Snetterton Lap Virtual Cup Analysis

duncan · Post by **duncan** » Thu Mar 01, 2007 7:43 pm

Having been using the GPS lap timing yesterday to log and analyse my laps it was hard fo focus on work today when I could be switching on geek mode and looking at the following:

For those that havent seen Virtual Cup (http://www.virtualcup.fr) it is a little piece of software that will load onto a PDA or laptop with GPS to measure lap times, speeds etc.... I love it.

analysis of the 1.25 lap speeds showing speeds around the circuit as verified by GPS. It is interesting to note that my speedo was showing nearly 140 on the main straight but gps shows 128 mph.. also shows that I was scrubbing too much speed off into Richies... then damned brakes

G Force - strictly straight line stuff. Shows me I need to brake harder as the brakes are up for it.

A split by split sector time:

A comparison between speeds on the previous best time there and yesterdays' best:

Still loads of room for improvement

sdminus · Post by **sdminus** » Thu Mar 01, 2007 8:54 pm

looks good dunc. i use somthing very similar on my kart to help me out

This shows rpm.

You should get somebody that is quicker to take it round. You can learn from there data..

Scott

RX7 · Post by **RX7** » Thu Mar 01, 2007 8:58 pm

sdminus wrote:You should get somebody that is quicker to take it round. You can learn from there data..
Scott

Dunk, mate.

Its gotta be me !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

duncan · Post by **duncan** » Thu Mar 01, 2007 9:00 pm

thanks Scottt - I did try and do that from Gary's passenger laps in the last session but i couldnt get a gps signal holding it on my lap

sdminus · Post by **sdminus** » Thu Mar 01, 2007 9:03 pm

The best way is to let gary take it for a few laps.... its a big trust thing but its the only way since gary has brakes like dinner plates lol

You will get there im sure.

who has the big power lap record then ??????

Scott

duncan · Post by **duncan** » Fri Mar 02, 2007 11:22 am

Scott - Gary says that he was lapping at 1min 20 according to his logs analysing peak to peak - I went in the car and it was quick with a capital Q :notworthy:

I did try and get the lap timing working in there but couldnt get a GPS signal with it on my lap unfortunately - it would have been good to compare traces to see where I can make up time.

From my initial analysis:

There is probably another 2 or 3 seconds available if I took it to the limit of the car and current suspension. It will be interesting though when the new coilovers go on to see what diff they make and when I get used to the extra braking power available to me.

sdminus · Post by **sdminus** » Fri Mar 02, 2007 4:18 pm

Top work dunc. I dont want to sound cheeky but. You have rasied several differant points about you lap which would suggest to me that a return to the golden rules of lap times.

This may be of help to others as well.

1. perfect the line. I tend to start by late apex'ing all corners until i find the best line for me.

2. Optimise you exit. Ie sorting the comprimise corners out and deciding if 2mph slower in will result in 10 mph faster at the other end.

3. optimise the braking. Use referance points and rev points to trim the braking zones to get repeatable lap times and a accurate plan of attack

I tend to stick to the hard and fast rules and they work for me.

Scott

duncan · Post by **duncan** » Fri Mar 02, 2007 4:26 pm

sdminus wrote:Top work dunc. I dont want to sound cheeky but. You have rasied several differant points about you lap which would suggest to me that a return to the golden rules of lap times.

This may be of help to others as well.

1. perfect the line. I tend to start by late apex'ing all corners until i find the best line for me.

2. Optimise you exit. Ie sorting the comprimise corners out and deciding if 2mph slower in will result in 10 mph faster at the other end.

3. optimise the braking. Use referance points and rev points to trim the braking zones to get repeatable lap times and a accurate plan of attack

I tend to stick to the hard and fast rules and they work for me.

Scott

Good points there Scott :thumb:

It is also worth noting which corners have the biggest impact on the speed of the lap. this is normally the ones with the longest straights afterwards so at Snetterton it is Sears and Russells, not as important to nail Coram in the grand scheme of things but get those two spot on and seconds tumble off the lap time

sdminus · Post by **sdminus** » Fri Mar 02, 2007 4:32 pm

cool.
So if you can get .1 or .2 sec per corner which it looks likely then a plan of attack is forming. I find the referance points the best tool.

Scott

duncan · Post by **duncan** » Fri Mar 02, 2007 4:40 pm

I now have a mixture of wet and dry/drying laps to choose from to compare with for the next time so will see where the time comes from.

That kart software looks the dogs danglies too by the way - would love to have a play in one of those