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PB -PC Challenger 2009 - 2014 Covering 2.5 HP diesel

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  #11  
Old 02-01-18
coughy coughy is offline
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Originally Posted by BMChallenger View Post
Mmmmm not positive haha

I would upgrade tomorrow but financially just isn't possible bought my lovely wife an Audi Q7 not long ago (not for towing duties) so I have a couple more years with the challenger I'm just trying to keep her going for a while longer argh

I'll do the ecu and see how she travels
yer the ecu remap is good but i dont see the figures they sprooked to me with the savings of fuel
i use 60ish litres around town stop start driving 60kmph and only get 400km so yer it is crap
and the high way about 550ish doing 100kph so yer still not happy with the fuel usage then ad a van it gets worse and u feel like you filling up every god dam servo on a trip

so yer oj lets do this kit m8 alot of challengers will love it
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  #12  
Old 02-01-18
BMChallenger BMChallenger is offline
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Originally Posted by coughy View Post
yer the ecu remap is good but i dont see the figures they sprooked to me with the savings of fuel
i use 60ish litres around town stop start driving 60kmph and only get 400km so yer it is crap
and the high way about 550ish doing 100kph so yer still not happy with the fuel usage then ad a van it gets worse and u feel like you filling up every god dam servo on a trip

so yer oj lets do this kit m8 alot of challengers will love it
No tune I get 500km around town and 350 towing. I'm not getting too worried about fuel with the tune just better driveavikity and performance from the little diesel.
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  #13  
Old 02-01-18
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m_and_m m_and_m is offline
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Default lockup-mate

Thanks for the plug OJ

The Pajero version is 99.9% complete now, and will ship commencing the week after next.

Yes, I fully intend to release a version of lockup-mate for the PB/PC challenger, with OJ's car as the test mule.

I've already made some accomodations in the hardware in preparation for supporting the JATCO transmission. So with luck it will be mainly software changes and tuning the decision algorithm . If all goes smoothly this will bring forward the challenger release well prior to mid year. The NS Pajero too.

Interesting that this thread reaffirms the benefit of the lockup-kit even when not towing. Just driving around town on a hot day using D can see my temps climb over 100degC.
Last year in the vic high country I needed to stop several times to let the trans cool down after hitting temps close to 130 degC during long climbs. There wasn't anything already available that met my needs - so it was this issue that spurred me on to design a lockup kit which was better than anything else around.

It also takes ages to get the heat out due to limited airflow - the best solution is to stop the heat buildup in the first place - hence the lockup-kit as the solution.

If you visit my web site you can subscribe and receive emails to keep up-to-date as my new products are ready. http://www.mm4x4.com.au

Here's the original thread on lockup-mate.
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  #14  
Old 02-01-18
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littleriver littleriver is offline
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Originally Posted by BMChallenger View Post
No tune I get 500km around town and 350 towing. I'm not getting too worried about fuel with the tune just better driveavikity and performance from the little diesel.

should have gone the Roosystems Tune ....

10L/100km on average ... 8L/100km highway ...



can lead a horse to water ...

114kw 375 Nm at the wheels ...



...
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Last edited by littleriver; 02-01-18 at 11:59 PM.
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  #15  
Old 03-01-18
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old Jack old Jack is offline
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Originally Posted by littleriver View Post
should have gone the Roosystems Tune ....

10L/100km on average ... 8L/100km highway ...



can lead a horse to water ...

114kw 375 Nm at the wheels ...



...
I doubt with a remap or chip of any brand you would get those sort of fuel consumption figures from an auto trans Challenger, the combination of the high slip torque converter, high diff ratios and poor AT ECU programing cannot be overcome by an engine ECU mod.

OJ.
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  #16  
Old 03-01-18
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old Jack old Jack is offline
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Originally Posted by BMChallenger View Post
thanks OJ

I thought as much, just hoped there might be a more positive outlook.

Mate that would be a lifesaver. I'm going to get my ecu tuned to help improve towing and touring performance I've really struggled with the towing ability but in essence the car is doing pretty well. I've learned to love her and protect her a bit more throughout the trip. We both have a nasty hill to climb tomorrow which will be interesting. Low range 2nd and 3rd will get us there.

Any suggestions to add to the performance or ability? Plan at the moment is

Ecu tune asap
? Exhaust to match (not sure it's necessary)

Torque converter lockup kit

New tyres and keep her serviced as always.
Assuming the low range climb is off-road and not on the bitumen, do not select too higher gear and keeping the engine rpm up will reduce ATF temps in high load conditions. When replacing tyres, staying with standard diameter will mean you are not putting extra load on the engine and auto. The 3.917:1 diff ratios are too high for this engine and auto combination, 4.1:1 better for an empty car and 4.3:1 for cars that travel heavy and tow but at $3.5K to $4K for new CW&P sets and labour to install this is not a cheap mod.

OJ.
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2011 PB Base White Auto, Smartbar, Cooper STMaxx LT245/75/16, HR TB, 3 x Bushskinz, front +40mm Dobinson , rear +50mm EHDVR Lovells, Dobinson MT struts and shockers, Peddars 5899 cone springs, Windcheater rack, GME UHF, Custom alloy drawer system inc. 30lt Engel & 2 x 30 AH LiFePo batteries + elec controls, Tailgate hi-lift/long struts, Nightbreaker +130LB & Phillips +100 HB, Lightforce 20" single row driving beam LED lightbar, Scanguage II.
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  #17  
Old 03-01-18
BMChallenger BMChallenger is offline
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Originally Posted by old Jack View Post
Assuming the low range climb is off-road and not on the bitumen, do not select too higher gear and keeping the engine rpm up will reduce ATF temps in high load conditions. When replacing tyres, staying with standard diameter will mean you are not putting extra load on the engine and auto. The 3.917:1 diff ratios are too high for this engine and auto combination, 4.1:1 better for an empty car and 4.3:1 for cars that travel heavy and tow but at $3.5K to $4K for new CW&P sets and labour to install this is not a cheap mod.

OJ.
I have to admit I have used the low range on a couple of occasions running on bitumin is this a really bad idea? I know the centre diff is locked but I imagined that at speed it wouldn't be too much of an issue as long as I didn't do any tight locked turns?

As you say I would love to change to 4.3 diffs but the cost is too much.
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2011 PB Challenger LS 5 seat charcoal grey - ARB bull bar, gme uhf, bushskinz underbody plates, ultimate HD 50mm lift, redarc tow pro, haymen reese tow bar, rhino rack platform, bridgestone d697 a/t tyres, custom built off-road tandem axle caravan!
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  #18  
Old 03-01-18
BMChallenger BMChallenger is offline
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Quote:
Originally Posted by littleriver View Post
should have gone the Roosystems Tune ....

10L/100km on average ... 8L/100km highway ...



can lead a horse to water ...

114kw 375 Nm at the wheels ...



...
I've decided to use my mechanic who has a full dyno setup and is has great experience as a CRD tech tuner. He is also around the corner so I can get any issues sorted directly if they were to occUr. It's also $400 cheaper.
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  #19  
Old 03-01-18
BMChallenger BMChallenger is offline
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Quote:
Originally Posted by m_and_m View Post
Thanks for the plug OJ

The Pajero version is 99.9% complete now, and will ship commencing the week after next.

Yes, I fully intend to release a version of lockup-mate for the PB/PC challenger, with OJ's car as the test mule.

I've already made some accomodations in the hardware in preparation for supporting the JATCO transmission. So with luck it will be mainly software changes and tuning the decision algorithm . If all goes smoothly this will bring forward the challenger release well prior to mid year. The NS Pajero too.

Interesting that this thread reaffirms the benefit of the lockup-kit even when not towing. Just driving around town on a hot day using D can see my temps climb over 100degC.
Last year in the vic high country I needed to stop several times to let the trans cool down after hitting temps close to 130 degC during long climbs. There wasn't anything already available that met my needs - so it was this issue that spurred me on to design a lockup kit which was better than anything else around.

It also takes ages to get the heat out due to limited airflow - the best solution is to stop the heat buildup in the first place - hence the lockup-kit as the solution.

If you visit my web site you can subscribe and receive emails to keep up-to-date as my new products are ready. http://www.mm4x4.com.au

Here's the original thread on lockup-mate.
This is going to be a great addition to the challenger thanks for working on this with OJ

Is there an approx price For the unit plus fitting?

Cheers
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2011 PB Challenger LS 5 seat charcoal grey - ARB bull bar, gme uhf, bushskinz underbody plates, ultimate HD 50mm lift, redarc tow pro, haymen reese tow bar, rhino rack platform, bridgestone d697 a/t tyres, custom built off-road tandem axle caravan!
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  #20  
Old 03-01-18
old Jack's Avatar
old Jack old Jack is offline
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Quote:
Originally Posted by BMChallenger View Post
I have to admit I have used the low range on a couple of occasions running on bitumin is this a really bad idea? I know the centre diff is locked but I imagined that at speed it wouldn't be too much of an issue as long as I didn't do any tight locked turns?

As you say I would love to change to 4.3 diffs but the cost is too much.
Yes running in low range on bitumen is not good as it puts large loads on the axles, diffs and prop shafts, even the slightest of steering input can cause drive line wind up. Low 2nd is equal to high first so you are only really getting 1 gear lower to start off with. The high stall ratio torque converter will easily start off in high first with the heaviest loads you just need to feed the power in slowly and wait for the torque converter to catch up, run in 4H so the centre diff is unlocked and be patient, it feels like you are winding up a rubber band or spring. Torque converter stalls at around 2700 rpm with no forward or rearwards motion so just feed the power in gradually.

Like you I would find it hard to justify a spend $4K on diff ratios on a 6 year old / 120,000km 4WD unless I was spending most of my time towing. My problem is that while the diffs are apart I would want to fit front and rear E Lockers and that adds another $3.5K to the spend!

OJ.
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2011 PB Base White Auto, Smartbar, Cooper STMaxx LT245/75/16, HR TB, 3 x Bushskinz, front +40mm Dobinson , rear +50mm EHDVR Lovells, Dobinson MT struts and shockers, Peddars 5899 cone springs, Windcheater rack, GME UHF, Custom alloy drawer system inc. 30lt Engel & 2 x 30 AH LiFePo batteries + elec controls, Tailgate hi-lift/long struts, Nightbreaker +130LB & Phillips +100 HB, Lightforce 20" single row driving beam LED lightbar, Scanguage II.
MM4x4 Lockup Mate.
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