Practical Reflash Tuning: Step 6: Confirm Calibration on the Road
Watch This Course
$229 USD $114.50 USD
-OR-
Or
8 easy payments of only $14.31
Instant access. Easy checkout. No fees.
Step 6: Confirm Calibration on the Road
02.40
| 00:00 | - With our calibration now complete on the dyno, I'm a big advocate where possible of confirming the tune on the road. |
| 00:08 | While the dyno is the best place to perform your tuning. |
| 00:12 | It's incredibly difficult to accurately replicate the air flow and conditions that we're likely to see with the car out on the road at speed. |
| 00:22 | Since this is where the car is going to spend it's time, I always like to test and confirm that the air fuel ratio matches what I saw on the dyno and that the engine isn't suffering from knock. |
| 00:36 | It's not uncommon to find that we may need to make minor adjustments to the air fuel ratio when we test out on the road. |
| 00:44 | Or that we may find the engine seems more prone to knock in one or two areas. |
| 00:50 | This is where the data logger really becomes valuable and we can scan the ECU while driving to see what's occurring. |
| 00:58 | In particular I like to data log the engine performance in three different areas. |
| 01:04 | First, I'll scan the engine under normal cruising conditions at both motorway speed and around town. |
| 01:12 | Here I'm looking specifically at what the fuel trims are doing as this is a guide to the accuracy of my MAF scaling or my VE table and my injector scaling. |
| 01:23 | At the same time I also want to make sure that under these light load conditions no knock's being registered. |
| 01:31 | Next I'll look at the wide open throttle performance and specifically I want to look at how the engine responds under high load and sustained high RPM. |
| 01:42 | Which is what we could expect under heavy abuse. |
| 01:45 | This is essentially the worst abuse the engine's likely to encounter and if everything checks out here we can be confident in our tune. |
| 01:55 | Here we're looking at the measured air fuel ratio and knock feedback. |
| 02:01 | If the engine's turbo charged we also want to pay close attention to how well the boost is tracking against our target. |
| 02:09 | Lastly I will also check the engine performance under transient conditions such as fast throttle applications and gear changes for a manual transmission. |
| 02:20 | Here we're looking for smooth response to throttle input, good control of air fuel ratio, no knock and no over boosting in turbo charged cars. |
| 02:32 | If any problems are noticed we can then address them and test again. |
