G4+ Force GDI for Kia Stinger

[AndySolo]

Hello,

I'm considering to take on a project on converting 2018 Kia Stinger 2.0 G4KL engine to run on Link G4+ Force GDI. Costumer had positive experience with the  Motec M142 plug-in kit running 6 cylinder G6DP engine so the idea is to develop a similar solution for 4 cylinder using Link. Is it possible?

[Adamw]

Assuming it uses solenoid injectors and a synchronous DI pump it should be capable of running the engine ok.  The problem however will be the CAN bus side to keep the rest of the chassis happy - dash, trans, stability control etc.  There would need to be enough demand for us to justify buying a car to reverse engineer the CAN bus.  

[AndySolo]

Thank you for the info. Our team's plan is to do all the work, including CAN communications. The main concern, since GDI tuning is a new area for us, was if Link ECU can run the engine.

[AndySolo]

On 9/22/2021 at 10:25 AM, Adamw said:

Assuming it uses solenoid injectors and a synchronous DI pump it should be capable of running the engine ok.  The problem however will be the CAN bus side to keep the rest of the chassis happy - dash, trans, stability control etc.  There would need to be enough demand for us to justify buying a car to reverse engineer the CAN bus.  

I found out that injector voltage peaks at around 60 volts, which suits characteristics of solenoid injectors, and fuel pump is cam lobe driven with a flow control valve (part number is 353202CTB0), I'm not sure if this principle of operation classifies as synchronous or not. With this clarification could you confirm that Link is capable of running the engine?

Also, I found out in Link G4+ software that only 6 CAN channels can be configured to receive or transmit data. If I understand correctly, that means I can only operate with 6 CAN IDs which seems like not enough. I encountered vehicles which required ECU to transmit up to 7 CAN IDs and receive the same amount for all OE systems to function properly, 14 CAN IDs to setup in total. Did I understand CAN setup in G4+ correctly?

[Adamw]

To confirm pump type you really need to put a scope on it, with a synchronous pump you will see an electrical  pulse to the spill valve every pump lobe (typically 4 lobes on a 4 cyl) - so those pulses will vary with RPM.  With a non-synchronous pump it will just be a fixed PWM signal (usually about 200Hz) that doesnt change with RPM.  If it is confirmed to be a synchronous type you also want to confirm if it is a normally open type (most common) or normally closed (rarer and not supported by Link).  To do this you can just unplug the spill valve with the engine idling, if it is normally open the rail pressure will drop to zero and the engine will stop, if it is normally closed the rail pressure will increase to the relief valve pressure but engine will usually keep running. 

 

8 hours ago, AndySolo said:

Also, I found out in Link G4+ software that only 6 CAN channels can be configured to receive or transmit data. If I understand correctly, that means I can only operate with 6 CAN IDs which seems like not enough. I encountered vehicles which required ECU to transmit up to 7 CAN IDs and receive the same amount for all OE systems to function properly, 14 CAN IDs to setup in total. Did I understand CAN setup in G4+ correctly?

Correct the G4+ only has 6 user CAN streams - 6 ID's.  This typically wont be enough to duplicate all the OEM messages in a car this modern.  There will also typically be other difficulties that require custom calculations like heartbeat messages, counters, distance, maybe check sums etc that would need custom code written.  As I mentioned earlier it is probably not justifiable for us to do that in this case, you would likely have to use a separate micro to generate the CAN messages.   

[AndySolo]

Once again, thank you for detailed information.