I have an 1989 Cadillac brougham with an Oldsmobile 307. I have been in the prosses of taking of all of the emmisions control stuff. I was wondering what would happen if I replaced the e-qjet with a Holley 600 but left the distributor alone and hooked back up all of the nessesary hoses and lines. Also this car has no A.I.R. pump.

 

Welcome. To answer your question about the carb swap, the answer is that the car will run like crap. You should understand what each part of the emissions control stuff does and how removal will affect the car.

First, the Computer Command Control system on your 307 controls both the mixture on the primary side of the carb and the timing advance in the distributor. The computer requires the throttle position sensor in the carb as well as other sensors (MAP, baro, temp, VSS) to control the distributor advance curve. Remove the stock carb and you lose the TPS, which drives the computer into a limp-home advance curve.

You either need to retain the computer and equipment or change both the carb and distributor to non-computer controlled versions.

Removing the A.I.R. system (smog pump) will free up about 0.5 HP that it takes to turn the pump. Removing it may also cause the converter to overheat if you still have a cat in the exhaust.

Removing the EGR valve often causes part throttle detonation in the 307. The carb and timing are set up lean at light loads to take advantage of the EGR for improved economy. The EGR is only active at light loads under part throttle. A properly functioning EGR system has no affect on wide open throttle performance.

The evap system uses zero HP and recovers gasoline vapors that would otherwide go into the air.

The EFE system only operates when the engine is cold to allow it to warm up faster.

 

Thanks for the speedy response. One more thing puzzled me. Will some of the hoses from the old qjet hook up to the holley carburetor and function properly never messed with them much.