I have a 1987 E350 21' class C motorhome that I converted to 4x4. Now I want to convert the carberated 460 to EFI. I have many questions. Should I go later EFI or earlier (MAP or MAS)? Go through the harness myself or have one made. Can someone help me with these questions.

Thanks

I would reccomend trying 460ford.com lots of info on this.

I personally would just go with speed density. Mass air is great for some applications, but OEM 460 Mass air parts are getting very hard to find. They were only made for a few years and only in a couple states. The speed density stuff is everywhere.

With that being said, you are either going to have to swap heads or make an intake work. If you go with swapping heads, look for a set of F3TE heads, they came on '93 and late 460's and are a 'fast burn' head design. They provide +15hp/15lb-ft right out of the box over the older E7TE fuelie heads. E7TE heads will work fine also, they're just a little less desirable. Your heads that you have now, D8VE, will not work as the intake ports will not match up with the factory EFI intakes.

If you decide to keep your heads and swap intakes, you will have to find an intake with injector bosses or direct injection nitrous bosses molded in. Then you can have the bosses machined out to match your injectors, and also have it machined for any other sensors based on which style of EFI you go with. You will also need to find a throttle body.

As for the harness and other components, http://www.fordfuelinjection.com has lots of good stuff and some good info on their site.

If you aren't married to the idea of using OEM stuff, there are many aftermarket EFI setups, everything from TBI to MPI, ranging in price from under $800 to $3000+. This would by far be the easiest route to go, and depending on your budget may be the best.

Vertical,

Your input is much appreciated. What year if I decide to transplant a complete motor?

Vertical,

Your input is much appreciated. What year if I decide to transplant a complete motor?

If you decide to swap in a complete motor, anything from '88-97 will work. As I said earlier, '88-92 used E7TE heads and produced 230hp, 395lb-ft. '93-97 used F3TE heads and produced 245hp and 410lb-ft. The Mass air stuff didn't come until the later years, but its up to you if you want to try to find one with that. Personally, I don't feel its worth the hassle, speed density works fine.

Mass air was cali emissions only, 49 state truicks were OBD-1 Speed density to the end. If you can find a later fuellie 460, by all means, do it.
OTOH, a GM TBI setup for a 454 would be pretty easily adapted to your current engine, and would be one of the cheapest setups possible. You have lots of options.

Vertical,

So what your saying a good combo would be is to use F3TE heads (late model fuelies) on my short block with a ealrier speed density (88-92) type fuel injection system. Am I on the right page? How about my cam shaft? Is it the same as later years? Should I change it to match 93/97 or 88/92? RV cam? The original motor has only 60k and runs well just suffers from a poor fuel manager (carberator).

82F100,

I have really like the simplicity of the TBI EFI Chevy engineered and wondered if it would work for California. I'll have to contact Howell tomorrow and find out if they make a TBI conversion for my aplication.


Thanks Guys,

Jodo, you want to find a 93 and newer set up,The heads changed in 93 as Vertical pointed out. The 93 and newer heads work better(MORE HP). The fuel injection did not change until 96-97, and only on some(Cali and a few others). 96-97(CALIF) use a Mass Air Flow sensor and not the speed density sensor. If your going to run a big cam you want the MAF sensor version, the Speed Density set up does'nt handle big cams very well. The MAF version also uses a crank angle sensor and exciter on the front external balancer/spacer behind the harmonic balancer. The MAF system also squential fires the injectors and has 3 o2 sensors. Speed Density only has one.

Hey man, I have a set of rebuilt heads for an EFI 460 if you want them, 200.00 bucks, or I also have an entire truck with the motor trans and T-case and rear axle, its missing the front, you could pick that up for 600.00 if you want, just let me know, I also did this conversion on an older truck so if you need any help you can PM me, good luck man.

you can use a 89-92 mass air mustang computer and harness. wire in the 460 TFI dizzy, add a bigger mass air meter and 24 lb injectors unless your 460 has more power than the stock ones had.

Guys,

It sounds like the speed dencity (93-95) has won my heart. I'm going to call my buddies at the local wrecking yards and put them on the hunt for my (one of many) next project.

I want to say "thanks" to all of you guys for this information, your awesome!

Jodo

I don't mean to sway you away from swapping to EFI(I did it myself, and am happy I did), but what are you hoping to gain with efi on a RV? If its more power/mileage, I think you might be disapointed..

My goal is dependability and running ability at higher altitude. My buddy has a 94 21' ford class c and runs away from me. For the milage thing, my plan is for a gear vender over drive.

just remember the EFI intake will not fit on carbed heads.

My goal is dependability and running ability at higher altitude. My buddy has a 94 21' ford class c and runs away from me. For the milage thing, my plan is for a gear vender over drive.

Did you ever do this? I am looking at the exact same swap. I have an 87 carbed 460 and an 88 EFI donor.

i would use a ford motor sports stand alone harness or a painless harness made for a mass air mustang setup. all the sensors are the same and you can use the mustang injectors,mass air meter and computer. i use the painless harness and its only 4 main wires to run the whole motor. as was stated earlier you wont be able to use a regular efi intake but you can get the edlebrock victor intake and plum it for efi.

i would use a ford motor sports stand alone harness or a painless harness made for a mass air mustang setup. all the sensors are the same and you can use the mustang injectors,mass air meter and computer. i use the painless harness and its only 4 main wires to run the whole motor. as was stated earlier you wont be able to use a regular efi intake but you can get the edlebrock victor intake and plum it for efi.

I have a complete donor 460 EFI, why would I buy more parts.

I did read last night that the carbed pistons are different than the EFI and will cause my compression to be too high.

was talking to the guy who made the thread.