{"id":16674,"date":"2013-06-08T08:32:52","date_gmt":"2013-06-08T13:32:52","guid":{"rendered":"http:\/\/caddyinfo.com\/wordpress\/?p=16674"},"modified":"2013-06-08T14:35:41","modified_gmt":"2013-06-08T19:35:41","slug":"testing-toward-mbt-new-max-torque","status":"publish","type":"post","link":"http:\/\/www.caddyinfo.com\/wordpress\/testing-toward-mbt-new-max-torque\/","title":{"rendered":"Testing Toward MBT — New Max Torque"},"content":{"rendered":"

Today I continued my testing toward MBT by adding timing across the rev range to move the commanded advance closer to the MBT vs RPM vs Cyl Air table.\u00a0 1 degree of advance was added from 3000-3600 RPM, and 0.5 degrees from 3800-6000 RPM.<\/p>\n

The V was cold, in cool air, almost out of fuel.<\/p>\n

I went to a less densely populated HPTuners table to gauge if that improved the data capture.\u00a0 My impression is this was useful, but that we are capturing info as fast or faster than the related PID are updating anyway.\u00a0 I would prefer to have the more diverse info points than oversample a smaller set for future tests.<\/p>\n

\"More<\/a>

More timing makes more Torque<\/p><\/div>\n

This graphic shows today’s delivered Torque in blue, and the previous delivered torque in yellow.\u00a0 The current total advance in red, and previous in green.\u00a0 This shows that by touching up the timing the V gained ~5 lb ft of torque throughout the range.<\/p>\n

\"HPTuners<\/a>

HPTuners data delivered torque & calculated hp comparison to previous<\/p><\/div>\n

This graphic is the same info but with calculated HP compared current and previous.\u00a0 The actual high points were:<\/p>\n\n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n
<\/td>\nHp<\/b><\/td>\nRPM<\/b><\/td>\nTorque<\/b><\/td>\nRPM<\/b><\/td>\n<\/tr>\n
Previous<\/td>\n541.65<\/td>\n6585<\/td>\n453.0<\/td>\n3663<\/td>\n<\/tr>\n
Current<\/td>\n555.78<\/td>\n6710<\/td>\n471.0<\/td>\n3478<\/td>\n<\/tr>\n
Current<\/td>\n545.6<\/td>\n6573<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The previous test run topped at 6585 rpm where the 2-3 shift hit; today’s run was for 545.6 hp at a similar 6573 RPM.<\/p>\n

\"HP<\/a>

HP Tuners at Max Torque<\/p><\/div>\n

This is a hptuners snapshot at max torque point<\/p>\n

\"Hp<\/a>

Hp Tuners at Max HP<\/p><\/div>\n

and here is a similar shot at max hp point.\u00a0 I forgot to tell the car it was okay to shift to it redlined in 2nd for this test.<\/p>\n

\"Virtual<\/a>

Virtual Dyno comparison of previous capture and today’s run<\/p><\/div>\n

The virtual dyno run shows the low torque spike but only a 386 hp peak measured.\u00a0 Today’s run in red, previous odd run in blue.<\/p>\n

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

A 0-60 run measured from the HPtuners log took 5.17 sec without rollout.\u00a0 The PerformanceBox unfortunately didn’t properly capture the run so I don’t have a good figure for what it would have been with rollout.<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n
MPH<\/b><\/td>\nSpeed<\/b><\/td>\n<\/tr>\n
0<\/td>\n<\/td>\n<\/tr>\n
10<\/td>\n0.98<\/td>\n<\/tr>\n
20<\/td>\n1.70<\/td>\n<\/tr>\n
30<\/td>\n2.22<\/td>\n<\/tr>\n
40<\/td>\n3.02<\/td>\n<\/tr>\n
50<\/td>\n4.14<\/td>\n<\/tr>\n
60<\/td>\n5.17<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

I really wanted to capture MAF lb\/min but that was one of the things I did but should not have removed when lightening the HpTuners data table.<\/p>\n

Summary<\/h2>\n