EFI injector/MAF questions

[jcb9089]

I purchased an EFI project and I'm trying to put the pieces together the correct way. Need some guidance from the experts on what I need/don't need to make this work.

Rebuilt 351
Edelbrock upper and lower intakes
RJM EFI harness
A9P Computer
24 lb injectors
86 cougar 5.0 Throttle Body


From reading around on the site, I see conflicting reports on what injector size to run.

The PO bought a new set of 24 lb injectors but should I buy the 19lb injectors instead of messing around with a MAF sensor?

I want to make everything work with the best according to the computer, throttle body, and MAF. Suggestions?

 

[ilovemaui]

If the maf is calibrated for 24 lb injectors it would probably be okay.

 

[jcb9089]

Maf

Not sure if the MAF is calibrated to 24lbs. PN = F1ZF-12B579-AA

 

[ilovemaui]

Unless you're planning engine upgrades to the motor 19lb injectors will be fine. I would stick with at the ecu is programmed for. I'm currently running 19's on my highly modified stroker and it runs great. However, I am bumping up to a 105 mm maf and 42 lb injectors. That mod requires tuning the ecu.

 

[rjrobin2002]

I would get 19 lb injectors, Explorer TB, and a 94-94 mustang v6 or v8 maf or 92-94 4.6l crown vic/grand marquis MAF. It runs great on my 2 efi projects with a A9P and flow better than stock mustang TB /MAF to help your 351 breath.

70mm MAF sensor is found on 94-95 v6/v8 stangs; 92-94 4.6L Crown Vic's; Grand Marquis' and Town Car's as well.

 

[TwoDalesDad]

24Lb injectors are abit big....there s no way a 351 can use that much fuel...unless you plan to drag race it...

 

[jcb9089]

What year explorer Throttle Body am I looking for?

 

[rjrobin2002]

96-98 5.0 explorer, get the throttle body and injectors. These are easy to find at junkyards along with the Crown Vic MAF.

 

[ilovemaui]

96-98 5.0 explorer, get the throttle body and injectors. These are easy to find at junkyards along with the Crown Vic MAF.

You may as well get the MAF too and have a matching set.

 

[jcb9089]

Thanks guys, great information!

 

[rjrobin2002]

You may as well get the MAF too and have a matching set.

Nope, dont get the Explorer MAF as it is wrong for the A9P, get the mustang/crown vic maf listed above.

 

[Viperwolf1]

What year explorer Throttle Body am I looking for?

The '96 explorer TB will give you better hood clearance than the later years. You will probably need a 2" body lift as it is.