Quote:
Originally Posted by crabu2
That makes a lot of sense.. but the bottom line is that you can't get better mpg with any piggyback tune because none will remap fueling or bump up timing.. It seems on turboed engines, all they do is increase boost and let the factory tune handle everything else that might be needed for the increase in boost.
Would you agree?
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Well there are some what-ifs and I do not know what the end result is because you really need to know how the ECU is responding and I dont do this fulltime
the theory is:
if AFR is going lean you may get better output and thus efficiency but the tradeoff is your engine reliability will be down
in theory if the ECU is doing its job keeping AFR at stoichiometric then alls equal your efficiency should remain the same theoretically but in the real world you will likely experience losses (ie more blow thru and other losses)
I would say the only real way you get higher efficiency via boost is by going lean and thats damaging
but again with piggybacks its hard to know whats going on