![\"Torque](\"http:\/\/caddyinfo.com\/wordpress\/wp-content\/uploads\/2013\/06\/MBT-Test-2013-06-07-6400.jpg\")
<\/a>Torque and HP vs Timing<\/p><\/div>\n
This graphic shows Delivered Torque in blue, Calc Hp in green, and timing in red.\u00a0 During this run I had also made a small adjustment to 2-3 shift points so that we get closer to redline in 2nd before the shift.<\/p>\n
Test:<\/strong> Our focus is on 6000-6700 RPM — does the HP drop off with less timing, or does it stay on an up-slope?\u00a0 My observation is that it stays on an up-slope.<\/p>\n Virtual Dyno runs<\/p><\/div>\n I also captured 2 virtual dyno runs, on the same road, same day, same direction.\u00a0 The first was with the intercooler temps lower, and the 2nd just after the 1st so with intercooler temps higher.\u00a0 Clearly the results are sensitive to intercooler temps, as well as normal variances in test method, etc.<\/p>\n Although the first run in red slows an early spike that over-shadows the high RPM performance, in neither run does the performance fall off a cliff past 6000 rpm, which is what we are looking for (above 400 whp is a good result in this range).<\/p>\n HpTuners gauge snapshot at peak RPM 2nd gear<\/p><\/div>\n The reduction in timing to 23.5 degrees appears to make power similar to the higher timing point — no disadvantage from 6000-6600 RPM.\u00a0 We want to run the least timing that produces equivalent power, so this seems a good result.<\/p>\n The slight adjustment in 2-3 shift points was successful at getting better high-rpm data in 2nd for testing.<\/p>\n","protected":false},"excerpt":{"rendered":" Today’s test is a consideration of if a Cadillac STS-V supercharged VVT DOHC 4.4L V8 will make more power or less power with slightly less timing at 6400 RPM.\u00a0 I am using Hp Tuners to data log and for one … Continue reading <\/a><\/a>Conclusion<\/h2>\n