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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > BPC N52 E90 Turbo Track Car



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      05-17-2017, 11:35 AM   #1
John@BPC
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BPC N52 E90 Turbo Track Car

Ok guys in this thread we will be sharing the continued development of our N52 race turbo kit.

The goal over the next 6 weeks is to finish the track prep for our E90. Once the car is track ready we will begin our durability testing at the 505hp level we are currently at. Dan will be driving with in car video. He has 6 years of experience at our home track VIR (Virginia International Raceway). Most of which has been with the BPC S62 swapped E30. We are all excited to see how our Turbo E90 holds under race conditions. We are hopeful it will make us proud and hold together for its intended use. Once we have completed a couple track events with good results we will be removing the hot side to send to get bid out to duplicate for resale. After we are able to come up with a price and time frame for production we will start a group buy for members. Please enjoy the journey with us and please keep your questions/comments professional and on topic.

Wen have a few albums with all of the pictures taken from the old thread, organized in one place for your viewing pleasure.

https://www.facebook.com/media/set/?...1&l=ac0abf4554





Engine:














Interior start:










Midway Interior:




Removing sound deadening:




Beginning the cage:










Sunroof delete:


Finished cage:















Last edited by John@BPC; 07-10-2017 at 11:36 AM.
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      05-17-2017, 12:31 PM   #2
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What are you planning on for the suspension? Or has this already been covered elsewhere?
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Originally Posted by TheAxiom
FYI - I don't drive hard at all. So I'm not interested in more clamping force when I won't use it. Even on my car, I take it easy. It's just too loud to be enjoyable.
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      05-17-2017, 02:59 PM   #3
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Curious about what you are planning on using for brakes as well.

Car looks really fast in the videos.
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      05-17-2017, 04:50 PM   #4
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Quote:
Originally Posted by SpartaEvolution View Post
Curious about what you are planning on using for brakes as well.

Car looks really fast in the videos.
The car will be getting MCS suspension, and Performance Friction brakes. Once they arrive we will be posting pictures of the install.
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      05-17-2017, 05:10 PM   #5
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Quote:
Originally Posted by John@BPC View Post
The car will be getting MCS suspension, and Performance Friction brakes. Once they arrive we will be posting pictures of the install.
Fantastic! Really looking forward to the rest of the build.

Any plans for competitive racing or just some track and endurance testing for the moment?
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      05-17-2017, 09:47 PM   #6
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You guys ever figure out the maf Less tuning with the brake and gas?
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      05-19-2017, 01:40 AM   #7
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thats so dope!
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      05-22-2017, 02:04 AM   #8
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love this.
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      05-30-2017, 10:10 AM   #9
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Suspension and Brakes

Suspension and brakes have arrived.




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      05-31-2017, 07:13 PM   #10
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Some serious kit there!

Nice choices
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      07-28-2017, 10:48 AM   #11
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More Aero and Cooling

We are now adding a rear mount radiator with its own separate water pump, along with an quite aggressive rear diffuser.








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      07-31-2017, 06:09 AM   #12
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you need a fat spoiler to keep the downforce. like the koehnegszeeeggggg...

so.... how many ponies does a trunk mounted radiator require?
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      07-31-2017, 07:10 AM   #13
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The rear mounted radiator is interesting.

How does the air flow? Thru the open windows->cabin->fans->radiator->out rear diffuser?
Pusher fans on top of the radiator?
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      08-01-2017, 11:58 AM   #14
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Quote:
Originally Posted by CobraMarty View Post
The rear mounted radiator is interesting.

How does the air flow? Thru the open windows->cabin->fans->radiator->out rear diffuser?
Pusher fans on top of the radiator?
The pusher fans on top will supply the majority of the air flow to the rear mount radiator and the hot air will exit through the diffuser.
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      08-01-2017, 09:40 PM   #15
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Love all this aero!

Hard piping just easier and more supportive than soft ducting for the rear rad?

Great build.
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      11-20-2017, 03:21 PM   #16
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Whats the news?
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Originally Posted by TheAxiom
FYI - I don't drive hard at all. So I'm not interested in more clamping force when I won't use it. Even on my car, I take it easy. It's just too loud to be enjoyable.
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      11-21-2017, 10:49 AM   #17
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Quote:
Originally Posted by John@BPC View Post
We are now adding a rear mount radiator with its own separate water pump, along with an quite aggressive rear diffuser.
How are you guys running a separate water pump?
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      11-24-2017, 11:56 AM   #18
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Quote:
Originally Posted by sirdaft1 View Post
How are you guys running a separate water pump?
I can tell you how to run it separately without ECU being involved.
The water pump has 4 pins. The pin 3 is not used because is for test only. Pins 1 and 4 are for power supply and pin 2 is for PWM.
Here is the pin out:
Pin 1 is battery voltage
Pin 2 is PWM signal
Pin 3 is a test/BSD signal
Pin 4 is Ground
Supplying +12v to Pin 1 and pin 2 will make the pump run full speed after about 5sec delay (wake up time)
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      11-28-2017, 01:40 PM   #19
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Quote:
Originally Posted by John@BPC View Post
Quote:
Originally Posted by CobraMarty View Post
The rear mounted radiator is interesting.

How does the air flow? Thru the open windows->cabin->fans->radiator->out rear diffuser?
Pusher fans on top of the radiator?
The pusher fans on top will supply the majority of the air flow to the rear mount radiator and the hot air will exit through the diffuser.
Pardon my ignorance... I thought the whole idea of a rear diffuser was to create a low pressure area for better aerodynamics. Wouldn't it be better to take air from the diffuser area and push it up through the top?
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      08-20-2018, 12:03 AM   #20
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any update?
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      08-31-2018, 03:29 PM   #21
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any update?
Did it make it around the track?
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      11-04-2018, 07:04 PM   #22
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Where did all the photos go?
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