Neglected to fully inform y'all on Project Evo's most recent testing barrage a few weeks ago, so here are the rest of its test results.
To recap, we were (finally?) testing the AST coilovers by Vorshlag and Bridgestone RE-11 tires:
Skid Pad: 0.99 g
We sent Josh Jacquot out on the skid pad in the Evo with no changes to the alignment, damper settings or ride height we run on the street. With a single tire pressure adjustment, grip crept up from 0.98 to 0.99 g. Bam. Just like that. No other changes.
There's little doubt that the 1.0-g threshold could have been annihilated had we spent more time dialing in the car, but it was a busy test day that did not allow such a luxury.
Recall that Project Evo turned 0.93 g with these very same tires on the stock suspension. As expected, increasing static camber and roll stiffness has definite advantages when it comes to grip.
Notes: "Better balance after tire pressure change, but still lacks stock car's ability to hold slip angle around pad. Overall, understeer balance."
Slalom: 71.3 mph
Slalom speed increased compared to stock (70.3 mph) and with the RE-11s only (69.9 mph) due to the car's improved turn-in and ultimate grip. More than ever, though, the Evo still doesn't like to slalom--the active yaw control system simply can't keep up with the aggressive vector changes induced by the slalom, and adding more mechanical grip has only exacerbated this tendency.
We discussed the car's behavior with the Vorshlag gang. They weren't surprised, having observed the same phenomenon. They suggested some setup changes that would allow it
to work well in the slalom, but agreed that such a setup wouldn't have much relevance to real-world or roadcourse duty anyway.
Notes: "Nervous during fast transitions. Wants to spin. Hopefully this setup will work better on the track where the transitions are less radical. Instant turn-in and steering response. Wow!"
And then we re-tested Project Evo's acceleration to quantify the effects of the bigger GT30R turbo. We mostly found frustration. Jump with me.
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Categories: 2008 Mitsubishi Lancer Evolution GSR