Old May 23, 2011 | 12:12 PM
  #398 (permalink)  
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Web 3.0
Joined: Aug 2009
Posts: 259
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From: Houston, TX
Default Re: Project Crossfire - a Rotrex Supercharged Limited!

Well, everything seems to be going smooth at the moment. I've driven the car to work for the past 2-3 weeks while tweaking the fuel Map. I reconnected the O2 sensor taps to the AEM and disabled O2 correction so that I could get the base maps perfect.

I am almost there for all closed loop areas. Next up, I'll re-enable O2 correction and start playing with the voltages to get the AFR I want in the transition state from closed to open loop. I think I am also going to make things a little easier by tapping the throttle plate position rather than pedal position for injector acceleration. I'll have to experiment with this one a little to see how it works out.

Then, I can finally start some power tuning. So far so good as I seem to have conquered the 4,500 RPM cut out as well as the boost issue. It looks like I am definitely on track to utilize the inlet restrictor to limit boost when all is said and done.

The new dual pulley is performing flawlessly with no visible signs of belt wear or slippage.

Tuning has been a bit of a pain with finding the right combination of clamp voltages for the maf and the map sensors. Then, throw in the fact that on your fuel map you have negative numbers under the clamp and positive numbers above it, with weird things happening during transition, plus the funny things the ecu does with the throttle position as opposed to the pedal position keeps things very interesting. Interesting and slow but not impossible!

So, I'm still here and still tweaking. I feel like I am finally making great progress although the time I have to dedicate to this is fairly limited. That said, I am looking very forward to recording some good numbers. I can say this, the closer I get the fuel the peppier she feels all the way around! Now is the part when all the hard work really starts to pay off!
 
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