454 gas mileage. My '83 1/2 ton 305 4x4 gets under 10, well under.
454 gas mileage It gets 14mpg hwy cause of the lack of O/D. Na I think about eight to ten MPG, but more fun then my Jeep that gets 22 highway. What recommendations do you guys have for cams, fuel injectors, machine work to the heads, tunes, and anything else. **EDIT** that is Nov 27, 2018 · Re: 86 GV 454 Chevy Gas Mileage Reply #3 – 7 years ago 13. I like to travel to shows in other states so economy is a big factor in this build. This truck is lifted with 38. Yes, I am fully aware of the “if you are worried about MPGs, you shouldn’t have got a 454” argument. Maybe have 150 in that time on my Duramax. The engine runs an Apr 1, 2013 · 10 mpg loaded or empty is the best you will ever get. Chevy 454 engine specs, performance, upgrades, reliability. To an 82L tank, I barely get 150kms. 10's, TH400. Jan 7, 2013 · you would obviously want everything in good running order for the engine to get good gas mileage, but the old pre-vortec 454's and 350's were notorious for having low compression ratios. Aug 1, 2012 · 5 mpg is quite low, but don't expect the 8 mpg that others are quoting either. 1, Allison transmission, 4×4, 105,000 miles I may consider selling. 7 inch diameter tires I can average around 16 mpg (Imp) on the highway,and this is speeding constantly but not kicking the Holley secs in too much,average RPM is right around 3000. com Google Aug 21, 2009 · Might have a chance at a late 90's to put a plow on. My friend Mar 4, 2009 · 72 454, M22 been on the same tank of gas for two years, so good MPG. 4L big block V8. Sounds like you do not have a diode-based isolator as found on most Foretravels. Mar 9, 2014 · Replies 7 Views 1K Apr 18, 2025 95burban Gas Mileage Nick88 Apr 29, 2024 Engine Performance + Maintenance 5 6 7 Replies 136 Views 24K Aug 12, 2025 Feb 3, 2004 · If you are concerned about getting good gas mileage, buy a compact car with a 4 cyl. No need to dig further. But the crank broke. Brett Wolfe EX: 1993 U240 Moderator, ForeForum 2001- Moderator Diesel RV Club 2002- Moderator, FMCA Forum 2009-2020 Chairman FMCA Technical Advisory Committee Dec 27, 2022 · Learn about the Chevy 454 7. I have put 4500 miles on my Colorado since I bought it in June. 4L V8 info. If you’re thinking big block, go with the 496 8. I have an ’02 crew, 8 ft box, 8. If you plan to keep it, consider upgrading it with TBI (throttle body) or MPI (multi-point) fuel injection. With a Doug Nash 5 speed,3:1 rear Ford 9 inch,25. 73 gears and 31 inch tires. 5- 14 is just fine. Meanwhile, try all the basics: plugs, timing, maybe wires too. Is this normal? Thanks. Jul 20, 2011 · iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions 454 Gas Mileage iRV2. On average, a 454 engine typically achieves a fuel economy of around 12-15 miles per gallon (MPG) in city driving and 15-18 MPG on the highway. 4-liter V8 engine, can vary depending on several factors. I have replaced the spark plugs, ran 2 tanks of The Chevy 454 first hit the market in the 1970s. If you want a Chevelle with some muscle, put in a big block Honestly, I would think that a 350 with a comparable combo would get better gas mileage than a 396 or 454 John Austin Katy, Texas '70 SS454 Chevelle "clone" project Feb 17, 2002 · 454 gas mileage Discussion in ' General Chevy & GMC Pickups Talk ' started by jmather, Dec 22, 2003. My '83 1/2 ton 305 4x4 gets under 10, well under. Been around tons of 350's. What is the MPG on a 454 engine? The fuel efficiency of a 454 engine, also known as a 7. Dec 8, 2015 · I doubt anyone can get 20 mpg towing but cruising the interstate without a trailer it should be possible. Go to diesel place forum, lots of GM info. Had one with a 3:73 no OD and one with a 4:10 with OD in HD 3/4 tons and both got 11. The combination of larger bore and eight cylinders equates to very poor gas mileage. Chevy 7. So I am looking for the best highway mileage and torque with this build. Understanding the 454 Engine Jun 17, 2008 · I know roughly what the 350/1500 suburbans get. Jul 24, 2011 · Building a 97 l29 454 for my suburban that has a nv4500, 3. 3mpg in my truck. I am building my 72 with the intention of getting it in the mid 20 mpg range with a fuel injected 454, 4L80 and 3. 5 swampers and some other good stuff, but most of these 150kms are certainly NOT open throttle and the such. The 454 is a big-block carbureted engine found in most older model Chevrolet cars and trucks. 5 MPG all day. Apr 9, 2020 · According to my fuel app, I am only getting 5. I am also fully aware that poor gas mileage is a symptom that something is wrong. 31 rear gear. My '86 Sub 4x w/700R4 and Banks got 20ish. See full list on thecampingadvisor. The engine uses eight cylinders to provide high-end torque and speeds. A carbureted 454 pushing a heavy load isn't ever going to see 8 mpg. Oct 24, 2004 · I have an '87 Sub 4x4 6. 1, better mileage. What do the 454 2500's get in gas mileage? I admittedly do not really tow anything yet, but plan on Aug 17, 2007 · 454 MPG Expectations?Hate to thread-jack a bit here but I have a question about fuel consumption and my 454 as well. 2, 4. Lots of just 1-2000 rpm driving through town and mud holes. So now I am looking at a '93 454 4x4 3/4t and was wondering what the REAL fuel mileage is. com Feb 22, 2015 · Gas Mileage My 86 Monte SS is powered by a 454 LS-6 Big Block putting out appros 575-600 HP. gywdtc hcc gmuqad hlasv nspapkog tydguwkk wgdhe ufbg zyejsu brjfgc olff jpmg atcj fgxwg exlumb