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      10-18-2009, 12:14 AM   #1
Jason
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Thumbs up BMW 335i participates in Bathurst 12 hour endurance race

As featured on E90post homepage.

Great writeup and photos on a BMW 335i that race in the Bathurst 12 hour endurance race from the guys at Motordriven: http://motordriven.com.au/?p=188

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There it sits, with its silky smooth lines, its slightly tame yet aggressive stance puts doubts in your mind about its true identity. As you move closer you see the finer details, something only german enginnering can produce. You reach out and grab the door handle, a bond immediately occurs. The door opens in one smooth motion; your eyes are drawn straight to the supple leather door trims perfectly blended in with an elegant wood grain finish. Thousands of thoughts run around your mind, but the only thing your brain tells you to do is to get in. Your body is instantly embraced, completely surrounded by leather.

The suspense starts to build. Your hand moves to the ignition barrel, as if the keys are being drawn to a magnet. A slight twist of the hand and the beast comes to life. Your natural instinct is to select first gear and release the clutch while feeding in a small amount of throttle. You don’t even think, you just do it. Doubt begins to come over you as the exhaust noise is nonexistent. All you can think of doing is to feed in more throttle, to eliminate the doubt. The turbos begin to spool, and all the doubt you had is now gone, you change up the gears and within seconds your at 140km/h. Your overcome with warmth as you ease of the throttle as you whisper to yourself “this is the one!!”

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This is exactly what Gary Holt thought when he first got the pleasure to drive a 335i at his local BMW dealership. Gary wasn’t like every other person who walks into a BMW dealership. Gary was looking at the big picture. He was in search for a car that could conquer the Mecca of Australian motorsport, Mt Panorama, Nonstop for 12 hours.

There is no way a standard car would cope with the abuse of 12 hours of nonstop driving around Bathurst. Gary spent months planning out what components where to be used in the build and what needed to be done to give his team the best chance of conquering the race.

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Upon receiving the keys of his brand new 335i Gary swiftly began pulling it apart and begin the transformation from street car to race car. Once stripped the car was quickly sent to get the body of the car up to spec. With all seams weld and a full FIA approved cromoly roll cage to ensure complete rigidity and to meet the safety requirements of the event. The car was then resprayed in white and was stickered up to match up with Gary Holts Eastern Creek Go Karts colours, which really sets of the car.

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Once the body was sorted out the attention was drawn to the suspension department. The rules for the 12 hour state that all suspension arms must remain factory but springs and shocks could be changed. Gary went straight for the best there is to be found in Australia. Murray Cooate from MCA made up some custom valved Proflex coilovers with remote canisters which should offer the best handling and will happily last the 12 hour race.

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To ensure the suspension could work as planned mutable sets of Team dynamic racing wheels in 17×8 and 17×9 which are commonly used by most teams in the BTCC where rapped in Yokohoma A048 Semi Slicks. Fitting inside those wheels is a pair of Nascar spec 4 spot Brembo brakes up front and 2 spots on the rear using endless brake pads. Not only will these pull up the car from 250km/h each lap but the brake pads should last for the full 12 hours.

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Due to the strict regs that the competitors were forced to abide by the standard engine had to be used, however it was managed by a Motec ECU which allowed for tweaks to the power curve to get the turbos to kick in earlier. The car ended up making around 225kw at the treads. With no changes to the engine to be made the focus was on reliability of the whole drive train to ensure it would last the full race distance. Very large oil coolers where used on the engine, gearbox and diff. With oil temps in check the focus was then shifted to water temps where a large triple bypass aluminium radiator was used with large thermo fans. To ensure the engine wouldn’t be starved from fuel a large fuel tanks was adopted with baffles and along with a surge tank setup. A new filler system was also used to allow for refuelling during the race.

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The interior also received some treatment with an aftermarket steering wheel with a quick release system to make it easier when driver changes come into the equation. All the necessary safety equipment was installed such as race seat, window net and racing harness. The interior is rounded off with a fancy motec dash which constantly monitors all the vital fluids throughout the car.

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All and all the regs set out by the Bathurst 12hr organises ensure that it really is a production based event that is relatively inexpensive to partake in for most manufactures. This should see the number dramatically increase next year and I can’t wait to see what changes Gary will make to the car to make it even better next year.
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      10-18-2009, 12:24 AM   #2
skate_E92
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wow thats intense, alot of work good luck! hope the hpfp does not die...
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      10-18-2009, 12:25 AM   #3
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wow!
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      10-18-2009, 12:36 AM   #4
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i give it 8 hours before the hpfp goes out or it gets too hot and goes into limp mode
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      10-18-2009, 12:36 AM   #5
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wow thats intense, alot of work good luck! hope the hpfp does not die...
LOL
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      10-18-2009, 12:41 AM   #6
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I think they thought about the fuel pump lol... hopefully..

I like the engine bay
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      10-18-2009, 01:14 AM   #7
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crazy
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      10-18-2009, 01:15 AM   #8
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335 with no cupholders lol, IMO thats a +
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      10-18-2009, 01:17 AM   #9
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haha thats cool
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      10-18-2009, 01:59 AM   #10
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Nicesu!
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      10-18-2009, 03:51 AM   #11
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Oh ho ..
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      10-18-2009, 04:40 AM   #12
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A 335i has already won this race before

http://www.themotorreport.com.au/137...athurst-crown/


There may also be a 135i in the race

http://www.ozracingwrap.com/index.ph...eral&Itemid=67
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      10-18-2009, 07:51 AM   #13
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Aren't Turbo Diesels very effective in these sort of races? 335d would require less stops and do almost the same #'s as the 335i.
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      10-18-2009, 10:05 AM   #14
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This news is only 8 months old...........lol.
The 12hr endurance race takes place around February.
They have been racing two 335's in this formula for the last 3 years.
I think in the first year (2007) they finished 1st and 3rd.
This year I think they finished 5th and 10th, surrounded in a sea of EVO X's and IX's.
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      10-18-2009, 10:17 AM   #15
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That's good to see that 335's can race without overheating...or blowing their fuel pumps.

And I'd be interested to see how a 335d would compare. I imagine it wouldn't lose much ground on track, if at all, and should save a lot of time staying out of the pits longer.
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      10-18-2009, 10:31 AM   #16
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Stock airbox? And whats that yellow thing inside the idrive screen area?

edit: just read that the stock engine had to be used. So stock airbox.
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      10-18-2009, 10:56 AM   #17
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It Still Has The Beige Cream In It! Rofl!!!
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      10-18-2009, 11:03 AM   #18
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Quote:
Originally Posted by Prowess Symphony View Post
Stock airbox? And whats that yellow thing inside the idrive screen area?

edit: just read that the stock engine had to be used. So stock airbox.
the yellow thing is the Motec dash piece...its about $1500 for one..almost all of the Porsche Cup cars use one, including ours...
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      10-18-2009, 11:30 AM   #19
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Quote:
Originally Posted by Sparky66 View Post
This news is only 8 months old...........lol.
The 12hr endurance race takes place around February.
They have been racing two 335's in this formula for the last 3 years.
I think in the first year (2007) they finished 1st and 3rd.
This year I think they finished 5th and 10th, surrounded in a sea of EVO X's and IX's.
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      10-18-2009, 12:12 PM   #20
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Can someone explain the suspension setup to me?
I've never seen a suspension with a hose coming out of it...

thanks!
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      10-18-2009, 12:34 PM   #21
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Amazing.
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      10-18-2009, 12:50 PM   #22
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very nice writeup
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