Hi there Group;
I'm looking for collective wisdom to as why we cannot properly tune my 13B-REW Single turbo without having a big hole in the power curve when the secondaries transition.

Has anybody successfully installed and tuned a FD3S/13BREW fitted with Siemens/Deka 850cc primary and 2200cc secondary injectors via an Adaptronic select ECU and managed a smooth transition? .. I have the Siemens/Deka secondaries: (Part number FI114212, 110333) set as 2430cc in the injector size table with dead time of between 12-14.5v of 64 (uSx10) or 0.64mS at 43psi and the Siemens/Deka (Part number: FI114992,110324) 870cc primaries dead time of between 0.19mS at 12v and 0.64mS at 14.5v ... The tuner notices an un acceptable transition on the dyno... have I missed anything?

 

Is it going rich or lean on transition? Have you had them tested?

Almost certainly dead time is a fair way out and flow rate might be a bit off too. You should be able to work out how much of each by chsnging target afr just at transition and at full noise and comparing the change in injector open time to the afr change. I want to familiarize myself Eugene anyway, happy for you to send me a few log files and matching tunes to crunch some numbers. It will be a bit time consuming changing and logging a bit more and less fuel but it will let you get closer without sending them for full characterisation and only costs you some fuel and time.

 

That ECU cannot actually drive those injectors.

YOU SHOULD NOT BE USING THAT ECU WITH THOSE INJECTORS. you have been warned.

 

Have you emailed adaptronic about it? I believe the max amperage that the select models can drive the injectors at is 2 amps per channel, and those might require a lot more in the higher rpms. I ran into this a long time ago, and I'm pretty sure I sent them a set of injectors to test all this on.

 

Don't the selects do peak hold?