Tuning For 24lb Injectors

You generally do not need to tune for 24 lb injectors because they fall within the EEC's ability to compensate.

It will take the EEC a little time with varied driving, to figure it all out though. Battery disconnects will start that process over.

madspeed said:

hold the press. Why do you even have 24 # injectors if you are still using a 55 mm maf???

Click to expand...

Good question. lol

Were it me....

A stock motor with stock induction/inlet tract doesn't require 24 lb injectors. The 19s that came originally in the car will support more power than the rest of engine combo will support so long as there's not forced induction to contend with.

The problem with stuffing 24lb injectors into the combo with OEM meter and throttle body is low speed drive-ability. The minimum pulse for a 24 lb injector releases more fuel than a 19. Without the ability to aspirate more air, you'll consistently run rich.

As mentioned before, this adjustment is usually within the EEC's ability to compensate (the differences between 19s and 24s isn't huge).

Given this set of circumstances, here's what I would do:

If I had a set of 19s laying around, I'd put them in and call it a day. Leave the 24s sitting in a zip lock bag and saturated with a light weight motor oil.

--or--

Spend a little cash and replace the mass air meter and throttle body.

I'm sure that some of these guys can recommend a larger/compatible mass air meter from a different car (with part number).

You might... MIGHT... even get lucky and find the entire top end from a junk yard (Meter, TB, upper and lower intake) from an explorer. While these mods do not provide HUGE gains, they do provide gains and will shift the bottle neck to the heads. More air = more fuel = a better match for your 24 lb injector and provide a better match for 24s while increasing power at the same time.


Someone please chime in if I've missed something or you find a flaw in this plan.

The other thing that comes to mind is that these mods will pave the way for a better flowing set of heads in the future that equate to even more power increases. It would be nice to have some of this ground work done and in great working order when you come across a great deal on a set of used (and larger) heads for your Windsor.