{"id":16754,"date":"2013-06-16T08:46:14","date_gmt":"2013-06-16T13:46:14","guid":{"rendered":"http:\/\/caddyinfo.com\/wordpress\/?p=16754"},"modified":"2013-06-16T08:54:24","modified_gmt":"2013-06-16T13:54:24","slug":"continuing-to-build-data-for-comparison","status":"publish","type":"post","link":"http:\/\/www.caddyinfo.com\/wordpress\/continuing-to-build-data-for-comparison\/","title":{"rendered":"Retest2 Cold for Comparison and more RPM reversion oddity"},"content":{"rendered":"

Ran another cold test with the Amsoil eaau6065 filter.\u00a0 More odd results from Virtual Dyno — although I see the issue in the data file, I just don’t know what is causing it.<\/p>\n

Backstory:\u00a0 I continue to test & tune my 2008 Cadillac STS-V with the 4.4L Supercharged VVT, DOHC V8.\u00a0 Rated from the factory at 469\u00a0hp (350\u00a0kW; 476\u00a0PS) at 6400 rpm, 439\u00a0lb\u00b7ft (595\u00a0N\u00b7m) at 3900 rpm.\u00a0 Goal: 440 whp or 550 hp.<\/p>\n

\"Summary<\/a><\/p>\n

and here is a comparison with the previous test results:<\/p>\n

\"Comparison<\/a><\/p>\n

Different days, so equivalent given the test method.<\/p>\n

\"amsoil<\/a><\/p>\n

Another odd result reflected in Virtual Dyno on the 1st (red) run.\u00a0 I see the issue in the data file but I am uncertain if this reflects a data capture glitch, or an actual phenomena.\u00a0 You can see the same issue in the Hp\/Torque graphs above around 5500 rpm.\u00a0 These are x-y graphs, so that divot near 5500 rpm means that the RPM built to 5600, then went back down to 5500, then up through to the shift point — all during wide open throttle.\u00a0 I am unclear what is causing this.\u00a0 The 2nd run at the same day same site is shown in blue; although it also shows a lower RPM hp peak it is much closer to the expected values.<\/p>\n

\"amsoil<\/a><\/p>\n

I added a boost solenoid check to see if the boost solenoid was involved in the variance for the boost psi, but the solenoid remains at 100% duty throughout the scan.<\/p>\n

Even on this ‘cold’ run, we are running into IAT2 retard of 1.3 degrees at redline, reducing total timing to 22 degrees.<\/p>\n

Conclusion:<\/strong><\/p>\n