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Technical => Driveline => Topic started by: johnxb351 on January 12, 2015, 06:17:22 AM

Title: CL 350 diff ratio
Post by: johnxb351 on January 12, 2015, 06:17:22 AM

hi all. can anybody tell me the diff ratio of a 1979  bedford  CL 350.     as am looking at buying a  CL 350 motorhome with a 253 and auto on duel fuel . anybody  got a idear on what fuel  it would use per 100km

Title: Re: CL 350 diff ratio
Post by: Sammy on January 12, 2015, 06:45:43 AM

my guess on the fuel would be unleaded and gas.

Title: Re: Cf 350 diff ratio
Post by: johnxb351 on January 12, 2015, 08:53:57 AM

Quote from: johnxb351 on January 12, 2015, 06:17:22 AM

hi all. can anybody tell me the diff ratio of a 1979  bedford  Cf 350.     as am looking at buying a  Cf 350 motorhome with a 253 and auto on duel fuel . anybody  got a idear on what fuel  it would use per 100km

Title: Re: CL 350 diff ratio
Post by: 6pac on January 12, 2015, 10:41:09 AM

Johnxb351,

The fuel consumption of the engine will depend on a few things, e.g. diff ratio, carby being used or injection, type of fuel.

There have been many discussion on this forums of what consumption people are getting from their vans. Have a search and you will find them. Here is one:

http://www.buga.com.au/index.php?topic=8174.0

Regards

Rhett

Title: Re: CL 350 diff ratio
Post by: Dano on January 13, 2015, 01:24:43 AM

I think I only got about three hundred click to the tank....but the GPS decided to sh*&t itself in the last 50, but still..

I do admit to being most of the problem here....lol

Title: Re: CL 350 diff ratio
Post by: IWander on January 15, 2015, 10:00:15 PM

Hi johnxb351. My statesman had a 308 with quadrajet carby, on gas 80 ltr tank. So 64 litre gas fill. (ie 80% of total tank size.)

I would average 300 K's to 350 Klms per tank depending on a couple of factors. How hard I drove, how heavy a load & highway or city.

So much the same weight ratio as you(?) & that equated to about 5 to 7 Klms / Ltr.(from memory)? :)

Title: Re: CL 350 diff ratio
Post by: johnxb351 on January 16, 2015, 01:05:29 PM

Thanks   IWANDER and all who replie to my post.  am thinking it would be closer to 5 kms per LTR to take in acount of  wind drag as the motor home is so high.  i am still looking around for one. the one i was looking at  with the 253 .they wanted $12.500 for it.  bit rich i though as i see the 6cyls on ebay go for half the price

Title: Re: CL 350 diff ratio
Post by: IWander on January 21, 2015, 07:01:53 PM

Yep, you are right there. The height & side panels act like massive parachutes. Plus on the highways, semi's going the other way can kill 10 KPH with the pressure wave... especially if you are going up hill.

253's rev higher than 308's to get into their torque range. So I would think about 5K/L is right, maybe even a bit high to be honest.

If the one your thinking of buying is a manufactured unit + fitout you'd think they were designed to carry the box, buy if its a home made campervan it could be really heavy & made with 20 to 25mm RHS. (Rolled Hollow Steel).

I put a second tank on my tray truck+ petrol tank to get the extra distance. I think it carries 80, 110 ( about 140 odd litres full of gas ) plus 55 of petrol, so I start looking for fuel at 1000 K or so. But I have the standard CF diff & it is SLOOOOOOWWWWWWWWWWwwwwww.


Going over Cunninghams gap or the Towoomba terror can drop me into first gear to get up the hills, if I have a load on board.
And with a top speed of about 97 Kph at full noise is not a fun trip.
Maybe I try to load too much on board.(hehe)

Title: Re: CL 350 diff ratio
Post by: ben on January 25, 2015, 10:04:44 AM

from memory the cfl duel wheel diffs are either 5.2:1 or 4.2:1  mostly 5.2:1 in my experience.

ben

Title: Re: CL 350 diff ratio
Post by: IWander on January 25, 2015, 06:25:50 PM

Thanks Ben. I dont want to highjack the thread, but do you mind me asking how I might find out what the ratio is? Is there a stamp or tag on the housing or something?

Title: Re: CL 350 diff ratio
Post by: rumax on January 25, 2015, 07:00:35 PM

yes there is, but it's easier to jack up a wheel ( a rear one works better...  ;) ;D ;D )and count the number of rotations of the wheel compared to the tailshaft.. and multiply by 2, as there are 2 wheels the tailshaft is turning.
For more info, use the search engine and look what has been posted before. Most have been there re diffs, as the standard ratio is crap for Australia/NZ.