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Old 02-02-2008, 09:14 PM   #1 (permalink)
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460 efi conversion

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.

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Old 02-02-2008, 11:17 PM   #2 (permalink)
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I would reccomend trying 460ford.com lots of info on this.
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Old 02-03-2008, 05:44 AM   #3 (permalink)
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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.
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Old 02-03-2008, 07:20 AM   #4 (permalink)
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Vertical,

Your input is much appreciated. What year if I decide to transplant a complete motor?
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Old 02-03-2008, 01:22 PM   #5 (permalink)
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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.
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Old 02-03-2008, 04:02 PM   #6 (permalink)
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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.
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Old 02-03-2008, 08:41 PM   #7 (permalink)
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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,
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Old 02-05-2008, 06:25 PM   #8 (permalink)
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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.
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Old 02-05-2008, 06:28 PM   #9 (permalink)
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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.
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Old 02-05-2008, 07:27 PM   #10 (permalink)
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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.
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Old 02-05-2008, 09:09 PM   #11 (permalink)
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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!

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Old 02-05-2008, 09:53 PM   #12 (permalink)
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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..
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Old 02-07-2008, 01:16 PM   #13 (permalink)
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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.
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Old 02-07-2008, 01:41 PM   #14 (permalink)
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just remember the EFI intake will not fit on carbed heads.
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Old 11-10-2009, 03:04 PM   #15 (permalink)
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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.
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Old 11-11-2009, 06:49 AM   #16 (permalink)
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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.
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Old 11-11-2009, 08:49 AM   #17 (permalink)
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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.
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Old 11-12-2009, 08:47 PM   #18 (permalink)
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was talking to the guy who made the thread.
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Old 10-07-2013, 01:57 PM   #19 (permalink)
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We have done multiple 460 efi conversions actually

I run one in my truck and have helped set up and swap friends trucks over to efi also. We have learned how to eliminate the entire egr system and how to run the computer as a true stand alone. After working with our machinist we found a cam that runs within the parameters of the ecu and also increases horsepower torque and helps improve gas mileage. A few people have shipped their wiring harnesses to us when they couldn't get through them on their own and we have built full set-ups for people also. We even did a conversion in a 1987 jubilee RV.
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Old 10-07-2013, 07:54 PM   #20 (permalink)
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Old 10-07-2013, 08:29 PM   #21 (permalink)
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I run one in my truck and have helped set up and swap friends trucks over to efi also. We have learned how to eliminate the entire egr system and how to run the computer as a true stand alone. After working with our machinist we found a cam that runs within the parameters of the ecu and also increases horsepower torque and helps improve gas mileage. A few people have shipped their wiring harnesses to us when they couldn't get through them on their own and we have built full set-ups for people also. We even did a conversion in a 1987 jubilee RV.
Good thing you showed up 4 years later to offer your services!
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Old 10-07-2013, 10:55 PM   #22 (permalink)
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Just getting started on the forum side of things. I had always wanted to convert mine over for years without seeing any real options that didn't involve extensive tuning and cost. After only seeing a few people do their swaps (some of which gave up) I decided setting these up would be a real asset and a blessing to many. There again I am an absolute supporter of anyone who builds not buys and am always willing to help out in that regard. "4 years later" people are still looking for an efi solution. You looked, must mean your looking too. If in any way I overstepped a general rule on this forum please let me know. Not out to make enemy's but rather help someone who might be looking.
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Old 10-08-2013, 06:07 AM   #23 (permalink)
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The 460 EFI swap is actually pretty easy to do, but ill agree with what you said, not too many people out there doing it from what ive seen either.

And since the thread is bumped to the top, heres what I did.
I put a 89 460 in place of an 88 351, and reused the 351 wiring harness. The only sensor that is different is the TPS, as the 460 sensor plugs into the harness directly and the 302/351 has a pigtail as part of the sensor. But aside from that, everything fits right up. Main reason I mention this is because if you can find the stock EFI heads & intake, you don't NEED a complete 460 harness (just the TPS plug), and then any small block harness will work. Might make it easier to find parts, depending on the area you live in. Over here 460s are dime a dozen in the junkyards.

Yes the emissions is easy to delete as you don't need the TAB, TAB or CANP at all, and the EGR is easily defeated with a delete kit (specifically I used one from rjminjectiontech.com).

There are also different fuel rails for the 460, with the difference being where the fuel lines connect (front left or in back), and the FPR (it changed, I think ~93).
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Old 10-08-2013, 03:06 PM   #24 (permalink)
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I have a low mileage smogger block out of a van that I plan to convert to EFI. I'll use whatever harness I can find in the local yards that is in the best condition, whether it be from a Mustang or truck. I'm going mass air with a remote mounted turbo, either an AL9 mustang computer or the 460 mass air computer, which can still be found brand new, and tuning it with a Moates Quarterhorse. The mustang harness should be a bit easier as it is already set up for mass air, while the truck harness will require the addition of a couple pigtails, which can be purchased from the aftermarket. I was planning on a 5.4 or 6.8 v-10, but just reflashing and tuning the pcm will cost as much or more than I'll have in the entire mass air conversion. The Quarterhorse piggybacks your computer, gives real time readouts, and only cost about $250. IMO, it is hard to beat for the capability it provides.

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Old 10-08-2013, 03:25 PM   #25 (permalink)
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If in any way I overstepped a general rule on this forum please let me know. Not out to make enemy's but rather help someone who might be looking.
It's the whole "we have a found way to do this" tone without actually explaining any tech that makes you sound like you're advertising services.

I have gone through this whole thing myself, and the info is out there if you look hard enough. I get that not too many people have put it up for everyone to see.

So if you have tech to offer, post it up, but if you have services you are trying to sell, or are trying to make money off the forum in any way other than posting your junk in the classifieds, then buy a vendors star, or find another place to do it.
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