Blooze I can't really tell you why I do this or that. I am what I call a hit or miss tuner and all I can tell you is I know when I have stumbled on to something that works for me. I am never happy to leave things alone and the 50% ARB was just to see if it would work with the default spring settings and it was pretty good. I went back and started making changes to the ARB's up and down along with the springs and shocks, more HP less Tire/grip more weight and all it got me was a harder to drive car the was slower.
Last night I went back over the build and changed a few things and ran then the car at the same 6 tracks testing 3 different tunes. One tune was yours that you listed and was very good the other to were, well different but worked well for me. I will post all my findings later to day.
Don
The build
Motor stock
race brakes,shocks,springs,ARB's
race weight reduction
sport trans and driveshaft
race tires 245/255-17"
torq thrust wheels
forza rear wing/spoiler
375hp 4.5
480tq 5.2
2,962lbs 5.8
52% 5.9
5.2
#1 #2 #3
Blooze tune my tune#2with 50/50 ARB my tune from hd3
-1.0/0.8 -1.0/0.8 -0.7/0.6
+0.1/0.0 +0.1/0.0 +0.1/0.0
5.0 5.0 5.5
12/12 12/12 19.60/17.00
708.5/708.5 700/680 700/550
7.7/6.8 7.7/6.8 7.7/6.8 carry over it worked...
7.8/7.5 7.8/7.5 7.0/7.0
4.0/4.0 4.0/4.0 3.2/3.5
aero145 145 145
48/102 48/102 48/102
diff 30/15 30/15 30/15
Bench Marks
#1 #2 #3
N/A 4.431 4.431
12.329 12.329
145.2 145.0
122.9 120.2
315.3 314.3
1.10 1.10
1.04 1.04
the tracks
#1 #2 #3
R.A.S. 63.643 63.799 63.505
Seb short 83.876 84.190 83.674
Tsukuba 64.428 64.134 64.352
total 211.947 212.123 211.531
C class rwd races
Tsukuba short 4 laps
48.452/3:19.995 48.205/3:19.774 48.383/3:20.082
Suzuka east 3 laps
57.400/3:00.353 57.621/3:01.014 57.242/2:59.709
Motegi east 2 laps
1:39.364/3:25.425 1:38.013/3:24.201 1:38.215/3:24.512
All three tunes work well for me each one has strong points. I still can't tell you why setups work for me but they do. Sometimes I start with the FM3 setup tool based on Feuer dogs V5.1 calculator and adjust from there. Other times I will go to my notes and look for a car thats close in weight and Front axle weight % then use that setup as a starting point. Blooze your setup/tune is good and I have it in my notes to try it on other cars.. I know how to tune I just don't know how to tell you how I do it.
I learn a little something new every time I read posts on this site, and don't have much to say but join in every now and then for a Challenge to see where I stand, I am still lap traffic but having fun.
totals fixed thanks for pointing that out.
Don
