well i was thinking about putting either a 454 or 427 in my truck, just wondering if anyone has any experince with these motors on the road,

truck will be running dana 60's with 38 or 39" tires , 4 speed standard.its got the aluminum transfer case too, cant think of the name.

its an 87 chev 1500 7" lift with 3" magnaflow dual exhaust.
350 and 35" MT baja claws, its actually comparable to my 09 cobalt and that gets 30 MPG. but i just want something a little more beastly. lol ....what should i expect for fuel milage?

when you run a lifted bbc.. you dont go by mpg anymore... you go by fpg.. (feet per gallon) and they way you say your building it you should be about 400-550 depends on driving style... but for serious you dont have a big block and try to be green with it... they werent meant to get good mileage.. but they do get the same mileage weather your pullin a mountain or not..

you're trying to tell me you get 30mpg now.

its an 87 chev 1500 7" lift with 3" magnaflow dual exhaust. 350 and 35" MT baja claws

its actually comparable to my 09 cobalt and that gets 30 MPG.

:lmao:

well i was thinking about putting either a 454 or 427 in my truck, just wondering if anyone has any experince with these motors on the road,

truck will be running dana 60's with 38 or 39" tires , 4 speed standard.its got the aluminum transfer case too, cant think of the name.

its an 87 chev 1500 7" lift with 3" magnaflow dual exhaust.
350 and 35" MT baja claws, its actually comparable to my 09 cobalt and that gets 30 MPG. but i just want something a little more beastly. lol ....what should i expect for fuel milage?

Since your obviously in need of direction. It will be about 8 to 12 if your super lucky.

Since your obviously in need of direction. It will be about 8 to 12 if your super lucky.


Super lucky...

More like 4-6 MPG.

6 mpg? come on man it cant really be THAT bad... the bigger tires should help with the milage a little bit, once you get those things rolling it wouldnt take much gas to keep them going.

6 mpg? come on man it cant really be THAT bad... the bigger tires should help with the milage a little bit, once you get those things rolling it wouldnt take much gas to keep them going.

You are a genius. You figured it all out.
You are right. You amaze me.
Report back with your actual measured, calibrated testing and you can publish a paper and win the Nobel (hell, anyone can get one it seems)
Good luck with it.

dude, I have a 450hp 302 in my truck (89 f-150) with 33s 4.56 gears and an aod (overdrive tranny) my highway mileage is between 5-8 depending on how windy it is out. I am running a 750 trick fuel carb. With a 454 you will want probably a 850 carb and you will probably get between 6 to 8 mpg i will bet money you won't get more than 10mpg. The only reason you will get better mileage than me is you will have more torque at low rpms, that is if you can keep your rpms down at 60 (i don't feel like doing the calculations to see what rpm your at at 60 with your setup)

seeing that i run a 275hp 454/ 465 with 4.56s and bald 38's and get 6-8 with less lift.............



the bigger tires for the gear theroy works on paper.

ever notice that when you shift the same amount of throttle that was holding you at 3000 is now holding you at 2200? bigger tires do the same. loading the motor more will reduce the motor rpm, but it will take more fuel to maintain the same rpm.

If you ever even see double digits it would be a miracle. My 454s idle at gallons per minutes. But if you get 30mpg now, I suppose you'll get 20 with a 454.:laughing:

30? Your tuck defies the laws of physics. lol I have a small block vortec on 35s 3.73's (soon 4.10) and lucky if I get 13. After K&N filter, magnaflow 3" dual exhaust, programmer, and E-fan conv. A 454 I wouldnt expect any more than 10-11 at best. Maybe 12 going down hill. Youd think bigger tires would help beings it lowers the RPM's, but if youre out of your power range it has a luggin effect and uses more gas. Not sure how would that affect a BB though with more low end torque.

lol i dunno man i dont think it would be as low as 10 mpg... that 4 speed i have is geared pretty tall, 4th pretty much is an overdrive gear.

im figuring on 20

better get a different calculator than the one you are using for your figuring.

If you get 20 you better pattent what ever the hell you are doing and the nations oil problem will be solved.

later
jenks

lol i dunno man i dont think it would be as low as 10 mpg... that 4 speed i have is geared pretty tall, 4th pretty much is an overdrive gear.

im figuring on 20

Good luck with that.

lol i dunno man i dont think it would be as low as 10 mpg... that 4 speed i have is geared pretty tall, 4th pretty much is an overdrive gear.

im figuring on 20

Whatever your :smokin:
Please pass the bong.

I have a real hard time believing 30 MPG in a 4X4 Chevy truck.:shaking: My '81 Power Wagon on 35's, 3.55 gears with a 318, Edelbrock Street Master intake, 600 double pumper, Hookers, 2-1/2" exhaust and straight through Thrush gets 10-12.....maybe 14 with a tail wind.

if i drive my car like i always do, (balls out , hitting redline in every gear), and drive my truck easy (dont open 4 barrel) i can get ALMOST as much driving out of it.
i drove from st george to st andrews and back for 15 bucks, it costs me about ten in the car.

if i drive my car like i always do, (balls out , hitting redline in every gear), and drive my truck easy (dont open 4 barrel) i can get ALMOST as much driving out of it.
i drove from st george to st andrews and back for 15 bucks, it costs me about ten in the car.

using your own math, 50% more isn't "almost" in pretty much anyone's book...

really man, do you know the formula to figure gas milage? we'll share... at pirate we're all about the love and increasing brotherhood and knowledge of our common man.

lol i dunno man i dont think it would be as low as 10 mpg... that 4 speed i have is geared pretty tall, 4th pretty much is an overdrive gear.

im figuring on 20

wat?

http://i268.photobucket.com/albums/jj21/jenx21/bxp28059.jpg

http://www.bwjoke.com/pic/budweiser.jpg

listen here, i know what i get for milage because my car has a computer that measures it.
8.1 liters per hundred km's
so next time you feel like running your fuckin lips maybe you should get a little educated first,before you start talking to me like im an idiot.
now see your way the fuck out of my thread until you have something at least a little bit intelligent to say.
fuckin asshole.

This guy has to be a joker , jerking us around!!!!!!!!!!!:rolleyes:
Real world farm/ranch use , when factory new, was 6-10 mpg. Loaded or empty didn't seem to make much difference. The honesty and integrity of anybody who claimed to get over over 10 mpg was suspect.
I've never smoked weed, but this guy is obviously on something stronger.:shaking:

lol i dunno man i dont think it would be as low as 10 mpg... that 4 speed i have is geared pretty tall, 4th pretty much is an overdrive gear.

im figuring on 20

Ok well. Your on crack or just plane, old fashioned, stupid. If you went EFI it will still be horrible...


Large displacement engine...means .... wait lots of air and fuel... You only chance is to not to have a huge amount of wind resistance.


On a side note.... you would get the same millage in a motor home, so its more than likely is no help to even be the slipperiest machine know to man

20 MILES per gallon? or 20 KM per gallon?

My first car was a 72 Olds Toronado (think barge) with a 454...on a good day it got 12 mpg...and that pup was kept tuned...

listen here, i know what i get for milage because my car has a computer that measures it.
8.1 liters per hundred km's
so next time you feel like running your fuckin lips maybe you should get a little educated first,before you start talking to me like im an idiot.
now see your way the fuck out of my thread until you have something at least a little bit intelligent to say.
fuckin asshole.

butthurt much?

dude, really? you expect to get 20mpg from a big block. Not even if you put it on a friggin motorcycle (well, ok, maybe if you put it on a bike frame), but in a full size truck that's lifted with big meats?

I may be an asshole, but at least I'm not a hard headded, ignorant fucker that's too proud to say "thanks for making me realize I'm fucking up"

butthurt much?

dude, really? you expect to get 20mpg from a big block. Not even if you put it on a friggin motorcycle (well, ok, maybe if you put it on a bike frame), but in a full size truck that's lifted with big meats?

I may be an asshole, but at least I'm not a hard headded, ignorant fucker that's too proud to say "thanks for making me realize I'm fucking up"

Well Put! :evil:

if i drive my car like i always do, (balls out , hitting redline in every gear), and drive my truck easy (dont open 4 barrel) i can get ALMOST as much driving out of it.
i drove from st george to st andrews and back for 15 bucks, it costs me about ten in the car.



your cobalt normally gets 30mpg. now balls out redline in every gear lets be nice and say it gets 20mpg

15 bucks vs 10 bucks = 33% less

20 mpg in the cobalt balls out - 33% for the truck = 13.2mpg for the truck

your truck with 350 and 35's currently gets 13.2 mpg, by your own accounts.

put a big block in it with that sm465 and I'll kiss your ass if it gets 8mpg

:D

funniest thread EVAR!

I think I fiured it out. I think he's figuring miles/kms per tank, and the truck obviously has a bigger tank than the Cobalt, so of course it's going to get the "same mileage"


BTW, my bone stock '99 Silverado with 5.3 got 16.x the one time I calculated it. (not towing or hauling)

This guys is nuts!!I was getting about 9MPG with my 2wd 77 1 ton dually crewcab with a built 454 with a sm465 4 speed.Didn't matter what you were doing.Pulling or empty.

well i was hopeping to find some miracle method of getting a few more MPG with my new to me truck. its an 83 reg cab, long bed, dually, rwd, 454. it has an aftermarket edlebrock quadra jet. i just went to hammers and back and it cost me $500 at about 6 mpg weither i was barly touching the gas or floored doing 60 up the tehachepi. i know 6 is average but if i could get 10 mpg out of it that would save me hundreds on a trip like that. ether way im getting somthing else im just trying to get manage for the time bing

well i was hopeping to find some miracle method of getting a few more MPG with my new to me truck. its an 83 reg cab, long bed, dually, rwd, 454. it has an aftermarket edlebrock quadra jet. i just went to hammers and back and it cost me $500 at about 6 mpg weither i was barly touching the gas or floored doing 60 up the tehachepi. i know 6 is average but if i could get 10 mpg out of it that would save me hundreds on a trip like that. ether way im getting somthing else im just trying to get manage for the time bing


Sorry bud, not happening. :D

I was lucky to get 10 mpg (in normal driving) with my '86 Suburban- 350/700r4/208/8 lug 10/14 bolt and 4.10 gears. 265x75x16 tires

Got a best of 12 at 60 mph on a level highway

Towing was 5-8 depending on speed.

I would expect 8-10 with your 454, towing or not.

The OP is cracked out of his damn mind.

Of that I am certain.

If it makes you feel any better, I get 40mpg on my sig truck. (in my dreams only)

Real life: 4mpg. Maybe 4.5 if it sits parked in the driveway for 3 months.

I get 8MPG from my 9000lbs+ empty RV. Why are you guys getting less? I thought mine should be better than 8.

leverage v resistance. and vice versa.

i just swapped 4.56's back to 4.10's and i get exactly the same mpgs, point.shittympg.

a big rv with small tire may have more leverage with more resistsance but my 6,500lb pickup has bigger tires/less leverage but mild resistance.

I was lucky to get 10 mpg (in normal driving) with my '86 Suburban- 350/700r4/208/8 lug 10/14 bolt and 4.10 gears. 265x75x16 tires

Got a best of 12 at 60 mph on a level highway

Towing was 5-8 depending on speed.

I would expect 8-10 with your 454, towing or not.

I have a '87 3/4ton Sub.I have never figured out the MPG.I just guess about 10MPG.EFI 350/TH400/208 4:10's and stock 265x75x16 Michelins.This is running 65-70 on I-70.

A few years ago I had a '79 Suburban with 4" lift and 33" tires.Had SB400/Th350/205 10B/12B.I swapped in a mildly built 454 with same drivetrain.And actually got better mileage.The BB didn't seem to work as hard cruising on the interstate.

I only get about 10 out of my K20 farm truck on 33's with a stock 350, 465, 4.10. Sounds like I should be able to double that if I had bigger tires.

I had a 82 half ton 2wd with stock 350 and a sm465 and doen the highway i got 7-9 but i think it had 3.42's on a 255/70/15

My blazer gets like 40mpg when i pull it with my 2005 that only gets 12 empty!

i had a 82 half ton 2wd with stock 350 and a sm465 and doen the highway i got 7-9 but i think it had 3.42's on a 255/70/15

my blazer gets like 40mpg when i pull it with my 2005 that only gets 12 empty!

i a 97 1ton dulley 454vortec it gets 7to8 at best weather it,s empty or has a 9.5 foot slidein and a 24foot inclosed trailer behind it

i have a 94 k2500 suburban with the 454. the best i have ever measured was 13.5 mpg, all highway taking it easy. the last 5 tanks have been between 5.5 and 6.5 mpg. winter mileage is always worse for me than summer, maybe the higher ethanol content, but more likely the increased amount of warm up idling in the driveway so my wife doesnt have to get into a cold truck

The trolling is strong with the OP but I'll bite.

You will never see over 10 mpg.

I have never had a stock truck get over 15 mpg for everyday driving. S-15 (2.8 ) was the worst, 92 1/2 ton 4x4 350 13-15mpg. Bone stock 03 1500 4x4 5.3, 15 mpg all day long.

If I could get 10 mpg out of my old CJ with a carbed 360 I would have jumped for joy.

Stick with what you got.

Wow dieseldale, just, wow............ I am only 17 years old and don't know a hell of alot about trucks and even I know you would be lucky to get 11MPG out of it with smaller tires and always driving downhill with a tail wind. My parents have a 3/4 ton 2wd '88 suburban with a Turbo 400 transmission and 14bff axle and a TBI 350 and it gets around 13 to 14 MPG average. There is no way in hell that your truck is going to get more than like 11 MPG with a tail wind and downhill if you stick a 454 in it. I'd be surprised if my 3/4 ton '63 GMC 4x4 with a 350, 4 speed, and 31'''s got 13 or 14MPG, hell I'd be happy if it got that good.

Heavy truck, and the key being truck, not even slightly aerodynamic, and big tires = crappy mileage for probably any engine you put in it except for maybe a diesel, and even then it wouldn't be anything to jump for joy over.

I understand that this is the newbie section and I have asked some things here myself, but this takes the cake. Grow up man, do a little reading before asking something like this, and don't bitch and argue when people tell you what you don't want to hear or what you don't think is right, makes you look really bad. I know flaming isn't allowed here but you are just being ridiculous and you need a reality check.

Wow dieseldale, just, wow............ I am only 17 years old and don't know a hell of alot about trucks and even I know you would be lucky to get 11MPG out of it with smaller tires and always driving downhill with a tail wind. My parents have a 3/4 ton 2wd '88 suburban with a Turbo 400 transmission and 14bff axle and a TBI 350 and it gets around 13 to 14 MPG average. There is no way in hell that your truck is going to get more than like 11 MPG with a tail wind and downhill if you stick a 454 in it. I'd be surprised if my 3/4 ton '63 GMC 4x4 with a 350, 4 speed, and 31'''s got 13 or 14MPG, hell I'd be happy if it got that good.

Heavy truck, and the key being truck, not even slightly aerodynamic, and big tires = crappy mileage for probably any engine you put in it except for maybe a diesel, and even then it wouldn't be anything to jump for joy over.

I understand that this is the newbie section and I have asked some things here myself, but this takes the cake. Grow up man, do a little reading before asking something like this, and don't bitch and argue when people tell you what you don't want to hear or what you don't think is right, makes you look really bad. I know flaming isn't allowed here but you are just being ridiculous and you need a reality check.

I love some good old fashioned Newb on Newb crime!!

Dane

well i was thinking about putting either a 454 or 427 in my truck, just wondering if anyone has any experince with these motors on the road,

truck will be running dana 60's with 38 or 39" tires , 4 speed standard.its got the aluminum transfer case too, cant think of the name.

its an 87 chev 1500 7" lift with 3" magnaflow dual exhaust.
350 and 35" MT baja claws, its actually comparable to my 09 cobalt and that gets 30 MPG. but i just want something a little more beastly. lol ....what should i expect for fuel milage?

you're trying to tell me you get 30mpg now.

I think I figured it out. I think he's figuring miles/kms per tank, and the truck obviously has a bigger tank than the Cobalt, so of course it's going to get the "same mileage"


BTW, my bone stock '99 Silverado with 5.3 got 16.x the one time I calculated it. (not towing or hauling)

Dammit, Urban. You beat me to the answer.:laughing:

Damn, just when I thought this thread had been buried, somebody digs it up.

I'm guessing 10 MPG. Downhill. With the engine off.

Damn, just when I thought this thread had been buried, somebody digs it up.

very true....but it makes for a good laugh....wonder where i can find me a carbed 454 that gets 20mpg:confused::shaking:

I'm guessing 10 MPG. Downhill. With the engine off.

On a trailer!! :laughing:

with a punk driving a honda rice burner pushin it

You'll never break 10mpg. Ever.

I've got a buddy who has something almost identical to what you're talking about, and it sits at his house 99% of the time because he gets 6mpg and can't afford to drive it.

Your getting 20mpg out of a small block on 35's isn't too likely either...I've got an S-10 with a TBI 5.7, D44's, and 35" rubber, and it gets about 15mpg on a good day. And its gutted, so your truck is probably a k heavier, at least?

this thread is 5 months old guys.

but 10MPG is the absolute best possible mileage you will ever see with that setup. a stock vortec 454 in our stock 96 suburban gets about 13MPG on the highway.