do I really need bigger injectors?
12-11-2013, 02:25 PM
#1
do I really need bigger injectors?
I'm having a hard time seeing how.
It's a 1.6 @ 15psi, on MS1. Currently there are 550cc RC EV1 style injectors in the car. My last datalog of a 3rd gear pull to 7500 showed the DC at 98% with an AFR of 11.7 @ 192kpa. DC crossed 80% around 170kpa. This is a 40psi system.
Is this tuning or hardware issue?
It's a 1.6 @ 15psi, on MS1. Currently there are 550cc RC EV1 style injectors in the car. My last datalog of a 3rd gear pull to 7500 showed the DC at 98% with an AFR of 11.7 @ 192kpa. DC crossed 80% around 170kpa. This is a 40psi system.
Is this tuning or hardware issue?
Last edited by 90R; 12-11-2013 at 02:48 PM.
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12-11-2013, 03:34 PM
#2
No idea how useless and potentially devastating this advise will be, but I've been in the exact same situation and just ignored it. My first miata ran RC550 injectors on a MS1, I didn't really pay much attention to injector duty because I knew I had plenty of headroom. When I was going through a log I noticed it recorded over 100% duty cycle. I asked about it on the forum at the time, but never really got a clear cut answer. I just ran it like that until I ended up parting the car out and never had any issues.
I just kept a close eye on AFR's and on my fuel map. I never saw the upper right of my fuel map increasing abnormally in an attempt to compensate for the injectors being too small so I just kind of ignored it.
Here's the thread I made at the time: https://www.miataturbo.net/megasquir...y-cycle-35394/
I just kept a close eye on AFR's and on my fuel map. I never saw the upper right of my fuel map increasing abnormally in an attempt to compensate for the injectors being too small so I just kind of ignored it.
Here's the thread I made at the time: https://www.miataturbo.net/megasquir...y-cycle-35394/
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12-11-2013, 03:34 PM
#3
I'm having a hard time seeing how.
It's a 1.6 @ 15psi, on MS1. Currently there are 550cc RC EV1 style injectors in the car. My last datalog of a 3rd gear pull to 7500 showed the DC at 98% with an AFR of 11.7 @ 192kpa. DC crossed 80% around 170kpa. This is a 40psi system.
Is this tuning or hardware issue?
It's a 1.6 @ 15psi, on MS1. Currently there are 550cc RC EV1 style injectors in the car. My last datalog of a 3rd gear pull to 7500 showed the DC at 98% with an AFR of 11.7 @ 192kpa. DC crossed 80% around 170kpa. This is a 40psi system.
Is this tuning or hardware issue?
another thing to keep in mind is that the ecu calculates idc based on what you tell it about the injectors its running
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