What are you lifted/big tire guys getting for gas mileage??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kickinasphalt · 07-25-2004, 09:56 PM

I have had my 6" lift and 35's on for a few weeks now and starting to realize what crappy gas mileage I get. Now this pickup is no daily driver so it doesn't concern me that much. I haven't figured it out exactly but I think I'm getting around 7-8 MPG. I have a mild 350 with a 600cfm Edelbrock, manual trans and 3.73 (about 2500 RPM at 65MPH). Does the 35x12.5 have more to do with then the lift?

Mike C · 07-25-2004, 10:07 PM

I have 4" lift on the Jimmy with 35's and 4.10s. With a Jet Q-jet and little cam (210@.050) in the 331, it gets 14 mpg. It is also a manual trans.

Mudder · 07-25-2004, 10:09 PM

I'm thinking (no way of really knowing) about 12 mpg with 35's and 4.10's.

Pont · 07-25-2004, 11:57 PM

About 10 mpg (with a BB & manual trans) with 35's and 4.10's

drink2mny · 07-26-2004, 12:04 AM

HAHAHAHAHA

Good one!!
I say gas milage is over rated once you go big..
I figure with running in overdrive with 38's and 4.10's maybe 6-7..

**JIMs70GMC** · 07-26-2004, 07:30 AM

With 4.10s and 35s around 10. The 71 w/ 4.56s and 35s not sure.

Dean · 07-26-2004, 07:33 AM

I refuse to check it....lol. All I can say is bad. Doesn't matter if I'm towing a trailer or not.

2wdBlazer · 07-26-2004, 09:04 AM

I dunno either but, take really bad x your screwed = my mileage.

stan79chevy · 07-26-2004, 11:18 PM

i have 33's with 4.56 and that comes out to about 10 or less

badblazerbabe · 07-27-2004, 06:20 PM

Sucky, but I also drive mine everyday including to school three days a week!!!!

LONGHAIR · 07-27-2004, 07:50 PM

As crazy as it sounds, A lower gear ratio will probably help. If you go to a 4.10 or even 4.56 your in-town milage will likely go up. This is because you don't have to press the throttle pedal as far to get up to speed. The higher gears may be better on the highway.......it depends upon where you do your driving most.

smokkey1 · 07-27-2004, 10:46 PM

stock 350tbi,th400 and 4.10 with 36's
I have know Idea, but I'm guessing around 10mpg

*1FaastC10* · 07-27-2004, 11:14 PM

Quote:

Originally Posted by drink2mny

HAHAHAHAHA

Good one!!
I say gas milage is over rated once you go big..
I figure with running in overdrive with 38's and 4.10's maybe 6-7..

upgrade the gears to something lower (4.56+) and i bet your milage increases, as well as helps your trans survive. RPMs are just too low for it to operate reliably.

500HP/SB · 07-29-2004, 02:42 AM

35's, 3.07(ouch!!!) dual quads(eeek!!), SM465, About 8mpg, 2000rpm at 65 mph

Bradleyworld · 07-30-2004, 12:40 AM

70 Chevy 4x4 with an almost new ZZ4 350, 4inch lift and 33s, I get a whopping 9MPG (on the friggin freeway!), and 8.6 MPG towing my boat.

That really sucks when you pay CA prices for gas and ya can't use regular!

Bradleyworld

bouncytruck · 07-30-2004, 11:12 AM

My '69 has 35's & 4.10's with a mild built engine. Gets around 6-8.
The '72 has stock tires and 3.07's with a bone stock engine and it gets around 12-14. A/C greatly reduces that number!

Gunny · 07-31-2004, 07:34 AM

I have not lifted my 88 Suburban yet but with 31's and unknown gear ratio (have not had a chance to check yet) 6.2 diesel with the 700r4 I average 18 mpg at 75 mph towing my jeep or not towing my jeep - I am looking at lifting it around 5 - 6 inches and going with 33 wild country tires - at that time I will check the gearing and modify as needed.

now my 87 Cherokee 4.0 5 speed with 6.5 inch lift, 4.10's, 32 BFG's gets about 12 - 13 city and up to 22 highway (overall avg hwy is 20 mpg) at 80 mph - but I have bored the Thottle body, yanked out the breather box and fab'ed a cold 9 in x 5 in round air cone filter breather, hood vents (has lowered the temp 10 degrees at highway speeds), flowmaster 44 with 3 inch pipe plus a few other odds and ends to help performance.

my NON lifted T-Bird

gets about 10 city and 14 hwy completely stock except for a 1406 edlebrock carb (300 hp 390 from the factory)

Gunny

ABHaulR · 08-02-2004, 12:49 AM

around town 10
on the hwy with overdrive and 4:56 and 40's
16
Dwayne

Grim Reaper · 08-02-2004, 10:06 AM

Quote:

Originally Posted by ABHaulR

around town 10
on the hwy with overdrive and 4:56 and 40's
16
Dwayne

Cough Yeah right. Get the speedo check its off.

I get 9.2mpg hwy on 75 jimmy TRACKED WITH GPS. 350, TH350, Converted NP203, 4.10 and BFG 35's 4/6 lift

Destructo · 08-02-2004, 12:00 PM

I get about 12 in my 85 K10 with 4" lift and 33x12.5" tires, thats with a 350 with bolt-ons and a Q-Jet that doesn't run right part-throttle.

Bobalouie · 08-02-2004, 12:01 PM

All stock never rebuilt 350/205 w/ 32x11.5s and 3.07 gears gets me 11mpg hwy.

Joey-D · 08-24-2004, 08:22 PM

My old 92 GMC had a 351 TBI with KN round top with a cyclone top, Hypertech chip, Throttle Body Spacer, and true dual exhaust, turbo 350 3.42 gears and 35s got 8 mpg no matter if I was on the highway in the city driving like a grandma or Jeff Gordan.

My new 85 with a mild 350 with a holly 650, sm465 direct drive, 4.10s and 38.5 Boggers get 8 on the highway and around 6-7 in the city, but then again I race stop light to stop light. I just love the yuppies in the drop tops coughing on my 3 inch dumps as the light turns green

07-25-2004, 09:56 PM	#1
kickinasphalt Registered User Join Date: Jan 2000 Location: North Dakota Posts: 351	What are you lifted/big tire guys getting for gas mileage??? I have had my 6" lift and 35's on for a few weeks now and starting to realize what crappy gas mileage I get. Now this pickup is no daily driver so it doesn't concern me that much. I haven't figured it out exactly but I think I'm getting around 7-8 MPG. I have a mild 350 with a 600cfm Edelbrock, manual trans and 3.73 (about 2500 RPM at 65MPH). Does the 35x12.5 have more to do with then the lift? __________________ 1972 K-10 Longbox,6" lift w/35's/350/SM465/NP205/3.73 1972 C-10 Longbox,350/350 1998 Pontiac Grand Prix GTP FOR SALE: 1971 K-10 Longbox,350/SM465/NP205

07-25-2004, 10:07 PM	#2
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,714	I have 4" lift on the Jimmy with 35's and 4.10s. With a Jet Q-jet and little cam (210@.050) in the 331, it gets 14 mpg. It is also a manual trans. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

07-25-2004, 11:57 PM	#4
Pont I need another Barley Pop Join Date: Feb 2001 Location: Grants Pass, OR Posts: 1,629	About 10 mpg (with a BB & manual trans) with 35's and 4.10's __________________ 67 Short Fleet 4x4 04 Honda CRF450R 89 Toyota 4-Runner 34 Ford 2 door sedan - Long term project ---------------------------------------------- There is a very fine line between "hobby" and "mental illness"

07-26-2004, 12:04 AM	#5
drink2mny Registered User Join Date: Jun 2003 Location: spokane wa Posts: 2,189	HAHAHAHAHA Good one!! I say gas milage is over rated once you go big.. I figure with running in overdrive with 38's and 4.10's maybe 6-7.. __________________ Support The Board

07-26-2004, 07:30 AM	#6
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	With 4.10s and 35s around 10. The 71 w/ 4.56s and 35s not sure. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

07-25-2004, 10:09 PM	#3
Mudder Registered User Join Date: Feb 2001 Location: East Central, MO Posts: 11,336	I'm thinking (no way of really knowing) about 12 mpg with 35's and 4.10's.

07-26-2004, 07:33 AM	#7
Dean Senior Member Join Date: Jan 2000 Location: Cincinnati, Ohio Posts: 1,492	I refuse to check it....lol. All I can say is bad. Doesn't matter if I'm towing a trailer or not.

07-26-2004, 09:04 AM	#8
2wdBlazer The Blazer King Join Date: Sep 2000 Location: Valrico, Fl (Tampa) Posts: 1,213	I dunno either but, take really bad x your screwed = my mileage. __________________ 72 2wd Blazer. Its the superbichinest, megacoolinest, superflowinest.

07-26-2004, 11:18 PM	#9
stan79chevy Registered User Join Date: Sep 2003 Location: COVINGTON GEORGIA Posts: 477	i get more smiles per gallon i have 33's with 4.56 and that comes out to about 10 or less __________________ 79 chevy k20 350/350/205/D44/14bFF 4.56 gears rock LWB pimer black 01 S-10 ZR2 extended cab 4.3/4L60E/233 3.73 gear 31" DICK CEPEK CRUSHERS

07-27-2004, 06:20 PM	#10
badblazerbabe Size does Matter Join Date: Nov 2002 Location: Grove City, Pa Posts: 112	Sucky, but I also drive mine everyday including to school three days a week!!!! __________________ Who Said Bad Ass Toyz were just for Boyz????? --------------------------------------------------- 92 Chevy Blazer (6 in Super-lift w/ 35's) 71 Chevy Blazer 2-wheel drive 2006 GMC Sierra D-Max 72 chevy short bed 4X4

07-27-2004, 07:50 PM	#11
LONGHAIR just can't cover up my redneck Join Date: May 2004 Location: Columbus OH Posts: 11,414	As crazy as it sounds, A lower gear ratio will probably help. If you go to a 4.10 or even 4.56 your in-town milage will likely go up. This is because you don't have to press the throttle pedal as far to get up to speed. The higher gears may be better on the highway.......it depends upon where you do your driving most.

07-27-2004, 10:46 PM	#12
smokkey1 Land Beast Join Date: Nov 2003 Location: Los Angeles Posts: 134	stock 350tbi,th400 and 4.10 with 36's I have know Idea, but I'm guessing around 10mpg __________________ 90' GMC 1 Ton Suburban

07-29-2004, 02:42 AM	#14
500HP/SB please don't break Join Date: Sep 2003 Location: southern california Posts: 173	35's, 3.07(ouch!!!) dual quads(eeek!!), SM465, About 8mpg, 2000rpm at 65 mph __________________ 70 k10 35s 350/sm465/np205 titanspeed.com

07-30-2004, 12:40 AM	#15
Bradleyworld Registered User Join Date: Feb 2004 Location: Central ca Posts: 51	70 Chevy 4x4 with an almost new ZZ4 350, 4inch lift and 33s, I get a whopping 9MPG (on the friggin freeway!), and 8.6 MPG towing my boat. That really sucks when you pay CA prices for gas and ya can't use regular! Bradleyworld

07-30-2004, 11:12 AM	#16
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,049	My '69 has 35's & 4.10's with a mild built engine. Gets around 6-8. The '72 has stock tires and 3.07's with a bone stock engine and it gets around 12-14. A/C greatly reduces that number! __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L



Register or Log In To remove these advertisements.

07-31-2004, 07:34 AM	#17
Gunny runnin on empty Join Date: Jun 2004 Location: Middle Georgia Posts: 115	I have not lifted my 88 Suburban yet but with 31's and unknown gear ratio (have not had a chance to check yet) 6.2 diesel with the 700r4 I average 18 mpg at 75 mph towing my jeep or not towing my jeep - I am looking at lifting it around 5 - 6 inches and going with 33 wild country tires - at that time I will check the gearing and modify as needed. now my 87 Cherokee 4.0 5 speed with 6.5 inch lift, 4.10's, 32 BFG's gets about 12 - 13 city and up to 22 highway (overall avg hwy is 20 mpg) at 80 mph - but I have bored the Thottle body, yanked out the breather box and fab'ed a cold 9 in x 5 in round air cone filter breather, hood vents (has lowered the temp 10 degrees at highway speeds), flowmaster 44 with 3 inch pipe plus a few other odds and ends to help performance. my NON lifted T-Bird gets about 10 city and 14 hwy completely stock except for a 1406 edlebrock carb (300 hp 390 from the factory) Gunny __________________ 88 GMC Suburban - 6.2 Diesel 4x4 87 Jeep Cherokee - 6" lift, 32 bfg's, way too many mods to list. 65 Thunderbird - Stock United States Marine Corps SEPIUS EXERTUS, SEMPER FIDELIS, FRATER INFINITAS "Often Tested, Always Faithful, Brothers Forever"

08-02-2004, 12:49 AM	#18
ABHaulR Registered User Join Date: Jun 2003 Location: West Valley City, Ut Posts: 311	around town 10 on the hwy with overdrive and 4:56 and 40's 16 Dwayne __________________ 72' GMC Suburban 10 1/2" of Lift, 40" Tires! Waiting for restoration 67' Chevy, What to do??? And Bad Ass American Bulldogs!

08-02-2004, 12:00 PM	#20
Destructo Registered User Join Date: Sep 2003 Location: Lewisville, NC Posts: 1,836	I get about 12 in my 85 K10 with 4" lift and 33x12.5" tires, thats with a 350 with bolt-ons and a Q-Jet that doesn't run right part-throttle. __________________ 1985 Scottsdale Shortbed 4x4 Stout 350 with some "upgrades"-700r4-33x12.5" Mud Tires, Warn 8274-50 winch. 2005 Chevrolet Colorado Regular Cab 2wd 4-banger, 5 speed, Street Pack with 3.73 axle.

08-02-2004, 12:01 PM	#21
Bobalouie Fetzer Valve Technician Join Date: Jun 2003 Location: Stillwater, OK Posts: 205	All stock never rebuilt 350/205 w/ 32x11.5s and 3.07 gears gets me 11mpg hwy. __________________ 1972 Chevy K10 SWB

08-24-2004, 08:22 PM	#22
Joey-D City's Articulation Ramp Join Date: Jan 2004 Location: St. Louis Missouri Posts: 452	My old 92 GMC had a 351 TBI with KN round top with a cyclone top, Hypertech chip, Throttle Body Spacer, and true dual exhaust, turbo 350 3.42 gears and 35s got 8 mpg no matter if I was on the highway in the city driving like a grandma or Jeff Gordan. My new 85 with a mild 350 with a holly 650, sm465 direct drive, 4.10s and 38.5 Boggers get 8 on the highway and around 6-7 in the city, but then again I race stop light to stop light. I just love the yuppies in the drop tops coughing on my 3 inch dumps as the light turns green __________________ 85 K90 SWB Rockwells 46x19.5 on double beadlocks 20" lift 305/sm465/NP208 Toy 00 Silverado 2wd SWB 4.8 auto 3/4 drop slamair bags esclade rims Daily Driver 06 Harley Sporster 883 low 19?? Zamboni, Really I own a Zamboni! "If your gonna be stupid, then you better be tough."

Register or Log In To remove these advertisements.