I'm not sure if this is a tuning issue, a bug, or some sort of hardware problem.

KPro III is showing reasonable IPW and IGN values while cranking, but as soon as it fires, the IGN drops to -20 and the IPW to 0. As you can imagine, the car immediately dies. I've checked the map and so far it looks okay. Any ideas?

I'm using the built-in KPro base map with the injectors modified for ID 1000 cc injectors and the MAP sensor modified for the SOS 3 bar.

Thanks.

Tim

Edited - Solution in next post.

 

I got it sorted out. It seems the ID 1000 cc injectors need to be listed as around 840 cc in the KManager software. I originally used 1015 cc (what Injector Dynamics says they should be). The 840 cc value came directly from Hondata in one of their posts on their forum. Someone else on there said they used 900 cc. At this point, all I've done is started the car and let it idle. As I do more tuning, I'll repost to let you know which of those values seems more correct.

Tim

 

This is especially odd because I had zero problems with those injectors on my old AEM 1012 box. They immediately started, idled, and all of my fueling was right where it should have been.

Tim

 

that's odd. the injector size is nothing more than a multiplier. maybe the main fuel map needed some tweaking.

 

It's a function of calibration data for the injectors. If the calibration data is correct, any injector (or sensor) can be swapped for any other without re-tuning. If you check Injector Dynamics website, they have detailed injector characterization data for HPTuners, EFI Live, and a bunch of other tuning software packages, but none for Hondata. Hondata says that they've seen a lot of issues with people using calibration data from Injector Dynamics. There's a 20% difference between the flow rate Hondata recommends for the ID 1000 versus the flow rate ID says the injectors are doing. At small pulse widths with a relatively large amount of injector dead time, that creates a big problem. Luckily, the fix appears to be quite easy so long as you're aware of it.

Tim

 

with ve tuning, yes if the injector size and the dead times are correct, there should be little to no re-tuning done once the injectors are switched. if the size is incorrect then it will throw off your map.

but yeah there is a difference with those injectors. fic rates theirs at 900cc.

 

My tuner used 880

Sent using free Tapatalk - Android FTW

 

Subscribed - Im putting in some ID1000 this weekend, so is changing the injector scale all I need to do? My 725s are currently listed on the kpro as 660, so 840 for the 1000s?

 

ID flow their injectors at different pressures, and give a flow number which is measured at a higher pressure and voltage than the industry standard 3 bar & 13.5V. Thus their ID1000 actually flows just under 900cc at 3 bar & 13.5V according to their own data tables.

However, there are inconsistencies in the published data from ID which makes me think some of the data was measured using different methods, or is just plain incorrect. eg for the ID1000, one table shows the injector minimum delivery at 3 bar and 12V at around 2.00 ms, but their dead time table has a value of 1.68 ms. 0.3 ms dead time is a very large difference for tuning. Also, with fuel delivery, the dead time table shows a maximum flow of 1015cc at 3 bar, but on the 3 bar table the maximum flow is just over 900cc at 16V.

 

Wow, maybe I should just let the tuner install them too. I dont wana input an incorrect setting and kill the new motor