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v8bloke
Original Poster
130 posts
80 months
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Hi all, I have just fitted a proper rear wing to my track car and would like some feedback from those of you that run with a wing. Car weighs 970kg with 52%/48% front/rear distribution. Making 330bhp+ with torque to match. Also fitting a front splitter. Tested on the road (rear wing only) up to 70mph and it feels Ok with no noticable difference to balance. My thinking was to keep the wing forward above the rear of the back tyres.     Cheers Mark
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mmm-five
5,903 posts
153 months
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There was an excellent article in this month's TrackDriver magazine where the writer used some simple CFD software to test his hypotheses on various wings/positions.
You can sign up for a free electronic/print subscription if you want to read it.
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RenesisEvo
1,834 posts
88 months
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The rear wing seems to be sitting in the right place IMO with regards to getting good flow to it, not in the wake of the roof/rear hatch which would make it less effective (a far too common mistake), however placing it further rearwards gives you more 'leverage' over the rear wheels with what downforce it does make. The front splitter will be important to tune/maintain the balance of the car's aerodynamics. It has to be said - without proper testing it's really hard to know the effect on balance. Furthermore, the wing may be generating downforce (although not a huge amount as the angle of attack and camber are not too aggressive), but overall the car as a whole may still be generating lift at high speeds, perhaps just less than before. Aero really only starts to be relevant above 40-50mph (when it exceeds rolling resistance), so at 70mph the effect will probably be small. Hopefully at three-figure speeds you will see some difference. If you find the balance too far forward (i.e. rear gets loose), take a strip of carbon flatstock or chunky plastic with you to add onto the rear wing as a gurney flap to help tune as a short-term quick fix.
You will add drag, obviously - although you seem to have enough power to overcome the modest amount added. But underflooor/diffuser treatments are generally much more efficient and beneficial than sticking large aerofoils on the car. All IMO of course - your mileage may vary, please seek professional advice before committing to a high-speed corner hoping that a wing will provide 10mph more apex speed etc. etc.
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wellground
168 posts
53 months
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It looks a handy place to eat your sandwiches from on a track day, have you got a bench that goes with it ;o))
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v8bloke
Original Poster
130 posts
80 months
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could be half of a ladder rack maybe?
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noone986s
273 posts
82 months
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Your car looks fantastic, love the MGB. I run a Mk3 Toyota Mr2 as my track day car and was having stability problems above 80mph, the front end was the main problem. Increased track 50mm rear and 25mm front, a rear wing and front splitter that goes back under the car have made a big difference. I am at ~930Kg but only have 201hp and 145lbft (it has a built/tuned 2zz-GE engine from an Exige). Since the changes the car has been much more stable and I am very happy with the improvements. The wing is an APR carbon one with carbon gurney (sp?) flap. I think at the moment it is too low and should be a bit higher in the airstream, its on the list to look at over winter   sorry if the picture looks huge, cant work out how to reduce it in the IMG tag
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playalistic
1,528 posts
33 months
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noone986s said: sorry if the picture looks huge, cant work out how to reduce it in the IMG tag I'm sure I saw this car in Reading recently, was it you?!
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noone986s
273 posts
82 months
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Nope, it is not road legal anymore and I am in Cheshire
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v8bloke
Original Poster
130 posts
80 months
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Nice looking MR2. My splitter is nearly finished, First test for mine is Trax Silverstone on 2nd Sept. have three sessions in the advanced group.
Mark
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MiloD
169 posts
71 months
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noone986s said: Nope, it is not road legal anymore and I am in Cheshire You checked your garage in the last few days?! Lol
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