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Old 05-18-2021, 01:18 PM   #1
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7.5L V8 (gas) Tuning??

Curious if anyone here has any experience or recommendations on performance tuning a Ford 7.5l V8? It was recommended to me by a CO Camper Van employee that I check out 5-Star Tunes but it appears they do not make a tune for the 7.5L (460). But some interweb searching turned up Magnum Tuning and this product. https://www.magnumtuning.com/en/deta...fuel-injection. Curious if anyone has employed this on their engine, if I should even consider it, and what risks or benefits might come from it. My SMB is a, I believe, a 3.55 gear and while I understand that to provide a slight benefit in mpg, I feel like it dogs a bit on the up hills (both highway speeds, and steep forest roads). Maybe that is the price I pay for a beats but if there is a tune that could eeek out a bit more I would consider as long as it's not going to reduce the engine lifespan or swallow more fuel or anything like that.
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Old 05-18-2021, 01:39 PM   #2
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Better breathing and a higher voltage ignition coil (with corresponding better plug wires) is about all you can do. Tuning won’t do a thing on the 7.5L. It’s got a very basic EFI system and it’s just not a very efficient engine.
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Old 05-18-2021, 01:49 PM   #3
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There is no tune for that van. The magnaflow exhaust helped. The K&N panel filter didn't do much. It has an upgraded ignition coil. Put the Ford Racing spark plug wires on I gave you when you do the plugs.

The best way to find the sweet spot for uphill power is to downshift manually and turn off overdrive.

Now imagine how much you would hate life with a 5.4 on our roads.
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Old 05-18-2021, 02:11 PM   #4
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Quote:
Originally Posted by carringb View Post
Better breathing and a higher voltage ignition coil (with corresponding better plug wires) is about all you can do. Tuning won’t do a thing on the 7.3L. It’s got a very basic EFI system and it’s just not a very efficient engine.
Thanks for the reply,
just confirming..... Mine is a 7.5l Gas, not a "7.3L" D. was that a mis type on your part? I have read the same on this engine elsewhere. but MagnumTunes says differently.
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Old 05-18-2021, 02:16 PM   #5
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Quote:
Originally Posted by simplesez View Post
There is no tune for that van. The magnaflow exhaust helped. The K&N panel filter didn't do much. It has an upgraded ignition coil. Put the Ford Racing spark plug wires on I gave you when you do the plugs.

The best way to find the sweet spot for uphill power is to downshift manually and turn off overdrive.

Now imagine how much you would hate life with a 5.4 on our roads.
Thanks for the reply Simplesez,
yes, down shifting and turning off overdrive (which I think is disabled when down shifting anyway). Its not unbearable by any means but I thought if it was tunable why not. But I see that it's not.
Will put new wires on when time comes. Not sure its worth it if the plugs are still working good. But maybe. (FWIW, the gas guzzling is not as bad as I expected...or should I say not as inconvenient as expected give the huge tank volume.)
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Old 05-18-2021, 04:34 PM   #6
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Originally Posted by Clarkboulder View Post
Thanks for the reply,
just confirming..... Mine is a 7.5l Gas, not a "7.3L" D. was that a mis type on your part? I have read the same on this engine elsewhere. but MagnumTunes says differently.
Yup I meant 7.5L

Magnum might sell a ďtuneĒ but the PCM on that PCM isnít really tunable because itís pretty basic. And you cannot modify it through OBD-2. You have to rewrite it by connecting directly to the PCM with a ribbon cable using Ford IDS and an old windows terminal. Banks used to sell a chip but not anymore since thereís not demand anymore. And even chip didnít do much. Mostly adjusted the threshold when the timing would be retarded.

Also, call me a skeptic, but after looking at their site Iím not sure any of their products do anything. Plenty of snake oil for sale though.
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Old 05-19-2021, 12:59 PM   #7
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I can attest to pretty much everything CarringB is saying, from experience. You wonít get much more out of the 7.5 unless you go backwards in technology. Go to 460ford.com and youíll see what I mean. Itís an old school engine and only old school upgrades will do anything. Carburetors, headers, mullets, Def Leppard T-shirts.

You can make one powerful but not efficient, quiet or desirable as a daily driver or freeway cruiser.
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