i think I have a bad injector on my 1990 Iroc/Z 305 TPI. Can I put injectors from a 350 on there instead of the 19lb and hour injectors? What would happen if I did? I've got some mods, but nothing major such as heads or porring. Below in my sig is all of my mods. Will doing this yield any power gains? If this doesn't give me any power and if I should stay with the 19lb and hour ones, what is the ohm's resistance reading for the injectors supposed to be? Is it between 16k and 18k?

 

Sure you can run 22lb injectors, but if you dont have a custom chip, and an adjustable fuel pressure regulator, you will run rich all the time. The larger injectors will provide more fuel than your engine can use.

------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

I forgot to include my sig. I do have a chip and AFPR, what would I need to set the pressure at?

------------------
Modifications list on my Iroc:
Engine Specifications and Relevant Information
Displacement: 305 Cubic Inches (5.0 Liter)
Induction: Tuned Port Injection
Rear Axle Ratio: 3.42:1
Transmission: Borg Warner World Class T-5 Manual
G92 Performance Package
N10 Dual Catalytic Converters
Z28 Performance Package
Engine Modifications:
K&N Conical Throttle Body Clamp-on Air Filter
160 Degree Thermostat
Secondary Fan Switch By-Pass
MSD Cap, Coil, 8.5mm Wires, Rotor, and 6A Ignition
Accel HEI Module
JET Adjustable Fuel Pressure Regulator
JET Fan Switch
Quaker State Hi-Performance Oil
Computer Modification:
Ed Wright (Fastchip.com) Stage 2 Performance Chip
Interior Modifications:
Macewen White Gauge Face Overlays
Auto Meter Phantom Oil Pressure Gauge in A-Pillar
Hurst Comp/Plus Shifter
Kenwood CD player and 7x10's Mounted in Rear Cargo Well
Exhaust Modifications:
Gutted Catalytic Converters
3" Intermediate Pipe
Flowmaster Crossflow Muffler
3" Chrome Tail Pipes
Suspension Modifications:
Addco Sway Bar End Links (Polyurethane)
Gabriel Hi-Jacker Air Shocks (Rear)
(Will soon install a Spohn Tubular Panhard Bar)
Exterior Modifications:
5% Window Tint
GTS Taillight Blackouts
Black GTA rims
Best 1/4 Mile Dragstrip Pass To Date:
Solo:14.739 Seconds @ 94.42 MPH
With Passenger:15.009 Seonds @ 93.51 MPH
A Run of 14.5 Is Possible, But I Have to Wait for My Shifter Springs to Arrive (Mine Are Missing for Some Reason). The Run I Know Which Should Have Achieved This Was Against a Mustang Who Ran a 14.865. I Was Ahead By An Entire Car-Length the Entire Run Until My shifter Hit the Gate For Fourth Gear, Causing Me to Miss the Gear and Grab a Very Disappointing 15.810. What Makes This Story Even Worse to Tell, Is The Fact That I Believe I Had My Best Reaction Time On This Run; a .605 Second Reaction.

 

Damn, thats a huge sig, please trim it.

You'd need to run about 40 PSI, and you'll probably still be rich.

 

Thanks Kev, I'll trim the sig too What do you think I should set the pressure at, as is? I'm going to just stay with the 19lb set.

Edited: Thanks Kevin, I just read the post in Camaroz28.com. See ya!

[This message has been edited by 90Iroc (edited December 14, 2000).]

 

If you need a new 19lb injector or two, I'm sure you can find them pretty easily. 19lb injectors are a dime a dozen, because people upgrade to 350's or larger with 22lb injectors, and toss aside their 19lbs. I've still got mine, but my dad is using them for another project. Good luck.

 

Do not install the larger injectors. I ran a set of 22lb on my old 305 while running a mild cam,stock vette heads, exhaust, etc and it still ran horribly rich. 19lb injectors are plenty for a 305. I ended up switching over to a ford 19lb injector and it ran awesome ever since.



------------------
David Tuschhoff
1991 RS Camaro M5
A SuperRammed, TPIS,
Ross, AFR, Scat, Crane,
CompCams induced 355!
My f-body page!