R35 Faster Than Group A R32 Gtr!

[Munro]

Willall Racing just ran a 1 min 12.19 at Mallala today in their JDM R35 GTR.

Faster than the group A R32 GTR!

Congratulations Keir & Martin. You guys are flying now.

E85 looks like the way to go, when are you going to fit the bigger turbos?

Wish I was there................. oh well. I will keep working.

[handbrake]

awesome work guys, well done

[Roy]

What tyres was it running? Thats a great time...does it make time everywhere or is there a section of track that it really suits?

[LSX-438]

that sounds insane

[Duncan]

congrats, its great that a modified 35 gtr has caught up with a 21 year old R32

[Swiper the Fox]

congrats, its great that a relatively standard 35 gtr tweaked by a few cluey guys in the city of churches has outdone a 21 year old R32 with extensive race history funded by a rich tobacco company with part factory backing run by one of the best in the business

[fungoolie]

Thats amazing guys! Congrats.

[Martin Donnon]

Today was one of those fruitful testing sessions where the track is 'in the slot' versus other times recently when we have been there where the drifters have convered the corners is dirt, or the supertrucks had laid diesel everywhere. No excuses today, it was a good solid fast track condition day and with plenty of time we were able to run some good data on the car and start to dial in the suspension and wing settings. Best part though is that after a couple of months working on our EVO programme I was able to get back in the chair of the GTR and have a feel of the setup....I was fortunate enough to have the opportunity of 'de-greening' the slicks in the morning session, which is kind of like trying to drive a 9 second drag car on ice.

The biggest problem the GTR faces in its current guise is that it is traction limited. Believe it or not, even with a set of new Michelin medium compound slicks on board and properly bedded in controlling wheelspin through the esses and out of turns three and five is a real problem, and one that can panic the four wheel drive electronics if not managed correctly. You really need to feed the throttle to stop the fronts and rears lighting up and pushing the car into a big sideways moment. I found this out early on in the piece when the tyres were still green. The pure raw straighline speed of the car is unnerving as it builds speed so quickly, and is stretching well into fifth gear at the braking points, as is keeping the throttle into it through the kink and the long left hander out of the nothern hairpin. Its a difficult balancing act, and one I wasnt prepared to push the limits of after the break, so 14s over the three laps I did was acceptable. The whole time you need to keep the thought that this is a 700hp+ road car chassis in the back of your head and drive accordingly. It would be interesting to take one of the 'these cars drive themselves' crew for a passenger lap for the sport of it one day. My only suggestion would be to bring an adult diaper or be prepared to pay a cleaning fee

'Power down' engine management settings (TPS controlled boost mapping) for corner exit speed and then adjusting the relationship between bump/rebound and tyre pressure for the varying track temperatures over the day gave us the pace increase, no magic here, just a methodical work structure of test and tune. Sensibly on fresh tyres there is no reason why we shouldnt be able to record consistent 1:10 laps in this car. That might sound a little far fetched now, but 6 months ago the idea of a 1:12 in a road car would have been bordering on unbelievable, particularly as this is a stock engine, stock turbo, stock transmission car. Some well thought out modifications, a set of slick tyres and ongoing testing and development are the keys to this cars pace

We have some way to go still to beat the Winfield cars by the looks of it, Skaife had it on pole there in 1991 with a 1.09 or similar. One must always have targets! However we are only 3 tenths of the outright Carerra Cup lap record to put the whole thing in perspective

Edited February 12, 2010 by Martin Donnon

[handbrake]

Martin, how is the brake cooling upgrade going?

[fungoolie]

+1 on the brake water spray progress..

And not to cast aspersions on you and Keir's driving skills Martin, but you have to remember it was "Thee Mark Skaife" driving that R32. We need to compare apples with apples here. What additional time would him or some other professional driver well on his game be able to extract out of your R35?

Edited February 13, 2010 by fungoolie

[Martin Donnon]

Interestingly enough the brake cooling system raised its head in anger when I had overlooked part of my job. Essentially I didnt mark off the bottle was filled between sessions, and sure enough there was enough water surge away from the pickup of the pump to ensure that before the low level warning was on (there was still over a litre in the tank) that the car was off an into the dirt with the brake pedal on the floor. At this pace we have four laps of full stint running before we have to refill the stock washer bottle, or risk boiling the brake fluid. To give you an idea of the temperature difference we now have a cooling system in the pits for the front brakes and the frontal cooling system of the car, when it came in with no water left in the tank the left hand side front pads caught alight, and thats after two cool down laps!

Sure enough though we have done some math on the car today and have worked around what I believe is some sensible SA engineering thats still roadable to get this car comfortably into the 1:10 zone at the track

[Doctor Sodways]

Here are some shots of the GTR during its Massacre of lap times...

Early on with a certain Mr. Donnon at the wheel

With the new Record Holder

Edited February 13, 2010 by Doctor Sodways

[BoyWhoCriedWolf]

Nice. Lulz at the 32 comments. As an ADM 32 owner I concur.

[Martin Donnon]

[LSX-438]

Martin

what are you max lateral g's now, vs say prior ro the slicks and/or wing? Might be handy to put a scale on the right hand of the chart

Edited February 14, 2010 by LSX-438

[Tangles]

give me a drive, 3rd lap I promise you a 1.09

or at least die trying !!

nice work, great read.

currently home-prepping my rb26 track car ready for its 1st rundown on 12/4/01 at the sau:sa track day

[fatz]

awsome times for a street car

but there is a massive diffrence to 40 laps at that pace and a one off

either way r35 gtrs are crazy fast

im glad there is price limit for production racing

[fungoolie]

Martin

what are you max lateral g's now, vs say prior ro the slicks and/or wing? Might be handy to put a scale on the right hand of the chart

Or even post your G force polar plot please.

[Martin Donnon]

I didnt get around to a full G-plot today (forgot actually!)

What I can tell you though Fungoolie is that in the Esses we are seeing around 1.35-1.4 lateral G loading,

and the big one -1.2G at 202km/h on the face of the kink. Thats why it feels a little scary

[fungoolie]

I didnt get around to a full G-plot today (forgot actually!)

What I can tell you though Fungoolie is that in the Esses we are seeing around 1.35-1.4 lateral G loading,

and the big one -1.2G at 202km/h on the face of the kink. Thats why it feels a little scary

Cogs of steel guys! 1.2G in the kink? Glad you had slicks on!