South Bay Injectors
Thread Starter
Member
Joined: Mar 2016
Posts: 108
Likes: 1
From: Jackson, New Jersey
Car: 1989 Trans Am GTA
Engine: 5.7L 350 TPI (Deleted Cats)
Transmission: 700r4
Axle/Gears: Original 3.27
South Bay Injectors
https://www.southbayfuelinjectors.co...ctors-bosch-d3
https://www.southbayfuelinjectors.co...-tpi-1985-1992
I was just wondering, what is the difference between these injectors? I understand one is 22lb and one 27lb, but is there any important difference i should know? They both say they work for the 350 tpi but i just dont understand why the "lb" is different.
https://www.southbayfuelinjectors.co...-tpi-1985-1992
I was just wondering, what is the difference between these injectors? I understand one is 22lb and one 27lb, but is there any important difference i should know? They both say they work for the 350 tpi but i just dont understand why the "lb" is different.
Joined: Mar 2017
Posts: 4,255
Likes: 427
From: Portland, OR
Car: 86 Imponte Ruiner 450GT, 91 Formula
Engine: 350 Vortec, FIRST TPI, 325 RWHP
Transmission: 700R4 3000 stall.
Axle/Gears: 9 Bolt Torsen 3.70
Re: South Bay Injectors
They flow different amounts of fuel. Which you may need if you have a modified engine. 350 TPI engines use 22 lb injectors stock. So you must use a 22 lb injector unless you reprogram the computer.
GD
GD
Joined: Feb 2001
Posts: 8,494
Likes: 411
From: Sophia, NC
Car: 2016 Camaro SS + 1986 Z28
Re: South Bay Injectors
The term "work" can mean two things. First, they'll "work" meaning they fit into the manifold, and they have the proper connector/pigtail. Second would be the pounds per hour. One is the factory 22 lb. per hour, the other is 27 of course. As mentioned, without tuning, you'll want the factory 22.
Let's say you put on a bigger heads. You now have more air coming into the engine. You need more fuel to go along with it. Hence larger injectors. ...but not needed for a bone stock engine with bone stock tuning.
Let's say you put on a bigger heads. You now have more air coming into the engine. You need more fuel to go along with it. Hence larger injectors. ...but not needed for a bone stock engine with bone stock tuning.
Supreme Member
Joined: Jan 2003
Posts: 4,626
Likes: 313
Re: South Bay Injectors
https://www.thirdgen.org/forums/diy-...ctors-not.html
Joined: Mar 2017
Posts: 4,255
Likes: 427
From: Portland, OR
Car: 86 Imponte Ruiner 450GT, 91 Formula
Engine: 350 Vortec, FIRST TPI, 325 RWHP
Transmission: 700R4 3000 stall.
Axle/Gears: 9 Bolt Torsen 3.70
Re: South Bay Injectors
I think it depends on what PROM and which code the car is running. I played with changing the battery offsets, etc and the factory settings really seemed to work better with the more stable BLM's so I went back.
I've put 22's on a 90 Vette with no programming at all and it worked fine.
All that said, there are people that don't have perfect results.
If you can change injectors, then you can get a programmer, some chips, and an old laptop and with some help from the forum you can make it work. Honestly people have no business messing around with anything on a computeized fuel injected engine if that can't or are unwilling to handle the computer side of the equation. If you can't take that on, then seek out direct replacement original parts. Even then you can get over your head with basic repairs if you can't make peace with the ECM and it's sensors.
GD
I've put 22's on a 90 Vette with no programming at all and it worked fine.
All that said, there are people that don't have perfect results.
If you can change injectors, then you can get a programmer, some chips, and an old laptop and with some help from the forum you can make it work. Honestly people have no business messing around with anything on a computeized fuel injected engine if that can't or are unwilling to handle the computer side of the equation. If you can't take that on, then seek out direct replacement original parts. Even then you can get over your head with basic repairs if you can't make peace with the ECM and it's sensors.
GD