Smog pump?
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Joined: May 2005
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From: columbus, in.
Car: 1989 pontiac firebird trans am gta
Engine: 355
Transmission: 700r4
Axle/Gears: 327:1 9 bolt
Smog pump?
I dont know much about smog pumps. The only thing I really do know is that I do not like them. What I am wondering is if they suck or blow air thru the tube that goes to the cats. What I want to do is make it an "evac." pump if it sucks. If I am going to run much boost at all I think I will need one and they are pretty expensive. If anyone knows or knows someone who has done something similar please let me know or leave me the link. Thanks
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
They blow through the A.I.R. tubes. Some have modified them to serve as evac pumps though.
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Joined: Dec 2003
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From: Newark, DE
Car: '86 Camaro, '02 WRX, '87 K5, '67
Engine: 350 TPI, 2.0turbo, 383 in the works, 289-4BBL, 232, A-head 4-cylinder
Transmission: T56, 5-speed, 700R4, C4, T176, semi-auto 2-speed
Axle/Gears: 3.73, 3.90, 4.88, 3.55, 3.54, 7.00
They don't make very good evac pumps. This isn't their intended purpose. They typically only have two or three vanes, where even a base model evac pump has four. They can't generate a significant pressure differential to keep the rings seated, especially in a turbo motor. I'd go with a MOROSO pump meant for this purpose.
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