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My 240Z with supercharged BMW engine

240z bmw bmw engine m50b25 bc-racing coilovers

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#41 1969honda

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Posted 23 January 2016 - 10:49 AM

Awesome! Watch out once the boost bug bites you'll always want a little more.

#42 TeemuM

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Posted 24 January 2016 - 10:19 PM

Awesome! Watch out once the boost bug bites you'll always want a little more.

Lets hope that won´t happen. :)

 

First plywood mockup of that SC bracket. 

Feel free to comment if you find some faults with this. This is my first supercharger build so all help would be appreciated.

 

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#43 TeemuM

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Posted 26 January 2016 - 09:38 PM

Well that didn´t work...There is no room for boost pipes. Only way compressor can be rotated is when boost pipe is directly up, and then it hits to hood.

I think I need to relocate alternator so I can mount that charger lower.

 

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Edited by TeemuM, 26 January 2016 - 09:48 PM.


#44 TeemuM

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Posted 02 February 2016 - 11:48 PM

Here is final design of these brackets. These are going to be laser cutted from 10mm steel.

 

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Also ordered larger pulley to lower boost litte bit. However there seems to be some problems. That new pulley hits to that flange that is in front face of charger. In rotrex techinal drawing that flange height is 5mm and I have 8mm. So maybe this charger is older design, etc. However I think I need to machine 3mm off that flange to get enogh clearance.

 

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#45 TeemuM

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Posted 15 February 2016 - 11:03 AM

Now that engine work is done I had time to modify fuel tank. I wanted to use in-tank fuel pump, so needed to cut hole and weld that plate in place. Also made that bracket for Walbro 450 E85 fuel pump.

 

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That fuel pump bracket is going to be zink plated and inside of tank is going to be covered with Por15 fuel tank sealer.



#46 TeemuM

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Posted 18 March 2016 - 10:24 PM

Fuel tank is now ready to be assembled. I did Por15 tank sealer treatment inside so hopefully it wont rust anymore. Pump is Walbro 450 E85 and I am using AEM high flow fuel filter.

 

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#47 ehren

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Posted 19 March 2016 - 03:32 PM

amazing work! love it



#48 TeemuM

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Posted 15 April 2016 - 09:54 PM

I drove about 200km with NA engine and then it was time for oil change and installing supercharger. Still lots of small thing to be done but at least it is now drivable.

 

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Small video of first start with Rotrex.

 

http://teemum.kuvat...._kaynnistys.mp4

 



#49 Sirpent

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Posted 16 April 2016 - 05:53 AM

Very cool build and congratulations on the start up  ^_^


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#50 1969honda

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Posted 16 April 2016 - 08:17 AM

That's sweet, motor really torques to one side under load, gotta be a blast to run around in.

#51 TeemuM

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Posted 17 April 2016 - 08:19 AM

Thanks!  :)

I quess my calculations were off because this only boosts about 0.5bar. I calculated that with this pulley boost pressure would be about 1 bar. Because pressure is so moderate there is not so big difference compared to NA engine. Well I can always change smaller pulley... ;)



#52 TeemuM

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Posted 28 April 2016 - 06:38 AM

Went to dyno yesterday. There was 360hp/420nm and that was only with 0.4bar. I am quite happy with results as boost pressure was so low. So there is much improvement available with smaller charger pulley. Also that 2.5" exhaust is too small so I need to do it again.

 

Small video.

https://www.instagra...aken-by=teemume


Edited by TeemuM, 28 April 2016 - 06:39 AM.


#53 TeemuM

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Posted 23 May 2016 - 03:35 AM

I made small modification to exhaust pipe. Previously I had chambered single outlet muffler and I changed it to twin tip straight-through muffler. Like looks and sound with this one!

 

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#54 TeemuM

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Posted 25 October 2016 - 11:17 PM

I ended driving season this week. Drove little bit over 5000km in this summer and not a single problem. Attended few drag racing events and best time was 12.99@178kmh. Those were at airfield so traction was not so good. 

 

For next summer there is not going to be much changes. Little bit more boost, better intercooler and larger exhaust. For outside I bought original mirror to replace that plastic one and Euro-style front spoiler.

 

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Few driving videos.

http://teemum.kuvat....a/kiihdytys.mp4

http://teemum.kuvat....sta/Elokuva.mp4


Edited by TeemuM, 25 October 2016 - 11:21 PM.


#55 TeemuM

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Posted 19 December 2016 - 11:15 AM

I got this aluminium radiator to replace original. I also put Spal electric fan so original fan shroud would not fit. I modeled new shroud, machined mold and used carbon fiber to made new one. Still needs few layers of clear coat and it´s ready!

 

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#56 rturbo 930

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Posted 19 December 2016 - 01:10 PM

That's some very nice work!


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#57 DomiNATE

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Posted 21 December 2016 - 10:30 AM

Great job looks awesome.  Just found you on Instagram.  


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#58 TeemuM

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Posted 21 December 2016 - 10:46 PM

Thanks guys!

DomiNATE: I update that IG litte bit more often than here.



#59 TeemuM

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Posted 31 December 2016 - 11:53 AM

I fabricated new exhaust that replaces current 2.5". Its now 3" with two Dynamax mufflers.

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Also mounted larger intercooler and oil cooler for Rotrex. IC is treadstone and oil cooler is Setrab.

 

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#60 TeemuM

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Posted 18 February 2017 - 10:45 AM

Finally found time to finish fan shroud so radiator is ready to be installed. I cured that part in sauna. It made quite a bit difference to part stiffness. After that is was clear coated.

 

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I modified Nismo-style front spoiler. Now it fits quite well and atleast in my opinion it looks better. Now I need to make mold from it and manufacture new part. 

 

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