It had to happen.....

[shimmy]

Hi,

7.36 in a standard [engine] CSL ? at the
Ring- BTG ?

Loaded CSL with SuperCharger is 7.22 BTG.

BMW PR department missed an oppurtunity there
then !!!!

Regards,

The Gorilla.

loaded lap is full lap like official 7m 52s lap,

[Curly]

Just chatting to AndrewM, prev owner of Duncs CsL and he said the best lap with trace in his CSL was 7m36s BTG.

Pity there was no vid of the lap

[shimmy]

Pity there was no vid of the lap

Gaute prob has some of the same sort of times.

am I right in saying BTG times you are not up to speed at the Bridge start point like on full lap, so it would be wrong to deduct exact time GTB from full lap?

[AlexGTT]

Gaute prob has some of the same sort of times.

am I right in saying BTG times you are not up to speed at the Bridge start point like on full lap, so it would be wrong to deduct exact time GTB from full lap?

Correct Shim.

[The Gorilla]

Hi,

Still not following this ?

Nordschleife is 20.8 km as used
for the RCN events.

For Tourists BTG its 19.1 KM.

Quote-

''On a tourist lap it's impossible to complete a whole lap without stopping to queue for the gates at 'C'. So the BTG method is to time your laps in a point-to-point style from the bridge to the gantry. On a trackday this is also useful, as you don't have to complete 3 whole laps (63km) to get one lap time. To recap: after exiting the carpark at 'C' on the map above, drive under the Bridge (Antoniusbuche) at 'B'. From here it's 19.1km to the Gantry (currently carrying Audi sponsorship) at point 'A'. Easy!''


Full 'Northloop'' Lap is I believe 22.8km.

So at 7.36, the std CSL time quoted BTG, its equall to around
38.5 secs a km on the 'shorter lap'. [19.1km] BTG.

The Loaded CSL Lap which was 7.22 over the
full Northloop, 22.8km is approx 31.5 secs a KM.

So the standard CSL quoted, in being 7 secs a KM slower
than the Loaded CSL on these numbers, is
approx 8.45 secs for the full Northloop lap 22.8km] which
is about 50 secs slower than the Official
time.

Is that what is being said here ?

Regards,

The Gorilla.

[Curly]

Gaute prob has some of the same sort of times.

am I right in saying BTG times you are not up to speed at the Bridge start point like on full lap, so it would be wrong to deduct exact time GTB from full lap?

I might be wrong shim but the great gaute best vid lap was in the low 7.50's btg but his driftbox times was faster

[northernjim]

Correct Shim.

On a tourist day, 90mph is about the max at the bridge, whereas Trackday should see you at 155-160mph

But you will need to 'reduce speed' :gayfight: for the left right section of Tiergarten and by the hohenrain chicane you'll be doing the same speed

So the advantage is 70 mph reducing to 0 over 500m using my manlogic ....less than10secs?

[7.77]

to increase your lap time record in the nurb, you have to pratice there. there is a real difference between 0 and 50 laps (no brake needed), and 50 /100 laps, 100/200 and after 200 laps.

In fact, when you feel the necessity to have big brakes, when you litteraly push strong on the brake pedal, then you're around 8.00.

8.15 is easy, with little risk with a csl. i've done 8.19 warming the csl and the tyres during about 1/3 of the lap

after, you have to work

i was there on the 15th of august but with my 320d, miss csl had her period and unable to drive, during a private event, with the straight line open. a friend with his 997 gt3 (not rs) was there. his time was 7.42, he is not really good driver, still learning how to drive, but he has done 200+ laps there.

another guy was there with a stock 350z, just stripped (approx 1200 kgs), he has done about 40 laps.........his lap record this day was 7.43 :bigcry:

he doesn't really know the track, but this guy was a world endurance bike champion about 10 years ago. so he knows how to drive on a track

i'have videos of the 350z and the gt3 if required

[The Gorilla]

Hi,

''Some interesting facts about BTG:
The distance between the gantry and the bridge is almost exactly 1 mile, 1660mtrs.
It takes a top-end sportscar less than 25 seconds to cover this distance. Most normal cars with a 120mph top speed over 30 seconds.
A BTG lap is more than just 25 or 30 seconds slower, as the standing start from point 'C' adds another 5-6 seconds on most cars.
The straight is very bumpy, and is uphill all the way to the bridge.
Top speed is attained into the dip AFTER the bridge on a flying lap
On a BTG lap top speed is attained before Schwedenkreuz or in the Foxhole (for lower power cars)

This is from the Bridge to Gantry Website;.


Does make you wonder how some
people arrive at their lap times, given
the variables.

I always thought there was 1609 mtrs to the mile
so the extra 50mtrs seems to make no difference
either.

Regards,

The Gorilla.

[7.77]

so, a btg lap for a stock csl should be less than 7.30 (7.25 infact)

[shimmy]

so, a btg lap for a stock csl should be less than 7.30 (7.25 infact)

So let's call BTG official time as 7m25secs as opposed to 7m52s for full lap.

Of Andrew did a 7m36 that is very quick, of he had a Perf Box:bigcry:

[_Nathan_]

7:36 wasn't a standard car though? It was Duncans car?

[alexk]

So let's call BTG official time as 7m25secs as opposed to 7m52s for full lap.

Of Andrew did a 7m36 that is very quick, of he had a Perf Box:bigcry:

Full lap is 7.50

[shimmy]

7:36 wasn't a standard car though? It was Duncans car?

Agree........ Bit lighter and Intrax.

Full lap is 7.50

Sorry, yes, get mixed up with slower GT3.

[DuncanR]

On a tourist day, 90mph is about the max at the bridge, whereas Trackday should see you at 155-160mph

But you will need to 'reduce speed' :gayfight: for the left right section of Tiergarten and by the hohenrain chicane you'll be doing the same speed

So the advantage is 70 mph reducing to 0 over 500m using my manlogic ....less than10secs?

You mean like we didnt on that lap I was driving Jim !! :hahaha:.

Andrew has genuinely always said that he regularly got a 7:40 BTG out of the Broom, and Steve Gill would probably back that up as he used to drive with him a bit , didnt you Steve ?? Steve??. A few weeks ago down at the Ring DN day, I took Andrew out in the Broom for old times sake and asked him about the 7:40 lap, he admitted that to achieve it, was .. "a bit scary", which sort of tells me that The Broom, even with its mods, (engine stock) is probably at its limit at about that time. The reason that Andy took the decision to cage his/my car, was self preservation, he could see himself getting faster, (he was doing quite a few laps a year) and took the very sensible decision to fit a cage. I for one think his claim of a 7:40 BTG is genuine.