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  #709  
Old 03-20-2014, 01:27 AM
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Gr8ness, That's correct. The controller sends a small initial voltage to the brakes when you touch the brake pedal. Using mine as an example, it sends about 0.7v when at rest. Assuming you were to do the same in a steady state of motion (not decelerating), you would expect a similar result. That equates to very little, if any braking force. Of course, the initial voltage would vary, depending on your setup and boost setting. You might just be able to hear the magnets buzzing in the drums if you're standing next to them.
The controller normally sends a very small amount of power through the line in order to detect open circuit in the brake wiring.
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  #710  
Old 03-20-2014, 01:30 AM
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Re: The Towing thread

BobT,

More good info. I am happy that I have it clear in my head now how the proportional controllers work at a concept level. Without doubt, I have learnt yet more from this forum.

When my Jeep eventually arrives I will personally fit a proportional controller (P3), probably to the cubby in the centre console.

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  #711  
Old 03-20-2014, 01:34 AM
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Quote:
Originally Posted by Gr8Ness View Post
BobT, More good info. I am happy that I have it clear in my head now how the proportional controllers work at a concept level. Without doubt, I have learnt yet more from this forum. When my Jeep eventually arrives I will personally fit a proportional controller (P3), probably to the cubby in the centre console. Gr8Ness
Hi bob I have a P3 controller fitted on my GC no problems works well they mounted it on the side just under the light switch as I still use the connections on the caddy
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  #712  
Old 03-20-2014, 01:50 AM
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Re: The Towing thread

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The controller normally sends a very small amount of power through the line in order to detect open circuit in the brake wiring.
Again. It makes sense. Clearly not rocket science as I am beginning to understand.

Just enough to be dangerous?
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  #713  
Old 03-20-2014, 02:46 AM
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Re: The Towing thread

This is a good explanation of the differences between a proportional (P2, P3 etc) and a non-proportional (Redarc)

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  #714  
Old 03-20-2014, 06:59 AM
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Re: The Towing thread

A different question re towing.
The other day I was towing our 3 ton van at 80/85kph on the flat; no wind. In drive or sport mode it obstinately stayed in 7th gear; at about 14 litres per hundred indicated. Yet if I manually forced it to 8th gear it still pulled happily and the consumption dropped to about 10 l/100.

Do I risk damaging the engine but pushing it to 8th gear? (Whenever a hill appeared I dropped back to sport mode and let it decide the gear.)

Is there a way to persuade it to use 8th when in drive or sport mode? (Apart from flooring it and hitting over 100kmh ).

Thanks
Phil
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  #715  
Old 03-20-2014, 07:56 AM
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Re: The Towing thread

Sport mode at 80/85km/h will always be 7th, that is what Sport mode does, holds the gear longer before upshift; this is the same when not towing.

Keep an eye on trans temp when in Drive and making it upshift to 8th.
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  #716  
Old 03-20-2014, 09:13 PM
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Re: The Towing thread

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Originally Posted by filbe View Post
A different question re towing.
The other day I was towing our 3 ton van at 80/85kph on the flat; no wind. In drive or sport mode it obstinately stayed in 7th gear; at about 14 litres per hundred indicated. Yet if I manually forced it to 8th gear it still pulled happily and the consumption dropped to about 10 l/100.

Do I risk damaging the engine but pushing it to 8th gear? (Whenever a hill appeared I dropped back to sport mode and let it decide the gear.)

Is there a way to persuade it to use 8th when in drive or sport mode? (Apart from flooring it and hitting over 100kmh ).

Thanks
Phil
Drive in Auto mode! Sport mode works best only when driving brusquely like when trying to outrun cops. For other forms of driving, select the appropriate mode for best performance. One can't expect Sport mode to work well when towing.
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  #717  
Old 03-21-2014, 04:55 PM
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Re: The Towing thread

Our CRD happily tows our 2200kg van under all conditions and I find Auto will do the job no worries.
I do however use Sports mode regularly - and there are two situations where i notice a difference.
1. where I am cruising at highway speeds and the country is a bit undulating.
I find the slightly earlier gear changes coming onto a hill allows the Jeep to maintain the momentum a bit better
2. In city traffic coming away from traffic lights, again the earlier gear changes in Sports mode allow easier flow with the traffic.
As Bob mentioned, the difference is slightly sharper performance - and the fuel economy hasn't changed by using Sports.
There is another bonus to us with QL, and that is the 13mm drop in height in Sports. We use a WDH and the small drop in height tightens the hitch and very slightly stiffens the combination. In country that has rough pitching road surface, this stiffening improves the ride.
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  #718  
Old 03-21-2014, 05:06 PM
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Re: The Towing thread

And just to show we do use the van, we are presently having a few days on the banks of the Condamine River, amongst the red gums and white cockatoos.

When we get home we organise ourselves, and early April head for Broome, via the Plenty Highway and Alice. Gregory, Purnululu and a few other spots on the way up.
On the way back we'll do Darwin and Kakadu, across and up to Weipa before getting home mid July.
Be good to miss most of the Gold Coast winter.....and although we've been to all these places a few times before, we're looking forward to being out there again.
John
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  #719  
Old 03-21-2014, 05:46 PM
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You could also leave it in normal mode and just select ECO off. That also modifies shift pattern and throttle response.
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Old 03-21-2014, 06:02 PM
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And just to show we do use the van, we are presently having a few days on the banks of the Condamine River, amongst the red gums and white cockatoos.

When we get home we organise ourselves, and early April head for Broome, via the Plenty Highway and Alice. Gregory, Purnululu and a few other spots on the way up.
On the way back we'll do Darwin and Kakadu, across and up to Weipa before getting home mid July.
Be good to miss most of the Gold Coast winter.....and although we've been to all these places a few times before, we're looking forward to being out there again.
John
They have a winter on the gold coast?

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