Injectors
I think you're making a mistake by installing 42 pound injectors. A bigger injector DOES NOT mean more power and can actually negatively affect your engine. Without the proper Air/Fuel Ratio you can't make full power, or even worse - you can destroy a perfectly good motor really quick! The first thing to consider is that it's the fuel that makes the power. For every amount of air you can squeeze into the cylinder, you must also have the proper amount of fuel to go with it. Too much fuel and you drown, too little and you start burning things up. It's that fine line that you're after, if only it was that easy.
All too often I see cars with huge fuel systems, for no apparent reason other than to jump on the band wagon. Don't get me wrong. If you're planning ahead that's one thing, and it is better to be too big than to be too small. The sad thing is when people are pushed into theoretical ideas of what they need. While with the proper Regulator or FMU (Fuel Management Unit) you can run a huge Fuel Pump, it is the injector size that is most critical. This is the one piece that should definitely be matched to the motor. For every Mustang running 11's and 12's with 42 lb. injectors, there is another running 10's with 24 or 30 lb. injectors.
Sure a 42 lb. injector will work with the right amount of fuel pressure, and the correct tuning device, but at what cost? Typically, idle quality and mileage are what suffer, as they can be tough to tune correctly. With many combinations a 24 lb. injector will work great by running a higher fuel pressure under load. This will allow your car to run properly, especially when not being pushed hard, which is very critical for a street driven motor. Huge injectors can be great on race only cars, but will be hard to tune around on a daily driver.
You didn't state any modifications to your block so i'm assuming that you have the stock 302 and your 30 pound injectors are PLENTY big for the mustang you have. You've got a decent combo of mods and will be better off with aluminum heads but shy away from bigger injectors unless you want to install an entire upgraded fuel system. Instead, get a Diablo Sport performance programmer or something like it and precision tune your ECU to get the maximum SAFE performance out of your engine.
I think you're making a mistake by installing 42 pound injectors. A bigger injector DOES NOT mean more power and can actually negatively affect your engine. Without the proper Air/Fuel Ratio you can't make full power, or even worse - you can destroy a perfectly good motor really quick! The first thing to consider is that it's the fuel that makes the power. For every amount of air you can squeeze into the cylinder, you must also have the proper amount of fuel to go with it. Too much fuel and you drown, too little and you start burning things up. It's that fine line that you're after, if only it was that easy.
All too often I see cars with huge fuel systems, for no apparent reason other than to jump on the band wagon. Don't get me wrong. If you're planning ahead that's one thing, and it is better to be too big than to be too small. The sad thing is when people are pushed into theoretical ideas of what they need. While with the proper Regulator or FMU (Fuel Management Unit) you can run a huge Fuel Pump, it is the injector size that is most critical. This is the one piece that should definitely be matched to the motor. For every Mustang running 11's and 12's with 42 lb. injectors, there is another running 10's with 24 or 30 lb. injectors.
Sure a 42 lb. injector will work with the right amount of fuel pressure, and the correct tuning device, but at what cost? Typically, idle quality and mileage are what suffer, as they can be tough to tune correctly. With many combinations a 24 lb. injector will work great by running a higher fuel pressure under load. This will allow your car to run properly, especially when not being pushed hard, which is very critical for a street driven motor. Huge injectors can be great on race only cars, but will be hard to tune around on a daily driver.
You didn't state any modifications to your block so i'm assuming that you have the stock 302 and your 30 pound injectors are PLENTY big for the mustang you have. You've got a decent combo of mods and will be better off with aluminum heads but shy away from bigger injectors unless you want to install an entire upgraded fuel system. Instead, get a Diablo Sport performance programmer or something like it and precision tune your ECU to get the maximum SAFE performance out of your engine.
