What size injectors do i need 89 350 IROC?
05-22-2007, 04:45 PM
#1
Junior Member
Thread Starter
Join Date: Aug 2006
Posts: 19
Likes: 0
Received 0 Likes
on
0 Posts
What size injectors do i need 89 350 IROC?
I'm trying to figure out what the stock injectors psi was for 1989 350 IROC ? It's a stock engine,tying squezze more hp. What would larger injectors 24-26lbs and hypertech thermomaster chip do for my 350 ?
05-22-2007, 05:02 PM
#2
Senior Member
Join Date: Oct 2003
Location: LaGrange (10min from Poughkeepsie), NY
Posts: 942
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1992 Camaro RS - not real slow anymore...
Engine: SPDC 360 MAF EFI /w a Holley Stealth Ram
Transmission: T5 untill it blows up from to much torque
Axle/Gears: Ford 9" /w auburn pro & 3.89's
Re: What size injectors do i need 89 350 IROC?
you're not gonna be gaining hp from just swapping injectors. Sometimes, injectors that are too big will hurt performance. ...and hypertech = trash
hp is gained by letting more air into the combustion chamber.. simple as that.
hp is gained by letting more air into the combustion chamber.. simple as that.
05-23-2007, 07:42 AM
#3
Member
Join Date: Dec 1999
Location: What?!? Am I still here?
Posts: 176
Likes: 0
Received 0 Likes
on
0 Posts
Car: Mullitt mobile :)
Engine: it's stock LOL
Transmission: 700rJunk
Axle/Gears: 2 much 4 street not enough for strip
Re: What size injectors do i need 89 350 IROC?
Stock PSI= 22#s. No need to change injectors until you start making mods to your engine (major mods not free mods). Even then you can get by with stock injectors and and an adjustable fuel regulator, so long as your injector duty cycle doesn't get much over 85%.
05-24-2007, 08:35 PM
#4
Senior Member
Join Date: Jan 2006
Location: Michigan
Posts: 793
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1987 Trans Am
Engine: 5.0L TPI
Transmission: 700R4
Axle/Gears: Richmond 3.73
Re: What size injectors do i need 89 350 IROC?
I did all the mods in my sig....the last thing I put in were the 24# LT1 injectors.
05-24-2007, 08:43 PM
#5
Supreme Member
Join Date: Jul 1999
Location: Mims, Florida
Posts: 2,149
Likes: 0
Received 1 Like
on
1 Post
Car: '87 IROCZ
Engine: 395 ZZ4
Transmission: ProBuilt 700R4
Axle/Gears: 9 bolt 3.70s
Re: What size injectors do i need 89 350 IROC?
The factory flow for our 350s is 22 #/hr... These injectors are run at the factory fuel pressure of 43.5 psi. I see above some confusion between flow rate and fuel pressure.
The best replacement for GMs 22 #/hr injectors are the Ford Racing 24 #/hr injectors. Stay away from the Accel injectors, too many horror stories on this board on that injector.
FWIW: I have been running my Ford injectors for 10 years now.
The best replacement for GMs 22 #/hr injectors are the Ford Racing 24 #/hr injectors. Stay away from the Accel injectors, too many horror stories on this board on that injector.
FWIW: I have been running my Ford injectors for 10 years now.
05-27-2007, 01:33 PM
#6
Member
Join Date: Dec 1999
Location: What?!? Am I still here?
Posts: 176
Likes: 0
Received 0 Likes
on
0 Posts
Car: Mullitt mobile :)
Engine: it's stock LOL
Transmission: 700rJunk
Axle/Gears: 2 much 4 street not enough for strip
Re: What size injectors do i need 89 350 IROC?
The factory flow for our 350s is 22 #/hr... These injectors are run at the factory fuel pressure of 43.5 psi. I see above some confusion between flow rate and fuel pressure.
The best replacement for GMs 22 #/hr injectors are the Ford Racing 24 #/hr injectors. Stay away from the Accel injectors, too many horror stories on this board on that injector.
FWIW: I have been running my Ford injectors for 10 years now.
The best replacement for GMs 22 #/hr injectors are the Ford Racing 24 #/hr injectors. Stay away from the Accel injectors, too many horror stories on this board on that injector.
FWIW: I have been running my Ford injectors for 10 years now.
Yeah, you're right, didn't mean to put 'PSI' in front of 22#s
. I am also running Ford 24#s with my 383 at 41 PSI. Sorry about the confusion in the reply. 
Trending Topics
07-22-2007, 02:52 PM
#8
Re: What size injectors do i need 89 350 IROC?
There is no magic number for a fuel pressure regulator, especially with your nitrous. It becomes a matter of trial and error as you find what pressure makes your car run the best without making it run too rich.
Thread
Thread Starter
Forum
Replies
Last Post
toronto formula
Engine/Drivetrain/Suspension Parts for Sale
15
11-10-2015 06:17 AM
NinjaNife
Tech / General Engine
27
08-23-2015 11:49 AM
mustangman65_79
Body
3
08-11-2015 03:17 PM
knight72
Engine/Drivetrain/Suspension Wanted
0
08-10-2015 09:32 PM
