Results 1 to 18 of 18

Thread: MPG AMC 360

  1. #1

    Default MPG AMC 360

    Thought I would share what my Jeep gets for MPG.I checked today after filling up and I got 18 MPG

    AMC 360 Edlebrock 650CFM M20 2:73's t-18 4spd 33's tires. Not good for trail but great for a DD.

    ED
    ========================================
    1982/1983 Cj-7 360/T-18 33"'s

  2. #2
    Registered gedwards's Avatar
    Join Date
    Nov 2002
    Location
    Columbia Missouri
    Posts
    596

    Default

    Quote Originally Posted by soniccj7
    Thought I would share what my Jeep gets for MPG.I checked today after filling up and I got 18 MPG

    AMC 360 Edlebrock 650CFM M20 2:73's t-18 4spd 33's tires. Not good for trail but great for a DD.

    ED
    WOW!

    I am running an AMC 360 with and Edelbrock 600CFM carb, a four speed, and 2.73 gears, and I was only getting 10mpg. Of course, that was running around in town and before I added the MSD ignition. I haven't checked it since I upgraded the ignition, so it could be alot better.

    1982 CJ5 with stuff.

  3. #3

    Default

    I also have the following Double rolling timing chain set, Performer Cam and intake, electric Fan, dual exhaust and headers. I take all back roads to and from work with my Rpm not going any higher than 1,300RPM. Round trip for me is 80Miles.
    ========================================
    1982/1983 Cj-7 360/T-18 33"'s

  4. #4
    Registered gedwards's Avatar
    Join Date
    Nov 2002
    Location
    Columbia Missouri
    Posts
    596

    Default

    Quote Originally Posted by soniccj7
    I also have the following Double rolling timing chain set, Performer Cam and intake, electric Fan, dual exhaust and headers. I take all back roads to and from work with my Rpm not going any higher than 1,300RPM. Round trip for me is 80Miles.
    My poor milleage is likely from only driving around town with constant varying RPM's. I don't drive it to work, so I rarely drive it on the blacktops or highways, I just run errands in it. One of these days, I'll regear it and start driving it to the trails.

    EDIT: Oh yeah, I'm also running dual exhaust with manifolds, a summit 8601 cam, and a HD 7 blade fan and shroud.

    1982 CJ5 with stuff.

  5. #5
    Registered cj7jeepguy's Avatar
    Join Date
    Apr 2004
    Location
    Hanover, Pa
    Posts
    928

    Default

    I was getting 9 1/2 MPG with a Holley 600. Most of my driving is back roads and in town stuff. I actually get the same when I run up the highway to Paragon or Rausch Creek. I went to EFI and it went up to 12. I was hoping for better but when I figure all the factors its really not all that bad.
    Dont get so excited dear ... I have the Cj just about where i want it ... except for the 4 to 1 ... and the 40's on beadlocks ... and the roll cage ...


    My RigRater Score: 792RRv1.0 with a BOA of 28.54

  6. #6
    Registered
    Join Date
    Aug 2004
    Location
    denver co
    Posts
    508

    Default

    sonic, & others with 33's and 2.73 gears

    i am going to have a similar setup once my jeep is back on the road.. how do you like the 2.73's and 33's with the 360? does the 360 have enough grunt to tote around a cj at a respectable rate of speed. i saw that you said it is not so good for wheelin but for a DD it works well.
    i will have a t-176 and you have a t-18 so that will differ a bit. do you use granny (have to use granny gear) to get moving from a stop light? i am just looking for some feedback thanks.

    p.s my jeep has howell injection so that may make a small difference.. :flamejump
    body off 80 cj5
    resto started 10-31-04
    360, t-176, d300
    86 CJ widetrack axles
    2.73 gears with d44 rear
    33-10.5 bfg at's
    j-20 steer box
    warn 8274
    JKS disco's
    alcan custom 3.5" rear & 4" front springs
    howell C.A.R.B approved 50 state legal T.B.I

    in the process of final assembly now.

  7. #7
    Registered gedwards's Avatar
    Join Date
    Nov 2002
    Location
    Columbia Missouri
    Posts
    596

    Default

    Quote Originally Posted by cobra5laddict
    sonic, & others with 33's and 2.73 gears

    i am going to have a similar setup once my jeep is back on the road.. how do you like the 2.73's and 33's with the 360? does the 360 have enough grunt to tote around a cj at a respectable rate of speed. i saw that you said it is not so good for wheelin but for a DD it works well.
    i will have a t-176 and you have a t-18 so that will differ a bit. do you use granny (have to use granny gear) to get moving from a stop light? i am just looking for some feedback thanks.

    p.s my jeep has howell injection so that may make a small difference.. :flamejump
    My clutch and I both hate the 2.73 gears. I am currently running 31x10.50's because of the 2.73 gears. The 360 has MORE than enough grunt to make my CJ5 move, break parts, etc. As far as making it move at a respectable rate of speed, it'll do everything that's on the speedo and then some, or it'll grunt along at 10 mph in third gear without breaking a sweat.

    The only reason I haven't gone to lower gears yet, is because I keep teetering on building the axles I have or switching to a set of waggy 20/44 axles.

    Make sure your T-176 is healthy when you put it all back together. If it's not, it won't last long unless your really nice to it. The T-176 will easily withstand V8 power as mine has for three years now, so long as it's not already having problems. If you can come up with a T-18 or NP435 for the right money and have the coin to buy the adapters, I'd do it now.

    1982 CJ5 with stuff.

  8. #8
    Registered
    Join Date
    Aug 2004
    Location
    denver co
    Posts
    508

    Default

    My clutch and I both hate the 2.73 gears. I am currently running 31x10.50's because of the 2.73 gears. The 360 has MORE than enough grunt to make my CJ5 move, break parts, etc. As far as making it move at a respectable rate of speed, it'll do everything that's on the speedo and then some, or it'll grunt along at 10 mph in third gear without breaking a sweat.
    so when you say that you hate the 2.73's is that because you really have to ride the clutch to get it going,? or because the off road gearing is less than one would hope for?
    my jeep will be 95% street use as a cruiser with the top off. as far as top speed i am not really worried about it.. no faster than 65 or so for me in a cj5.. it will be nice on the highway to not have that 360 revving to 2,500 rpm's for 2 hours on my way to camp / fish.
    the t-176 i have is a runner and did not seem to have any probelms. i dont really think it has been rebuilt in a while.. (that is why i have an extra i am going to rebuild once i get the jeep on the road that way i can swap it out if the one i have gives me trouble.) anyway i was just looking for some "real world" experiance with the combo.

    thanks for the feedback, anyone else?
    body off 80 cj5
    resto started 10-31-04
    360, t-176, d300
    86 CJ widetrack axles
    2.73 gears with d44 rear
    33-10.5 bfg at's
    j-20 steer box
    warn 8274
    JKS disco's
    alcan custom 3.5" rear & 4" front springs
    howell C.A.R.B approved 50 state legal T.B.I

    in the process of final assembly now.

  9. #9

    Default

    I use the granny low 1st gear all the time. The only problem is in traffic if I need to shift back into 1st I need to stop. But other then that no problems it has plenty of power and can break them free on the pavement anytime I want.

    ED
    ========================================
    1982/1983 Cj-7 360/T-18 33"'s

  10. #10
    Forum Leader John Strenk's Avatar
    Join Date
    Feb 2001
    Location
    Kent, Oh
    Posts
    9,772

    Default

    Quote Originally Posted by soniccj7
    Thought I would share what my Jeep gets for MPG.I checked today after filling up and I got 18 MPG

    AMC 360 Edlebrock 650CFM M20 2:73's t-18 4spd 33's tires. Not good for trail but great for a DD.

    ED

    It just goes to show. It takes X amount of fuel to get were your going and if your engine is efficent enough, it's not going to matter if it's a 360 or a 151.

  11. #11
    Registered shays4me's Avatar
    Join Date
    Jan 2005
    Location
    Oregon
    Posts
    1,385

    Default

    Yeah I went 80 miles in my CJ7 over a mountain pass a couple days back. I got 11.6 mpg. My full size 300 hp 3/4 ton 4x4 69 Suburban will do 12!
    13 JKUR Stock mall crawler

    84CJ7 SBC, T19, D300, D30/AMC20HD, 3" Black Diamond lift, ground up Almost done!

  12. #12
    Registered oldstyle's Avatar
    Join Date
    Dec 2002
    Location
    Jacksonville, Florida
    Posts
    632

    Default

    Mine gets 14 mpg in town and 18 mpg on the highway. 360 with Edelbrock 600, stock ignition, T-18, 4:10s, and 35 inch radials. The cam makes a huge difference. Mine is a stock replacement for 1980 standards.
    David's Law: Nothing is easy. Everything is a project.

    '80 CJ7- owned 23 years, built oldstyle with AMC 360, T-18, Scout axles.

    Salvage/rebuilt 2006 Wrangler Unlimited 4.0, auto, and COLD A/C!

    This one died so others may may live!

  13. #13
    Registered
    Join Date
    Sep 2003
    Location
    Nashville, TN
    Posts
    1,348

    Default

    COBRA, I have 3.07's, T177, 360 and 33's and hate it. For on road and off. I couldent imagine 2.73's. It is nice at 65mph but I think its still to high and could easly go 70-75 before it starts to get annoying. I will be regearing soon to at the least 3.73.

    Take a look at this to figure you crusing speed and what gears you have.
    1979 JEEP CJ7 "NIGHTMARE". Sold it.
    1985 Jeep CJ7. Done!
    1983 CJ7 Renegade. 4.6L stroker, NSG 370 6 speed, Dana 300, 2 1/2 lift, ARBs.
    1983 CJ8 Scrambler. Full restoration underway.

  14. #14
    I'm up. KoolBreeze's Avatar
    Join Date
    Jul 2002
    Location
    Reality
    Posts
    5,375

    Default

    Quote Originally Posted by John Strenk
    It just goes to show. It takes X amount of fuel to get were your going and if your engine is efficent enough, it's not going to matter if it's a 360 or a 151.


    funny how that seems to work out. to throw another in there for comparison, when I wasn't caring what the mpg were, no matter how hard I drove around, the CJ7 with 304 (rebuilt to my specs) 31/33's, 3.54's and T150 got 14mpg average. (in town, freeway only, mixed... whatever) once with 33's taking it light (keeping it under 75mph or so on freeway for long stretch) the best I got was 18mpg or so.

    my neighbor at the time was only getting around 8mpg with his stock 304 CJ5 and 31's (pretty sure he had 3.54's also although maybe they were 4.11's just don't remember)


    I get around 16 in teh Tj and 4.0. while missing the V8 power.
    "Character, in the long run, is the decisive factor in the life of an individual and of nations alike."
    -Theodore Roosevelt

  15. #15
    Registered bigmackloud's Avatar
    Join Date
    Apr 2000
    Location
    NC Raleigh USA
    Posts
    2,856

    Default

    Hey,

    my 360 V8, 4.56 gears, and 35" Boggers netted me right at 10mpg on the hwy. hate to even think what i'm getting ripping through the gears around town, lol. luckily i only drive it on the weekends. but yea, the 360 has lots of power. with my t18 i always start out using 2nd on the street. it has no problem idling along in 4th gear. and can wear out my Boggers from a stand still if i ask it too.

    happy trails,
    bigmac
    '96 XJ Country - Flame Red
    4" Lift - 31" GY DuraTracs on 16" Rubicon wheels
    LockRight - Rear
    IDQ 10" in custom Vantage box
    US Acoustics 280w amp
    Rusty's K&N Intake & Transdapt TBS
    Banks Torque Tube Header
    Custom 2.5" Downpipe
    Catco "high-flow" converter
    Rusty's Flowmaster Cat-back

    '80 CJ5 - Black
    AMC 360 - Headers, TFI
    T18/D20 - D30 locked w/chromos - Ford 9" locked
    35x14.5 Boggers - 4.56 gears
    --Sold--

    2000 Mustang GT
    Heads/cams/blower = 613rwhp

  16. #16

    Default

    I'm jealous! 18 mpg :rockz: I get around 10 mpg with a Turbo 400, 4.10 gears, and 38" TSLs.

  17. #17
    Registered
    Join Date
    Aug 2002
    Location
    Monterey, CA, USA and Quito, Ecuador, South America
    Posts
    253

    Default

    I have an Edelbrock 1406 600cfm carb, cam, manifold and Heads, DUI Distributor and live at 9800 feet of altitude... I only get 9 MPG :sadpink:
    - Pablo

    2013 JK Sport 6-Speed Manual
    2005 WK Limited 5.7 Hemi (wife's)
    1981 CJ-7 Laredo 360 V8


    2011 JK Sahara Auto 3.8 V6 (sold)
    2003 TJ Rubicon (sold)
    2002 KJ Sport 3.7 V6 (sold)
    2000 WJ Laredo QuadraDrive 4.7V8 (sold)
    1998 TJ Sahara (sold)
    1996 XJ Sport 4.0L (sold)
    1978 CJ-7 Renegade 304 V8 (sold)
    1992 YJ Base 4.0L (sold)
    1979 CJ-7 258 inline-six (sold)

  18. #18
    Forum Leader John Strenk's Avatar
    Join Date
    Feb 2001
    Location
    Kent, Oh
    Posts
    9,772

    Default

    Quote Originally Posted by pablorg
    I have an Edelbrock 1406 600cfm carb, cam, manifold and Heads, DUI Distributor and live at 9800 feet of altitude... I only get 9 MPG :sadpink:
    Yeah but you drive 100 ft in any direction and your alttitude will vary 200'.

    Got any pictures of jeeping in Equador?

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Jeep Parts | Jeep Accessories | Trektop NX | Jeep Seat Covers | Jeep Wrangler | Jeep Wrangler Parts | Jeep Wrangler Accessories | Bestop | Jeep Tires | Jeep Stuff | Jeep Wrangler Tires | Jeep Wheels