If the calibration you are using is the original k24a2 then it's not great. The newer one's are superior. A/F is way off in closed loop and cam angles are for a stock car.T13R wrote: First off Cranny, are you able to elaborate on why the initial tune isn't good? Is it because part throttle and wot on the low cam aren't good? Is the AFR way off on the high cam, or fuel curves are too spiky and not smooth enough? Maybe because of the knocks generated or the cam angles look all over the place?
I know that for the RSX a 13.5:1 AFR is the best for power. Does this hold true for the K24 also? I've been looking over the logs and from the VTEC switchover on the initial tune until lifting off at high rpms, the AFR averages out to about 13.0:1. I've also been loading up the runs with Raz Dyno and Theta Dyno and so far the initial tune still seems to be the most powerful out of all the logs taken so far, but of course I know that this is a work in progress.
I know the low cam maps are running way too rich at part throttle and wot at the moment, but that also wasn't tuned yet. I've also noticed that all the logs seem to show rich AFRs almost everywhere on the low cam at part throttle and wot. I was there when the guy did the tune for my brother and I know he worked only on the high cam at wot. Also the guy's reason to add 2% fuel trim to cylinders 2 and 3 is that according to his experiences with the K24 (other projects), those cylinders seem to run hotter. I don't have any proof of that however.
I'd also like to give a clear breakdown of what is installed on the car:
- Hondata Intake Manifold Gasket
- Modified stock air box with K&N filter
- Free flow catalytic converter
- '06 TSX Throttle Body
- '06 TSX cams
- 45 Degrees VTC
- Headers and exhaust are stock (the filename of the tune is misleading)
@Slip_Angle, thanks for the explanation on the multiplexer. Also, the reason why the log was stopped at 5700 rpm is because he ran out of road and didn't get a chance at another run. As for the TPS settings, they are identical to what you have, 1% no throttle and 102% full throttle.
I appreciate everyones help and look forward to being educated a little bit more on tuning with KPro.
Your brother's engine setup with regards to exhaust and such are similar to mine so they should work well with my calibration, which I have been working on getting just right for months. Cranny knows what he's doing but since my calibration is 95% there for you already I encourage you to use it.. Feedback is always welcome too.
An A/F of 12.8 - 13.0 apparently ideal for k series motors including the k24. I tune for 13.0. I also agree with adding 2% fuel for cylinders 2 and 3. I have measured mine and they do run hotter than 1 and 4.
The bucking your brother describes with my calibration should be simple to resolve, so if you like we can work that out.