Tsukuba Tuning: Episode 1
Had some free time tonight as the wife was out with the girls. Seemed like the oportune time to put the MR through its paces. I searched over the Career races and found one that was on Tsukuba, and that the EVO was eligable for. Turns out the Semi-Pro 450hp race does just nicely.
Race 1 Default Tune (I just remembered that I didn't jot down the build, dang it.)
The car was stable but a bit understeery, similar to my brief tuning session the other night.
-Fastest Lap - 55.390
-Overall Time - 8:30.023
-Reward - $27,468
Not a bad haul for a stock tune on a decent build. Still off of my goal but promising for no tuning.
Race 2 Dropped 2 psi in the front tires to balance pressures
Car was still very understeery but the pressures balanced out so the car was more stable and more consistant.
-Fastest Lap - 55.673
-Overall Time - 8:29.650
-Reward - $27,784
Getting paid to tune is great, even though I wasn't as fast I was .400 faster overall. I'll take consistancy gains along with hotlap gains. The goal is repeatable speed.
Race 3 Added Tonka/Blooze tune (54.5% Bias with a stock 71% SWR)
Car immediately felt more controlled, better balanced and turn-in improved. Tire temps are out of whack, over 25 degrees difference inner to outer on the fronts. Rears are 50-60 degrees colder. Suspension balance didn't improve tire temp balance.
-Fastest Lap - 55.485
-Overall Time - 8:33.726
-Reward - $27,636
An off on lap 5 shot my race time to hell but it does show that I'm not babyin this thing, I'm pushing it.Tire temp issue is causing problems and the changes in the suspension are causing the consistancy of the car to diminish over 9 laps.
Race 4 Camber Change, -0.9 Front, -0.7 Rear
Oh, boy, what a HUGE difference. Car is a turn in monster, grip is very improved, mid turn understeer in gone, power able to go on much sooner. Attempted later braking points. Default gearing rears its ugly head.
-Fastest Lap - 55.579
-Overall Time - 8:26.808
-Reward - $28,735
Much faster overall, much more consistant and over a second faster initial lap. I spent less time watching tire temps and more time wondering why I'm shifting so much. Damn default gearing. Still 50 degrees difference front to back tire temps.
Race 5 52.5% Blooze Tune with same SWR.
Lower tire temps in the front and more rear grip means even faster on the gas, less tire fade over the course of the race, and a very predictable car.
-Fastest Lap - 55.262
-Overall Time - 8:27.826
-Reward - $28,735
Locked up the brakes going into turn 1 on lap 5, shot a promising overall time but set a very quick fast lap. Moving some of the weight off the front helped tire temps a lot. Rears still colder, but the fronts are now only 5-7 degreees difference across the contact patch. Inner tire is at over 200% slip on the tighter turns when getting on the gas, seems diff lockup is too high.
Race 6Lowered Accel Diff setting on Front to 25 (thanks Spiny)
Understeer returns?? Getting on the gas doesn't pull the front around as much so I have to pay close attention to the car all the way through the turns
-Fastest Lap - 55.340
-Overall Time - 8:27.212
-Reward - $29,052
Noticably slower on all the turns and was a gear down due to not being able to get on the gas as soon. I don't want to undo it yet but I will note that this change makes the car feel much slower and its still setting good times.
Race 7Adjusted the Torque Split to 55%/45%, perhaps this will wake the front back up.
Feels somewhat better and it is pulling the front like it was however the inner wheel spin is reduced. I think I found how to balance one of my issues.
-Fastest Lap - 55.412
-Overall Time - 8:31.004
-Reward - $29,052
I knew this was good but the times didn't agree. This set the fastest first lap time in the 58's. However I tried to leave the car in 3rd gear for most of the track to eliminate all the shifting. I think using 3-4 instead of 2-3-4 is the ticket, it has more torque than hp so I should use it right! Default gearing is too long for effective use but I'll address that eventually.
Called it a night and hopped online for a few races, never on a short track so I was in power mode. As far as the Evo, I think I need to add downforce and see how that affects the changes I've already made. The times are dropping but no HUGE changes yet. Far improved over my old PB so I am improving at least because of the car. This isn't over yet so I'll stick to it, and the $120k I made just driving this thing and watching the saved telemetry made seeing the effects of the changes very good. I really feel like I'm a crew chief instead of a driver when I look over the replay's. Now to make heads or tales of all the information.