Went To Willow Bank Drags 30-7-2011

[darrinspencer]

Took my stagea out to SAUqld club day at Willowbank Dragway yesterday

Last year in October with 30+deg arvo best run was 13.5 at 101mph, until the clutch went which stopped day after 6-7 runs

Yesterday, dry arvo at 22-25deg did 11 runs total with an extra 20hp top end and 45hp thru midrange on new tune at 17psi

348rwhp or 258rwkw. New rear tyres and brand new 4200lb clutch with carbonic centre.

Struggled this time with traction. Spun the rears all the way thru first gear bouncing off the rev limiter @ 7200rpm

Launches were 4500rpm, slipping the clutch to get it off the line without bogging down

First run was 13.8, 2nd 13.4 and then most around 13.1, 13.2 at 105mph

Gave the car a rest for 15 mins to cool out and did 3 more runs.

The best for day was 13.020 @ 106.95mph. Did another 13.039 @ 105.97

60ft 1.98

Overall pretty happy with it. Sooooo close to my target of a mid to high 12 sec family wagon

1st and 2nd gear gearbox noises now thuo

Plenty of professional pics of the day on this site

Check out the rear squat on the launches. Photo 327

http://www.dragphotos.com.au/p106689424/h14e15fd6#h14e15fd6

Attached is a bad video my 10y/o son took on DSLR

Annoying thing is a stock 2009 GTR ran consistant 11.6 all arvo!!

Edited July 31, 2011 by darrinspencer

[KiwiRS4T]

Not bad at all. I imagine the stock GTR is somewhat lighter than your wagon.

[66yostagea]

Nice runs.

If you get any prints of the day I can frame them up for you. That also goes for for any SAU members who want any framing done.

[dirtyRS4]

on ya darrin.

[Daleo]

Certainly not too shabby for a wagon!

Some nice pics of you car on the link; took a few, must've liked it.

[Jetwreck]

Nice times.........just short of 12's.......remove the passengers seat and you'll crack it!!!

[GTR260]

what was ur 60ft time?

[ironpaw]

1.98 as stated in the op

[darrinspencer]

Thanks for the comments

Main issue was traction off the line

I had new tyres fitted last weekend 245/35/19's

I did not drop tyre pressures, left them how they came from the tyre shop. maybe 38-40psi

They don't have much wall height, so I don't if it make too much different?

Also I have manual rear end, so factory LSD.

Apparently I was getting more left hand rear wheel spin. not both. Not sure?

Maybe a 1.5 lsd would be better?

[southern_tango]

Really like your pic Darrin looks like your stag is going to leap forward...excellent.

[KiwiRS4T]

Thanks for the comments

Main issue was traction off the line

I had new tyres fitted last weekend 245/35/19's

I did not drop tyre pressures, left them how they came from the tyre shop. maybe 38-40psi

They don't have much wall height, so I don't if it make too much different?

Also I have manual rear end, so factory LSD.

Apparently I was getting more left hand rear wheel spin. not both. Not sure?

Maybe a 1.5 lsd would be better?

If you have the viscous lsd any mechanical lsd would ne an improvement.

[Raysboostin]

how come ur not running AWD??

[darrinspencer]

how come ur not running AWD??

I am

I was

I think

[Tangles]

cheapest trial would be to fit an adustable torque split control unit (gtr tsc http://www.ebay.com.au/itm/GTR-Torque-Split-Controller-TSC-GTS4-GTS-4-RB26-Stagea-/110722890211?pt=AU_Car_Parts_Accessories&hash=item19c79939e3) and put more bias towards the front wheel drive ? might decrease the rear end drive loss you are experiencing?

other tha that, change back to auto

[jet_r31]

Nice work,you'll get there.... these things are bloody heavy for 260rwkw and only 105mph traps, I was hoping 300rwkw ish would be good

for 115ish mph traps.

cheers

darern

[wolverine]

I am

I was

I think

I would be expecting lots more grip if the front end was hooking up. The only time I can get bucket loads of wheelspin is when in 2WD.

If the front end isn't hooking up you have an easy 12 in the car when you sort it out.

[darrinspencer]

I would be expecting lots more grip if the front end was hooking up. The only time I can get bucket loads of wheelspin is when in 2WD.

If the front end isn't hooking up you have an easy 12 in the car when you sort it out.

Well, compared to the others (rwd) cars there and even the R1 bike that ran 10.9, I killed them off the line

I had the bike for approx 1/4 to a 1/3 third of the track and then he would fly past.

It could have been high tyre pressure plus low ride height with too much neg camber causing poor traction.

I will look into it further.