MSM - Built block and upgraded turbo on stock ECU?
 

Been mulling over this the past month or so. I have an entire build planned out with a local shop...built short block, Fab9 manifold, EFR 6258, 1000cc injectors etc but what's stopping me is emissions with a standalone so any insight would be much appreciated.

Because i'll have to swap back to the stock injectors and ecu once a year will I have any issues with the larger turbo and built block (still 1.8) with the factory ECU? Obviously won't be ragging on it but just puttin' around slowly until I pass.

Where do you live?

Georgia, specifically Buford which is in Gwinnett County (once a year testing via OBD-II)

what specifically makes you think otherwise?

I'm not exactly that savvi when it comes to this stuff so I figured i'd ask before I mess up something. Coming from the EJ257 world where Cobb Accessports allow us to have OBD-II lol.

You're asking a super vague question and I'm trying to get you to understand how silly it is, so that you can re-structure it and put in the necessary legwork in asking intelligent quesitons.

I'm currently 12 years into building and tuning EJ257's, cobb hasn't offered obd2 readiness monitor enabling for years now.

For example: we despise people who ask stuff like: " guyths I'm about to turbo my miata, what are some things that I should know?"

like herp derp here's a master post to catch you up on the last 30 years of development

Got it. Feel free to delete the thread until I can make a more thorough post with the build, components, etc. I just didn't want to jump too far into the rabbit hole with a build on my 2004 Mazdaspeed Miata if emissions was going to be impossible on a stock ECU with an upgraded turbo and internal components (rods, pistons, bearings, etc.)

Probably misspoke on the OBD-II thing, I just meant I have no issues with getting emissions done via the OBD-II method on my 15 STI despite the mods and tune. How? I don't know I just pull it in and they run it, I pay, then drive off.

the short answer is: it will be just fine if you do it correctly. :)

every build could yeild different results. so would things like but not limited to exhausts components. its a giant can of worms kinda question. 4 quadrillion right answers.

The real solution would be to stuck with stock compression and have the entire package reverse to stock for testing. Anything else would require testing on your end. Or go in reverse and remove parts and test as you go. find the limit where you can test well with maximum parts left on.

I have a re-chipped '04 mazda-speed ecu + the paired immobilizer that can run 450cc injectors that will get you about 250+ whp. I ditched it as it was not easily tuned/upgradable and went with an MS3 and would let it go for a song. I'm pretty sure it passes smog; but likely not CARB legal. You could contact BEIG for a description. I think you'd need the ecu, the 450 injectors, the paired immobilizer and it's programed key; all of which I have.

As the MS3 just plugs into your factory din plug, it could also be easily removed and re-installed.

PM me if you feel that this might work for you.