I have just purchased an LT1 from a 96 TA, I have no emmissions laws for <1992 cars (89 TA).. She's on the stand.. I want to start shedding some smog. What can i strip off, and what are the consequences?

Thanks.

 

There is actually very little on that engine. The A.I.R. pump is electriclally driven, and only operates on cold startup, so it takes virtually no engine power at all, ,and the pump only weighs about two pounds. No gain in removing that. You can remove it to save some space, but must also remove the A.I.R. plumbing and seal it carefully to prevent leakage and false O² indications.

The EGR system is integrated onto the rear of the intake plenum, and uses a flexible supply tube from the RR exhaust manifold. There is no weight benefit, no space benefit, and no performancec gain from removing it. Actually, you will liklely lose power if you remove the EGR, since the chamber temperatures will elevate and the PCM will not be able to apply as much timing advance as it could otherwise before trtiggering threshold signals from the detonation sensors. Among the Impala SS owners I confer with, the hot trick for replacement is the EGR valve from the F-cars, since it is more reliable at elevated exhaust flows (from performance operation).

Unless you are planning to eliminate the PCM, you really can;t effecitvely remove much and expect any gains. If you eliminate the later generation PCM, you'll miss out on all the benefits of sequential injection and individual cylinder ignition timing - part of what makes the LT1 a more effecive package.

 

your trying to tell me that i have to figure out how to hook up all that smog stuff eh?

great