visual and/or sniffer good.

obd-II bad.

How can you pass a sniffer on a turbo Miata? With boost you're gonna be burning a helluva lot more fuel than it ever did N/A so even if it's a good mixture and good cat it's still gonna be over the stock limits won't it?

lol, really? when's the last time you got on a sniffer roller and they flogged the car?

they typically test at a sustained 15mph and 25mph, you're not in boost and if you can tune worth a damn, you'll pass with better numbers than stock.


would you like to see my last results?

https://www.miataturbo.net/attachmen...ine=1357754359

Ummm, every 2 years when I emissions test my car lol. They flog them on the rollers, take it up to 50-60mph. Accelerate and decelerate several times to simulate real world driving. Sounds like they hit about 5k rpm before shifting. Not everywhere is the South.

sounds like the operators just want to fuck you.

Could be. Could be that we care about air quality.

What would you suggest? I don't have to worry about visual or OBD, just sniffer. If I open the wastegate fully will the turbo build any boost at all? Like not even 1psi?

That sounds like a non-standard test. You should really look up what the testing actually is supposed to be in your area and report the shop to the state if they are abusing your car like that on the rollers.

Blue State Video:




My car would pass the CO test:


Test Process

1. An inspector guides the vehicle into the inspection lane and performs a brief safety check, enters the vehicle identification number (VIN) into the computer and makes a visual inspection of required emissions equipment. Customers go to an enclosed waiting area from which they can observe the inspection.
2. The vehicle is positioned with its drive wheels on the dynamome
   ter, allowing it to be tested under actual driving conditions. A fan is positioned in front of the vehicle to simulate wind and keep the engine cool throughout the test. During the driving simulation, emissions are collected from the tailpipe and analyzed. On the basis of emissions data, some very clean vehicles receive a "fast pass" while others have to be tested for the full four-minute cycle.
   
   An automatic "second chance" test is provided for vehicles that fail by a small margin. If the vehicle fails within 200% of a pollution limit, the computer will instruct the inspector to run a second test. This is done to minimize the chance that a vehicle might fail simply because of an anomalous situation. For example, the vehicle may fail because it was not sufficiently warmed up.
3. The vehicle is moved off the dynamometer and the gas cap seal test is performed. The customer is given a Vehicle Inspection Report detailing the test results and the inspection fee is collected. If the vehicle passes (and most do) you will be given a "Vehicle Inspection Report" when the emissions fee is collected. If the vehicle fails, you will be provided with a list of local repair facilities ranked by emissions repair success and a computer report providing useful information to assist the repair technician.

Sounds like Hilter runs CO. remind me never to visit.

You do realize there are lots of factory turbocharged cars, right? You're going to have to make sure to have a better tune, but there's no reason your car shouldn't pass the sniff test if you have a good catalytic converter installed and a good tune.

lolz

We are a non-standard state lol. Thanks for your concern but every technician drives the same and they drive my Miata exactly like they drive my old Chevy. They follow a computer screen and don't deviate from what it says.

Haha you sure you could pass? It's a 4 minute driving test. You can't pass with boost that's my point. Trying to get info, can you answer my question?

I don't mind wrenching on my car every 2 years to pass emissions if it means my view of the mountains isn't interrupted by terrible smog and there is still wildlife living in my backyard.

The difference is that those cars had emissions targets set for them in light of the turbo. A Miata doesn't. I have to match the factory emissions from 1996 which is impossible if it's burning more fuel.

I could EASILY pass.

How can you not pass with boost? I figured WRXs and STis would be very popular in CO. I'm sure those pass, stock and modded. And the WRX did not have easy targets, only the STi did.

Cuz they say "stock Miata allowed to put out this much CO2 in this amount of time" then they drive my Miata on the rollers, build boost and that limit is smashed.

Stock WRX is stock...

Thanks for the help dude! Can you explain how to bend the laws of physics?

Suck at tuning less.

this.

Do you not understand that more fuel in = more carbon out?

Its measured in parts per million, stupid. in other words more air = more fuel =~ the same ratio of carbon particles to total particles.

And in boost you need richer AFR otherwise you have to pull tons of timing then you fail Nox.