MPFI swap

Topic: MPFI swap (Read 2231 times) previous topic - next topic

MPFI swap

May 11, 2014, 03:04:49 PM

ok, some of have read my others post about wanting to swap my 3.8 into 5.0. well, I tore into the 3.8 today and maybe its not so bad after all. when I went to remove the intake, most of the bolts weren't even finger tight, WHAT THE??? and the exhaust manifolds came off way to easy and didn't even have any gaskets on them. hmmm, someones already been in there, I think so! the engine itself have ready good compression as far as I can tell turning it by hand but a massive oil leak yet to be determined ,timing cover or head. anyways enough babbling, what I want to know is has anyone done a tbi to mpfi swap and whats involved?

MPFI swap

Reply #1 – May 11, 2014, 03:20:19 PM

From what I've seen, fuel lines, sensors and wiring is almost completely different.

coolcats.net has a bit of info in the tech section called implanting a 5.0.

MPFI swap

Reply #2 – May 11, 2014, 05:23:13 PM

^^^ what he said. I posted the link to it in one of your other threads

MPFI swap

Reply #3 – May 11, 2014, 06:18:28 PM

what I was asking , is for the 3.8 not the 5.0 .I was pondering keeping the 3eighter but making it multi port rather than throttle body. I will go back and check out his thread just incase I missed something.

MPFI swap

Reply #4 – May 11, 2014, 09:48:53 PM

To make it look factory, swap everything. litterally everything is eithet in the wrong place or missing in the engine bay. the fuel lines are the wrong size, fuel pump doesn't.have the right pressure, upper and lower intake manifold are different and everything else.

When your done looking for the easy way out and find your big boy pants and have a particulat question rather then being spoon fed, let us know.

MPFI swap

Reply #5 – May 12, 2014, 10:23:33 AM

HAHA, somebody got their panties in a wad!!! 1st off ,if I was looking for an easy way out then I would of never started tearing down my existing engine I would have just hauled it off for s, 2nd this thread and any others I have posted were pretty specific in theirself. big boy pants? I geuss 40x36 is not very small. so because these cars have so many options for cool engine swaps and I haven't put my finger on the exact one I want then you want to talk some s***? thanks for your help.

MPFI swap

Reply #6 – May 12, 2014, 11:22:11 AM

What he is saying is true though... you have to change the entire engine. Literally everything is different. Block, heads, intakes, wiring, cam, lifters... The only thing you might be able to reuse are some of the crank components if they are in decent enough shape, and MAYBE the computer although I'm pretty sure it is different as well. Not to mention, as he also stated, everything is on the opposite side of the car for wiring and accessories. The easiest method by far would be to either rebuild and reuse your existing engine or swap in the 5.0. Even if you completed the MPI swap, you're only going to gain 10 hp....

MPFI swap

Reply #7 – May 12, 2014, 09:07:37 PM

I wasn't trying to be rude, but lets play a game.

Someone tell me how to do everything quick and easy.

or an actual question to be answered. such as, i noticed my engine is a 3.8, the newer mustangs have sefi and more power. Would i need a larger fuel pump or fuel line mods?

One is being spoon fed, the other is asking for help. anyone can look and see its a lot of work reguardless of if you go 3.8 split port or not. personally id just throw a 302 in it since the price and amount of work are virtually identicle. and like was said, the 88 3.8 was only a 10hp upgrade and was basically a one year only deal if you want a quick and easy swap that you can find parts for.

MPFI swap

Reply #8 – May 13, 2014, 12:57:59 AM

did you bother even read my post, the last sentence is a question. I wasn't looking for quick and for sure know its not gonna be easy. I was just looking for some thoughts and insight from some folks that have been there done that. after reading sarjaxx reply I see now that's not even worth it, as he actually answered my question. wasn't trying to be rude? it just comes natural, huh?

MPFI swap

Reply #9 – May 13, 2014, 01:02:30 AM

thanks sarjxxx, you always give me some good info, only 10 hp, its not worth the trouble. I guess I will stick option #1 and #2. rebuild or drop in the 5.0, still kicking it around for now.

MPFI swap

Reply #10 – May 13, 2014, 01:30:44 AM

And i answered it in the first reply to your first post. if you had read what i suggested (and what sarjaxx confirmed), then you would have gotten somewhere.

the sefi swap is pretty much identicle to a 5.0 sefi minus two injectors. Id look at the newer 94+ engines or go 302.

MPFI swap

Reply #11 – May 13, 2014, 01:43:57 AM

302 is weighing heavy in my heart, but if I go with it, im going carbed. from what I gather a 5.0 can still get decent mpg in these cars. that was the only reason I was even considering the multi port or sefi swap, for the mpg, but $$$ and time involved,im certain I will be a lot happier with extra horses instead!:burnout::burnout:

MPFI swap

Reply #12 – May 13, 2014, 12:20:18 PM

Yes mpg is really not that different from 3.8 - 5.0. Some people have actually reported MPG gains from swapping to an HO, most likely due to having the proper amount of power to push the car and the engine not having to work as hard. Now if you go carbed and/or non HO that is probably a different story. However the only real MPG worthy swap would be 2.3T and you will achieve comparable power to an unmodded HO and awesome gas mileage. But, that's even bigger pita than doing the V8 swap.

And you are welcome.

MPFI swap

Reply #13 – May 13, 2014, 01:05:14 PM

seems I have found my swap,302 carbed! I put this same 302 in a 1986 mitubishi mighty max last year, then I took it right back out and sped the truck, it was just too much for that little truck!! lol now that was not an easy swap, had to make my own engine mounts, trans. mounts,had to beat the trans. tunnel out to fit the c6 I had hooked to it, etc. etc.... man I wish had kept that carb. now im gonna have to buy another one.