so im in the process of some major body and suspension work on my 89 f-150 2wd. i have been throwing around the idea of keeping the 4.9l as i am a fan of these engines. i want a nice lil street truck out of this 89 and with keeping the 300 will be somthing diffrent around my neck of the woods. i have done quite a bit of research on this only to find the same thing over and over and i know there is more info out there.

i know its been done before but at a high cost. i know the speed density system cant keep up after a certain point in performance mods, but there has been a lot of guys push it anyways. i know the 300's arent fast turning rpm's engines. i was just wondering what you guys thought about this 300 for this application. note; i havent never rode in a hoped up 300 so i really dont know what they'll do. i know i like mine with some minor mods. so what im asking is for a lil more detail in modin these 300's. and what is a reasonable hp\tq to shoot for? keep in mind i would like to stay with efi and i will be doing most of the work and overseeing what i dont do.

my basic engine plan:
0 deck the block.
high performance ignition.
cam.
afpr.
bigger injectors if needed.
custom moding the upper and lower intakes.
major head work.
1mm bigger valves all the way.

i would like to start with this and later maybe add some rockers, a bigger tb, and maybe bore the block .30 with the rotating assembly fully balanced.
or would i be better off with a 351 or a 12v?

all info is greatly appericated!





p.s.
the more i read, the less i really want to build this 300 so plz! share your knowledge with me.

 

If you have read most of what has been posted on this Forum about modified EFI 300s you pretty much have it all...nothing new to be had. Without going to a MegaSquirt or some other such system you are stuck with the limited operating perameters of the stock EFI system.