DTR's Turbo'd M52 E30 track/street Demonstrator

[Mike The Bavarian]

great example of good welding and fabrication skills. liking the tig welds.

[Blip Bavarian]

Dang! amazing work. I browsed through the entire thread, and didnt see any wheel and tire specs. What is your set up. Im curious to see how much meat you can fit under those fenders and quarters.

[DonkeySlide]

That is a really cool build, and that dp is HUGE!

[purebmw]

Question: are you still using motronic 402/403 non vanos 1992 ECU? wich way do you go?, i build the same here, and need hardware and software to tune it, i was thinking in W.A.R. lite chip, but dont know if it is the best choice.

regards from guatemala, nice setup!

[xLegendOZWest]

this thing is FILTHY!!!!! (in a good way) really interesting BOV (i assume thats what it is on the intake mani). what wheels are those? and do you run mid ohio alot? being so close to home id love to go see that beast in action.

[DTRguy]

You sir... are a God...
sooo when are you coming to australia to do this to my e30?

Thanks! Um love to... but I think my family would have issue with that ;)

[revhead888]

You sir... are a God...
sooo when are you coming to australia to do this to my e30?

[DTRguy]

Sweet. Looks like a handful.

Have you guys thought about a rear wing or any other aero?

Thank you and yes it is! I have not only thought about it I am trying to make it happen! This car WILL be seeing speeds in excess of 175mph. I am working out where the rear wing will be sourced from. The front will have a lip extension and dive planes on the sides to redirect air over/around the front of the tires while creating some level of downforce.

awesome.. i'm sure you guys will kick ass, esp with anthony at the wheel :)

Thanks I appreciate it... and Yeah Anthony is a amazing wheel man!

[kishg]

awesome.. i'm sure you guys will kick ass, esp with anthony at the wheel :)

[yberther]

Sweet. Looks like a handful.

Have you guys thought about a rear wing or any other aero?

[DTRguy]

Some incar video of the worst suspension setup we tried that weekend

http://www.vimeo.com/7301007

[DTRguy]

Its no problem, just asking why the setup was the way it was. And was the car tuned for the new exhaust of which it made the same power? Not trying to question your knowledge by any means to each there own.

No not retuned... It was on the dyno for that exact reason... but A/F's didn't change, nor did the power, or torque. In fact you could have overlaid the plots and you wouldn't be able to tell one from the other.

Look how long and smooth the transition is:

[Under_Pressure]

Its no problem, just asking why the setup was the way it was. And was the car tuned for the new exhaust of which it made the same power? Not trying to question your knowledge by any means to each there own.

[DTRguy]

Again, I appreciate your input... I have a lot of engineering clients and friends. They believe in my ability to design and build a car that makes power. I can tell you this for instance: My previous owned car (one of the 15 or so turbo cars I have personally custom built) had a 3" dp and a 2.5" exhaust. I dyno'd it at 320whp... Redid the exhaust to a high flow 3"... re dyno'd it... it made 320whp. Meaning, in that instance that the exhaust was flowing more than it needed to even at 2.5". Again I say the most important for power is at the dp and having the biggest you can logically fit will be best. Period. My classroom is my shop. And I have learned quite a bit in here ;)

reason for improving power on your jetta example is simply because your increasing the area for the exhaust to expand causing a lower pressure area where the flow of exhaust will increase. Giving you will see a gain in that setup it would show more alot more If the dia would stay the same. If you look at fluid dynamics you would know when gases flow tru a smaller dia pipe to a greater area it causes the gases to cool down by cooling down gases your slowing down the atoms making it more dense. After that then you have his cooled down air going tru a smaller area of volume. This causes the gases to heat up thus increasing it's velocity. All of this causes "my theory" on why this setup is not prime.

I'm a student in mechanical engineering and have actually studied and built setups that prove this as being true. If you need help with the small to large explanation it's how your a/c works..

[Under_Pressure]

Really... Hmmm how can you quantify that when most of the exhaust velocity happens in the first few feet? It helps turbo spool and overall flow through expansion. However, you don't have to believe me. Someday I will possibly have a 4" exhaust... so at least I am already prepped for it. And lastly I have 4" dp because I can. The Best exhaust on a turbo is basically NO exhaust. So the biggest you can fit the better. Different case on a NA car altogether. Ever ask yourself why upgrade 3" dp on VW 1.8t's even with stock exhaust run stronger? That potentially disproves your theory. But you are entitled to your opinions and theories as am I. this is probably my 15th custom built turbo system. But thanks for your input I appreciate it :)

reason for improving power on your jetta example is simply because your increasing the area for the exhaust to expand causing a lower pressure area where the flow of exhaust will increase. Giving you will see a gain in that setup it would show more alot more If the dia would stay the same. If you look at fluid dynamics you would know when gases flow tru a smaller dia pipe to a greater area it causes the gases to cool down by cooling down gases your slowing down the atoms making it more dense. After that then you have his cooled down air going tru a smaller area of volume. This causes the gases to heat up thus increasing it's velocity. All of this causes "my theory" on why this setup is not prime.

I'm a student in mechanical engineering and have actually studied and built setups that prove this as being true. If you need help with the small to large explanation it's how your a/c works..