They are not the exact injectors that were used for the original tune (the chip was developed for the MM 2.1L engine design, not custom burned for this specific engine). I guess that there was some sort of issue with the 24# EV6 injectors that were originally selected (pintles getting stuck open) so MM had me order some 24# EV1 ones. There is more to an injector than the static flow rate, but it's what the option was at the time. The chip was not re-tuned for the different 24# injectors.
I don't have the exact specs for the centerlines. But, based on the timing map for the grind and assuming that the lobes are symmetric about the centerline, the intake CL is 117deg ATDC and the exhaust centerline is 120deg BTDC. The combined cam CL is then 152deg BTDC (92deg separation between intake and exhaust CL's).
If someone local could tune Motronic 1.7, I would have gotten on a dyno and had a custom tune made LONG ago. Sadly, nobody in the region works with it and going stand-alone isn't something I have time for now (or in the foreseeable future).
I don't have the exact specs for the centerlines. But, based on the timing map for the grind and assuming that the lobes are symmetric about the centerline, the intake CL is 117deg ATDC and the exhaust centerline is 120deg BTDC. The combined cam CL is then 152deg BTDC (92deg separation between intake and exhaust CL's).
If someone local could tune Motronic 1.7, I would have gotten on a dyno and had a custom tune made LONG ago. Sadly, nobody in the region works with it and going stand-alone isn't something I have time for now (or in the foreseeable future).
Comment