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Member

Registered: 5th Jul 00
Location: Aberdeen City
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26th May 11 at 05:10

Some data logs from VBOX.

Time Attack round 2. Bo Neilsens best lap in the final vs my best lap in the final.

Bo seems to take McIntyres much quicker than I do, and has a small advantage at the top end. 114VMAX to my 110VMAX

Seems i'm quicker on the throttle and through higher speed corners whilst Bo is better at lower speed stuff and pulls past me when I'm into 5th Gear

Ben J

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Registered: 31st Jan 05
Location: Cheshire
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26th May 11 at 06:44

Interesting stuff.

I was keeping an eye on yours and Bo's times during the day via Bo's FB page.

Both cars are very similar BHP wise aren't they?

Obv you've got 4WD as an advantage but I guess your car is heavier?

[Edited on 26-05-2011 by Ben J]

Rob B

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Registered: 8th Jan 04
Location: Area Motorsport Drives: Race EP3
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26th May 11 at 08:35

Do you have any brake traces at all or any other inputs to look at? Can't really tell to much with that!

Member

Registered: 5th Jul 00
Location: Aberdeen City
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26th May 11 at 11:17

brake = when the traces go down

Its just GPS data... so I can give brake G force etc

chris_uk

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Registered: 8th Jul 03
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26th May 11 at 11:32

who is who, i cant see it too well on my phone.

is bo the green one?

Member

Registered: 5th Jul 00
Location: Aberdeen City
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26th May 11 at 15:14

bo is red, i'm blue/green

Rob B

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Registered: 8th Jan 04
Location: Area Motorsport Drives: Race EP3
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26th May 11 at 15:27

looks like you could do with carrying more speed through the corner to me, especially the last bend.

Bo looks to hot into a fair few corners and slow out aswell! tut tut.

Member

Registered: 5th Jul 00
Location: Aberdeen City
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26th May 11 at 15:52

eh?

I'm faster in and out of most of the corners.... the hairpin (last corner) is a slow 35'ish mph corner.... Me being a bit slower prob alows me to get on more power earlier compared to bo's feather throttle.

Butchers - between 15-20secs into the lap - I have a slow speed there as I was bouncing off the limiter in 3rd

McIntyres - between 10-15secs in - Bo gets round there quicker than I do.... I hate the corner!

Rob B

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Registered: 8th Jan 04
Location: Area Motorsport Drives: Race EP3
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26th May 11 at 16:04

Bo from what im seeing is on the throttle earlier on both traces. You need to weigh up the time difference from braking zone to end of straight to see who's gained the most, traces can be decieving.

What i mean is, your traces are more of a V i.e stop the car, point and go rather than carrying the speed through the corner.

Post up a brake and throttle overlay

I'm used to looking at shiz like this, you'd gain masses of time by wiring in a proper data logging system!

Member

Registered: 5th Jul 00
Location: Aberdeen City
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26th May 11 at 16:34

a point V trace is much better.... you dont want to spend time off the gas or brake to be honest!

My trace (on the speed v distance plot) shows me (on some corners) accelerating earlier, i.e the trace picks up further to the left (less distance so earlier)

You plot is useless without ans scales!

Rob B

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Registered: 8th Jan 04
Location: Area Motorsport Drives: Race EP3
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26th May 11 at 16:50

It has scales just not shown there

SetH

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Registered: 15th Jul 01
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26th May 11 at 18:33

Ive gone off time attack and binned my sunstrip

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Registered: 5th Jul 00
Location: Aberdeen City
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27th May 11 at 05:56

emicen

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Registered: 26th Jul 10
Location: Glasgow
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27th May 11 at 07:47

The Astra, new shape Impreza and Leon were the only cars getting a good turn in to MacIntyres.

Every other TA car was scrubbing badly with understeer. (Which some cured with big licks of throttle to force in to oversteer and a touch of rallycross

)

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Registered: 5th Jul 00
Location: Aberdeen City
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27th May 11 at 19:25

hehe

sandyvxr

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Registered: 19th May 11
Location: sheffield
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28th May 11 at 11:21

an people say fwd cars dont handle...lol

Member

Registered: 5th Jul 00
Location: Aberdeen City
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29th May 11 at 10:14

.... er.....

Bo has greater power to weight (faster on the straights) but my lap time is a 59 to his 60.

Impreza can still doing something right

Bo's car does handle very well though, esp on turn in to slow speed corners. I have an idea or two on how to improve my turn in but it would prob unsettle my car on the higher speed corners where I'm quicker.

I had the diff settings giving a slight diff lock/more torque to the front which gives the car more of a 4x4 grip, but gives a fair amount of 'push' - understeer on the front. The stability is good on corner exits/mid corner on power though. I shifted the DCCD as the tyres werent as grippy in the cold and at times damp conditions

In short the car turns in a hell of a lot better with the DCCD at open.

emicen

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Registered: 26th Jul 10
Location: Glasgow
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29th May 11 at 16:08

quote:
Originally posted by AK
.... er.....

Bo has greater power to weight (faster on the straights) but my lap time is a 59 to his 60.

Impreza can still doing something right

Bo's car does handle very well though, esp on turn in to slow speed corners. I have an idea or two on how to improve my turn in but it would prob unsettle my car on the higher speed corners where I'm quicker.

I had the diff settings giving a slight diff lock/more torque to the front which gives the car more of a 4x4 grip, but gives a fair amount of 'push' - understeer on the front. The stability is good on corner exits/mid corner on power though. I shifted the DCCD as the tyres werent as grippy in the cold and at times damp conditions In short the car turns in a hell of a lot better with the DCCD at open.

Those three all run flat undertrays on the front with splitters and chassis mountings so downforce is transferred rather than relying on the bumper mounts.

There seems to be a massive focus from everyone on fitting as big a rear wing as possible and tiddly little canards on the front to try and balance it up.

I reckon the Astra and Leon would have had too much rear grip for a slow speed circuit like KH and would have benefitted from losing a bit there so the rear end would move around more in to the proportionately faster corners like Clarks and Duffus.

Not really sure what would work well with the 4WD cars, but the new shape Impreza certainly had the least noticeable tyre scream through the corners from understeer and didnt look to be scrubbing wide.

Member

Registered: 5th Jul 00
Location: Aberdeen City
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29th May 11 at 16:30

Yup - those 3 have full flat floor with 'ground effects' skirts

My splitter extends to about the rear of my front wheels - so rear of engine.

Ojc

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Registered: 14th Nov 00
Location: Reading: Drives : Clio 197
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29th May 11 at 16:40

VXR FTW

Anyone who says they don't handle is clueless

Member

Registered: 5th Jul 00
Location: Aberdeen City
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29th May 11 at 17:49

They dont handle

Na - i've never even been in one.... BUT I'd imagine Bo's handles nothing like a stock showroom VXR

Ojc

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Registered: 14th Nov 00
Location: Reading: Drives : Clio 197
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29th May 11 at 18:14

My Astra and Andys handles better than my Mini

emicen

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Registered: 26th Jul 10
Location: Glasgow
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29th May 11 at 20:33

Short of the former Zen impreza I'd be amazed if any are running low enough to really benefit from ground effect skirts.

Johnny Millner's TSS car is ridiculously low to make use of it!

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