Fuel Injection 5.0/5.0HO confusion

[HoleshotKFX400]

Alright, as of right now my truck is has a carb'd 302, 1966 block non roller motor in it. I just bought a 1988 thunderbird 5.0 non HO (thought it was) for $500. All i bought the thunderbird for was the fuel injection, because i want to turbo my truck and want the tuneablity. Now If im right, the tbirds fuel injection should bolt right up and work fine with my truck, but you cant get all those fancy computers for the non-ho(right?). So my question is will a 5.0HO(like a fox body mustang computer) work with this set-up or will it screw with my firing order. and if it does mess with my firing order, can I just switch the injector wire's & spark plug wires ( so that it would fire as it was a ho but i would have the injectors and wires switched up so it would actually fire in the non-ho order) I can clear this up if i wasnt clear enough... hard to explain

 

[AllanD]

The HO uses a different firing order because of it's different cam.

the HO has a different UPPER intake (the Non-HO has about half the
plenum volume) but the same lower intake.

The HO had different cylinder heads, amusingly they are the E7T heads
that were used on the EFI truck engines.

Also distinct to the HO were the shorty tube headers and ALUMINUM
valve covers.

The HO also came with Forged pistons up to 1992.

The HO engines were only installed in Mustangs and Lincoln Mk7-LSC's
And as a note not all Mk7's were LSC models.

My personal preference on an HO engine for a ranger would be an '87-88 Mustang engine.

These were the "speed density" HO engines and differed from the '89-92 only by the absence of a Mass Air Meter. the Mass air system engine's made no additional power (both were rated at 225hp) but I've always felt that a part you leave off can't break.

All things considered what you gain by NOT having an HO engine is you may only get 190hp instead of 225hp, but you get both your power and torque at lower rpms.

The HO is a "spinny" little bitch.

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[baddad457]

You'd just need to reroute the injector wires to match the non HO firing order. Or swap the cam to a 351W cam.

 

[HoleshotKFX400]

I read into it more online, you cant reroute the fuel injectors because the fuel injection senses it from the 02 sensors and sends rich/lean symptoms to the computer, http://fordfuelinjection.com/?p=92 ... so im just going to reprogram my computer... you guys think i should leave it speed density for boost application?

 

[baddad457]

I've heard of guys rewiring the injector harness all the time and it works. There's been some here and over on the RPS forum have done this.

 

[bobbywalter]

you dont want the bird setup its 150 hp and will need alot of tuning and readjusting comparativly...



you want a maf setup for an ho to tune it yourself.


you would also want an explorer intake upper and lower. and a big maf and tb setup.


while its fallen out of favor the old tweecer setups work well for beginning this process.

though with turbo setups the fass systems is really tits.

 

[scooter]

I've heard of guys rewiring the injector harness all the time and it works. There's been some here and over on the RPS forum have done this.

I just converted my non H.O. to MAF today, to begin my Paxton install. I rewired the Injector fireing order, AND IT DID NOT WORK. Ran like crap, wouldnt idle for sh$t.......
I had to put it back to the non H.O. order, runs like a top.
It makes no sence to me, but whatever.

 

[baddad457]

If you have a non ho, then it's got to be wired as such. Wire it to the ho order with a non ho cam and it WILL run like crap.

 

[scooter]

The MAf conversion kit I bought said:
"Note #3: If installing this harness on a NON HO engine, swap pins 13 - 42 and 14 -12 in the computer connector to maintain correct injector firing order." Quote from Interactive Systems & Technologies, LLC.

That is exactly how it is said in my instructions, but i guess they are wrong.

I knew it was missing on at least one cylinder prolly more. The only thing I had done was changed the injecter order, so I just put it back to non ho, and it worked.

 

[blue83ranger]

i don't know if this will help or not, but my brother had a '93 bronco (obviously non ho motor) and it had a knock, so he replaced it with one from a Lincoln (ho motor) and it ran crappy for a while (minutes) and the engine light came on but after a few minutes the computer figured things out (I'm guessing) then the engine light went out and it ran perfectly fine. and I witnessed it so it's not just some crap my brother told me. And he drove the bronco for a few years with no problems.

 

[bobbywalter]

his 93 was basically the same engine anyway, save for cam profile. still could have been same f.o. though and possibly even the same cam altogether.





his truck was also most likely sd/mpi...and not sefi. BIIIIIG DIFFERENCE.

 

[HoleshotKFX400]

Alright well I guess im going to use the bird for the wiring only then... Im going to buy a upper and lower HO intake... probably aftermarket... switch the computer to an HO computer... and switch mine from speed density to MAF... and change my cam in my truck to a 351w cam.... Is the 351w cam a direct bolt in for a non-roller 302? Andddd after i do all that i can work on the twin turbo aspect.

 

[baddad457]

A late 93 could have had a 94 model year F4TE roller cam in it. In which case it would use the H.O. / 351W firing order.

 

[bobbywalter]

call the cam guy and tell them exactly what you want to do, they may even have a setup combo of parts lists you can scrounge even cheaper.