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yeah ... umm are you sure its 86% duty cycle on 60's ? thats like 500 crank horsepower worth of fuel at 86% duty cycle..... dyno says its not making anywhere near that much, so unless you are drowning it at something like 9:1 on the wideband, then I think the duty cycle calculation is out or something else is wrong :S

Jayme wrote:yeah ... umm are you sure its 86% duty cycle on 60's ? thats like 500 crank horsepower worth of fuel at 86% duty cycle..... dyno says its not making anywhere near that much, so unless you are drowning it at something like 9:1 on the wideband, then I think the duty cycle calculation is out or something else is wrong :S

Is that taking into account the E85?

that explains it!! I forgot about the E85.....

Jayme wrote:yeah ... umm are you sure its 86% duty cycle on 60's ? thats like 500 crank horsepower worth of fuel at 86% duty cycle..... dyno says its not making anywhere near that much, so unless you are drowning it at something like 9:1 on the wideband, then I think the duty cycle calculation is out or something else is wrong :S

You had me worried there for a minute.

Pretty successful weekend at Gatton Street sprints, although we suffered a couple of failures on the Saturday. After the second runs, we had a failure of en engine mount, but pushed on and by the end of running on saturday had a major Harmonic balancer failure. Baz, the other driver was 2nd in class and I was 4th at this stage. We were unable to source another balancer sat night to sunday morning. We decided to have baz try complete his 75% runs on sunday to hopefully hold onto his second placed time and we were successful.

We beat out quite a few pretty "hot" cars, including a ls1 powered VX commodore and a warmed over VE clubsport, so over all pretty happy with the cars performance if a little disappointed I wasn't able to chase the pointy end of the field on Sunday.

Here's a clip of my second fastest run-



Please be kind

I also have ECU data from all of the runs if anyone is interested.

looks like the gearing of your car is spot on for getting just enough before the corner without having to change gears all the time!

Yeah, the 3.45 Diff gears combined with the T5 gearbox seems to be about spot on at most places we go to. The large amounts of torque produced by the engine at almost any RPM help with that also. Gear changes are pretty minimal.

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Had its day is my best guess.

lol, yeah fairly conclusive that!

The remedy-