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After the break-in period, I decided to get a conservative tune before pushing it with meth or e85. As you can see in the dyno graph there is a dip during wot acceleration under boost. On the road it feels like fuel cut or boost cut, the car momentarily bogs down and takes off again. There is no hiccup if I accelerate slowly with partial throttle.
My tuner said it may be because of too much secondary injectors however he was doing long distance/remote tuning and I see plenty of people here running a similar setup to mine.
Any ideas what can be the reason; is it the tune or the injectors or something else?
What are the AFR/Lambda numbers doing when you cross that dip? What about primary & secondary injector duty cycles? Hopefully that data was logged along with all the other key figures (i.e.., MAP, RPMs, coolant/intake air temps, throttle position, etc.) because the HP/torque curves alone can't tell you jack about why there's a dip there.
But I'd agree it's probably a secondary staging issue; recommend taking a close look at how your Haltech is managing the transition.
I forgot to mention before, I have the Sakebomb ignition system. Attached is the log file. It was saved as an excel sheet for some reason. I also have the tune file but couldn't upload here because of file format.
The tuner tried to smooth out the transition but he was unable to do so. His conclusion was secondary injectors were too big. My buddy thinks we should downsize and change the injectors to ID injectors because Bosch EV14s are CNG injectors. I am ok with changing my setup if necessary.
What would be the tried and true injector setup which would work with both pump fuel and e85 @ 500hp? And any recommendations on reputable tuners who do long distance tuning?
04-23-20, 08:07 AM
