I have a Haltech Elite 1000 in my FB with an S5 NA motor. I started with a base map provided by Chris Ludwig and it's been a pretty good start. In some parts of my map though, the long term fuel trim keeps adding fuel, and it's touching 90% injector duty in some weird areas after I applied the long term fuel trim to the base map. Around 2500-3000rpm under load I'm in the 90s. Weirdly once I get up about 4000rpm injector duty is a lot lower. I have 4x RX8 460cc injectors in stages; could there be an issue with how the injector staging is set up leaving me with not enough fuel in that range? I can't think of another reason why it would use less fuel as the rpm rises in that range. Since the engine isn't fully broken in I've really only driven up to about 5000 rpm.

I'm getting ready to drive it 1000 miles due to moving so I'm trying to figure out any last quirks before hitting the road.

 

which staging method are you using? do you have a log with your primary and secondary duty cycles? seems early in the rpm band to need to stage in. also what do your injector characteristics look like?

 

Something isn’t correct. Let me know if you would like me to remote in and take a look at what you have.

 

The values in this table are not injector duty cycle, it's the VE table. The number should theoretically reflect the engines VE but treat them as arbitrary numbers.

 

This car had to sit for a while during a move and I put off looking into this further, but I was looking into this issue today and made some progress.

I had staging min and max set to 20% and 70%, but I was getting lean readings way down at 3000rpm or so which disappeared above 4000rpm - right when the secondaries come online. I think there is a delay in the secondaries coming online that is causing the engine to run lean when I go to open throttle between 2500 and 4000rpm. I changed my injector staging settings dramatically, setting the min and max to 15% and 30% so that the secondaries come online a lot sooner and my initial logs seem to show much lower AFRs in this range now. I'm going to keep driving and keep an eye on long term fuel trims to see if it's still throwing fuel at the wide open throttle 2000-4000rpm range and post back. It feels like I shouldn't need to do this, but maybe the RX8 injectors aren't keeping up? I have 4x 460cc RX-8 injectors in the NA S5.

Here are a few screenshots of what I was seeing before I updated the staging settings:

 

First, update to Nexus staging and you’ll have a much easier time. The 4x 460s are plenty big enough for an S5 NA. We ran 330s in our race car years ago.

 

Does it still have operational port actuators? I would have thought peak VE should be at higher rpm than that on even a stock port motor? That VE table looks like my series 3 felt when the carb needed a rebuild/new gasket and the secondary weren't operating.

 

The secondary ports are not yet operating. I have a broken actuator and haven't sourced a replacement yet. I do have VDI kicking in around the same RPM range but after tinkering with where that came online it didn't have a huge impact on AFRs. I'll see if I can get the Nexus staging set up this weekend and tinker though

 

Is the flow and dead times set correctly ?