Used lug drive tires can get up to 0. no use in mpg with a 454 IMO. Apparently a stock rebuild. « Reply 22 on:, 01:04:44 PM » i ran a 84 dually rclb withn 454/400 750 carb headers 2. I had an 83 Silverado with 305, automatic with lockup converter, and 3.
As you obviously well know, be careful with tow ratings. Gas engines had a 5-speed manual, except the H. The 7400 reigned for five years and equipped 26-foot U-Haul trucks in commercial applications and was the primary powertrain for GM line of trucks. manual 3 4 ton 454 fuel economy · Fuel economy of 7. If I had an OD trans and TPI or SFI I would be close to 20 mpg. · Vortec 454 fuel mileage.
Fuel Pressure is critical to the operation of a fuel injection system. Always check to insure that you have the proper fuel pressure. The engine uses eight cylinders to provide high-end torque and speeds. I get 14 mpg average,15 highway. I have an ’02 crew, 8 ft box, 8. Probly the best truck I have owned out of a 04 Duramax 4x4,85 1 ton.
I looked in the library and saw that the fuel consumption for a 454 Crusader running at 3,200 RPMs is listed at 14. The valve train has an overhead valve, ohv, configuration with two valves per cylinder. The Chevy 454 first hit the market in the 1970s.
1, Allison transmission, 4×4, 105,000 miles I may consider selling. The truck is equipped with a dump bed and snow plow. · I have some experience with a 99 3/4 ton suburban with a 454. A few years ago my dad swapped in a 5-speed stick (after going through 3 transmissions in less than 75,000 miles). The LE8 454 was the most common from 1973 to 1991.
· I recently bought adr 4x4 dually. Stock TBI 454 makes 230hp and 380tq so stock fuel pump is maxed out right off and a typical 454 will run better with a fuel pump upgrade even with stock chip. Ribbed tires on the drive axles provide 2–4% better fuel economy than lugged tires. Find the engine specs, MPG, transmission, wheels, weight, performance and more for the Chevrolet Silverado 2500HD Crew Cab LT 4WD. Pressure in the supply line will further. I don&39;t know what it gets for gas milage but I am going to find out. MPG Estimates from Others; MPG estimates from drivers like you!
A 15-passenger conversion was done by Stageway of Fort Smith, Ark. 1980s Chevy truck with 350 will mean a 3/4 ton truck. crusing close to 75.
How much fuel does a 454 Crusader burn? 3 L, Manual 3-spd Regular Gasoline:. The 3//4-speed trucks I&39;ve been around returned fuel economies in the teens stock with no special tuning. The 454 is a big-block carbureted engine found in most older model Chevrolet cars and trucks. Search by make for fuel efficient new and used cars and trucks. 3 L, Manual 5-spd Regular Gasoline: Not Available. It was a solid 6 mpg from the day it was bought new.
3-liter, which got a 4-speed. The L19 TBI, or throttle body injection, powered 1987 and later trucks as the second 454 engine option. it&39;s a 96 gmc 3/4 ton 4x4 extd cab short bed.
4 Tune up your vehicle. 189 Chevrolet Express 3500s have provided 3. The 454 and the 7400 The muscle car era was long gone when the 7400 series was developed. At this point, you should begin to hear that rocker arm ticking, slightly. 3 Adjust your idle speed to the lowest setting.
Each engine was available with either manual shift or an automatic transmission. Detailed features and specs for the Used 1990 Chevrolet C/K 3500 Series including fuel economy, transmission, warranty, engine type, cylinders, drivetrain and more. 1, better mileage.
Fuel pressure should be a constant 10 – 15 PSI on a TBI fuel injection system and is typically around 12 – 13 psi. 3 L, Manual 5-spd Regular Gasoline:. It will also increase wear & tear and fuel increase over the life span of the vehicle if you do a lot of non-towing driving. · 10 mpg loaded or empty is the best you will ever get. · Above 55 mph, each 1 mph increase in vehicle speed decreases fuel economy by 0. I have heard stories about those years not having the best brakes. 1998 Chevrolet Blazer 2WD 6 cyl, 4.
Most entry-level and moderately priced GM vehicles have engines tuned to run on regular gasoline with an octane rating of 87, to help users save money on fuel. Mine are 1983 model year. Used Car Label;. -based fleet manual 3 4 ton 454 fuel economy leasing and management company. 3 liter all run on regular 87 octane fuel. Good strong motor.
All my vehicles have a record of miles, economy, conditions, were driven to from, changes that affect performance at each fill up. Always a big complaint with 454 TBI trucks. it has a 454 vortec and 4l80e trans and 4:10 gears. When running at 3,150 I am doing 21. Chevy High Performance has covered the transplant of GM&39;s T56 six-speed manual transmission into early Chevys in several stories (see "Get Six," Sept. Two versions of the optional 454 were available in 1-ton Chevy trucks. 10 will make a dramatic difference in engine RPM which moves the torque rating higher at the same highway speed. For instance, GM&39;s Vortec 4300 4.
10 gears empty loaded with trailer empty or loaded with 6000 or so lbs a ton in the bed now between high way. The engine has multi-port fuel injection for induction of fuel. try loosening another 1/8 turn or so. Here&39;s what I have done in my 83 F250 4x4. The engine has a bore and stroke of 4. 90 and older is particularly bad and that is largely due to NO OVERDRIVE. I bought this 3/4 ton 4x4 chevy at 64,000 miles (all of which were used as a work truck). You dont buy a manual 3 4 ton 454 fuel economy 454 truck for gas mileage, you buy one because you need to pull and dont want a diesel.
&39;98, and "Get Six, Pt. 10 gears are great for economy compared to optional 5. The 7400 Vortec V-8 GM engine has 454-cubic inches and was rated at 290 horsepower at 4,000 rpm. · 3. Gasoline: Fuel Cost Per Gallon "Over the past 10 years, diesel has averaged nearly 14 cents more per gallon than unleaded gasoline," said Steve Jansen, truck services account executive, Donlen, a Northbrook, Ill. 4 Liters, 8 Cylinders, Automatic Transmission MPG City MPG: 12 MPG (U.
How to increase gas mileage on a Chevy 454 Eng? So did diesel trucks. How can I share my MPG?
10&39;s and a 4spd manual sm465 transmission. The engine runs an average of 10 to 15 mpg. 1978 GMC GMC Fuel Economy 1978 GMC GMC Pickup, 4 Venturis Carburetor, 7. 5 MPH and burning 21. The engine doesen&39;t seem to like over 3500 rpm&39;s and I took it to pull my race car, maybe 5500 lbs including the trailer.
1 mpg Worn tires provide better fuel economy than new tires, up to 7% better fuel economy. 5" exhaust, x pipe, 4 bl carb, RPM Air gap, manual 4 spd, no OD, 4x4 cam. A more potent variant of the 7. 10&39;s and one manual and 3. 1L Vortec V-8 specs, history, and horsepower and torque curves. 1L was introduced in and used in various heavy duty applications, including Chevrolet Silverado and GMC Sierra 2500/3500HD pickups, through the model year.
4L (454) powered 3/4 ton suburban What, 4. It has the 350 engine and auto tranny. It featured high torque but was also notable for poor fuel economy. We can help you calculate and track your fuel economy. Was getting about 5 miles per gallon.
The combination of larger bore and eight cylinders equates to very poor gas mileage. · Dropping from 3. Every 10 psi that a.
5 GPH if I did manual 3 4 ton 454 fuel economy my calculations right. If you’re thinking big block, go with the 496 8. After you loosen 3/4 turn. ok, a few more things about my truck. What is a 454 engine? 2 Remove your spark plugs using a spark plug socket wrench. · " The fuel requirements for the 454 engine at wideopen throttle are 25 gallons per hour at 2 PSI minimum and 3 PSI maximum.
0 million miles of real world fuel economy & MPG data. 4 mpg better than new lug tires. Read reviews, browse our car. Re: 454 dually gas mileage? Combined MPG: 15. Nothing is going to help that fuel mileage more than. This 305 was actually from GMCs medium-duty truck line. The motor was apparently rebuilt 7000 miles ago.
5" dually exhaust and ignition landed 13-14 on the freeway runing 65-70 with 235/85/16 and 4. By 1991, 3-speed automatics were gone; all were 4-speed. Dirty or poorly timed carburetors do not properly mix.
Using a 11/16 socket, back each rocker arm off about 3/4 turn, with engine at idle. Click here to view all the Chevrolet Silverado 2500 HDs currently participating in our fuel tracking program. Higher pressure than 15 psi indicates that there is an issue with the installation. If you do not keep this type of engine in tune, its gas mileage can lower by as much as 20 percent.
Refer to the Ford engine manual for the 5. Just keep it stock, stock tires and keep with maintenance. Go to diesel place forum, lots of GM info. One trip to central NY, towing a trailer the weighed about 4500lbs through hills, we averaged 7 mpg. Click here to view all the Chevrolet Express 3500s currently participating in our fuel tracking program. 4 liter engine is computer controlled and therefore needs specialized tuning that is only available from a certified Ford mechanic. The TBI 454 had fuel injectors in the middle of the throttle body that increased fuel efficiency, power and durability. Do one rocker arm at a time.
) 20 L/100km 5 km/liter 14 MPG (Imperial). Ran 89 miles and burned 178 gallons. 3 liter, Vortec 4800 4. Transmissions were a 3-speed and 4-speed manual, the automatic Powerglide, and the dual-range Hydramatic in the GMC models. 4 went into the 454 SS muscle truck, which was discontinued in 1994. As I recall, from 82 to about 86 or 87, the 1/2 ton Chevy/GMC could only be had with a 305.
· Here is an instant 2-3 MPG: Remove valve covers. If fuel line lengths or routings create a situation where this cannot be met, an electric pump should be added at the fuel tank to supply fuel to the mechanical pump on the engine. 3 cr, GT40P heads, dual 2.
How to Increase Gas Mileage on a Chevy 454 Eng 1 Replace your current air filter with a high-flow dry or oiled air filter. clean the egr vavle, run some seafoam through the intake to clean some of the carbon buildup out thats restricting flow, keep tires at right psi, ect. 8 liter and Vortec 5300 5. It had 410 torque at 3,200 rpm. 3 L, Manual 3-spd Regular Gasoline: Not Available.
4 liter V-8, and keep the engine tuned at its recommended intervals. My 38 Commander was repowered with 454&39;s. Find a fuel efficient vehicle that meets your needs. 2,145 Chevrolet Silverado 2500 HDs have provided 45.
How much horsepower does a 454 truck have? My &39;88 cc dually came factory with a 454/TH400 and 4.
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