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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Tracking, Autocrossing, Dragstrip, Driving Techniques > RRT/getBMWparts.com Koni Challenge ST 328i Build Thread



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      03-04-2009, 03:11 AM   #23
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nice work so far!
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      03-08-2009, 11:29 AM   #24
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the cage is pretty much finished. Seat bracket has been made and bolted down. Next is the roof going back and getting painted then we'll finish up the wiring and paint the interior.

We've decided to run the required Koni's on the car for grand am races and for the NASA CCA racing we'll use a set of AST's with vorshlag camber plates.

We've got a customer/friend that has been running the same setup for about a year now and absolutley loves it. He used the car for one lap for america last year and also DD's it.
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      03-08-2009, 03:44 PM   #25
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how come the cages are never symmetrical?
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      03-08-2009, 05:41 PM   #26
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Quote:
Originally Posted by just4kickz View Post
how come the cages are never symmetrical?
It's all about driver protection because you don't have a passenger in the car when you're racing.
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      03-08-2009, 07:55 PM   #27
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Quote:
Originally Posted by AW325xi View Post
It's all about driver protection because you don't have a passenger in the car when you're racing.
oh. nice to know.
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      03-08-2009, 08:41 PM   #28
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awesome build up! thanks for sharing it with us!
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      03-09-2009, 08:33 PM   #29
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Those pictures of the cage are also somewhat early in the build stage as well.

The finished product runs all the way up to the front footwell and up the A pillar's along with some more work at the back seat and x's at the front doors.


I left my camera sitting in the garage today or else i'd be updating you all with pretty much a finished cage.

We ended up ordering an OEM 535i oil cooler that is front mounted and has a very large surface area. One reason we chose this was due to the large surface area that requires less ducting to get the cooling needed as grand am will penalize for too much of this sometimes.
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      03-15-2009, 05:02 PM   #30
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Painted the whole inside yesterday. Once it has cured fully only things left to do are install the oil cooler, suspension and run the wiring







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      03-15-2009, 05:14 PM   #31
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just a quick question...how does stripping out the car like this affect weight distributrion?
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      03-16-2009, 10:18 PM   #32
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i was also wondering if you guys were going to change the alignment so that it becomes more evenly distributed when the driver sits inside the car?
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      03-22-2009, 10:01 PM   #33
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Once we have taken our weights for the car track ready it will give us a better idea of where we are at and what adjustments need to be made as far as weight distribution goes.

We spent yesterday sorting out a traction control and drive by wire issue the car was having. For some reason the gas pedal wasnt giving us any kind of response. Re loomed the wires for it separately and got that working. We will only run traction control in the wet if need be which is a first along with ABS.

We also installed the Koni's finally and will spend this coming weekend doing testing and deciding what needs to be adjusted.

Here are a few pictures. The OEM steering wheel is in just for the moment we have a Sparco wheel and quick release hub that will be used once the car is finished.

To make things clean we cut up the OEM dash to fit over and around the cage and made side plates. If our carbon fiber guy ever gets around to it we'll have him make us a CF dash panel







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      03-23-2009, 02:44 PM   #34
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Nice build!

Are you using the oil cooler preemptively or do you know that the car has some oil temperature issues?
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      03-26-2009, 10:10 PM   #35
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      03-29-2009, 10:41 PM   #36
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We were working on the car till about 1am wednesday night to get it ready for VIR this weekend. Pretty much shakedown, we need to adjust the brake bias to get things more stable but besides that it did well.

Made 218whp on dynojet with correction

Here are two quick pictures, this is before we get our livery on it.


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      03-30-2009, 12:30 AM   #37
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what engine mods have been added?
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      03-30-2009, 10:33 AM   #38
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Nothing at all. Only thing we are allowed is a Bosch ecu that apparently doesn't do much.

Retaining the stock headers with a custom
Exhaust is all we've done.
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      04-25-2009, 06:04 PM   #39
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we ended up cutting the cats out of the headers to make a custom setup for that. Speaking with a few different people we decided against going with supersprint headers as they arent really good for much power over the stock header on this car. We have yet to put in the 335 oil filter housing with fittings for an oil cooler instead of making something. Though it is one of the top priorities.

We will be heading to Jersey next weekend for our first koni race. Vinyl is on brakes are ready and so are we.

I'll get some pictures from todays nasa races at summit and two weekends ago at a CCA event at VIR up later on
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      04-25-2009, 06:57 PM   #40
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nice numbers for essentially a stock motor!

do you think oil temperature will be an issue with the car or are you guys being proactive
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      04-27-2009, 01:26 PM   #41
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Quote:
Originally Posted by bayerischeperformance View Post
we ended up cutting the cats out of the headers to make a custom setup for that. Speaking with a few different people we decided against going with supersprint headers as they arent really good for much power over the stock header on this car. We have yet to put in the 335 oil filter housing with fittings for an oil cooler instead of making something. Though it is one of the top priorities.

We will be heading to Jersey next weekend for our first koni race. Vinyl is on brakes are ready and so are we.

I'll get some pictures from todays nasa races at summit and two weekends ago at a CCA event at VIR up later on
I've got a 2009 e90 328i, so it was pretty cool to see one turned into a race car.

What lap times did it run at summit?
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      04-27-2009, 09:01 PM   #42
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Quote:
Originally Posted by Nick Nazareno View Post
nice numbers for essentially a stock motor!

do you think oil temperature will be an issue with the car or are you guys being proactive
oil temps were looking a little high during testing on a 45 degree night at summit so the oil cooler will be put in to see what we can bring them down to.

Quote:
Originally Posted by bmwbadboy View Post
I've got a 2009 e90 328i, so it was pretty cool to see one turned into a race car.

What lap times did it run at summit?
One of the guys drove our shops e36 and ended up winning class and overall and the other drove a customer car and turned some decent lap times.


we didnt take it out this weekend. Felt comfortable with everything so off to Jersey next weekend for the first race!!!








the e90post guys never seemed to have an interest in the car so e90fanatics



and there was also a ferrari challenge car playing around all weekend


We've also got a few different cars running in One Lap for America two of which were out for testing with us this past weekend




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      04-27-2009, 09:10 PM   #43
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Quote:
Originally Posted by bayerischeperformance View Post
oil temps were looking a little high during testing on a 45 degree night at summit so the oil cooler will be put in to see what we can bring them down to.
was timing getting pulled? sorry for the detailed questions, it is REALLY hard for me to find tech on E90 328 that is used at the track....
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      04-27-2009, 09:12 PM   #44
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I'd be going to Jersey to watch but got to make a run to Va Tech on Sunday.
I was just curious to see how the e90 would do compared to my spec e30. Good Luck next weekend.
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