Ice_warmer
Well-Known Member
Is it just me or (i'm talking about a 105hp renault engine here) at more than a quarter throttle there is next to no diffrence if i press it to the floor or not, acceleration wise
Thats why good race engines have a butterfly per cylinder - it makes the engine more responsive across the rpm range
nope, that's to keep the distance between the throttle valve and the cylinder valves as short as possible. the shorter this distance, the responsier and revier the engine will be...results in less torque though
Sportier engines do not have two throttle butterflies (with the second opening after the first) unless they've got one of the various "variable length intake tract" schemes.
That partially explains why the GTIs have so many fuelling problems.
This also means that for the given external size of the throttle body, it's actually a restrictor and hurts maximum power. This would have been more easily resolved with a big throttle blade and throttle by wire.
true, but won't the engine be less responsive in low revs with a single big throttle blade?
and what has throttly by wire to do with it? i've always been told to stay away as far as possible from those...