Re: Request: injector scaling and maps
Posted: June 17th, 2022, 11:03 pm
Thanks for verifying your injector setup again, I just wanted to make sure I understood.
You might be able to make adjustments to the fueling and Tip-in to improve things in the lower rpms.
Perhaps even slight adjustments to the timing.
You can always play with the Throttle Control table to make it feel a little snappier.
You may need to consider tweaking the Cranking Injection Pulsewidth table if you continue to have trouble starting.
(I'm assuming the ignition is healthy?)
Unfortunately I have no hands on experience with the 4 port.
The VDI (Variable Dynamic Intake) on a 6 port opens at 7500 RPM.
This obviously maybe lower on the 4 port Auto due to the reduced RPM Limit.
However it also could by the SSV opening around 5200 RPM.
The SSV opens based on Engine Load, RPM and Throttle position inputs. Its typically accepted that it will open in the range between 3250-5500 rpm (on a 6 port).
Again sorry I've not seen what mapping tables are available on the 4 port but there should be a table for the VDI.
Is it set to 5200 rpm for the 4 ports (I'm genuinely curious) ?
Diagram of the 6 Port Intake and Control Positions (sorry I couldn't find one of the 4 port)
You might be able to make adjustments to the fueling and Tip-in to improve things in the lower rpms.
Perhaps even slight adjustments to the timing.
You can always play with the Throttle Control table to make it feel a little snappier.
You may need to consider tweaking the Cranking Injection Pulsewidth table if you continue to have trouble starting.
(I'm assuming the ignition is healthy?)
Unfortunately I have no hands on experience with the 4 port.
The VDI (Variable Dynamic Intake) on a 6 port opens at 7500 RPM.
This obviously maybe lower on the 4 port Auto due to the reduced RPM Limit.
However it also could by the SSV opening around 5200 RPM.
The SSV opens based on Engine Load, RPM and Throttle position inputs. Its typically accepted that it will open in the range between 3250-5500 rpm (on a 6 port).
Again sorry I've not seen what mapping tables are available on the 4 port but there should be a table for the VDI.
Is it set to 5200 rpm for the 4 ports (I'm genuinely curious) ?
Diagram of the 6 Port Intake and Control Positions (sorry I couldn't find one of the 4 port)