pully next to alternator?
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
FYI:
AIR pump pushes air into the exhaust manifold during warmup.
The extra air re-oxygenates the unburnt fuel for combustion in the cats.
That in turn heats up cats faster.
Hot CATs help remove hydrocarbons. (CATs also help remove NOx).
After 5-min warmup, AIR pump shuts off. 1-min duration after warm-restart.
After 5-min warmup, ECM controls mixture (in closed loop operation). The system leans out and runs cleaner.
That's the theory anyway.
Besides cluttering up engine bay, it's not much of a parasite on power.
AIR pump pushes air into the exhaust manifold during warmup.
The extra air re-oxygenates the unburnt fuel for combustion in the cats.
That in turn heats up cats faster.
Hot CATs help remove hydrocarbons. (CATs also help remove NOx).
After 5-min warmup, AIR pump shuts off. 1-min duration after warm-restart.
After 5-min warmup, ECM controls mixture (in closed loop operation). The system leans out and runs cleaner.
That's the theory anyway.
Besides cluttering up engine bay, it's not much of a parasite on power.
Drifting
Joined: Feb 2008
Posts: 1,267
Likes: 27
From: Texas
FYI:
AIR pump pushes air into the exhaust manifold during warmup.
The extra air re-oxygenates the unburnt fuel for combustion in the cats.
That in turn heats up cats faster.
Hot CATs help remove hydrocarbons. (CATs also help remove NOx).
After 5-min warmup, AIR pump shuts off. 1-min duration after warm-restart.
After 5-min warmup, ECM controls mixture (in closed loop operation). The system leans out and runs cleaner.
That's the theory anyway.
Besides cluttering up engine bay, it's not much of a parasite on power.
AIR pump pushes air into the exhaust manifold during warmup.
The extra air re-oxygenates the unburnt fuel for combustion in the cats.
That in turn heats up cats faster.
Hot CATs help remove hydrocarbons. (CATs also help remove NOx).
After 5-min warmup, AIR pump shuts off. 1-min duration after warm-restart.
After 5-min warmup, ECM controls mixture (in closed loop operation). The system leans out and runs cleaner.
That's the theory anyway.
Besides cluttering up engine bay, it's not much of a parasite on power.
mine was gone when i got my car so just bout the pully kit
