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1 8th June 11:57
thesnoman
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Default 460 vs. V-10 in 26' motorhome?


V10 is a good engine if it is kept cool in a MH. It has higher
compression so in theory it should do a bit better on gas as all Ford
modern 460's have a low CR. LAso the V10 needs to wind up more to make
its power so it will need about one step deeper gearing than a like
powered MH with a 460 in it.

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2 8th June 11:57
thesnoman
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Default 460 vs. V-10 in 26' motorhome?


I disagree, a gas motor can be quite durable IF it is properly fed,
cooled and lubed. Also I question the resale value of a oil burner MH in
future because it is likely the diesel fuel will always be more than gas
and likely by more than a dollar at times. The only thing that saved
diesel prices this winter has been the warmer than normal winter
reducing oil demand for heating. If it had bee a cold winterm you would
still be paying well over $3/gal for the stuff.


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3 8th June 11:57
big al
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Default 460 vs. V-10 in 26' motorhome?


V10 has a longer stroke than a 460. Why would it need to rev higher?

Al
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4 8th June 11:57
thesnoman
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Default 460 vs. V-10 in 26' motorhome?


Less displacement. HP is figured by taking "torque x RPM /5252". To get
higher HP rating with smaller engine that raise the RPM of its torque
curve to yeild a higher HP output from a small dispacement motor at a
higher RPM than a larger one. With turbo charged diesels you are in
effect increasing its effective displacement because you are paking more
air into cylinders (you could do same with a gas engine with correct
fuel) and making engine feel bigger than it is and hence more power
output because more air and fuel is burned with each cycle. It is the
heat energy from these cycles that drives the engine so with a small
engine, you have to have more of them per minute to obtain the same
output as a larger motor when all else is equal.

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5 8th June 12:17
matt mead
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Default 460 vs. V-10 in 26' motorhome?


I don't see any real problems. The V-10 is a decent motor, certainly
equivilant in durability to many of the older 460s. The only problem
I've seen mentioned frequently regarding the V-10 is the popping of
sparkplugs. This is a costly problem to fix and has occurred with
many. That being said though, the number is still very small when
compared to how many engines have actually been built. (This
potential problem was recently fixed when new cylinder heads were
added a year or two back.) As I recall, the early 99 and earlier
V-10s (which were mostly in vans and Class Cs) had other problems,
probably the wrist pin issue you mentioned. These problems surfaced
after several thousands of miles and you could potentially find one of
these in a motorhome that didn't get replaced under warranty.

Matt
99 V-10 Super Duty, Super Cab 4x4
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6 8th June 12:17
thesnoman
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Default 460 vs. V-10 in 26' motorhome?


This popping of spark plugs was caused by improper plug torque causing
them to loosen up in some engines due to differing expantion rates in
the aluminum head and steel plugs. Ford changed the torque spec and the
plug design to "fix" the problem. If you have a older V10 just check the
plug torque every 5k miles or so (or oil change) and see if they have
loosend up any. If they have not after a few checks, do not bother
checking again until they are changed.

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7 8th June 12:17
geoffp
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Default 460 vs. V-10 in 26' motorhome?


==
I have a 21' Motorhome 10,500 #'s It is a an '87. It has 200,000
Kilometres.(124,000 Miles) It uses NO oil between oil changes and gets 12
MPG(Imperial) on the Highway and 10 MPG overall.
Geoff.
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8 8th June 12:17
the other kevin in san diego
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Posts: 1
Default 460 vs. V-10 in 26' motorhome?


The plug-puking is an issue with a lot of Ford engines, not just the
6.8l Triton.. The fix is not new heads, but inserts in the heads to
stop the problem from happening. http://www.timesert.com has a kit to repair
one or all 10 (or 6 or 8 or however many cylinders your engine has)
plug holes permanently. I don't see the logic in replacing a head
with the same flawed design...
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9 8th June 12:18
matt mead
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Default 460 vs. V-10 in 26' motorhome?


My understanding is the new heads introduced (3 valve) a couple of
years back allowed for more thread area for the sparkplugs, decreasing
the likelyhood of the plugs loosening. Is this wrong? (And I'm not
saying these heads can be used to replace those on the earlier
engines/blocks. My understanding was this change was incorporated
during a redesign to bump the HP and torque.)

I agree about using the inserts to make the repair. That will be my
plan if I ever pop one.....

Matt
99 V-10 Super Duty, Super Cab 4x4
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10 8th June 12:18
the other kevin in san diego
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Default 460 vs. V-10 in 26' motorhome?


My local dealer service <ahem> "manager" told me there was a design
change to increase the thread length in the plug holes.. The guy who
did my inserts told me the plug hole was threaded 16mm in my heads
(the "old" design) but the plugs themselves only had like 6mm of
thread on them and different plugs might have lessened the loosening
tendency. This guy is a straght up, no BS kind of guy - been using
him for nearly 20 years - so I doubt this is some sunshine being blown under my skirt.

My guy says he's never had one come back that's he's done the inserts
in. Says they're a pain in the ass to do on the vehicle, but with the
heads on the bench it's a cakewalk.
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