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      02-29-2020, 06:55 AM   #67
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Not into racing and therefore don’t care for the wing. Having said that I enjoyed reading the thread and appreciate all the hard work you put into the car which came out great.
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      02-29-2020, 07:28 AM   #68
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Amazing car, great job dood!
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      02-29-2020, 07:32 AM   #69
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Quote:
Originally Posted by J-RO View Post
Not into racing and therefore don’t care for the wing. Having said that I enjoyed reading the thread and appreciate all the hard work you put into the car which came out great.
Function > form
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      02-29-2020, 10:05 AM   #70
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interested to know why you didn't just throw in a jb4 for the extra power? definitely the easiest and most reliable way to get that extra power and keep the downpipes.
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      02-29-2020, 11:58 AM   #71
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What at amazing build
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      02-29-2020, 12:05 PM   #72
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this is awesome!
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      02-29-2020, 12:32 PM   #73
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Great read and nothing wrong with aero for a car that is going to live at the track.

Disappointing to see how wonky the power mods treated you after all that, but at least the car is smart enough to go into limp mode instead of shooting a rod out the bottom.
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      02-29-2020, 01:14 PM   #74
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Awesome build, thanks for sharing!
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      02-29-2020, 02:30 PM   #75
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Great thread 👍
Can't wait for more updates
Keep up the good work and keep down the track times 😎
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      02-29-2020, 08:54 PM   #76
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great build!
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      03-01-2020, 08:21 AM   #77
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Entertaining thread! Nice read! 😎👍
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      03-01-2020, 10:19 AM   #78
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Great job!!!

Very well done
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      03-01-2020, 03:59 PM   #79
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which wheel dollies are those? (the purple one in post 32)

love this build!
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      03-01-2020, 06:21 PM   #80
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Enjoyed reading this and viewing the photos way more than I could ever have had it been another stupid ass YouTube feature.

Thank you sir for keepin it OG to the car forum world.
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      03-01-2020, 08:58 PM   #81
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What front lip is that?
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      03-02-2020, 01:38 AM   #82
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      03-02-2020, 08:08 AM   #83
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Love the mood in those photos. That aluminum chassis wing mount is wild. Thanks for sharing your build!
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      03-02-2020, 01:04 PM   #84
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Quote:
Originally Posted by mindcontrollerone View Post
Awesome write up!!! Look forward to the times you set this weekend!
Thank you, I was able to best a 1:54 lap, a bit off pace from the original 1:52 to laid down the first outing. Second lap, the car still threw a drivetrain malfunction on stock tune, so that is something we will have to get to the bottom of.

Quote:
Originally Posted by Lienrocs View Post
I'm assuming thats a 295 square set up on the A052's. I may have missed it but what are the wheel specs? Sick build!
Correct. 295/30/18 A052 on a 18x10.5 +20 wheel. Fair warning, the 295 A052s run very wide! Could very well be comparable to a 305/315 in other tire models.

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Originally Posted by Bumpinjeep View Post
Such a dope project. Looks super fun. Please add more pics and stories soon.
Just got back from the track weekend. Will do. Plenty more to come!

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Originally Posted by TacoChris View Post
Great build and thread!
Quote:
Originally Posted by J-RO View Post
Not into racing and therefore don’t care for the wing. Having said that I enjoyed reading the thread and appreciate all the hard work you put into the car which came out great.
I figured the Voltex wing will be a love or hate sort of deal, I personally love it for what it does, but thank you the kind words are appreciated.

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Originally Posted by Refined View Post
Amazing car, great job dood!
Thanks!

Quote:
Originally Posted by ThugzZ BunnY View Post
interested to know why you didn't just throw in a jb4 for the extra power? definitely the easiest and most reliable way to get that extra power and keep the downpipes.
I wanted to eliminate as many variables contributing to the problem as possible. I will tune and add power later down the road, but I first want to sort out the limp mode/cooling issues and maximize the platform to its full potential on stock power.

Quote:
Originally Posted by Cyberdemon View Post
Great read and nothing wrong with aero for a car that is going to live at the track.

Disappointing to see how wonky the power mods treated you after all that, but at least the car is smart enough to go into limp mode instead of shooting a rod out the bottom.
Agreed, and you couldn't be more right. It's a blessing and a curse. Frustrating for competition days and bettering lap times, but better than shooting a rod or completely toasting the motor.

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Originally Posted by BPMSport View Post
Awesome build, thanks for sharing!
Thank you, much much more to come.

Quote:
Originally Posted by vladberca View Post
Great thread 👍
Can't wait for more updates
Keep up the good work and keep down the track times 😎
Workin' on it!

Quote:
Originally Posted by TrevorM3 View Post
which wheel dollies are those? (the purple one in post 32)

love this build!
They are called GoJaks! Great investment!

Quote:
Originally Posted by Igor_M5 View Post
Enjoyed reading this and viewing the photos way more than I could ever have had it been another stupid ass YouTube feature.

Thank you sir for keepin it OG to the car forum world.
Absolutely and thank you. To get the best of both worlds, I did document this as a youtube docuseries that I will update for those who are more interested in watching video as well.

Quote:
Originally Posted by rli2bcz View Post
What front lip is that?
Status Gruppe, with custom chassis mounted splitter.

Quote:
Originally Posted by Brasko View Post
Love the mood in those photos. That aluminum chassis wing mount is wild. Thanks for sharing your build!
Appreciate it!
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      03-02-2020, 07:02 PM   #85
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thanks for the reply! gonna get a set
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      03-02-2020, 07:34 PM   #86
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Bimmer Challenge Round 2: Buttonwillow Raceway Park CW13

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With the tune and downpipes removed, I thought our drivetrain malfunction/limp mode issues were a part of history. Especially after the test and tune day at Streets of Willow Springs where the car was ran hard and ran flawlessly, the drivetrain malfunction bug bites once again. The first lap out I was able to lay a 1:54 lap (quite a bit of pace off of my initial 1:52 lap), however it was a decent time to go out and get a feel for the tires and the new alignment. The car was gridded P7 out of the session of 30 or so and I had set out to claim a faster lap. I ran a 70% pace warm up lap to get temps up to speed, and set a near perfect exit out of the first corner and jammed down the front straight away. We had great top speed leading into turn one and by turn 4-5 the predictive lap time showed a low 1:51 on the AIM solo lap timer. I had just surpassed the halfway mark of the lap, exited riverside with good mid and exit speed, and ran full throttle into Phil Hill. Under heavy braking, and trailing right about to crest the apex, the DRIVETRAIN MALFUNCTION STRIKES AGAIN/ Cutting all boost, limiting the car to 4,000rpm and unloading the car quite violently which I was luckily able to save and keep the car on track. I limped it off and let as many people by as possible with my limited speed (I apologize to any other drivers that may have gotten held up by this), and pulled directly into the pits. I key cycled the car, no hard codes were stored, and once I fired it up, the drivetrain malfunction is gone. I checked the coolant levels and they were fine, and let the car cool before the next session. We had one more session to make it count for the competition. 3rd session came after lunch with a bit more ambient temp as well as drastically higher track temps. According the GPS data the car was seeing about 6mph less top speed at the front straight with the same corner exit speed leading up to it and 100% throttle. This meant power/timing was being pulled once again. This leads me to believe the issue lies in heat, intake air temperatures to be specific. Keep in mind this is my best hypothesis as it makes sense for the ECU to engage its failsafes and pull timing especially once it sees higher temps being a forced induction engine. One quick idea that can alleviate under hood IATs as well as increase front downforce (believe it or not), would be to add hood ventilation. The battle now is to cut and add an aesthetically pleasing hood vent as that is very important to me (lol).



To my surprise, I have not personally seen many F80/F82 chassis being pushed to extreme limits, which can also contribute to the lesser seen issues that I may be experiencing. That being said. I will be partnering with a good buddy and track going veteran Amir Bentatou, of RS Future. We will be doing a test and tune day, and logging all data through OBD2 to get all readings from GPS, throttle position, brake position, g force, coolant temps, oil temps, IAT temps etc. We will review the data and see exactly at what temp and in what sections this issue is happening it and will narrow it down to gain solid track and data proven results to share with other track going S55 cars/drivers. The 1:54 lap placed us 4th, edged out of podium by a few tenths in (a very competitive where the fastest times were within 1-2 seconds from 1st-4th) Bimmer Challenge, which is where I did not want to be, but hey once again, the car lived, and although frustrating, we will get to the bottom of this and figure out the recipe for a properly working S55 driven under heavy track conditions.


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Unfortunately a buddy had a tensioner pulley failure, so I had to pay it forward to a fellow S2K owner (S2K owner myself), and towed him home.


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      03-02-2020, 11:57 PM   #87
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Even in "extreme" conditions it seems odd you are having issues when many others who have tracked their cars have not. Also taking into account BMW runs this engine basically stock (albeit in a different tune) in its GT4 car. That car does run the CS/GTS hood though which does have some venting.

Interested to see what you comes of the next testing session.
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      03-03-2020, 02:53 AM   #88
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Quote:
Originally Posted by Pic18 View Post
Even in "extreme" conditions it seems odd you are having issues when many others who have tracked their cars have not. Also taking into account BMW runs this engine basically stock (albeit in a different tune) in its GT4 car. That car does run the CS/GTS hood though which does have some venting.

Interested to see what you comes of the next testing session.
I was thinking same thing. M3/4 cars are engineered for hard track use. And good cooling has always been strong point. Lots of cars out there running good and clean with tunes too. Why not flash GTS tune , Euro spec MDM and E-diff? Look forward to hearing what you figure out. Great thread.
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