Thread: Engine Swap - '92 5.0EFI/AOD into '66 Ford F100....

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Originally Posted by 34_40

Good to hear your making progress. Pipes came out nice and the tips "make it" a finished job.

Still like the 5.0? Does your carbon can have a vent on it?

Thanks, Mike! Yeah, I'm lovin' the 5.0 so far. My speedo is off about 10mph. My tires are a little tall (31") for the AOD trans so at 70mph I'm only running 1800rpm, which means at 55, it's only running about 1500rpm. It kinda lugs a little at 55. Whenever I can get around to lowering the truck a little I'll change tire size and correct some of that.

Regarding the charcoal canister, I have a line from the tank connected and the other line the usually goes thru the purge solenoid to the intake just has a roll-over vent stuck in it that came with my tank. Combining Roger's ideas with those of a fella on my Ford truck forum, I think I can use the vacuum purge control valve but need to get a vaccum delay valve and possilby a vacuum check valve so there isn't a continual vacuum drawn on the canister. Bigger fish to fry and the moment but will let you know what I figure out....

Glad its all coming together Randy....Pics look good..!

Have you driven it enough yet to get a feel for what the mpg might be Randy? I've got an AOD going in my '71, just wondering what the 302 EFI does?

Originally Posted by Dave Severson

Have you driven it enough yet to get a feel for what the mpg might be Randy? I've got an AOD going in my '71, just wondering what the 302 EFI does?

Hey Dave, sorry I missed this post. I have put about 500 miles on the truck since the swap but don't yet have an accurate reading on the mpgs. It's been mostly city driving, the speedo is off 10mph and I still have to drop the tank again to sort out the sending unit issues. I've been keeping the fuel level on the low side in case I have a window of time for dropping the tank. It's no fun to drop it but it's even less fun when full.....

Will let you know as soon as I know....but I'm sure the true benefits of the AOD won't be revealed until I take a little road trip.

I dropped the fuel tank again today and finally found the source of my inaccurate gas gauge. The connector on the ground wire that bolts to the sending unit was not squeezed tight enough to make a good enough ground. What a PITA!! But I'm glad I found it. After a trip to the gas station, the gauge now shows FULL!! Yay!! We'll see how long it lasts.......

Originally Posted by randyr

The connector on the ground wire that bolts to the sending unit was not squeezed tight enough to make a good enough ground. What a PITA!! We'll see how long it lasts.......

(in your best Maxwell Smart voice) AHhhhhh.. the old loose crimped connector trick...

In your CA weather.. it should last...... forever!

Loose grounds are the WORST! Problem is they're going to show continuity on a meter, but you can't easily tell that there's resistance there and it doesn't take much to mess up an instrument feed. Glad you found it and got it fixed!!

Originally Posted by rspears

Loose grounds are the WORST! Problem is they're going to show continuity on a meter, but you can't easily tell that there's resistance there and it doesn't take much to mess up an instrument feed. Glad you found it and got it fixed!!

True, loose grounds are pretty bad but maybe not as bad as worms in your paint....

I wired both the fuel pump & sending unit through a 4 pin connector back at the tank so it would be easier to disconnect for tank removal. During this process I also figured out my multi-meter tester had gone bad. It's hard to diagnose a problem with a defective tool! Once I figured out the sending unit actually works, I had to look more closely at all the connectors. The flaw was subtle but seemed to be the only weak link.

Funny how it doesn't matter how many "do-overs" are required to fix something, it's still kinda rewarding to turn on the key and see it work!!

So where are the completed pics at man? We should be starting on my Mom's 68 Mustang shortly. I'll post a thread here on it. I may be picking your brain since you are driving yours now. Well maybe I guess.

Originally Posted by 40FordDeluxe

So where are the completed pics at man? We should be starting on my Mom's 68 Mustang shortly. I'll post a thread here on it. I may be picking your brain since you are driving yours now. Well maybe I guess.

LOL! Sorry, Ryan, I didn't post any more pics cause the looks under the hood haven't changed since post #106. I've put a little over 1200 miles on it so far and love it! The last 2 tanks I've averaged 16mpg with combined city/highway driving. Hoping to move on up to 20 or so on a road trip.

Don't remember if I posted this already but I finished running the pipes out the back. JBA shorty headers with 2.5" exhaust with 50 series Flowmasters. Sounds pretty nice.


I recently went to the annual F100 Western Nationals. Here's a couple of pics of the truck at the show...




Yes, I'm happy to try to answer your questions and share what I learned. Just give me a shout anytime!

MPG has to be one heck of an improvement, Randy!!!! All the frustration of a swap gets forgotten when the results are so good!!

Originally Posted by Dave Severson

MPG has to be one heck of an improvement, Randy!!!! All the frustration of a swap gets forgotten when the results are so good!!

Yeah, Dave, so far it looks like I've doubled my mpgs over the 352. Plus, I've sold the old engine, trans, headers, exhaust and nearly covered my initial outlay for the new engine/trans!

It looks very nice Randy! How much gain do you think you actually see from the Explorer type intake? I'm thinking about getting one fot this stang, but not real sure it is a needed piece.

Originally Posted by 40FordDeluxe

It looks very nice Randy! How much gain do you think you actually see from the Explorer type intake? I'm thinking about getting one fot this stang, but not real sure it is a needed piece.

Everything I read boasted a 15-25hp increase with the Explorer intake because its flow numbers are about the same as the Mustang Cobra GT40 intake. To maximize the performance gains it would probably be more helpful to pair it with the GT40 or GT40P heads but I didn't have time or money for all that at the moment. The '92 5.0HO is rated a 225hp with stock intake & exhaust. It's anybody's guess as to how much I've increased it with the JBA headers & Explorer intake. It seems to have plenty of power for how I use it....

Thanks for the info. Right now funds will determine her engine. I have a different cam, Headman headers, bigger injectors, Ported heads with the correct springs for the cam, and map conversion parts. If the funds are there we will be rebuilding the 302 that we have. It was removed from a 90 or 91 Grand Marquis. I think I'll get the explorer intake as that is a cheap increase compared to an after market one. I got these parts from a buddy who raced his 5.0 but then went to a 331 stroker and carb. He gave me a new fuel pump in our trading too. But now I have to figure out how to put it in the stock tank.