Reply
 
Thread Tools Display Modes
 
Old 04-14-2019, 12:38 AM   #1
Bus Nut
 
Join Date: Jan 2016
Posts: 252
Top speed for you top heavy dudes and dudettes

A few people have mentioned being able to cruise at 80 mph with the right drive train. For those of you who have raised your roofs to 12-13 ft, how fast do you DARE go? How stable does your skoolie feel at high speeds with crosswinds, etc?
pengyou is offline   Reply With Quote
Old 04-14-2019, 06:30 AM   #2
Bus Geek
 
EastCoastCB's Avatar
 
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 17,780
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
Quote:
Originally Posted by pengyou View Post
A few people have mentioned being able to cruise at 80 mph with the right drive train. For those of you who have raised your roofs to 12-13 ft, how fast do you DARE go? How stable does your skoolie feel at high speeds with crosswinds, etc?
I raised the roof on our first bus 10".
It didn't feel any different than before honestly. But that's a mild roof raise. We're sensible folks. A little goes a long way.
__________________
.
Roll Your Own Build Thread
EastCoastCB is offline   Reply With Quote
Old 04-14-2019, 11:29 AM   #3
Bus Nut
 
Mountain Gnome's Avatar
 
Join Date: Oct 2017
Posts: 382
Year: 1999
Coachwork: BlueBird
Chassis: TC1000 HandyBus
Engine: 5.9L 24V-L6 Cummins ISB
Rated Cap: 26 foot
My old 1984 Nissan Pickup was the Baha Champ that year (1984-1986 actually - then they changed to the Hardbody design). I used to love racing it on gravel roads. I had oversized (3110.50R15) MT or AT BFGs which raised the truck. I could beat anyone except my friend with a 1973 Honda Civic with a 1978 Honda Accord 1.8L CVCC engine dropped in, Weber carb, headers, the wider Accord rims and tires, wider Accord lower control arms, and taller Accord rear struts with the springs cut (they were too tall at stock) that jacked his back-end up 2"-3".


When I put a fiberglass high-top camper-top on the truck-bed (slimline design, not the full-out stand up inside kind) which raised the height 3" over the cab in the rear, I could feel the truck want to roll if I took corners hard. I can lift it alone - it's not that heavy I took that thing off, since it added some serious blindspots also.


Then I later raised my suspension 1.5" for better clearance offroad (aftermarket torsion bars and longer heavy-duty rear shackles) and my racing days were over. No more hard turns. But offroad was so smooth!
Mountain Gnome is offline   Reply With Quote
Old 04-14-2019, 01:10 PM   #4
Skoolie
 
geminusprime's Avatar
 
Join Date: Dec 2018
Location: Rock Hill, SC
Posts: 238
Year: 1997
Coachwork: International
Chassis: Vista 3600
Engine: DT466E / AT545
Rated Cap: 72
I don't feel safe driving 80mph in anything as big as a semi/skoolie at all. Biggest reason I never went OTR is because I knew it was a LOT of weight traveling VERY FAST, at least regional routes were a bit slower paced IMO.

At 80MPH in, say, a 20,000lb vehicle in optimal conditions and assuming instant reaction time, you're looking at a 1000+ feet stopping distance. That's more than a fully loaded semi trucks stopping distance at the same speed, and I'm just not comfortable with that in a relatively lightweight skoolie.


Now all that being said, I assume you mean aerodynamic forces reducing speed or causing vehicle instability. No experience with a high top lifted roof skoolie, but drove a few flat nose cabs with a high top trailer, essentially a brick in the wind. You WILL feel the sidewinds and may have to be a bit more cautious about driving in extremely high winds, but otherwise just keep both hands on the wheel and you'll be fine. Despite the high top on a lifted roof skoolie, it doesn't really effect the center of gravity unless you load a lot of weight on the roof, or place holding tanks up there.


My regional route took me more through mountains so it was more wind and winding roads, less speed. But out on the plains I'd have to push 70-75 to just keep up with traffic (Colorado, this would be DEN to East CO). Never had to pull over, never had any close calls due to the winds, I wasn't comfortable driving those speeds but I rarely did those routes, and this was in a vehicle with a much higher center of gravity than a lifted roof skoolie.


Overall, I'd suggest not pushing it over 80MPH and try staying below 65MPH in extreme winds, but otherwise just look out for bridges and you should be fine.
geminusprime is online now   Reply With Quote
Old 04-14-2019, 01:53 PM   #5
Bus Crazy
 
Join Date: May 2016
Location: Georgia
Posts: 1,450
Year: 2001
Coachwork: Blue Bird
Chassis: IH
Engine: T444E
Rated Cap: 14
As a professional truck driver, I only felt comfortable running 80 when it was "safe" to do so. In my view, when I could do so without following too closely and could maintain a safe space cushion around me.


I've also had my share of top heavy loads. I think the most memorable one was a 20' container loaded with hydraulic cylinders. The floor of those is like 5' off the pavement, and this one was loaded to the roof. I could feel how top heavy it was, and took curves/turns accordingly. I arrived safely, and would have felt safe crossing the country with it (even at 80 on the straights).
Brad_SwiftFur 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 06:38 PM.


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