1999 to 2016 Super Duty 1999 to 2016 Ford F250, F350, F450 and F550 Super Duty with diesel V8 and gas V8 and V10 engines
Sponsored by:
Sponsored by:

5.8 vs 7.5 vs 5.4 vs 6.8. what to settle for?

Thread Tools
 
Search this Thread
 
  #16  
Old 11-20-2009, 11:21 PM
superdutyduck's Avatar
superdutyduck
superdutyduck is offline
Senior User
Join Date: Oct 2008
Posts: 232
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Ace!
5.8 vs 7.5 vs 5.4 vs 6.8. what to settle for?

If you get a 6.8 you're not settling at all.
one the Ace and I agree on!
 
  #17  
Old 11-20-2009, 11:28 PM
Crossfire660R's Avatar
Crossfire660R
Crossfire660R is offline
New User
Thread Starter
Join Date: Nov 2009
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
thanks for all the info so far guys. I noticed the 3v V10 gets brought up a lot, but isnt that '05-current? I cant really afford anything over $10,000
 
  #18  
Old 11-20-2009, 11:32 PM
superdutyduck's Avatar
superdutyduck
superdutyduck is offline
Senior User
Join Date: Oct 2008
Posts: 232
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Crossfire660R
thanks for all the info so far guys. I noticed the 3v V10 gets brought up a lot, but isnt that '05-current? I cant really afford anything over $10,000
if your in the mood to come to utah i've seen a few dealers around that have 00-03 v-10's for around 6500.
 
  #19  
Old 11-21-2009, 12:48 PM
Ace!'s Avatar
Ace!
Ace! is offline
Cargo Master
Join Date: Nov 2004
Location: So Oregon
Posts: 2,751
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by Crossfire660R
thanks for all the info so far guys. I noticed the 3v V10 gets brought up a lot, but isnt that '05-current? I cant really afford anything over $10,000
Yep, it's 2005+.

Yes superdutyduck,
 
  #20  
Old 11-21-2009, 11:47 PM
Pinky Demon's Avatar
Pinky Demon
Pinky Demon is offline
Posting Guru
Join Date: Dec 2007
Posts: 1,361
Likes: 0
Received 0 Likes on 0 Posts
The V10 no doubt, it is simply the most powerful, sophisticated, reliable gas engine in a truck that you can get for the money.
 
  #21  
Old 11-22-2009, 01:38 AM
Capitlj's Avatar
Capitlj
Capitlj is offline
Junior User
Join Date: Oct 2009
Location: Fargo North Dakota
Posts: 95
Likes: 0
Received 0 Likes on 0 Posts
Myself personally, the 5.4 is going to be enough but I mod everything I own and it would me making a bit more power than stock shortly after taking up residence in my driveway. For you the V10 is probably going to fit nice.
A. Because its in the superduty and they are just nicer trucks to have to drive for long hauls.
B. Gas mileage will not be that much different from one engine to the other. Not enough so that a K&N filter or intake, a tune, and better exhaust can't make up for.
 
  #22  
Old 11-22-2009, 09:42 AM
92f150I6's Avatar
92f150I6
92f150I6 is offline
Posting Guru
Join Date: Jan 2003
Location: PA
Posts: 1,719
Likes: 0
Received 1 Like on 1 Post
Originally Posted by kdy72601
and also it's a PIA to do a tune up on a 5.4 have to pull the fuel rail the ford dealership here gets $300 to do a tune up on one. were a 5.8/7.5 $60 bucks in parts and takes a half hour just food for thought general maintenance is much more expensive on the 5.4/6.8. btw most of the company's vehicles are 5.4l f-350 with 4.10's and they are dogs barely get out of their own way couldn't even imagine towing with one
umm, No. Dont have to pull the fuel rails. I do this for a living. I cna tune up a 5.4 or V10 superduty faster than I can a 5.8 or 7.5 L engine. All I have to replace are 8 sparkplugs. dont have to deal with wires or cap And rotor.

As to the power thing, you ar entitled to you opinion, but even the 2Valve 5.4 has more HP then even your 460, wont argue torque with you, but the 5.8 engine is a gutless wonder compared to the 5.4 in stock form. Case in point. raced my friends truck with a 5.8. Now I have a 4X4 superduty with a 5.4, he ahs a 5.8 F150 4X4 short bed. I had 3 people in my truck, beat him by 2 car lengths, i outweigh that truck by an easy 2000 pounds.
 
  #23  
Old 11-22-2009, 10:31 AM
ruddy's Avatar
ruddy
ruddy is offline
Cross-Country
Join Date: Feb 2004
Location: CA, Sierra Foothills
Posts: 97
Received 0 Likes on 0 Posts
Originally Posted by kdy72601
Go 7.5L 460 my '92 averages 12 city 15 highway with 4.10's
I would wet my pants if I got mileage that good in my 460!!

Of course, I have a carb, c6 and 3.73.
 
  #24  
Old 11-22-2009, 11:00 AM
dkf's Avatar
dkf
dkf is offline
Hotshot
Join Date: Mar 2007
Location: Pa
Posts: 10,101
Likes: 0
Received 17 Likes on 17 Posts
I never heard of anyone who got such good mpg with the 5.8l and 7.5l in an F-series. My father had a 5.8l in a SC F-150 for quite a few years and didn't achieve the mpg posted here. Thing I don't like about the 80s and 90's F-series enignes is how corked up they were and all the emissions equipment they had just to pass emissions way back when. My 04' 6.8l only has 1 cat and no egr (hell the 302 in my 74' even has EGR), compare that to the 5.8l and 7.5l in the 90s.

Changing plugs on the modulars isn't too bad at all and like 92f150I6 said no cap/rotor, wires and etc to mess with. Th emodulars just have a short plug boot with a metal spring contact on the inside and one bolt lets the COP and the whole deal slide out.
 
  #25  
Old 11-22-2009, 04:00 PM
kdy72601's Avatar
kdy72601
kdy72601 is offline
Senior User
Join Date: Nov 2006
Posts: 130
Likes: 0
Received 0 Likes on 0 Posts
It aint hard to get that kind of miliage out of A EFI 460, good proformance wires, bosch platium 2 spark plugs, pull the smog pump,and good exaust, and keeping your right foot out of it, bad lead foot bad, my frind did the same thing with a 1989 5.0 bronco and avrages 22 mpg highway didn't belive him untlill i browwed it
 
  #26  
Old 11-22-2009, 04:07 PM
jeffdoerr's Avatar
jeffdoerr
jeffdoerr is offline
Elder User
Join Date: Dec 2002
Location: MI -- farmboy
Posts: 740
Likes: 0
Received 2 Likes on 1 Post
if you are just pulling sleds, a 5.4 truck with 4.10 or 4.3 gears will do fine. So will a ranger with a 4.0

99-03 F250 with a v10 will get about 1 mpg worse than a 5.4 truck, and you will have the ability to pass people when pulling a trailer. Thats the diffrence.

I did not say this, and you did not hear it from this site, but the 2v v10 motors can get excellent mileage when the cats are removed. This is common knowledge around here and quite proven......
 
  #27  
Old 11-23-2009, 08:58 PM
bill11012's Avatar
bill11012
bill11012 is offline
Modular motor junkie
Join Date: May 2009
Location: Texas
Posts: 6,190
Likes: 0
Received 3 Likes on 3 Posts
Originally Posted by Crossfire660R
that helps out. I would love to get an 05 with a V10, but thats way out of my price range. I really like the 351/460's because they are easier to work on. What kind of gas mileage can be expected out of these engines in a ext cab long box 4wd truck? will the 460 or V10 get 10-14mpg?
My v10 gets 10-14mpg.



I love my 460, but the thing has a real drinking problem.
 
  #28  
Old 11-23-2009, 09:18 PM
bill11012's Avatar
bill11012
bill11012 is offline
Modular motor junkie
Join Date: May 2009
Location: Texas
Posts: 6,190
Likes: 0
Received 3 Likes on 3 Posts
Originally Posted by jeffdoerr

I did not say this, and you did not hear it from this site, but the 2v v10 motors can get excellent mileage when the cats are removed. This is common knowledge around here and quite proven......
How much better?
 
  #29  
Old 11-23-2009, 09:38 PM
superdutyduck's Avatar
superdutyduck
superdutyduck is offline
Senior User
Join Date: Oct 2008
Posts: 232
Likes: 0
Received 0 Likes on 0 Posts
my v-10 sees right at 9 mpg but thats in the city and i've changed to a better breathing exhaust and a better air filter, and i cant keep my foot out of it because the exhaust sounds cool as all get out. she's a head turner when fired up and running! by the by it gets close to 20 to 25 mpg on the highway.
 
  #30  
Old 11-23-2009, 11:10 PM
bill11012's Avatar
bill11012
bill11012 is offline
Modular motor junkie
Join Date: May 2009
Location: Texas
Posts: 6,190
Likes: 0
Received 3 Likes on 3 Posts
Originally Posted by superdutyduck
my v-10 sees right at 9 mpg but thats in the city and i've changed to a better breathing exhaust and a better air filter, and i cant keep my foot out of it because the exhaust sounds cool as all get out. she's a head turner when fired up and running! by the by it gets close to 20 to 25 mpg on the highway.
20-25mpg? in US gallons/miles???

My V10s best is 15.8
 


Quick Reply: 5.8 vs 7.5 vs 5.4 vs 6.8. what to settle for?



All times are GMT -5. The time now is 03:00 PM.