulent air behind the car, killing drag and lift, you see it on many sports proto types etc, my deck lid and rear panel are massively vented to exhaust the airflow from over the motor, the deck lid hinge panel is gone for the same reason, the engine bay is also open to air, another huge plus for the wasser motor. does it work? well its a very stable platform,and i feel an outright win is on the cards next season. we'll see, there's no hiding place out there.

Ive been following the latest comments here recently as I find the aerodynamics of a bug quite interesting.Have you got any pics of the rear or underside of your car Spannermanager.

[spannermanager]

Originally Posted by graham

Ive been following the latest comments here recently as I find the aerodynamics of a bug quite interesting.Have you got any pics of the rear or underside of your car Spannermanager.

Hi Mate, nothing with any detail, black just makes a lousy picture as all the detail is lost, this rear shot is curtesy of the apex festival,but its hard to see all the venting, the Red Maguire Imp is also exploiting open deck theories. I run various fairings underneath, all a bit crude as they get damaged often when running low to the deck, its smooth underneath all the way through to the rear torsion housing and rear ARB where there are more fairings, the ARB and mountings have to go next, Porsche style mounting is no good on a track car, its far too low, there are no jack points or lower 'a' arm shock mounts either, the a arms are flipped to improve the camber, nice and clean for the air, it will be flat bottomed right the way through over the winter, special parts are a pain in the butt when they get damaged!! you have to start all again, you also have to plan your hard points to jack the thing up quickly, and also carry ramps to meetings etc etc. I love it all tho', heres the Apex link,http://www.apexfestival.co.uk/event/Circuit_Racing.html

[Wally]

Just got back from Dyno-day (BTW 564 Nm = 418 lbs.ft) :