Oulton Park Aftermath - The Rebuild Begins

Oulton Park Aftermath - The Rebuild Begins

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anonymous-user

53 months

Saturday 4th October 2014
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ED02TVR said:
TVRM's - Your right I should have had tuition and was planning on but then I had opportunity to take my pal round in the passenger seat which leads to showing off and then disaster. The one handed thing was only because the first 2-3 laps I was driving slow to warm the car up after the dinner break, so I didn't push it until that BM popped out of the pits.

I do think tuition would have advised a much wider line into that corner but ha I'm not Schumacher and never will be I was just out for some fun.

I know I sure gave my passenger a 'buzz' his heart rate reached 180 over 130 or something... when we were in the medical centre. lol
Good luck with the re-build and you will enjoy the tuition I'm sure.

I return to racing next year after a three year break. I've done some track work in between, but not very much at all.

I will be doing the tuition thing before my return - to hone my average and ageing skills to at least what they were when I last raced - which was at Oulton. I eneded up on the grass on the other side of the bend at which you spun during the race - not just to prove there is more than one line through a corner either smile

m4tti

5,426 posts

154 months

Sunday 5th October 2014
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This is the tuscan mentioned by NTEL earlier. It's got a decent size splitter but how big a rear wing you would need is anyone's guess. What you need is a university student doing an aero dynamics thesis with access to a wind tunnel.


Speed 3

4,486 posts

118 months

Sunday 5th October 2014
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Speed 3 said:
At that speed and topography, aerodynamics is a key factor. Slippery shape of Mk1 Tuscan with no aerodynamic disturbance means fast in a straight line on the flat but otherwise it is always going to lead to a challenge. Sag is ugly for a reason - stability. That cheesy glass shower shelf on the back is not a spoiler, its there to disturb smooth flowing air that produces lift. Compare shape of Tuscan racer and road car and it'll be obvious.

I wouldn't take my Tuscan on a race track bar having some professional help on how to mitigate the inevitable sub-optimal behaviour.
Just to correct myself...

Technically speaking the Sag's rear appendage is actually a spoiler, the problem is most people incorrectly call inverted aerofoil sections on the back end of cars spoilers when they aren't at all. On an aircraft spoilers are flat panels deployed on landing to dump lift. They do of course produce drag which limits straight line speed (hence DRS in F1).

Back to the original point re Tuscan, remember what happened with early TT's.....

Right - time to get me coat nerd

Edited by Speed 3 on Sunday 5th October 10:07

MPoxon

5,329 posts

172 months

Sunday 5th October 2014
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Sorry to see that. I can't really see what you did wrong there. Good luck with the rebuild.

m4tti

5,426 posts

154 months

Sunday 5th October 2014
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Speed 3 said:
Just to correct myself...

Technically speaking the Sag's rear appendage is actually a spoiler, the problem is most people incorrectly call inverted aerofoil sections on the back end of cars spoilers when they aren't at all. On an aircraft spoilers are flat panels deployed on landing to dump lift. They do of course produce drag which limits straight line speed (hence DRS in F1).

Back to the original point re Tuscan, remember what happened with early TT's.....

Right - time to get me coat nerd

Edited by Speed 3 on Sunday 5th October 10:07
Good point. The original Smooth reared TT did do some not so good things at high speed. We have a 225 and the rear wing is very subtle.

ILoveMondeo

9,614 posts

225 months

Sunday 5th October 2014
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ED02TVR said:


Next time shes moving she will look like this. Maybe one months work is a little optimistic...
Wow, big thumbs up from me! The purists wont like it but I think that'll look fantastic. Can you buy a front splitter like that or are you going to get one made?

I had a small splitter on my last tuscan and it definitively made a difference in front end left when approaching 100mph.

I'll likely get one fitted to my current car in the new year.


spitfire4v8

3,990 posts

180 months

Saturday 11th October 2014
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m4tti said:
This is the tuscan mentioned by NTEL earlier. It's got a decent size splitter but how big a rear wing you would need is anyone's guess. What you need is a university student doing an aero dynamics thesis with access to a wind tunnel.

You don't even need that, just put a known wing in clear air and you will generate a lot of downforce.


m4tti

5,426 posts

154 months

Saturday 11th October 2014
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How was the most effective wing height determined? There also seems to be quite a difference between the two cars pictured in terms of ride height. The tuscan appears very low in comparison at the front.

jcpgasoline

278 posts

213 months

Tuesday 14th October 2014
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ED02TVR said:
It does look like I hit the grass or rumble strip but I'm convinced I wasn't anywhere near it. In fact I know I didn't, it just went light and I was still foot flat down accelerating. I have a history of road going hill crest accidents from my youth. I went on a skid car course once and the instructor pointed out that what I was lacking in ability I made up for in balls.

I am now determined to make this Tuscan a worthy track day car.

I personally, however maybe wrong having never completed circuit racing, think it needs a lot more down force... from the side it looks beautiful but it isn't exactly formula one shaped if anything the front probably gives up-force if thats even a word? It starts to feel light anyway at high speeds. I managed to reach around 145 on my speedo past the pits the following right hander sometimes became a little twitchy especially with hot brake fluid...

There weren't many cars that where a lot faster, except the time attack boys in the 700hp 4x4s. It was on par with any road going cars (except the GTR's but they rewrote the rule book) even the M3's were very closely matched (depending on level of balls at the time), and most kit cars where similar. The best on corners where the little kits with the lemans styling I don't know what they're called but they pissed all over me in the twisty bits. Not much there could match the acceleration and speed on straights.

Slicks will be used on the next outing along with the best grade brake fluid I can get.

It is a thrilling car to take on the track it gives so much more driving feedback than anything with ABS and Traction Control unfortunately until my driving skills are developed further I probably need both! Having individual wheels locking up for brief random moments under braking take a bit of getting used to. There is definitely no need to give her any more power.

I'm going to copy the circuit racing idea, low front splitter to stop that air getting underneath at speed (especially been as I can now justify modifying the front end..), a big spoiler (any advice on making these practical and setting the up would be appriciated), stiffen up the suspension further and add the Max Caster on the front. Then go again.

I have a feeling I'm going to be good at fibre glass repairs by the time I have the recipe right. One thing is for sure track day's in these will never get boring.
The Mk1 S aero-package works (large front splitter + rear spoiler). One can really feel the car squat down over 100mph, with downforce over both axles. Suggest you google "Tuscan S downforce" to learn more.

The other thing to adjust is geometry. I found dialling in more rear camber and rear toe-in really helped settle the car, too.

FRONT
toe-in per wheel NIL
toe-in total NIL
camber -1.5 degrees

REAR
toe-in per wheel -12 minutes
toe-in total -24 min.
camber -2.5 degrees

Walford

2,259 posts

165 months

Thursday 16th October 2014
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Is there a link to the video