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I live in az and have an 83 z28. It's got a summit racing engine put in it. Headers that I don't know the brand a 3 inch pipe to. Flowmaster with dual exhaust. If I put a high flow cat on and tune down the carb will I pass emissions? Side note It has the canister it's just not hooked up
I live in az and have an 83 z28. It's got a summit racing engine put in it. Headers that I don't know the brand a 3 inch pipe to. Flowmaster with dual exhaust. If I put a high flow cat on and tune down the carb will I pass emissions? Side note It has the canister it's just not hooked up
Passing emissions is a matter of balancing the 3 parameters. HC CO and Nox. It’s not as easy as “tuning down the carburetor”
Don’t expext to pass the first time, or possibly even the first 3 or 4. Each test will point you in a the direction you need to go until you find the balance, because each parameter effects the other. Although Nox is a little bit independent of the others.
You’ll also need to make sure the evap system is tight, because they’ll leak check the system.
You’ll get lots of advice on tricks to try. For xample, I can tell you adding alcohol (I used methanol 8 to 1 mix) and retarding the timing works well.But if you’re in left field overall, this won’t be enough. Take some time to learn about it and you’ll get it figued out.
This took me 3 tries to get here with a stock 305 TPI. (AZ emissions)
Passing emissions is a matter of balancing the 3 parameters. HC CO and Nox. It’s not as easy as “tuning down the carburetor”
Don’t expext to pass the first time, or possibly even the first 3 or 4. Each test will point you in a the direction you need to go until you find the balance, because each parameter effects the other. Although Nox is a little bit independent of the others.
You’ll also need to make sure the evap system is tight, because they’ll leak check the system.
You’ll get lots of advice on tricks to try. For xample, I can tell you adding alcohol (I used methanol 8 to 1 mix) and retarding the timing works well.But if you’re in left field overall, this won’t be enough. Take some time to learn about it and you’ll get it figued out.
This took me 3 tries to get here with a stock 305 TPI. (AZ emissions)
11-02-2017, 09:08 PM
which one
