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which engine to use?

  • 1976 460 with D3VE heads

    Votes: 29 67.4%
  • 2000 Superduty 5.4 Triton

    Votes: 14 32.6%
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Discussion Starter · #1 ·
between a 1976 460 with D3VE heads, and a 5.4 Triton from a 2000 F250 superduty...going into a 78 F250, ext cab long box, 4wd...truck will be for street use, mostly used for towing a single place car hauler, general work duties, etc...will rarely go off-road, and that would be just to get to where it needs to work...I also want it to be someting that is smooth and reliable going down the highway, as it will see some longer trips...

either way, it will have some sort of stand alone engine management system, with a brainless auto (probably o/d), and probably just the 205 case...axles will stay the same, but may be regeared depending on engine/trans used...

my thoughts are the 5.4 will be underpowered in a truck that weighs more then the one it was originally in, but the 460 wont be as smooth, or have as long of a life expectancy...

I have both of those engines, so its one of those two...please dont suggest anything else...
 

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Discussion Starter · #3 ·
honestly, I havent looked up the weights of the trucks, and I just assumed the 1978 ext cab truck would weigh a considerable amount more then the 2000...
 

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Yeah, I don't think it would be a bad idea to separate the pros and cons of each and then go from there. The 5.4 is newer, and probably more reliable, but the 460 will probably put up better numbers and be easier to tune. Is the 460 going to be injected or carb'd?
 

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Todd
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i would put a 460 in over a 5.4... the 5.4's in the f150's are way under powered as it is. all those motors do is rev high in rpms and are sluggish. i have one in a reg. cab long bed f150 and it is about worthless, i have never been satisfied with any of them that i have drove. even my buddies super duty with a v10 was pretty sad he was not happy with the truck at all. just my opinion
 

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Discussion Starter · #6 ·
huh...from a quick search, the 78 250 has a GVWR of 8400, and the 2000 is rated at 8800...granted, thats not the weight of the truck itself (which I still dont know) but its a good indicator...
 

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Discussion Starter · #7 · (Edited)
EFI, definately...I hate carbs...


granted, I have also felt that stock trucks with the 5.4 always feel underpowered, but I will also be using a stand alone system to run the engine, either way, so I can do alot of tuning that could seriously help that problem...


I'm leaning towards the 5.4, because I believe it would have a longer life expectancy, possibly better fuel milage, and run a bit smoother...I'm thinking with the stand alone system, I can tune it for economy when not working, and power when it is, but that applies to both choices here...


also, whichever egine does not go in this truck, I wil be putting in a 99 Ranger, which will just be a toy/ street legal/ mild wheeling truck...
 

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Todd
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with them both being efi the will both run fairly smooth, the tritions have alota motor noise just cause the rev so high, and the tritions always seem like they are working really hard even empty, they are expensive motors to fix, especially when they blow the spark plugs out of the intake/head its very common thing now with them. but with it you would have more engine bay room.
 

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Discussion Starter · #10 ·
the 460 is actually narrower..I havent measured them, but sitting next togethor it is obvious...enough that it would take alot of work to make it fit in a Ranger...


oh, and the 78 F250 is the Explorer, not that it really matters...
 

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hoo dat. wat.
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I wouldn't be surprised if the Stuper-duty outweighed the 78 by 500 lb.
 

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Discussion Starter · #13 ·
found the curb weight of the Superduty at 5,194 lbs (if someone has one, can you please verify that?)...I'll check the 78 tomorrow...
 

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I voted 5.4, with correct gearing should be slightly better on fuel. If it has been taken care of those motors are fairly bulletproof.
 

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Discussion Starter · #16 ·
Holley commander 950 efi

uh....no....heard nothing but horror stories from those systems, and they are WAY overpriced...

the 5.4 will have a much longer life expectancy, thats not even a question...back in the 70's, 100k was about the end of most engines, but these days, engines often go 250k-300k, due to better production standards, better designs, tighter tolerances, better materials, etc....

my shop's truck is another Superduty with the 5.4, is ran hard and treated poorly (it is a shop truck) and it has about 340k on the clock, low to no compression on 2 cyls now, and the only complaint from that is a miss...still runs fine, and cruising empty or lightly loaded, you cant even tell there are 2 dead cyls...


5.4's are known to blow spark plugs out...460's are known to break exhaust manifold bolts...I'd rather deal with the broken bolts then the stripped out plug holes, and I believe the 460 would have more towing power, but I know the 5.4 will outlast the 460 probably 2:1 or better...I just dont know if the 5.4 will have enough power...

I wish there was someone around who had a 5.4 running on a stand alone engine management system, like the Megasquirt or SDS...that would be the best way to find out how much power that engine is really capable of, in otherwise stock form...
 

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i would go with the 460. The reasons they didnt last long in the 70's was the lack of overdrive and poor lubrication from conventional oils. Parts are cheaper to fix a 460, numbers will be better hp and ft-lbs, and it will pull anything you hook the truck to. I'd be willing to bet an efi 460 won't be much worse on mpg than the 5.4l. Plus you always overbuild, its the coolness factor.:beerbang:
 
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