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#1
04-01-2013
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best shell for downforce
i have tried a 12th circuit shell on my dave years ago and it was great. planning to race my dave again circuit so do people have a prefered shell?
not looks more down force is what im after, i was thinking either the ascari or the lotus..,... But will rather take advise on whats best 
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#3
04-01-2013
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Mike,
The four most common shells for circuit racing are the Lotus, Ascari, Mazda and the GT "Wedge". The Mazda is aerodynamically the most balanced and safest shell when driven on the track. It's wide, flat windscreen, blunt nose and big wing push the aero grip well towards the rear to make it extremely neutral. It is a good all round shell, especially for beginners and club running but is not legal for Nationals. The Lotus gives more front end aero grip. The windscreen is steeper and positioned further forwards so this gives a car that handles with more front end. It is significantly heavier than the Mazda though, and taller, and some think that this can promote more grip roll in certain conditions? The Ascari is between the two. It has more aerodynamic grip than the Mazda and pushes this a little further forward too. However, is is also quite low and sleek and this is probably why it is popular on the circuits. The "Wedge" is not commonly seen, although is is still legal for Nationals. It's aggressive front end shape means that positioning it on your shell exactly right is vital - too far forward gives a very front endy car, too far backwards gives understeer. Way back I had two of these shells that mounted just 5mm different to each other and the difference in grip was frightening! The Ginetta is not legal, yet, but should get signed off next weekend at the AutoSport show. First testing though indicates its aerodynamic grip is towards the rear, more so than either the Mazda or Ascari. I'll drop you a line when I get some more test results through. Hope this helps, James
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James Garrett - BRCA GT12 Rep
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#5
05-01-2013
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Hi Jason,
Unfortunately I have not seen the Aston shell in the flesh yet. Nor have I had any feedback relating to its performance on the track. However, there might be some clues in the photographs. The front end looks quite tall and blunt (I do think though that the photographic angle might be over-emphasising this quite a bit!), I'm guessing the bonnet will be relatively long, the windscreen will be quite a long way backwards and you do get what looks like the mother of all rear wings... I'm guessing it will be quite a balanced shell, perhaps handling somewhere between the Ascari and Mazda? As soon as I get my mitts on one I will feedback. James
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James Garrett - BRCA GT12 Rep
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#7
16-01-2013
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alot of info on here
http://www.facebook.com/groups/336445139755237/ Ascari, lotus or ginetta? And why????  Like · ·Unfollow postFollow post · Yesterday at 09:14 near Orpington, United Kingdom
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MBModels - Schumacher Racing - Vapextech.co.uk - MRT - Savox - SMD
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#8
16-01-2013
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For me the Aston has totally transformed my car, Barley Mow has started a winter series and we are now 2 weeks into it. The same track will run for 4 weeks with the final on the last week.
On the 6th of Jan I ran the lotus shell and my times were not that bad. (results below Simon 1) 12.33 Best lap and 13.05 Average Lap On the 13th of Jan the only real mod to my car was the replacement of the lotus for the Aston shell. My best time the first week was now higher than my average time for the race the second week. (Results below Simon 2) 11.37 Best Lap and 12.15 Average lap  For me the Aston is very similar to the speed 6.  I would expect to be quicker on the second week but a full 2 laps is not something that i was expecting!
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#9
17-01-2013
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Nice graph Simon how did you do that mate.... Planning on a slight change for this Sunday, never new we where running a winter series till I Left early, couple of weeks I and hope to get my car handling how it was when I packed in. See you Sunday mate.
Paul.
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#10
21-01-2013
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Managed to do some back to back runs between the Ascari, Ginetta and Aston at a local club tonight. Exact lap times/graphs to be added as soon as they have been posted...
Track measured 12x20m and was an intermediate layout (10 apexes, and a 10 sec lap was a good target). Grip usually starts off fairly low but comes up well through the evening. Test results were obtained once a few rounds have been rung and grip was up. Aston gave the fastest single lap of 9.64s. It was extremely aggressive to drive - everything felt as it it was on the nose and as if the rear was just waiting to swing round to overtake the front. Some setup changes (including adding a bigger rear wing) and tire changes were needed to get the best times but getting consistent times was a struggle. If you could keep it tamed it was fun to have all that front end grip but it was bit like trying to drive an angry Pit Bull. Ginetta gave the most consistent times (best single lap of 9.74s, average over 5mins of 9.97s). Car felt safe and easy to drive and forgave several driver input errors. Keeping a rhythmical flow to corners was easy, but the car never felt fast or as "on edge" as the Aston did. However, it was easier to drive and getting tight lines felt less risky. Ascari gave me a best single lap of 9.71 sec. The runs I did with this shell were hampered by a few crashes so the average lap times are not comparable. It felt less predictable to drive than the other two - it would grip, grip, grip... and then all of a sudden let go. Sometimes the front end let go first and it understeered, sometimes the rear let go and stepped out. And then sometimes it would carry on gripping. Odd, I never felt as I knew what to expect the next time I tried the same corner. I still like this shell but feel as if the other two have more to offer? Overall my favourite is the Ginetta. For a one off blast the Aston will probably give a faster single lap but, over a whole race, I feel as if I will have more success with the Ginetta. Hope this helps, James
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James Garrett - BRCA GT12 Rep
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Mardave
ginetta has mega steering. Aston is a very safe shell, carries a lot of corner speed :0
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