Chip

iTrader: (3)

Just wondered about a total ballpark formula for equating combe times to ring times to see roughly what a car driven hard on one could do on the other. (so by definition includes great knowledge of both tracks by the driver)

6.35 seems to be about right for a few cars I tried.

Can people confirm or deny if that works for them?

So

1:21 @ combe
= 81 seconds

* 6.35

= 514 seconds
= 8:34 @ ring

Which sounds about right for say an M3 on decent tyres or a 300bhp Evo


Tried it for quite a few others and it seems to be roughly right all the time.


How does it work for you?

Roosie

iTrader: (8)

coombe 1:22 in a stock Saxo vtr (stock hatch regs)

sorry just thought you asked for times around coombe

Drunken Master

What an odd idea!?

Depends on how well the driver knows both tracks and loads of other stuff....

Did you use the same calculations on your shanty roof?

Chip

iTrader: (3)

As I mentioned in my original post, it assumes the driver knows the tracks well.

I cant find an example of a car that I know of for which it doesnt work well as a ballpark figure.

I have a project in mind that I would like to see a particular ring time from, so having a target time at my local track that puts me in the right ballpark would be a good indicator of when its ready to go over there or not.

Tango Ford

as above odd question ,you cannot compare those 2 tracks ,they are completely different i have not driven Combe ,have done 8 ring laps

Chip

iTrader: (3)

I have driven hundreds of laps of combe and dozens of laps of the ring, they both have straights and corners, some fast and some slow, they really arent so different that a car would be very fast around one and not the other.

So perfectly reasonable to view a time round one as being an approx indicator of a time around the other, im not expecting it to work out to the second, but like I said, the number I gave seems to work well on all the examples im aware of, so just wanted some more data to see how far it does or doesnt extend beyond just the times of me and my mates etc.

Si B

iTrader: (59)

I like and agree with the theory at least

Your first example with the 1:21 and 8.34 lap of the Ring sound like my times, if not someone else has the same times as me in my 340 bhp Evo.

New Evo - think we did an 8:04 and 1:19 Combe, or 1:17 if one of the gents timing was right. So that's 484 and 77.

So 6.28 is the magic number for my new Evo.

What target time do you have for the new project? If it's proper fast I'm guesing you need a 1.16 capable Combe car then?

Chip

iTrader: (3)

No mate, not fast at all, more like a target of 1:35 at combe in fact according to the numbers, its only a bit of fun and not a nutty project or anything!

only 1% out on your new evo then, which is pretty close really I reckon, so seems to work well for that too.

jammerrs

i think they should be mutiplied to get a better reading, 6.3 times your combe time is your ring time.

then its proportional

Chip

iTrader: (3)

They are multiplied, did you not read the post?

Steven_RW

I personally think it would be tough to compare. My M3 was not particularly quick round croft, however, it seemed rather rapid on the ring. THe ring is good for cars that have some proper legs for speed above 100mph. I don't know coombe but it would need to have some rather fast bits to be of equal comparison.

Cheers

RW

Chip

iTrader: (3)

It does mate.



Folly you take at about 130mph in a fast car, and thats only half way along the main straight.

Spiky

iTrader: (1)

i lap combe at 1:21-1:22 but i not sure my car could lap the ring in 8:34?

well not with me driving..lol

Jasesapphy

iTrader: (1)

1.21 about right around combe for a nippyish car, we pull Folly at just over 100mph, and we were about 3mph slower than SiBs evo on the straigh, he did 133mph at combe day, we only punched a 130 down the straight.
But that seems very quick in a 22yr old Maestro PMSL

Roosie

iTrader: (8)

im glad my saxo 1.6 vtr is up with the pace of yours big boys cars lol

Spiky

iTrader: (1)

My speedo only shows 120-125 before breaking into quarry on the wet lol. Though can't see it being much faster in the dry.

Roosie

iTrader: (8)

even tho that corner is flat out dont try overtake on outside like what happened to a fellow stock hatch racer this year!
http://www.youtube.com/watch?v=MTmIEYA8z7I

Chip

iTrader: (3)

Thats the sort of times cars like yours DO do at the ring though mate.

But obviously in the hands of someone who knows the track well, knowledge of the ring is important in lap times, hence I said at the beginning it would need to be driven as hard in each case.

Spiky

iTrader: (1)

Need more laps at the ring then lol, or a passenger that can shout. Go go go or

BRAAAAAAAAAAAAKE lol

Chip

iTrader: (3)

Jonboy did 8 fifty-something in his old nova on his first trip out there, and that was only 150bhp and a relatively basic spec suspension wise too, I really dont see why you wouldnt take 20 seconds out of his time with a bit of practice.

Spiky

iTrader: (1)

Next time I go there will be a weekday so nice and quiet, was stupid busy last time

Chip

iTrader: (3)

Good plan, Goes without saying that on both tracks if you go on a mega busy day it will cost you time.