Hey everyone, Im new to the site. I was wondering when upgrading your fuel injectors is a good idea? I dont see a supercharger any time in the future, but Im planning on x-pipes, headers, various intake bolt-ons ect... And what is the stock injector rating for the 00-04 4.6L?
need for aftermarket fuel injectors?
- Thread starter snake109
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Mr GT 02
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I also wonder if AFTERMARKET injectors are worth it, when u have bolt on mods equipped...
I was at the track one day and someone mentioned that I should get some injectors....I never asked him why I should tho....
Is there any increase of power or suttin with aftermarket injectors????? If I did get injectors ...could u get a bigger size??? 24lbs???? or is that only nessesary with blown stangs?????
WTF is up??
I was at the track one day and someone mentioned that I should get some injectors....I never asked him why I should tho....
Is there any increase of power or suttin with aftermarket injectors????? If I did get injectors ...could u get a bigger size??? 24lbs???? or is that only nessesary with blown stangs?????
WTF is up??
I found a formula for determining the required injector rating:
("Estimated HP" x "BSFC*") / ("# of injectors x .8) = "Injector flow rate"
* a typical BSFC is .4 to .6, .5 is a good number to start if you dont know.
I dont know if the HP is flywheel output or rear wheel output. Im guessing flywheel output, so Im estimating 280HP to be safe, after pluging the numbers I get a 21.xxx required rating. That seems a little high. So mabey its rear wheel power!? Either way it still seems high. Plus, what about the need for aftermarket fuel rails, pumps, ect.? I hear from some sources that serious damage could occur if the fuel demands arnt meet.
("Estimated HP" x "BSFC*") / ("# of injectors x .8) = "Injector flow rate"
* a typical BSFC is .4 to .6, .5 is a good number to start if you dont know.
I dont know if the HP is flywheel output or rear wheel output. Im guessing flywheel output, so Im estimating 280HP to be safe, after pluging the numbers I get a 21.xxx required rating. That seems a little high. So mabey its rear wheel power!? Either way it still seems high. Plus, what about the need for aftermarket fuel rails, pumps, ect.? I hear from some sources that serious damage could occur if the fuel demands arnt meet.
For the majority of bolt-ons, stock 19# plugs are fine. I was up to 270 RWHP w/ my 19's and the car did not lean out on the dyno during three WOT pulls.
That being said, with a good tune you can swap injectors anytime you feel like you're pushing your luck. I swapped to 30's anticipating cams and P & P heads with no driveability issues.
There is nothing to be gained from injectors except the ability to meet the fuel demands of more horsepower.
When you're making enough power to require an injector upgrade, it's a good idea to start looking at the fuel supply to the injectors. In a typical returnless system, the stock rails are adequate. The fuel pump is another matter. The most common upgrades seem to be the Aviator pump, the Focus pump or the '03 Cobra dual pump/tank upgrade.
I'm not an expert, but I have experimented with my own set-up quite a bit.
Jay
That being said, with a good tune you can swap injectors anytime you feel like you're pushing your luck. I swapped to 30's anticipating cams and P & P heads with no driveability issues.
There is nothing to be gained from injectors except the ability to meet the fuel demands of more horsepower.
When you're making enough power to require an injector upgrade, it's a good idea to start looking at the fuel supply to the injectors. In a typical returnless system, the stock rails are adequate. The fuel pump is another matter. The most common upgrades seem to be the Aviator pump, the Focus pump or the '03 Cobra dual pump/tank upgrade.
I'm not an expert, but I have experimented with my own set-up quite a bit.
Jay
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