injectors
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Some believe this to be true. You also have to consider if a tune would be necessary to compensate for the change. Theoretically, the O2 sensor should see the richer mixture -- because of the increase in fuel pressure -- and shorten the injector pulse to create the correct amount of gas.
To make a big enough difference, you might have to change the fuel lines to handle more pressure and do a new tune.
You could install a small injector and increase the pressure. This should do the same thing. The result would put a higher "load" on the injectors as they would run closer to max output more often. But that's probably not a problem -- if you don't race.
I suspect they researched this quite a bit before selecting injector size at the factory. After all, fuel effieciency was a major goal and atomization would certainly help.
I'd look for better ways to tinker.
gp
To make a big enough difference, you might have to change the fuel lines to handle more pressure and do a new tune.
You could install a small injector and increase the pressure. This should do the same thing. The result would put a higher "load" on the injectors as they would run closer to max output more often. But that's probably not a problem -- if you don't race.
I suspect they researched this quite a bit before selecting injector size at the factory. After all, fuel effieciency was a major goal and atomization would certainly help.
I'd look for better ways to tinker.
gp
Le Mans Master
Joined: Mar 2004
Posts: 8,700
Likes: 298
From: Ft. Lauderdale Fl
Race Director
Joined: Apr 2000
Posts: 15,344
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From: Texas
If you need more flow, you can increase the fuel pressure. Doing so means you'll need a tune to address open loop running at start-up as well as WOT.
For the time and effort, you're looking in the wrong place assuming your current injectors are functioning correctly and you're not faced with any duty cycle issues due to road racing/LOTS more hp.
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Instructor
Joined: Aug 2007
Posts: 230
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From: Covington GA
Realistically, all you can do about fuel injectors themselves is make sure that (1) they are behaving as designed and (2) they are the right size for your engine if you've modified it so much the stock injectors can't supply enough fuel. Depending on your level of modification, you may have to deal with the computer controlling them to make sure they're staying open the right amount of time to deliver the right amount of fuel.
With 20 year old injectors, there's a reasonable chance they may have enough crud in them to cause trouble. And sometimes larger injectors can be a band-aid to cover up an engine that's not quite in tune.
With 20 year old injectors, there's a reasonable chance they may have enough crud in them to cause trouble. And sometimes larger injectors can be a band-aid to cover up an engine that's not quite in tune.