Oening up the IM

[Darkcloud]

Hey fellow tuner's

I want to know any gains of opening the IM ports. Meaning ridding 8 ports and opening them up to 4 port IM sort of like a poor man Euro -r intake mode without cutting deep into the runners. I know top end will be improved
but would smog be affected as well?

[wed3k]

depends on what type of smog...two speed idle or dyno smog?

it may affect a dyno smog because they load the motor up pretty well and if it bogs the shit out of it, then it will affect emissions.

[Darkcloud]

2 speed idle smog

[loud92CB7]

What about the low end power? What happens to that? Sorry to thread jack!

[wed3k]

it'll kill lowend a little bit. gutting the iab's out is purely for top end.

[Darkcloud]

Well what I had in mind was to keep the IAB plate stock for when I go smog my car the remove the iab plate and mount plenum to runner's.

I feel that with the unmodded IAB plate that should be okay smog

Wed3k chime in anytime

[wed3k]

that sounds like a good route, when is smog due?

[Darkcloud]

Not sure at the moment car is still down

[loud92CB7]

what can you do to the intake to bring the lowend out? i have an H23 IM ... sorry to thread jack.

[Darkcloud]

more compression I'm guessing. If I'm right just buy a thinner headgasket, maybe others will chime in, lowend won't suffer that much from what I read

[wed3k]

just to the intake? id probably keep it stock, a stock h23 will work well and even extend your rpms to 6k

[jdm92_accorn]

i got a stock h23im with double stacked iab's and it port-matched to my 68mm throttle body and mine has phenominal bottom end and it doesnt choke out past 6k. i used to shift at 7200rpm before the rebuild without any sign of intake restriction.