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Old 09-10-2017, 11:31 AM   #1
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MSD Atomic aftermarket injection gets CA Approval!!!

Just found this out.

Doing research on what it entails but this looks interesting at $1250 ready to go.

https://www.msdperformance.com/produ...tbi/parts/2900

Instruction Manual;
http://documents.msdperformance.com/2900.pdf

https://m.summitracing.com/parts/msd-2900

https://arb.ca.gov/msprog/aftermkt/devices/eo/D-722.pdf
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Old 09-10-2017, 12:01 PM   #2
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This could be HUGE for our situations here is CA...

My particular MH was missing most of its OEM smog gear and it is proving almost impossible to find replacement parts... most of it is NLA, or only used and that is a crap shoot.

My questions to them I hope will be answered as I dont know if I can remove the Air Injection System and vacuum controlled items... that would be so nice not to have to sweat this stupid parts.
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Old 09-10-2017, 12:08 PM   #3
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This is an addendum to the installation manual that specifically discusses AIR injection systems... Mmmm.

Here is the important bit in the instructions...

AIR PUMP
Important: If your AIR system only puts air into the exhaust
manifolds, the Atomic system CANNOT be installed. The fresh air
being introduced to the exhaust will cause false readings to the
WB02 sensor.
If your vehicle is equipped with an air pump, close attention must
be paid to the air injection lines. GM used multiple types of air
injection control from the 1960's to the 1980's. All of the systems
used a belt driven air pump that delivers clean air into the exhaust system. Some of these systems used
a diverter valve to change where the air pump sent fresh air. Early systems with a diverter valve used a
thermostatic control valve (TCV) that diverted the air to the converter at 160F coolant temperature.
In later years, the TCV was replaced by an ECU, which did the same job.
During the initial setup of the Atomic, there is a selection for ‘Air
Pump Equipped’ (Figure 2). This must be answered to ‘Yes’ if your
vehicle is equipped with an air pump (the default is ‘No’). This will
make the closed loop function of the Atomic turn on at a higher
temperature to ensure that the diverter valve has switched and is
sending air to the converter. This way, the WB02 will receive the
true values of the exhaust gasses for the correct operation of the
Atomic’s self-learning and target air-fuel ratio.

http://www.lategreatchevy.com/assets...-3729-1-A3.pdf
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Old 09-10-2017, 01:21 PM   #4
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What happens if you remove the AIR pump and answer "no" to the question? The system would get an accurate read of exhaust gas temp and O2 levels. Might not be Kosher by law to remove the emission hardware, but the computer should be able to read the data correctly.
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Old 09-10-2017, 06:42 PM   #5
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Correct!

My question will be:
If I can no longer get the diverter valve for the air pump(True... NLA), can I remove the AIR System(Smog pump, diverter valve, and air injection tubes), and still pass smog?
I believe the is a system in CA that cuts you some slack if parts are NLA...

Watch this space... I am on this!
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