powertrain-everyone!

[coboyle04]

what are you running?

engine
carb
trans
axles ratio
tires

now how many miles per gallon do you get?

 

[markperry]

engine= 351
carb= edelbrock 600
trans= c4
axles ratio= 4.11
tires= 33

now how many miles per gallon do you get? 11.5

 

[Broncobowsher]

The last one I had...

engine 351W, 11:1 compression, aluminum heads
carb Projection 4Di (outdated)
trans 4R70W
axles ratio 4.88
tires 33

12-13 MPG, a day on the trails would be under 10

 

[nik]

Engine: 302 with newer heads
Carb: Stock 2bbl Motorcraft
Trans: ZF5
Axle ratio: 4.88
Tires: 35

MPG: 10-12 hwy (at 70), 8-9 around town

 

[broncnaz]

Didnt your other thread basically cover this?
There are a few more factors that affect MPG other than what engine, carb, trans, gearing and tire size, we all run. Yes those are some of the main factors but camshaft is one of the all important things as well. maybe even more important that some of the others as it should be matched to your overall combonation.
mileage on my 73 is 15-17 at 65mph depending on wind direction. 13-14 at 75mph. rest of the specs are below. havent tried to figure out what my 71 gets yet.

 

[73azbronco]

To place it in perspective, I dropped dime on a 2012 Jeep unlimited with the new motor as a chase "wife" truck, thought I'd get close to the 20 sticker MPG, I get 14mpg, 2 less than my 170 6 cyl. 46 years of technology and it gets worse MPG. Does drive nice though.

 

[coboyle04]

my other thread attempted to cover this but it became a silly debate over buying a toyota/honda instead.....thank you all for your contributions.....

 

[coboyle04]

tell me more about your old 170

 

[pcf_mark]

I'll play along..

stock '68 289 with Performer and Holley 600
stock C4
3:70 gears
stock height and weight

When I had the 3 spd on tree it was close to 13 mpg. With the C4 it is closer to 11 than 12. Pretty good state of tune but I think I can get a little better mpg.

 

[Broncobowsher]

1 oz of acitone per 10 gals will give you 2 mpg more. I will try to find it and post it. Just my .02 cents worth.

You are in the wrong thread
Stop hijacking

 

[Lmfp]

Before i pulled my tired 302 out with pertronix and a holley 600 4bbli was getting 7mpg period... Thats with 3.50 gears and 33" tires all stock suspension. Ill let ya know in a couple months when its running again what the new figures are.

 

[mtxride]

Explorer 5.0
FI
NV3550
4.10
31 x 10.50
I just took my first MPG reading since the motor/trans swap which was 14.9

 

[dube]

You are in the wrong thread
Stop hijacking

sorry broncoballwasher. won't happen again.

 

[coboyle04]

great guys thanks keep the posts comming!

 

[Ranchtruck]

306/gt40 heads/edelb perf 289 manifold
Autolite 4100
Stock 3spd
4.10's
235/85r16's

Abysmal MPG, probably GPM actually. It's started, driven to the hay barn, the trailer is loaded, driven out to the field, bales spread out and cut, driven back and shut off. Probably 45mins of run time a day every day all fall and winter.

 

[sprdv1]

engine - 302 explorer motor
carb - cheby throttle body
trans - C4
axles ratio - 4.88
tires - 37 x 13.50 Pit Bull Rockers.

now how many miles per gallon do you get? No freakin clue, 10 ish..

 

[wildbill]

1969 351W 4V Erson cam
Hooker headers, unlite
Top loader 4 speed wide rato.
4:11 D/locker rear true track front
Carter 625
33:12.50X15's
;D Bill ;D

 

[xcntrk]

engine = 68' 302 (bored .60 over - 310ci), edelbrock intake, long tube headers, electronic ignition, recurved dizzy.
carb = Holley 1850 (600cfm 4bl), 1" spacer, low profile cleaner.
trans = 3spd RAT (to be replaced with NV3500)
axle ratio = 4:10
tires = 33x12.5

No idea on MPG as my odometer doesn't work and therefore my rig doesn't age!

 

[bmc69]

Engine: 400 (408ci, .030 over) with Australian 302c heads (190cc, 2.07"intake/1.65" ex)
Induction: Commander 950 900CFM 4V TBI
Trans: T-18/NP-205
Axle ratio: 4.88
Tires: 39.5
MPG: 10 hwy (at 65)

 

[Viperwolf1]

engine = '89 5.0, explorer intake, mustang HO cam, advanced 4 degrees, BCB headers, AFR165 heads, forged pistons, milled block, decked heads, balanced, 9.7:1, EGR
carb = what's a carb? 19 lb injectors, A9P ECM
trans = C4, 5 direct clutches, rigid intermediate band, raybestos stage 1 clutches, case and pump mods
axle ratio = 4:10
tires = 33x12.5

MPG directly tied to throttle pressure. 13.5 in town average, a little better on the highway if I keep speeds below 70 mph.