Changing fuel injectors 5.4 L
12-30-2007, 10:48 AM
#1
Staging Lane
Thread Starter
Join Date: Dec 2007
Location: royal oak, mich
Posts: 82
Changing fuel injectors 5.4 L
Has any one changed injectors from the stock flow to a higher flow rate? From what I gather the stock rate is 19lbs/hr. The extra horsepower I expect to make calculates out to about 26-28lbs/hr for the flow I need. Can I expect any horsepower gain/throttle crispness from just replacing the stockers before the mods start? How about tuning the engine with a tuner?
01-03-2008, 12:10 PM
#3
Staging Lane
Thread Starter
Join Date: Dec 2007
Location: royal oak, mich
Posts: 82
In searching and reading what I was told the stockers should be fine till the power level goes up from mods (heads/cams/etc.). Found a lot of math to calculate sizes. An increase in pressure would be mre help now. I'm gonna get a reprogrammer for an axle change so I'll add a bit of fuel too. obtw no supercharging is in the future. Never have and never will.
02-14-2008, 02:23 PM
#5
Staging Lane
Thread Starter
Join Date: Dec 2007
Location: royal oak, mich
Posts: 82
I've started taking the inlet/exhaust restrictions out and max tuned it on 93 octane. I've done 0-60 times using stock A/F @ W.O.T. then went to 10% richer setting and no diff at all. Am I reaching the stockers limits? I'd like to change to 24's for the better spray pattern at least. obtw the mpg's went up 20% (2.0mpg) with my foot in it.
06-08-2008, 08:21 AM
#6
Staging Lane
Thread Starter
Join Date: Dec 2007
Location: royal oak, mich
Posts: 82
I switched to 21lb. units for the heck of it. I thought I'd try Accel and it has a crisper throttle response than before. Might just be the spray pattern? It was worth it to me for the money spent. I changed the values in the tables to match them also.
