LS4drCivic

Im wondering whats the deal with the "economy" Vtec on the engine, the ports are extremely small and its using roller rockers, im wondeirng what makes it "Economy" though, im not familiar wit hsingle cams at all any inf owill be appreciated, thanks

freakasis

well for starters the pistons are concave and there is almost no combustion chamber...that combined with the use of only 12 valves (1 intake and 2 exhaust) at low rpms creates a swirling effect that allows the engine to run with more air and less fuel...but at higher rpms this effect is mroe harm than good so the other intake valve opens and you left with somthing similar to a sohc 16v non vtec engine....anything else?

cxcivic

i had a friend that put a header/exhaust on his VX....it would run with the Si hatches at the time.... pretty surprising

atreyu06

If I remember correctly in the Haynes manual I had it said that the E in Vtec-E was for Enchanced Performance. but alot of people refers to the Haynes manuals as crap

Gixxer

The E stands for Economy.

When it hits VTEC it actually slows down the revs and you get better mpg's.

freakasis

thats because the si hatches are the heaviest ones and the vx's are the lightest ones....and after the "vtec" point the vx is basically just like a regualsr single cam without vtec.....that and the si's were prolly all stock with clogged air filters and bad drivers.

cxcivic

that must have been it...i suck at driving

EludeR

Actually the CX's where the lightest at 2050lb's.

freakasis

my bad i forgot about the sunroof on the vx

cxcivic

there is no sunroof on a vx...are you sure you drive a Honda?