i'm planning to rebuild my motor and, of course, port it. i'm torn over which intake ports to use.
i'd like to use a half-bridge, but i'm a bit concerned with the emissions testing in OR.
if i don't use a half-bridge, then i'm going to use a streetport.

has anybody in OR passed emissions with bridge or half-bridge ports?

 

not possible to pass smog on even a medium size streetport,let alone a bridgeport,you won't get away with much porting.

 

not even a streetport? i figured that would be as far as i could go but i was just hoping...

have you or anyone you know tried it here in OR? what were the results?

 

I tried it in Washington on a freshly rebuilt mild streetported 12A with a brand new cat. Failed, but I was close enough that if I'd tried harder (premixing alcohol, tuning lean, etc.) I probably could have gotten it to squeeze by. But I didn't care; I had my waiver. Not sure how Oregon's standards compare to ours, but that might give you an idea.

 

any port = fail smog

 

percent..when did you have a 12a?

 

did you pass smog with a streetport? unless u have a descent ems to correct the fuel its likely gonna fail. also running the catalytic converters close to the motor helps get them hotter to burn the harmful fumes. with rotary heat, u can probably heat two universal cats. but i would only make them bolt in so u can remove them as they will likely melt if u run them all the time because of the rotaries high egt's.

 

i have two rx7's, onc to pass smog and one to drive on the streets

 

^ Shhh...

This was in mid-2006 after Jeff20B built a 12A for my first FB (the white one that I drove to the January Izzy's meet). I still have the 12A for now, I haven't swapped the 13B in yet.

 

My 7 passed smog in Seattle with Street port little over a year ago, But I still Have Stock main CAT (until this SAT then I get my MID-pipe!!) and airpump... That helped. It was pretty close to failing though.

 

I think you could get a small street port to pass, as long as overlap wasn't increased. Not to mention, a way to tune the engine. Throw some alcohol in there, pop some oxygen into the exhaust, and viola! CJ

 

well what im going to do is, i am building my TII w/ a half-bridge, but i am going to buy a NA engine drop it in the chassis i'm trying to drive hopefully i'll pass then drop the ported TII in after i passed emissions.

 

You're also still running your smog pump and a RacingBeat single tip which is more of a filter than most exhausts... For instance my HKS HiPower is pretty much just a resonator...

The fresh air to the cat and maybe a little denatured alcohol are your saving grace!

 

i think i'm going to go with a small streetport or stock ports then. i will still have all my emissions equipment
but i still need to pass. thanks for the input everyone.