B18CR+ITB+BC III Cams = maxxed-out ITR injectors?
Hey guys,
Had some tuning done on friday, and it was found that the AFRs were uncontrollably lean in the VTEC range. The fuel pump was measure to be flowing well (Walbro:thumbsup:), however the injectors were measured at 96% duty cycle.
I was surprised by this, I didn't expect stock ITR injectors to be maxxed using the stock bottom end. Modifications are essentially what would be classified as 'medium budget':
B18CR motor
Head: BC spec III cams, cam gears, valves, valve springs, retainers, ARP studs
Spoon thinner head gasket
Bottom end: stock
Intake: OER quad throttle (ITBs), TWM airbox, BMC carbon dynamic airbox with cold air intake from bumper
Exhaust: J's Racing 4-2-1 header, custom catback
I'm still learning these hondas, but I was surprised that I need to upgrade the injectors already. I've got some RC 370cc on the way courtesy of JDMYard:)
I'd hope if the injectors can't flow enough fuel, it means there's a little bit more air entering the engine now... so that should mean with bigger injectors and proper tuning we can get some more power?
Also, after doing a lot of research and speaking extensively with my tuner about ITBs+ECUs, it seems TPSvRPM tuning is what's required instead of normal MAP sensor which requires vacuum. To get a
I think some of the guys on here mentioned that I can get rid of the 'vacuum tree' set up if I use a HONDATA, because that's essentially only necessary when you're tuning of MAP???
I'd be interested to hear when others are changing their injectors?
regards
Shiraz