Remove AIR system with TBI L03, any drawbacks?
Posted A week ago
Posted 3 days ago
Posted 3 days ago
I'll try and help, but I'm a 4th Gen guy and there are major differences in the AIR system between 3rd Gen and 4th Gen. And my reference here is the 3rd Gen Chilton’s manual. As far as codes go, I do not see any listed for the AIR system on any 3rd Gens, unless it is the one listed as “M/C Solenoid”, and that does not apply to your engine.
Deleting the AIR system will not affect how the engine runs, but it will increase emissions. So if you have a tailpipe test, it’s likely it won’t pass. If you have a visual inspection, the deletion will be obvious. The only “gain” from eliminating the system is a very minor weight reduction and eliminating the small amount of power required to drive the pump.
When the engine is cold, the air from the pump is sent into the exhaust manifold to help burn the unburned hydrocarbons resulting from the rich cold start A/F mixture. The heat from that combustion helps heat the catalytic converter up faster. It doesn’t start to work until it reaches ~600°F. When the engine is warmed up, the air flow is diverted to a port on the catalytic converter, in between the reducing and oxidation beds. The air reduces HC and CO emissions.
From a personal point of view, I would agree with keeping the system for preserving the authenticity of the vehicle. I'm also in favor of keeping systems that effectively reduce emissions. I maintained all emissions systems on my Formula until it became a “track only” car.
1994 FIREBIRD FORMULA
381ci all-forged stroker (Callies Stealth, Oliver billet rods, BME 2618-T61 nitrous pistons) - 10.8:1 - CNC LT4 heads/intake - Comp Cams solid roller - MoTeC M48 Pro engine management - 8 LS1 coils - 58mm TB - 74#/HR injectors - 300-shot dry nitrous - TH400 - Gear Vendors 0.78:1 O/D - Strange 12-bolt - 4.11 Pro-Street gears - AS&M headers - true duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP / 800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117 MPH straight motor
Posted 2 days ago
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