[Selous1908]

What’s up peeps!

Unfortunately for me, I live in good ol CA. Since I do want to pass smog when the time comes, I’m looking at some mods to throw on my car that’ll still keep me in the clear for CA smog ‘standards’. I’m looking at cams, maybe an upgraded SC, as well as any other ideas you all may have that’ll be good.

I own a 2020 ZL1. I currently have a Corsa Xtreme+ Catback Exhaust as well as a big gulp. (Those are easy to swap out for smog, ha!)

[SienarSystems]

Magnuson 2650 is CARB pending. Best bang for your buck in CA. I replaced my Rotofab and ported throttle body with the Maggie and couldn’t be more happy. Now I need tires

[Selous1908]

How much did you spend?

[radz28]

Originally Posted by SienarSystems

Magnuson 2650 is CARB pending. Best bang for your buck in CA. I replaced my Rotofab and ported throttle body with the Maggie and couldn’t be more happy. Now I need tires

+1. I'd like to plan to go this route, too. I have a standard RF already, and would like to add a 103 and Maggie.

What kind of power are you making with those changes? I remember you were about 640 in CARB-form.

[SFV1LE]

Originally Posted by SienarSystems

Magnuson 2650 is CARB pending. Best bang for your buck in CA. I replaced my Rotofab and ported throttle body with the Maggie and couldn’t be more happy. Now I need tires

Please explain more about how the 2650 will be CARB legal? I assume the 2650 needs an aftermarket retune, and I've never heard of a car that passes smog in CA with a non-factory retune.

When a tuner changes the ECU code, my understanding is that the CARB software that reads your ECU at a smog station will flag the car as FAIL vs PASS and immediately transmit this to the CA system. Only way around it is via a shady smog station, which I have nearby.

Is this not true with a retune for the Magnuson 2650?

[CW3SF]

Originally Posted by SFV1LE

Please explain more about how the 2650 will be CARB legal? I assume the 2650 needs an aftermarket retune, and I've never heard of a car that passes smog in CA with a non-factory retune.

When a tuner changes the ECU code, my understanding is that the CARB software that reads your ECU at a smog station will flag the car as FAIL vs PASS and immediately transmit this to the CA system. Only way around it is via a shady smog station, which I have nearby.

Is this not true with a retune for the Magnuson 2650?

Same in Denver CO area. ANY retune flags car as automatic FAIL.

[Mister Will]

Originally Posted by SFV1LE

Please explain more about how the 2650 will be CARB legal? I assume the 2650 needs an aftermarket retune, and I've never heard of a car that passes smog in CA with a non-factory retune.

When a tuner changes the ECU code, my understanding is that the CARB software that reads your ECU at a smog station will flag the car as FAIL vs PASS and immediately transmit this to the CA system. Only way around it is via a shady smog station, which I have nearby.

Is this not true with a retune for the Magnuson 2650?

When did this start?

[radz28]

There are plenty of turbo and blower kits that are CARB-legal out there (not just our cars, but I mean that in a general statement). Yes - they require tuning but there are kids out there.

Smog stations can see if you have any MILs that are active and stored. They can also see what monitors have passed or failed. They can also "check" they haven't been manipulated, if they really want to.

I think there was some misunderstanding or something has changed in the last year or something. At any rate - any of the FI-kits that are CARB-legal will be just fine. If you are concerned, you should be able to obtain the CARB-number for the kit, go to CARB's website, enter the number, and verify your application is on the exemption list. Unless this is new software that I haven't heard of (which I'm not arguing), there's not much to worry about. If it has a CARB-number that is applicable to your vehicle, and you don't modify the vehicle outside of the exemption details, you're totally fine.

[CW3SF]

Originally Posted by radz28

There are plenty of turbo and blower kits that are CARB-legal out there (not just our cars, but I mean that in a general statement). Yes - they require tuning but there are kids out there.

Smog stations can see if you have any MILs that are active and stored. They can also see what monitors have passed or failed. They can also "check" they haven't been manipulated, if they really want to.

I think there was some misunderstanding or something has changed in the last year or something. At any rate - any of the FI-kits that are CARB-legal will be just fine. If you are concerned, you should be able to obtain the CARB-number for the kit, go to CARB's website, enter the number, and verify your application is on the exemption list. Unless this is new software that I haven't heard of (which I'm not arguing), there's not much to worry about. If it has a CARB-number that is applicable to your vehicle, and you don't modify the vehicle outside of the exemption details, you're totally fine.

This is correct. I called Magnuson. They said that the CARB certification means that it’s legal in all 50 states. And it’s basically their system ALONG WITH their tune that’s certified. You will pass emissions as long as you run their tune. This is assuming they get the CARB certification.

[SienarSystems]

Correct, the Magnuson 2650 plus their supplied tune is pending CARB approval. If you install the blower only, use the stock throttle body, stock airbox and the Magnuson provided tune you’ll have a 50 state legal modification (assuming the blower/tune is ultimately approved by the CARB). My car is stock, exhaust, tb, airbox, and everything else with the exception of the Maggie and their tune. It made 641hp on the Magnuson dyno post surgery and 580 pre operation. I saw a Black Friday/Cyber Monday deal posted. I got a deal and Magnuson had my car for a few weeks to test, tune and build out their complete kit.

There are a number of CARB legal solutions for Mustangs and the SS; whipple and procharger to name a couple. Neither had a CARB solution, or plans for 1, for the ZL1. Edlebrock makes a 2650 for the ZL1 but does not offer a tune and I have no information on their CARB certification plans for the blower.

[airtroop01]

Edelbrock’s 2650 is also CARB legal with their tune. It passed. I’ve been on the fence about this vs the Maggy. Can get really good deals on the Edelbrock now though.


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[Mister Will]

All of the above is true. The S/C kits are carb legal with the manufactured supplied tune.

The dirty little secret is after the kit is installed and the tune download, the owner takes the car to a tuner and has it dyno tuned. The car will still pass emissions and no one is the wiser.

What was claimed is that the smog testing machines can now detect if a custom tune has been made and flunk the smog test. I know as of 2016 this was not the case. Is it true today?

[Oddspyke]

I suspect this is confusion about why the tuned cars are failing inspection. Many aftermarket tunes automatically defeat catalyst efficiency channels to keep your CEL off if you use high flow cats or a catless DP. This will cause you to fail inspection on any car in a state that runs obd2 readiness checks. Tunes that leave all channels ready (not defeated) should not cause you to fail inspection in any state. This same topic comes up all the time in the Cobb tuning forums for VW and Ford because all the OTS tunes and most custom tuners just turn those channels off.

[Mister Will]

Originally Posted by Oddspyke

I suspect this is confusion about why the tuned cars are failing inspection. Many aftermarket tunes automatically defeat catalyst efficiency channels to keep your CEL off if you use high flow cats or a catless DP. This will cause you to fail inspection on any car in a state that runs obd2 readiness checks. Tunes that leave all channels ready (not defeated) should not cause you to fail inspection in any state. This same topic comes up all the time in the Cobb tuning forums for VW and Ford because all the OTS tunes and most custom tuners just turn those channels off.

can't pass if the rear O2 sensors are turned off.