One year after...

It has been one year since my last V8 update. And another busy year it was.

I completed the documentation on the V8.

   
Both folders have proven their value over and over since, especially during testing.
   
On April 7 2012 we did the second Dyno test. Niels again changed the injector wiring as the bike now has 8 instead of 16 injectors.
   
Less complex wiring, and easier to control with the motormanagement. And some weight loss for even better acceleration. ;)
   
Me and Klaus (l) enjoy sniffing V8 exhaust gases. It's unhealthy but hey, most nice things are.
   
Tuning experts Peter and Niels discussed the steps to take.
   
During testing Klaus kept an eye and a tool on still one of the biggest  challenges: heat control.
   
 
   
Still far too rich but a nice result to end the day with: 357 rear wheel horsepower @ 1,08 bar turbo pressure.

Click the picture to enlarge it.

   
The rest of the day we fought with the lambda controllers. Sensors and controllers are this bikes nervous system; any problem with any of them paralyzes the bike and takes the day.
   
June 16 2012: Dyno IV. Again lambda complications took a lot of time – one of them even burned out – as did other defect wiring. Bad luck, but that's R&D.
   
Tuning always start with a rich mixture: it won't get you the best results but it'll increase the chance that the engine will survive this torture.
Although Peter has some huge fans in his high tech testing facility, for a short while the V8 produced more rich gases than the blowers could abduct.
   
Autotuning from idle to ... yes.

Okay, some sound too, to get a picture:

   
Again there was Trouble in Lambda Paradise: faulty firmware this time.

We replaced the defective boost valve ('PWM') by a new Pierburg N75. As you've read above elektronics is a complex matter, not only for us but apparently even for manufacturer Pierburg, as we read in their manual. A challenge: find out the error in one of the three pink rectangles.

   
 
   
Chris made the new cooler and suggested a new, slightly bigger fan. He measured the air displacement of the 'old' one (900 cubic meter per hour) and compared it with the new one (1289 cubic meter per hour). That is 43% more.

That should do. And if it doesn't: it still should.

 

   
 

Last months that Peter, Klaus and Otto visited seventyfive year old bike legend Fritz Egli in Switzerland. We discussed Egli's attempt in 2014 to break his own sidecar landspeed record at Bonneville. And discussed the possibility to take my V8 along with it for the same reason. Nice dream, that's for sure, but priority is getting the bike street legal.

To be continued...


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