Trade-off for having maximum fuel efficiency

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Trade-off for having maximum fuel efficiency

i have heard from other people too and recently someone posted on this website as well about having very good fuel consumption.

My question is:
In ordinary (not technologically advanced) carburetor engines like most suzuki cars have (for example referring to khyber posted by someone; SA310 engine i guess)
how can one achieve this type of fuel consumption? (that guy says 20KM/Lit,) what are the trade-offs having this extreme setting in favor of max. fule?

can someone comment please.

Gari.pk User 1607 asked on 22 Jun 2010 15:46:42 pm

1 Answer

317 views |

Muzammil - on 22 Jun 2010 15:46:53 pm

Firstly and foremostly, I find the gentlemans' claims to be incredulous. There is no way and i'll bet you any money that he's getting 20kpl WITHOUT losing the all important vehicle driveability. We litre-tested the brand new Cuore at Rawal and the highest it pulled out was a 24.2kpl, in over drive with the vehicle speed under 80km/h. Keep in mind that the Cuore has a 847cc three cyl and it is brand new!
The engine have adjustable setting related to most features to account for wear and tear and other general tolerances. The engine operates over a broad band, meaning , low-ebd, mid-range & top end which also translates into driveability. There's always an optimum setting on the engine that allows improved driveability in all the regions, be it slow moving traffic, highway cruise or a hilly climb and to achieve it, the A/F ratio has to be Stichiometric. A lean fuel mixture (too little fuel for the amount of air in the cylinder) can cause an engine to stumble or give a rough idle as well as to run too hot, overheat, and cause a lack of power as well as engine failure. A rich fuel mixture (too much fuel for the amount of air in the cylinder) can cause an engine to �load up� at idle, foul the spark plugs, and also lack power or run sluggish.