Our LeGrand's latest numbers: 152 wheel horsepower out of 1000cc. That's pretty solid for a car that weighs around 800 pounds.
The curve is much smoother—and keeps rising at higher RPMs. A big improvement all around.
Our baseline testing for the LeGrand showed that we had about 138 horsepower. That’s not great—at least 10 ponies less than some of our competition. To solve this, we sent the ECU to Dynotronics Tuning to receive a revised fuel and ignition map.
Our initial testing of the revised ECU wasn’t so great—we saw no gains on the dyno and, in fact, saw some losses. About halfway through the pull, we noticed that our fuel pressure was dropping as the rpm was rising. Apparently our ECU’s new fuel map was overtaxing our fuel pump and fuel system in general. We solved this by installing a new fuel pump and filter from Integrated Engineering. See our previous installment on this upgrade.
That brings us to today, when we went to Superchips to see how things were shaping up. We were very pleased to see 151.8 horsepower—a solid 14-horsepower improvement from our baseline. The torque figures were also bumped up a bit—around 74 lb.-ft. at the rear wheels. These figures are nice and solid, especially considering how conservatively this particular dyno calculates and measures power.
With that under our belt, we’re going to return to the body and wing construction as the National Championships edge closer.
View all comments on the GRM forums
You'll need to log in to post.
