Injector size ?
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Junior Member
Joined: Feb 2005
Posts: 45
Likes: 0
From: pennslyvania
Car: 86 trans am
Engine: 305 tpi
Transmission: 700r4
Axle/Gears: 3.27 9 bolt posi
Injector size ?
I have a 305 with a mild cam and a edelbrock pro flo system with a ported plenum, performance chip, and any other bolt on performance parts you can think of.
I know factory a 305 came with 19lb injectors are these good for my setup or should I go bigger?
I know factory a 305 came with 19lb injectors are these good for my setup or should I go bigger?
Supreme Member
Joined: Jul 1999
Posts: 2,149
Likes: 4
From: Mims, Florida
Car: '87 IROCZ
Engine: 395 ZZ4
Transmission: ProBuilt 700R4
Axle/Gears: 9 bolt 3.70s
My recommendation to you is: Buy a good fuel pressure gauge and an AFPR. Before you install the AFPR, check the stock fuel pressure. Then install the AFPR. Your 19s can flow nearly 22# if you turn the fuel pressure up to 56psi (stock is 43psi).
With your mild mods, your 19s a plenty good and will keep things friendly with your computer.
If you got the money, get a good scanner too. Its a great tool to tune your car and it never goes out-of-date. I'm still using my AutoXray which is about 8 years old.
With your mild mods, your 19s a plenty good and will keep things friendly with your computer.
If you got the money, get a good scanner too. Its a great tool to tune your car and it never goes out-of-date. I'm still using my AutoXray which is about 8 years old.
Member
Joined: Oct 2000
Posts: 405
Likes: 0
From: Gulf Coast
Car: 1988 Trans Am GTA
Engine: 5.0 TPI
Transmission: TH700-R4
Axle/Gears: 3.27
I agree with doc, keep the 19# injectors. They are good for about 320 HP with 50psi. The added pressure on the smaller injector helps attomize the fuel better for a more complete combustion.
-Ozzy
-Ozzy
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