Community Forums

SergioP · 01-24-2023, 11:25 AM

You can get 10% better mpg using ethanol free fuel. But it costs about $1.20-1.50 more a gallon.

Onyrlef · 01-24-2023, 11:26 AM

Quote:

Originally Posted by ChrisDParise

The general consensus is you can't improve the mpg enough to justify add on products.

An exception is tuners. There's very convincing evidence on the tuners websites and some anecdotal evidence the tuners will yield small improvements in mpg. Mpg is greatly reduced the faster you go, so slowing down and driving at a steady speed is a proven recipe for improving mpg.

A side benefit beyond changing shiftponts to improve driveability of products like the 5 Star and Banks tuners is slightly better mpg - which you previously said you've read all about. Other than a tuner and slowing down the other add on products are questionable in benefits offered.

" Small" I'm guessing is operative. Drag is the overwhelming enemy of fuel efficiency in the flats, less so when climbing and I suppose for those short accelerations and decelerations is where tuning could make a difference. When I raced road bikes a hundred years ago, you tucked in on a wheel in the flats to reduce drag ( riding 6" off another guys rear wheel reduced drag by ~ 30%). When climbing the practical effect of drafting was down to about 3%, weight was everything. Climbing, consequently, is largely an individual effort. That 170 lb. stocky guy winning the sprints at the end of a flat stage race is usually going to get dropped on a mountain stage where his objective is just finishing in time to stay in the race. The 120 lb Columbian on a 14lb. carbon fiber road rocket is going to be back at the team bus celebrating long before the heavier guys get across the line.

Rockwood27 · 01-24-2023, 01:16 PM

Quote:

Originally Posted by SergioP

You can get 10% better mpg using ethanol free fuel. But it costs about $1.20-1.50 more a gallon.

In my neighborhood, that would be around a 35%-40% increase in gasoline price. It sure outweighs a 10% increase in mpg.

Sent from my SM-A515U using iRV2 - RV Forum mobile app

1Hurricane · 01-24-2023, 05:06 PM

I was reading over some of your threads and gas prices and driving into the wind has a affect on your vehicle. Talking to truckers they use air dams on there front bumpers and put disks on there tire rimes also side skirts with rear end trailer defusers, all this does help MPG... aerodynamics ...

1Hurricane · 01-26-2023, 08:44 PM

Quote:

Originally Posted by Beau388

Assuming you have a restrictive,
hot air intake and replace it with a K& N intake, you are going to increase the usable oxygen in the air at 3/4 throttle and above. At part throttle the engine has all the air it can use. More oxygen means the engines computer will add more fuel to keep the engine at the desired fuel/air ratio.
Unless you have a carburetor instead of sequential fuel injection, putting more air into the engine will result in more power and more fuel usage. In the case of a carburetor, it tends to run rich when the air intake is restricted. Removing the air cleaner and piping in cold air will lean out the engine and result in beater fuel mileage.
With a computer controlled fuel injection engine the computer manages the fuel/air radio regardless of what you do the the intake or exhaust.

Governmental corporate fuel mileage restrictions cause the engine manufacturers to squeeze every hundredth of a mile/gallon out of each tankful of fuel. They even discount the purchase price of high fuel mileage vehicles in order to produce desirable gas guzzlers vehicles and still keep the corporate fuel mileage above the required minimum.
Yes you buy a tuner or chip (in older vehicles) that use different fuel/air ratio tables and different ignition advance tab , but all will give more power and use more fuel and usually get poorer fuel mileage.
Your left foot is the only cheap, readily available device to increase your fuel mileage.

I just need to say something to you. Most of your comments are like, listen to me, I guess you try to tell us you know allot. This is not my first rodeo, I have owned 5 coaches and I have improved MPG on each coach. I thought some of you guys my have upgraded your rig with aftermarket products that made a improved MPG, That is my quest...

yeloduster · 01-27-2023, 06:27 AM

Quote:

Originally Posted by 1Hurricane

This is not my first rodeo, I have owned 5 coaches and I have improved MPG on each coach. I thought some of you guys my have upgraded your rig with aftermarket products that made a improved MPG, That is my quest...

1Hurricane,

We thought you were seriously looking for answers. You got serious answers from people who have been there and done that!

However, it is starting to sound like you are not seeking answers, you are just stirring the pot!

Quoted above you say, "This is not my first rodeo, I have owned 5 coaches and I have improved MPG on each coach."

I think you should share your vast knowledge with us. Then we can all get better performance and fuel economy!

ChrisDParise · 01-27-2023, 07:03 AM

Quote:

Originally Posted by 1Hurricane

I have owned 5 coaches and I have improved MPG on each coach:

You've been holding out on us Hurricane. Either that or the weather forecast is very windy indeed

Beau388 · 01-27-2023, 08:07 AM

Quote:

Originally Posted by 1Hurricane

I just need to say something to you. Most of your comments are like, listen to me, I guess you try to tell us you know allot. This is not my first rodeo, I have owned 5 coaches and I have improved MPG on each coach. I thought some of you guys my have upgraded your rig with aftermarket products that made a improved MPG, That is my quest...

I would be interested to know what you did to the engine in a modern computer controlled. sequential injected engine to improve its efficiency. The only ways I know are to increase the compression, increase the engines temperature and decrease the displacement.
The easiest and cheapest ways to increase fuel mileage in a modern motor coach is to decrease the weight and reduce the friction (mechanical and aerodynamic).

1Hurricane · 01-27-2023, 08:53 PM

Quote:

Originally Posted by yeloduster

1Hurricane,

We thought you were seriously looking for answers. You got serious answers from people who have been there and done that!

However, it is starting to sound like you are not seeking answers, you are just stirring the pot!

Quoted above you say, "This is not my first rodeo, I have owned 5 coaches and I have improved MPG on each coach."

I think you should share your vast knowledge with us. Then we can all get better performance and fuel economy!

Thanks for your input, my 1st RV was very similar to yours, Allegro workhorse, cold air intake, headers, duel exhaust, high performance mufflers, went from 8-9 to 12, best ever 14 MPG, no toad. 2nd RV Coachman V10 same upgrade as 1st rig, on average 12 MPG. 3rd RV Pleasure Way V10, cold air intake changed spark plugs to Bosch plugs, Gibson exhaust system, Diablo tuner. really ran great, average 14 MPG. 4th RV Mercedes Benz V6 turbo diesel. I just installed a K&N filter, 16 to 18 MPG. 5th RV Thor Hurricane34R. No upgrades yet. Spending time doing after market products research. Listening to all the suggestions and considering them in my decisions to find the best product for my application, And the weather is great...

yeloduster · 01-29-2023, 07:04 AM

Quote:

Originally Posted by 1Hurricane

Thanks for your input, my 1st RV was very mimilar to yours, Allegro workhorse, cold air intake, headers, duel exhaust, High Performance mufflers, went from 8-9 to 12, best ever 14 MPG, no toad.

Hurricane1, I'm disappointed! I've done the much of the things to my 2003 8.1L W20 chassis that you did to your Allegro! I Have Headers, 3" Dual Exhaust, Cold Air Intake, high performance mufflers AND a UltraRv tune. I'm still stuck at 7.1 MPG! Possibly it is because you have DUEL EXHAUST and I have DUAL EXHAUST!? But I don't think that is it!

You must be holding out on us! You haven't revealed the SPECIAL SAUCE that allows you to get 50-100% better fuel economy than the rest of us!

1Hurricane · 01-29-2023, 11:38 AM

Quote:

Originally Posted by yeloduster

Hurricane1, I'm disappointed! I've done the much of the things to my 2003 8.1L W20 chassis that you did to your Allegro! I Have Headers, 3" Dual Exhaust, Cold Air Intake, high performance mufflers AND a UltraRv tune. I'm still stuck at 7.1 MPG! Possibly it is because you have DUEL EXHAUST and I have DUAL EXHAUST!? But I don't think that is it!

You must be holding out on us! You haven't revealed the SPECIAL SAUCE that allows you to get 50-100% better fuel economy than the rest of us!

Well man, what can I say, you wanted to know my upgrade modifications, and that's it, no special sauce...sorry your stuck at 7.1...Just to let you know that I run mostly between 60 and 65 mph and try to keep a steady speed. Do not use cruise control very much, only on flat hwys.

1Hurricane · 02-02-2023, 08:17 PM

Quote:

Originally Posted by SergioP

Here I found what you need. Says save up to 35% fuel consumption. $50, how can you go wrong?

https://fuelsavespro.store/?gclid=Cj...waArrNEALw_wcB

Have you installed this CHIP? With your experience and expertise I would like to here your response.

1Hurricane · 02-04-2023, 06:29 PM

Quote:

Originally Posted by Rockwood27

In my neighborhood, that would be around a 35%-40% increase in gasoline price. It sure outweighs a 10% increase in mpg.

Sent from my SM-A515U using iRV2 - RV Forum mobile app

Thanks for the heads up.I am glade you saw that...

1Hurricane · 02-05-2023, 08:50 PM

cold air intake, alot to chose from, S&B, ROTO-FAB, JLT, VOLANT MAX FLOW, FLOWMASTER DELTA FORCE, SPECTRA PERFORMANCE, K&N, ROUSH, CORSA, aFe Momentum Pro 5, AEM, HALLTECH KILLER BEE MF103, SIKKY, , LSP, DINAN, BBK, TRICK FLOW, BANKS POWER, STEEDA, IJEN, COBB , INJEN, AIRAID, DIABLO, AF DYNAMICS, ARES...NOW I NEED TO PICK OUT ONE FOR MY RIG.. Any suggestions...