I've had a chance to go back and play around with some of the cars. Yes, depending on the track, the Integra is about 5 - 6 mph faster in the straights, which is faster than I anticipated it being. Not entirely sure how I missed this in testing, but there we are...
So I went in and started looking around in the car settings and noted the power to weight ratios. Despite being within the right PP figures, the Integra appears to be overpowered with the addition of the turbo, having a much lower HP/kg ratio than the rest of the pack.
I think the solution to this is to run the Integra without any bolt on power mods; so stock with no turbo or engine upgrades. Now, this does bring the car down to 484 PP, however the HP/kg ratio is now 3.03, which is right in the middle of the power range. I've testing this with a few of the other cars tonight and got very close times in all of them. Those who do have this car can do the same and give us the results. I'd like to keep this car in the series.
We'll have a practice room for Monza this Tuesday night. I would like to try this out with most of the group together, particularly those who will be in Integras. See you guys out there!