Quote:
Originally Posted by cujet
Those who have aftermarket, stand-alone engine management computers have done some interesting things with lean operation on very modern engines.
Lean operation requires more throttle opening, and the throttle by wire can compensate without driver input. Driveability issues are minimized with such setups.
My current "fun" car is a 2004 Turbo S2000 with stand-alone ECU, 8.8/1 compression, 19.5Lbs boost. It does not run lean under light loads, and does not return very good MPG's. (about 20) . My plan is to re-map the ECU for 17/1 operation under light loads. Those that have done this see overall increases to 25 to 27MPG.
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Amusing that you posted that. My car (before my STi) was an 02 RSX Type-S, 171k on the clock when I bought the new hotrod. Moderately modified (still N/A and stock from the valve cover to the oil pan) and with KPro leaning out and jerking around with the cam phasing I was able to achieve 33mpg combined, driving it like I stole it most of the time and idling to warm up the coolant to 130degF before driving.
That was with a 17-18AFR cruise, 15.5-16AFR warm idle, 50deg (maximum) cam advance at cruise; 12.8AFR and optimized for power output at WOT.
My point being that the K series (and its cousin the Fs) seem to have some significant efficiency potential with some know-how and a desire for it
