![\"run1gearshift12\"](\"http:\/\/caddyinfo.com\/wordpress\/wp-content\/uploads\/2013\/05\/run1gearshift12.jpg\")
<\/a><\/p>\nRun 1: From 1st gear the shift to 2nd started at 30 mph as programmed. The STS-V reached 6,180 rpm before shifting.\u00a0 The shift took 0.2 seconds.\u00a0 The 2-3 Shift started at 60 mph and the STS-V reached 6,310 rpm before shifting.<\/p>\n
<\/a>HP Tuners Information<\/p><\/div>\n
Run 2: From 1st gear the shift to 2nd started at 31 mph.\u00a0 The STS-V reached 6,378 rpm before shifting.\u00a0 The shift too 0.2 seconds.\u00a0 The 2-3 shift started at 60 mph and the STS-V reached 6,240 rpm before shifting.\u00a0 The latter is surprising since the logic appears to command the shift at 58 mph and not 60 mph.<\/p>\n
With a goal of raising the shift points to 6600-6800 rpm, my plan is to increase the 1-2 shift speed from 30 mph to 31 mph.\u00a0 In first gear, 140 rpm equates to 0.6 mph.\u00a0 So a full mph increase in shift speed may raise the shift point by 230 rpm or so from 6,380 to 6,600 rpm. For second gear, 40 rpm is around 0.6 mph, so 200 rpm increase would be 3 mph, or 58 mph up to 61 mph.<\/p>\n
I will plan to retest under similar circumstances to see how the changes effect the actual result.\u00a0 What do you think?\u00a0 The model predicts that hitting the proper shift points will produce a slight improvement in acceleration.\u00a0 Have you done these type of adjustments to your car before?<\/p>\n","protected":false},"excerpt":{"rendered":"
This morning I made 2 runs to determine current shift points during acceleration from a standing start. I ran the STS-V in “competition mode”; this mode apparently uses “Cruise mode” shifting, which was a surprise to me but means a … Continue reading