Guest |478| Posted November 20, 2009 Report Share Posted November 20, 2009 This was recently done by a customer of mine (Joe Simpson of Tempest Racing in Maryland)... here are his comments (this will be promising when they get everything working right): you can clearly see the boost fluctuation in the graph. the more duty you gave it, the harder the boost would fall at high rpm (out of turbo, high back pressure, need c02 on the gate, etc). we were able to make several runs back to back with out even turning off the engine and have virtually no change in horsepower, which was a huge change from the previous ECU in the car. after taking this car off of the dyno, and putting another car on running the same ECU this car previously had, trying to do the same thing with out turning the car off we saw as much as a 35 horsepower loss from one run to the next (this was with both fuel and ignition temp comps set to zero). if there is that much of a fluctuation from one dyno run to the next, i can only imagine what is going on with a street driven application or a full 1/4 mile run at the track. makes you wonder! should also note would have liked to have spent a little more time on this car, but with breaking a transmission on the dyno and being a couple days behind schedule we had to rush there at the end. first pass with the vipec ecu the car did not move an inch, broke the final drive. they swapped transmission one more time, and the new one they put in would not shift into 2nd gear. he made a pass anyways just for the hell of it, and going from 1st gear straight to 3rd gear (and waiting a long time for power to come back up due to the rpm drop) and then just putting the car in neutral and coasting the car went 136mph. his previous best mph with the same engine/turbo set up etc was 135mph using all 4 gears i will try to get a couple pictures of the car here shortly -here is a short clip of the launch control -franz Quote Link to comment Share on other sites More sharing options...
Guest |478| Posted November 20, 2009 Report Share Posted November 20, 2009 launch control... burnout... -franz Quote Link to comment Share on other sites More sharing options...
Guest |478| Posted November 20, 2009 Report Share Posted November 20, 2009 engine bay pictures while exhaust was still being fab'd by Tempest Racing... Quote Link to comment Share on other sites More sharing options...
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