After 3 years of no trackdays in the Marcos, we are venturing out to Cadwell tomorrow to blow away a few cobwebs! Looking forward to see how the car goes with it`s new wider track setup and LSD.
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dparslow |
CADWELL PARK TUESDAY 8TH SEPTEMBER 2009 |
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After 3 years of no trackdays in the Marcos, we are venturing out to Cadwell tomorrow to blow away a few cobwebs! Looking forward to see how the car goes with it`s new wider track setup and LSD.
It`s not more power you need, it`s less weight and a few subtle mods and some not so subtle!
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OldNoccer |
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Blimey - first post in this section for 2 and half years !!
You will remember we chatted about ARBs at Prescott, as I was making new links for mine. I have acquired a Marcos Owners Club magazine from about 1988 with information on fitting ARBs and how to use the Pilbeam equations to calculate roll resistance. I suppose you have already sussed all this out. Those old magazines were packed full of technical info. I'll post a thread on the magazine in 'general' when the summer event frenzy has died down. Not having attended a track day, I would be interested to hear how strict they are on noise, clothing, roll cage, belts, etc. I suspect things get progressively tighter, and have wondered if a coupe without a roll cage/bar would even be allowed to play.
There's a lot of talk these days about green transport. Well, I am ahead of the game, I already have green transport ... British racing green.
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cactusdave |
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I did a trackday at Bedford Autodrome 2 years ago in my V6. The only requirements were a noise limit and Helmet! Hope to do more now I have a more powerful
engine. Went with my son to Abingdon airfield in his Westfield this year. Same requirement - Helmet and 100db limit.
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OldNoccer |
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100dB at trackside, or close up ? Mine is over that close up, but I scraped through at Curborough where it was 105dB. I assumed they would be fussy about lack
of roll over protection.
There's a lot of talk these days about green transport. Well, I am ahead of the game, I already have green transport ... British racing green.
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dparslow |
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At Cadwell the static noise test is 105dcb`s at 3/4 max revs, the noise tester was very understanding of the older cars and I achieved 102dcb at 2/3 revs.
Clothing requirements are no exposed arms or legs and a helmet is compulsory, many regulars prefere to wear a fire protective suit for trackdays. Your car has
to be in good order and safe to drive, roll over protection is not compulsory as many people turn up in standard cars.
It was a really good afternoon/evening the weather was excellent, sunny and dry for the duration. When I arrived there was still some practice sessions and racing going on from the Tour Britannia Series so for about an hour it was a petrolheads heaven. It`s not very often you see such a cross section of classics on the same grid, from a Hillman Imp to a De Tomaso! Cars ranged from a good field of various 911`s, Elans, Alpine Renault, Mustang, MGB, Cobra, Escort`s and many more. The De Tomaso narrowly won the race, with a 911 and Elan very close behind, power is not such a big advantage at Cadwell as the 911 and Elan looked as if they were stood still on the straights, but made up lost ground through the twisty bits. Track time started at 4pm and there was a good attendance of various cars, Elise/Exige, Caterham R`s, BMW 3 series, Metro`s, Nova turbo, Porsche`s, $%!`s and many more and a solitary red Marcos! Well the car ran really well, after a few laps and a bit of fine tuning of tyre pressures, damper and ARB settings I could push on progressively and get a feel to the "new" car. It does feel quite different to how I remember it felt three years ago when I was doing trackdays more frequently. What`s new? Well it has 4" wider track now, higher spring rates, the ARB`s have a greater range of adjustment and it has a LSD. I have an infa-red laser thermometer which I use to measure the temperatures across the full width of the tyres when I`m setting it up, it`s the only way to check whether or not the full width of the tyre is working for you. Eventually after a few laps and pressure adjustments the tyres are running pretty close temps across the full width except the fronts where the temps are a little higher on the inner edges. Initial impressions, there is a touch too much understeer, the rear end feels like it`s glued to the tarmac and the LSD has cured all the tight corner wheel spinning. Not a bad start, but it`s all relative to how it was before, it is now quicker it`s just handling a little differently to what I was used to. I quite liked the fact I used to be able to provoke progressive oversteer and could steer it with the throttle to a certain extent, the down side to this was you are wasting power and forward motion! The back end is now firmly planted and has a reluctance to budge that much before the twitching effect of the LSD starts to become noticeable, one of the disadvantages of a plate type LSD over a torque biasing one. At the end of the day it had been a lot of fun and it was good to get out in the car again after 3 years of occaionally working on it and not driving it! While I was there I also met another local Marcos owner who has a Mantara, a LM400 and 2 Mini Marcos, hopefully he will come along to the local meeting.
It`s not more power you need, it`s less weight and a few subtle mods and some not so subtle!
Last Edited By: dparslow Wed, 9-Sep-2009 16:40.
Edited 1 time.
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OldNoccer |
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That sound like fun - and btw a Pantera is on my desirable list. A nice cheap practical car (compared to some of the others on my list !).
Do they time you on track days, or do you have to do that yourself if you are trying to set a car up ?
There's a lot of talk these days about green transport. Well, I am ahead of the game, I already have green transport ... British racing green.
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