Variable Displacement V-10?
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Mountain Pass
Joined: Sep 2003
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From: Greenfield,In
10-31-2000 Ford Paper re:Variable Diaplacement Engine
This link is interesting reading and addresses compressing air in dead cylinders and solenoid valve operators incorporated in OHV engine relative to VDE. About 1/2 way down the page. www.suv.com/news/2000/fordfuel10.31.00.html
I ran across this artilcle as I investigate Variable Displacement for my 2003 V-10. By the way I have been able to run my V-10 in the "fail-safe coolant" mode without an overheated engine. I may need to "FLASH" the EEPROM to keep the A/C running in this simulated "fail-safe coolant" mode.
I ran across this artilcle as I investigate Variable Displacement for my 2003 V-10. By the way I have been able to run my V-10 in the "fail-safe coolant" mode without an overheated engine. I may need to "FLASH" the EEPROM to keep the A/C running in this simulated "fail-safe coolant" mode.
Last edited by Richard2212; Aug 30, 2005 at 09:22 PM. Reason: added comment to make ref material easier to find.
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Mountain Pass
Joined: Sep 2003
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From: Greenfield,In
No Injector Fault Codes
Originally Posted by captchas
put a scanner on it. bet you have open injector faults
I could not find any Pxxxx Fault codes that pertain to Injectors!
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From: Burnsville, MN
Richard 2212 - Good reference. Unfortunately though I don't think it offers much hope. If Ford only expects an 11% gain on a V10 - presumably after installing solenoid controlled valves - you will probably see substantially less....
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Mountain Pass
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From: Greenfield,In
Progress Report-
"fail-safe cooling" mode - I have operate in this mode by tricking the computer with a
simulated input. It runs,but well enough for me. A number of
computer changes would be required to keep the A/C on,
get in/out without key on/off. I have abandoned this plan.
"Turn off Left Bank" - I have hooked up a switch in the cab to be able to switch
the left bank in and out manually. The engine runs fine,
idles fine and is easy to switch. (Future plans, if every-
thing goes well, with be by a vacuum switch). I have
hooked up an air/fuel ratio gauge that I can switch
between banks. When the left bank is off it shows "lean".
That's what we would expect. Also at that time the right
bank reads fine - same as when both banks are work-
ing. All temps appear normal.
Switching the left bank in and out is almost undetectable
above about 15 MPH.
The next test will be an extended road run over a
two way trip with controlled speeds and 15 in HG
being the in/out point. 10 cylinders below 15 in HG
and 5 cylinders above 15 in HG.
"fail-safe cooling" mode - I have operate in this mode by tricking the computer with a
simulated input. It runs,but well enough for me. A number of
computer changes would be required to keep the A/C on,
get in/out without key on/off. I have abandoned this plan.
"Turn off Left Bank" - I have hooked up a switch in the cab to be able to switch
the left bank in and out manually. The engine runs fine,
idles fine and is easy to switch. (Future plans, if every-
thing goes well, with be by a vacuum switch). I have
hooked up an air/fuel ratio gauge that I can switch
between banks. When the left bank is off it shows "lean".
That's what we would expect. Also at that time the right
bank reads fine - same as when both banks are work-
ing. All temps appear normal.
Switching the left bank in and out is almost undetectable
above about 15 MPH.
The next test will be an extended road run over a
two way trip with controlled speeds and 15 in HG
being the in/out point. 10 cylinders below 15 in HG
and 5 cylinders above 15 in HG.
Thread Starter
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Mountain Pass
Joined: Sep 2003
Posts: 200
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From: Greenfield,In
Final Report on Vari Displ Experiment
Well I did a road test with left bank on(Vacuum below 15 inHG) and the Left bank off (Vacuum above 15 inHG). I travelled the same road in both directions - being that I live in East Tennessee the road was not level but no serious hills - ie: no more than 2.5 degree grade.
I also did a test run on the same road with all 10 cylinders as normal.
I topped off the tank very carefully each time (same station same pump). I drove "grandma" style(both tests) - between 40 and 57 MPH - keeping the vacuum above 10 in HG as well as I could. Did a lot of coasting and easy acceleration. So much for the conditions - now the results.
5 and 10 cylinders 22.1 MPG
10 cylinders 24.6 MPG
Future Plans:
End 5/10 cylinder experiments.
Keep the vacuum gauge and use it to control my right foot.
Look into some EEC-V Programming changes such as:Xcal2
With the cost of Premium still just $.10 per gallon for each step up it may be practical to use a 91+ octane tune to improve performance and MPG's if used conservatively sometimes. We have a Station that sells Top Grade Preminum on friday for the same price as Middle Grade (87 + $.10/gallon) - thats what I use in may Turbo Mustang.
I also did a test run on the same road with all 10 cylinders as normal.
I topped off the tank very carefully each time (same station same pump). I drove "grandma" style(both tests) - between 40 and 57 MPH - keeping the vacuum above 10 in HG as well as I could. Did a lot of coasting and easy acceleration. So much for the conditions - now the results.
5 and 10 cylinders 22.1 MPG
10 cylinders 24.6 MPG
Future Plans:
End 5/10 cylinder experiments.
Keep the vacuum gauge and use it to control my right foot.
Look into some EEC-V Programming changes such as:Xcal2
With the cost of Premium still just $.10 per gallon for each step up it may be practical to use a 91+ octane tune to improve performance and MPG's if used conservatively sometimes. We have a Station that sells Top Grade Preminum on friday for the same price as Middle Grade (87 + $.10/gallon) - thats what I use in may Turbo Mustang.
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From: Burnsville, MN
Really appreciate you posting your results. It was also gutsy to pursue the experiment in the first place.
So what you're saying is that there was a 10% deterioration in the mileage when you judiciously invoked the 5/10 cyl mode over all 10 cyl. Okay, I can see that - wrong conservation path.
On the other hand, there's an ongoing thread active now about a V-10 user in Norway who seems to be getting along with a Canadian made LPG fuel conversion that sounds interesting..... don't know what mpg he's getting, but he mentioned that "gas" costs a third of what "gasoline" costs where he is.....
So what you're saying is that there was a 10% deterioration in the mileage when you judiciously invoked the 5/10 cyl mode over all 10 cyl. Okay, I can see that - wrong conservation path.
On the other hand, there's an ongoing thread active now about a V-10 user in Norway who seems to be getting along with a Canadian made LPG fuel conversion that sounds interesting..... don't know what mpg he's getting, but he mentioned that "gas" costs a third of what "gasoline" costs where he is.....
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From: Long Island USA
Originally Posted by BareBones
don't know what mpg he's getting, but he mentioned that "gas" costs a third of what "gasoline" costs where he is.....
He's paying $8 per gallon of gasoline - that's taxes making it that high, of course. And, maybe delivery costs
I'd like CNG better than LPG - at least I have a ready supply of it going into my house ...
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Mountain Pass
Joined: Sep 2003
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From: Greenfield,In
Originally Posted by krewat
Very interesting results! And, thanks for the followup...
24.6MPG? Is that the travel computer showing that?
I find that hard to believe
24.6MPG? Is that the travel computer showing that?
I find that hard to believe
Good input from all. Thanks.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
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From: Long Island USA
Something basic is wrong with your experiment if you got 24MPG with a V10
Or, maybe, not so wrong...
I have a vacuum gauge on my '01 V10 - very informative. I seem to get much better mileage keeping it above 10" of vacuum - but then all the people behind me are already honking their horns ...
Or, maybe, not so wrong...
I have a vacuum gauge on my '01 V10 - very informative. I seem to get much better mileage keeping it above 10" of vacuum - but then all the people behind me are already honking their horns ...
Thread Starter
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Mountain Pass
Joined: Sep 2003
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From: Greenfield,In
I have a vacuum gauge on my '01 V10 - very informative. I seem to get much better mileage keeping it above 10" of vacuum - but then all the people behind me are already honking their horns ...
My other vehicle is a 1984 ANNY-stick-turbo-2.3L-Mustang-cranked to 15 # of BOOOST.
Thanks for caring man!
"911 took away a lot of my tolerance"
Last edited by Monsta; Sep 14, 2005 at 05:58 PM.
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From: Burnsville, MN
Granted that the 24.6 seems unrealistic in comparison to what we are accustomed to with Super Duties. But I think he's driving a much lighter van..... And in any event, its the percentage improvement that matters. My 350 does NOT get 20 mpg....
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From: Burnsville, MN
By the way Krewat, I was once looking into CNG (Compressed Natural Gas) for use on a boat, and you can purchase compressors that would compress household natural gas into CNG. If we were to have the same 3 to 1 price spread it might make some sense.
In fact, the funny thing about these compressors is that you don't have to provide them with fuel! (Presumably they burn the natural gas)
In fact, the funny thing about these compressors is that you don't have to provide them with fuel! (Presumably they burn the natural gas)