Best speed for towing

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bayryans
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Joined: Sat Jul 02, 2011 8:43 pm

Best speed for towing

Post by bayryans » Thu Aug 04, 2011 4:58 pm

Hello fellow travellers,

Being new to caravan travel i was wondering if any one could give me a idea as to what MPG, or Lts per 100km i may expect from my car.
I have a 2008 FG falcon sedan 5 speed auto sedan, and i will be towing a 14ft 6inch jayco poptop. Had the van weighed on the weighbridge. Total weight fully loaded 1250kg.
Possible travel speed will be between 90-100 kph depending on your advice. We will be travelling from qld to sa and return.
Many thamks

Peter
BAYRYANS
URANGAN.QLD
FG FALCON (power unit)
16ft Jayco Destiny

hillbilly123
Posts: 2033
Joined: Sun Jul 26, 2009 4:52 pm
Location: Near Brisbane

Re: Best speed for towing

Post by hillbilly123 » Thu Aug 04, 2011 9:07 pm

Depends on whether you want to see the country or see how far you can get each day.

Also its not how fast you can go but how fast you can stop the thing in a hurry if you need to.

(Blowout or similar comes to mind)

We travelled at 85-90kph and tried to keep out of the speed merchants way.
Get much above that and fuel consumption soars, even in a diesel.

bayryans
Posts: 29
Joined: Sat Jul 02, 2011 8:43 pm

Re: Best speed for towing

Post by bayryans » Thu Aug 04, 2011 9:14 pm

Hillbilly,

What i was trying to find out is the most economical speed for my car and van. I dont want to use a lot of fuel, but i dont want to sit on 85kph if i can cruise a few kph more.

Peter
BAYRYANS
URANGAN.QLD
FG FALCON (power unit)
16ft Jayco Destiny

Titch
Posts: 213
Joined: Sat Apr 30, 2011 7:56 pm
Location: Sth East Melbourne

Re: Best speed for towing

Post by Titch » Thu Aug 04, 2011 9:17 pm

Being a Falcon you may be limited to a speed anyway.
Ours did a while back.
Read your Owners manual.
They use to be speed restricted to weight towed.
Other brands may have the same stipulations as well.
Cheers.
Titch

hawkie
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Joined: Wed Dec 23, 2009 10:38 pm
Location: Adelaide

Re: Best speed for towing

Post by hawkie » Thu Aug 04, 2011 9:51 pm

upto 1200kg ford allow 100k over that it drops as weight goes up.

I have found that cruising at freeway speed 110k is the most economical for our little camper trailer, 2,200rpm @ 11l/100k averge, slower sections with hills upto 14l/100k, at lower speeds the revs come up as the torqe converter unlocks and any hills results in kick down

I think a larger van with higher wind resistance will need to travel a little slower, around the 90k to 100k

Do you have a trip computer that records fuel usage as you drive?
Sig can be done

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Tyne'e
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Re: Best speed for towing

Post by Tyne'e » Thu Aug 04, 2011 10:32 pm

Our first van was a 17'6" viscount legal at about 1500 kg. We had an AU3 Falcon and used to get about 500 k from a tank on about 90k.
Like someone said its not how fast you can go its about how fast you can stop.
Im not sure if your van is single or duel axel but I know single axles can get a bit of a wobble up behind a sedan if the speed gets up. Someone will probably tell me Im wrong but thats my experience anyway.
Reading back I'm guessing single axle.
Pajero DID, Jayco Heritage 21.5 ft
http://www.mechanisedswaggies.com

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Frank & Brenda
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Location: Aldinga Beach SA (in the Fleurieu peninsula)12 Mistubishi Triton, 1996 J-co DISCOVERY 18' poptop

Re: Best speed for towing

Post by Frank & Brenda » Fri Aug 05, 2011 8:23 am

G'day Peter,
I have not towed with a Ford but have had a Commodore as a tug, now we have a mister bichi Challeger (99 petrol/gas) and with both vehicles we found that the most economical towing speed is 85-90kph anything above that and the fuel needle drops very fast.
We did trials and at 85-90kph we get around 290km out of a tank (65lt) of LPG, at 90-95 that dropped the mileage by 10-15%, at 95-100 we dropped to 230km to the tank.
Hope that helps.
Frank

Snugglers
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Joined: Mon Feb 07, 2011 2:25 pm
Location: St Georges Basin, NSW

Re: Best speed for towing

Post by Snugglers » Fri Aug 05, 2011 11:20 am

On our recent trip to the Gold Coast, Ford Terrotory with 4 sp box and a Coromal F616 weighing in at 1850kg fully loaded (water tanks full, clothes, food, bikes, Kayak and surfboard on the roof of the car), did a bit of experimenting. On the way up I sat on 90-100 only using 4th(O/D) on the down hill bits and with Cruise Control on for much of it, I got about 20.5 Lt/100km, Not so good!
On the way home I flicked the cruise control off and used manual sports shift, much better at an average of 19.0 lt/100km still sitting between 90 and 100km/hr.
I have also found not only towing the van, but just in general, I get much better returns using 95 octane, normal for me is 11.9-12.0 per 100km and 22.5lt/100km towing the van using E10 or normal unleaded, with 95 octane I got the above figures (19-20 Lt/100Km) towing and around town day to day I get 10.9-11.1 per 100km.
Did the sums on cost difference and it does save a little each year (about $25) but has the added benefits of more power and a cleaner burn, better for the car.
Hope that helps :D
Regards and safe travels
"Snugglers"

Mike H
Posts: 479
Joined: Mon Mar 08, 2010 9:28 am
Location: Perth

Re: Best speed for towing

Post by Mike H » Fri Aug 05, 2011 12:35 pm

bayryans wrote:Hello fellow travellers,

Being new to caravan travel i was wondering if any one could give me a idea as to what MPG, or Lts per 100km i may expect from my car.
I have a 2008 FG falcon sedan 5 speed auto sedan, and i will be towing a 14ft 6inch jayco poptop. Had the van weighed on the weighbridge. Total weight fully loaded 1250kg.
Possible travel speed will be between 90-100 kph depending on your advice. We will be travelling from qld to sa and return.
Many thamks

Peter
I've towed my van with two vehicles - V8 Holden Caprice and V6 Kia Sorento.

Maximum towing speed in WA is 100 km/h and I normally sit about 5km/h below this figure.

On average, I would say that the economy of both vehicles would be halved when towing - both cars would achieve normally close to 10L/100km on the open road and closer to 20L/100km when towing.

When both cars towed our previous van (Jayco Swan camper), the economy dropped by approx. 50% to around 15L/100km at or about 95 km/h.

In our situation, dropping 5-10km/h made very little difference to economy.

Cheers.



Mike
2008 Holden Caprice V8 towing
2010 Jayco Expanda 16.49-1

krusty
Posts: 614
Joined: Sun Feb 28, 2010 8:42 pm

Re: Best speed for towing

Post by krusty » Fri Aug 05, 2011 8:46 pm

van; light (under 1800)
tow; nissan 2001 3litre
normal 11.6l/100km
tow 16.5l/100km
speed legal mostly
(less on poor roads, occasional over the limit, legal problem not tow, cruise on level, 'gut feeling' when on hills has me backing off)
over taken but trucks (illegally cause i was limit); passed the other way at 220.

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