Does the amount of throttle determine if the other cam kicks in at 6k rpm? I slowly got up to 6k and the other cam didn't kick in. Twice. When I tried it again but with more throttle it worked (noticeable sound and power difference; neither were there with slow, light throttle) Any thoughts?

 

Is this a K20 or an R18?

 

its an si, sorry I thought was understood

 

Never had any issues with mine kicking in no matter how slowly I accelerate to the vtec point. I hear a faint little blip in the engine noise where I can hear it kick in when I'm accelerating slowly, but it kicks in every time.

 

vtec only works at about half throttle and above.
cuz your m.a.p needs to be zero.
and its at zero from half throttle onwards.

 

there isn't an extra cam under your valve cover (other than the two already there)....it's simply switching to a higher lobe on the cams.

and yes throttle position determines vtec engagement along with other things like oil pressure and water temp.

 

Cool, thanks guys

 

was this right after you started the car after it sitting? because vtec wont engage until the motor is warmed up.

 

Must be since theres only 1 cam in the R18 ha ha SOHC

 

Yes.

 

nothing wrong with single cams. maybe not so much with the R18 but people are still doing big things with the D series.

 

No...he wasn't making fun of single cams. He was joking around about the fact that someone asked if it was an R18 (single cam) or a K20 (dual cam), when it obviously had to be a dual cam engine, according to the OP's question.

 

my internet interputation sucks sometimes

 

I know man, like Fiji said I wasnt making fun of the R18 just that the other Fiji asked if it was the R18 or K20. That made me LOL

I personally think the R18 is a pretty cool car compared to the others that are in its class. Id much rather have a base R18 than a hyundai eleantra or a Corolla or somethng like that. THey look clean with just some nice rims and get really good gas mileage. (not rice)

I would never mod the car though, dumb IMHO but ive thought about it from the other side and if you just want your car to sound sporty and have a little more power theres nothing wrong with that.

for the R18's

 

It's cool man.