Reply
 
Thread Tools Display Modes
 
Old 06-08-2019, 07:07 PM   #1
Mini-Skoolie
 
Join Date: Sep 2018
Posts: 42
How would I get Cruise Control?

I want to install cruise control on my 2002 39ft 8.1L Gas V8 Bluebird.


I had to get gas since my mechanic (who is helping me move! now thats a real friend!) is not a diesel tech.


anyway. its a pig. 4mpg. the problem is the dang thing is freaking fast and you can't feel it. on the drive home I hit 75mph and never in a million years would have guessed. in fact I thought the speedometer was broken so while cruising along at 75mph I took out my phone to check my speed.


holy crap. it really was hauling along at 75mph. it felt like 50.


I want to keep it to 55mph for the 2000mile trip to save on fuel. cruise control would make that so much easier on something so deceptive regarding speed.


is that even possible? suggestions?
Nerys is offline   Reply With Quote
Old 06-10-2019, 01:43 PM   #2
Skoolie
 
WARGEAR's Avatar
 
Join Date: Mar 2018
Location: Fingerlakes region NY
Posts: 189
Year: 1999
Coachwork: AmTran/Wolfington
Chassis: 3800
Engine: International DT466E 190HP variant
Rated Cap: 72 pax 29500 GVWR
Cruise control retrofitting is possible. Some buses already have it somewhere in the controls. It might need to be activated in the ECU on yours. Look around for anything that might relate to a ďhigh idleĒ switch.

Not to sound like a nag, but youíve gotta adjust your driving habits to suit the vehicle and road conditions! I totally understand how you feel regarding speed and size relation with these vehicles. Going fast feels slower than it is. But in the end itís up to you to control your right foot, cruise control is a crutch! Haha

Gas school buses get notoriously worse fuel MPGa than diesel, but you may save on maintenance costs and parts in turn. Congrats on your bus and have fun with your build!
WARGEAR is offline   Reply With Quote
Old 06-10-2019, 02:31 PM   #3
Mini-Skoolie
 
Join Date: Sep 2018
Posts: 42
on the one hand I agree with you.


on the other hand it don't matter. When I make the trip it will literally be the third time I have ever driven the thing.


1st drove it home.


2nd will be once I get the tires and I take it down to SNJ to get them installed and have the mechanic once over the bus to make sure we are good


3rd time 2000 mile drive cross country.


$200 cruise control will be cheaper than the GAS I burn if I don't learn the accelerator in that time.


it takes time to "learn" a new vehicle especially one so different. if I drove this daily no doubt within a few weeks I would have the pedal feel and velocity feel of the vehicle down pat.


I can't afford to just "drive it around" to learn the feel of it. 4mpg.


so if I can toss $200 at it and save myself $300 or $400 in fuel. hell yes


every 0.1mpg up or down will cost me or save me $40!!! if I did the math right


though that begs the question. WHAT IS the fuel economy between 70mph and 55mph ? I don't even know. maybe its a minuscule difference.


anyone know?


its a 2002 496 V8
Nerys is offline   Reply With Quote
Old 06-10-2019, 02:51 PM   #4
Bus Nut
 
CMORGANSKOOL's Avatar
 
Join Date: Aug 2018
Location: Philadelpiha Pennsylvania
Posts: 340
Year: 2007
Coachwork: IC
Chassis: FE Bus
Engine: DT-466 7.6L Turbo Diesel
Rated Cap: 77
Saw an eagle manual trans bus with a lever attached to a door stop which presses the accelerator when pulled and locked to a position. "low tech manual cruise control" This could be a simple solution to your problem.
CMORGANSKOOL is offline   Reply With Quote
Old 06-10-2019, 03:26 PM   #5
Bus Geek
 
EastCoastCB's Avatar
 
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 18,253
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
Quote:
Originally Posted by Nerys View Post
on the one hand I agree with you.


on the other hand it don't matter. When I make the trip it will literally be the third time I have ever driven the thing.


1st drove it home.


2nd will be once I get the tires and I take it down to SNJ to get them installed and have the mechanic once over the bus to make sure we are good


3rd time 2000 mile drive cross country.


$200 cruise control will be cheaper than the GAS I burn if I don't learn the accelerator in that time.


it takes time to "learn" a new vehicle especially one so different. if I drove this daily no doubt within a few weeks I would have the pedal feel and velocity feel of the vehicle down pat.


I can't afford to just "drive it around" to learn the feel of it. 4mpg.


so if I can toss $200 at it and save myself $300 or $400 in fuel. hell yes


every 0.1mpg up or down will cost me or save me $40!!! if I did the math right


though that begs the question. WHAT IS the fuel economy between 70mph and 55mph ? I don't even know. maybe its a minuscule difference.


anyone know?


its a 2002 496 V8
My old gasser did 3 mpg. Par for the course man.
__________________
.
Roll Your Own Build Thread
EastCoastCB is offline   Reply With Quote
Old 06-10-2019, 03:34 PM   #6
Bus Crazy
 
Join Date: Jun 2013
Location: Picton,Ont, Can.
Posts: 1,713
Year: 1997
Coachwork: Bluebird
Chassis: GMC
Engine: Cat 3116
Rated Cap: 72
If you have a gasser just get a vaccum gage, run a hose from the vacuum system and mount the gage where you can constantly see it. Drive with a light foot and the highest reading possible when cruising
Cheap but increases mileage. Thee gage drops lower when your foot is in the throttle heavily.


John


edit: Add both cruise and the gage. watch the gage and then you will turn cruise to OFF. Poorer mileage when turned ON.
__________________
Question everything!
BlackJohn is offline   Reply With Quote
Old 06-10-2019, 03:37 PM   #7
Skoolie
 
WARGEAR's Avatar
 
Join Date: Mar 2018
Location: Fingerlakes region NY
Posts: 189
Year: 1999
Coachwork: AmTran/Wolfington
Chassis: 3800
Engine: International DT466E 190HP variant
Rated Cap: 72 pax 29500 GVWR
Youíre not going to get any better than 4-5 mpg with a gasser moving a 10 ton brick through the air. Cruise control is more of a creature comfort than a fuel boosting aid on this type of vehicle. It would save your ankle from getting sore, but isnít going to magically boost your mileage!
WARGEAR is offline   Reply With Quote
Old 06-10-2019, 03:44 PM   #8
Bus Crazy
 
Join Date: Feb 2012
Location: Salt Lake City Utah
Posts: 1,541
Year: 2000
Chassis: Blue Bird
Engine: ISC 8.3
Get the VIN and the make of the chassis. Call a commercial trucks dealer for that chassis make. Given the VIN, or model year and engine size, I suppose they'd be able to tell you whether it's likely your ECU has a built-in cruise control feature they could turn on, how much they'd charge for the service, and what accessory switches you might need to buy to control it. I'll guess it's likely that the ECU would have a cruise feature available.



As a DIY alternative you might look at aftermarket cruise control kits from Rostra. I nearly bought one of theirs.. but then I found out the ECM in my bus has a cruise control features and the switches were already in the dash; I just had to get the feature enabled.


Even if cruise control didn't save you any money at the gas pump, 2000 miles of highway or interstate is a long time to have to press the skinny pedal.
family wagon is offline   Reply With Quote
Old 06-10-2019, 03:58 PM   #9
Bus Nut
 
Join Date: Feb 2019
Location: New Hampshire
Posts: 445
Year: 1990
Coachwork: Thomas 4 window w/lift
Chassis: G30
Engine: 350 Chevy
Rated Cap: 10K
It would be a good feature to have on a long monotonous cross country trip, but if it can't be added now you'll have to get used to the speed "by fire", so to speak.
What did folks do in the days before C/C was introduced as an option?
They did what they had to do to get from point A to point B, and drove it!

Good luck doing what you're looking to do...
peteg59 is online now   Reply With Quote
Old 06-10-2019, 06:08 PM   #10
Bus Crazy
 
HazMatt's Avatar
 
Join Date: Oct 2017
Location: E Central Tejas
Posts: 1,997
Year: 1998
Coachwork: Thomas
Chassis: IH 3800, 8 window
Engine: T444E w/ Spicer 5-speed MT
Rated Cap: I prefer broad-brims hats
It's freakin' hyuuuuuuuu-ge!
Did you know that birds are fish? Is truth! When in flight, they're swimming thru the air. While air is an amalgam of gasses, it behaves very much like a fluid.
Walk thru a puddle a coupla inches depth, and then waist deep water. More difficult, right?
A vagrant breeze may feel delightful. Try facing into the winds spun off of an F-5 tornado. It'll send you a$$ over tea kettle.
Read on, MacDuff...

Quote:
Originally Posted by Nerys View Post
...
though that begs the question. WHAT IS the fuel economy between 70mph and 55mph ? I don't even know. maybe its a minuscule difference.
*It isn't!*

anyone know?
OK, I'll try to simplify a complicated situation as much as possible. Bear in mind, once past @ 30 mph, the majority of energy expended is spent overcoming wind resistance instead of rolling resistance.
Mathaphobics, feel free to skip foreward!
Short of using the tachometer (lowest comfy reading in highest gear), the equation to determine what forces are at play and their results while paddling your bus along, is:
Fd (drag force, in N)= Cd (drag coefficient) * 1/2 * p (fluid density [air=1.2 kg/cubic meter]) * V squared (flow velocity, m/s) * A (frontal area characteristic [height*width], meters squared)
Cd for a dolphin = 0.0036. An aircraft wing is 0.05. A standing person's is 1.0-1.3. A rectangular box,' 2.1. And a bus = 0.6 - 0.8.
Convert your speeds from miles/hour to meters/second (multiply mph by 0.447)
The faster you go, the more force is required to overcome the air resistance. Drag increases with speed squared. The power needed to push an object thru the air increases with the speed cubed.
In short, doubling the speed quadruples the power need for speed. The sweet spot for maximum fuel economy in most bus' ranges from approximately 45-55 mph.
Clear as mud..?
*
Creature comfort sure, but not entirely.
Maintaining a constant velocity, avoiding upward jags in acceleration, will aid in improving fuel economy, especially on long drives.
Quote:
Originally Posted by WARGEAR View Post
Youíre not going to get any better than 4-5 mpg with a gasser moving a 10 ton brick through the air. Cruise control is more of a creature comfort than a fuel boosting aid on this type of vehicle. It would save your ankle from getting sore, but isnít going to magically boost your mileage!

Nifty trick!
I don't reckon it'd work for a diesel..?
Quote:
Originally Posted by BlackJohn View Post
If you have a gasser just get a vaccum gage, run a hose from the vacuum system and mount the gage where you can constantly see it. Drive with a light foot and the highest reading possible when cruising
Cheap but increases mileage. Thee gage drops lower when your foot is in the throttle heavily.


John


edit: Add both cruise and the gage. watch the gage and then you will turn cruise to OFF. Poorer mileage when turned ON.
__________________
Those who say that it cannot be done should not interrupt the people doing it.
HazMatt is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 05:20 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.