with the following mods listed below, do i need a larger fuel pump or fuel injectors. If i need more fuel can i just get a larger fuel pump and keep the same injectors?
Hi,
I would get a larger fuel pump and an adjustable regulator, more for the future though. You should be fine. If your worried get the fuel ratio checked on a dyno... I think you are fine though.
With out that bigger incectors and fuel pump do nothing the stock FPR will only allow what it's set for. When buying bigger injectors you have to up grade the mass air to match those injectors as well.
It is a way to cheat a little on whatever size inj's are in use at the time.
A thought or two
Well, for me the easy way to think about fuel system upgrades is think about the airflow through the motor. If you are moving more air you gotta have the fuel to go with it.
There is some growing room on a stocker using the 19's. The most restrictive part in the airflow path is gonna be key to if you need to go to larger inj's.
You could have all the bolt on stuff on either side of stock E7's and still not need the fuel that the same combo would need that was using some good flowing heads cause the E7 head combo was not moving as much air.
I've got a question sort of regarding this too. I put some 24lbers in over the summer along with a Pro-M maf to go with them cause they were pretty much free, and thought what the hell, couldn't hurt. I also have a 190 lph fuel pump which I only put in there if I ever did upgrade my car when the stock one went bad. From everything I've read, my fuel pressure should be the same, and it is (have a fuel pressure guage on there), but it seems to run really rich. Does the upgraded fuel system have to do with this, and if so, would an adjustable fuel pressure regulator lean the fuel out or what? Kind of a hijack, but it might help some other guys out on this thread.