mazdatech3

has anyone put in j-spec cams in calif. and still passed smog. car on dyno smog thanks

Maxx Mazda

"Use the search Luke!"

TheMAN

shut up nick

Maxx Mazda

Sorry Edwin, didn't mean to steal your line...

TheMAN

what line?

there's nothing to search for

Maxx Mazda

I typed "J-Spec Cams" into thesearch field, and came up with 2 pages. That looks like something to search for to me.

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As far as I know the cams will keep yourt car smog-legal Mazdatech. I can't see any reason why they wouldn't.

zerocover

From what I hear no-one has even done it yet.
The 1.6l engines need a little lovin too, no one does anything with them.

Maxx Mazda

Quite a few people have done the J-Spec cams in the 2.0L... How do you know he was talking 1.6?

TheMAN

thats nice

you didn't see the word "calif" in the original post huh?

Shut up, go back to school and learn to read

Maxx Mazda

No, I saw it you fucktard, but why would cams alter theemmissions enough to make it non-smog legal?

C'mon Mr. "Protege Know-It-All," even you should have some insight here...

redrims

Tripoint engineering makes them for the 1.6L, but they don't keep them in stock. They make them when needed.

carguycw

The biggest effect that cams have on emissions is due to overlap, which is the time at TDC of the intake cycle when both the intake and exhaust valves are open. More overlap helps top-end power because the momentum of the hot gasses flowing out of the exhaust valve(s) helps to pull fresh air into the intake valve(s). However, more overlap hurts emissions at idle and low rpm because unburned fuel will be pulled directly into the exhaust. Therefore, for good emissions, you want very little overlap.

The FS-ZE intake and Mazdaspeed exhuast cams have more overlap than the stock U.S.-market Protege cams, so they are theoretically worse for emissions. However, these cams are pretty mild and probably won't greatly increase emissions out the tailpipe, although there will be a difference if your car is subject to tailpipe-sniffer tests. Some states (such as Texas) only require a MIL check for OBDII cars, and I have yet to hear about an instance where these cams lit up someone's MIL all by themselves. If this is the case, you are probably OK.

Maxx Mazda

Ok, I'm sorry. I should have said the following:

I'm not sure as to whether or not cams will affect emmissions. I've never explored the issue enough to get an answer.

carguycw

That would be an unburned fuel and air mixture. Superheated fuel vapor turns into really nasty smog.