TD42 T Gets real hot but only when towing

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17th January 2018, 06:42 PM
MudRunnerTD

Quote:

Originally Posted by Hodge

Hey Darren mate. Are you saying this only when towing or in general? I cruise at 100km/h and it sits on 2000rpm, or just over in 5th. At that speed/rpm it has enough guts to cruise. But if i need more power to over take or something, I'd have to gear down to 4th. It just feels like its labouring.

In 4th, its 2400rpm or there abouts. It just seems like its revving too much if im in 4th crusing at 100.

Yeah certainly when towing. The 2000rpm Mark seems to not suit the TD power curve unless your running a 16g or something. For mine with the HT18 2000rpm was the Devils number mate. Cruising on flat road in 5th is fine. Trying to roll on hard from there or climbing a hill and holding 2000rpm spikes the EGTs badly.

Even with the Borg Warner tuned well 2000rpm is the wrong number. Towing was much more comfortable in 4th. I towed home from SA in 38d and saw the needle get to 2/3 but cruised at about 1/2 way. AC running and cruising at 115kmh. Dropping back to 100kmh and it dropped a little.

I need a new IC and I think my pump is at end of life.

The problem for unturned TDs and no gauge for EGTs is guys driving them bogged down at 2000rpm, EGTs rise and they have no idea. First they know Is the water temp rises and they are cooking.

A quality tune, turn the lights on by fitting a Pyro gauge to see what is actually happening and it's a great place to start.

Old mate has already spent a fortune and had a screw driver tune has no idea what fuel/boost he is running or what his Exhaust Gas Temps are doing. Buckleys chance of sorting it out.
17th January 2018, 06:52 PM
Hodge

Quote:

Originally Posted by MudRunnerTD

Yeah certainly when towing. The 2000rpm Mark seems to not suit the TD power curve unless your running a 16g or something. For mine with the HT18 2000rpm was the Devils number mate. Cruising on flat road in 5th is fine. Trying to roll on hard from there or climbing a hill and holding 2000rpm spikes the EGTs badly.

.

Yeah this is exactly what mine is like right now. And mines, even tuned with a big intercooler.
Has perfect amount of juice to just cruise on flat freeway @ 100 in 5th. But if I need it to get up and boogie in that range, while staying in 5th, EGT's inflate rather quick.
Any, even a very slight incline, I need to go 4th, otherwise, the motors labouring big time.

I suppose, it's better for it to rev higher, rather than cook.
17th January 2018, 07:26 PM
AB

Slightly hijacking old mates thread but low rpm (below 2000rpm) on hills and flat cruising is putting undue stress on drivetrain and working harder along with water pump not pushing coolant threw cooling system efficiently resulting in higher temps.

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17th January 2018, 08:03 PM
GQtdauto

Don't have a pyro just a factory temp gauge and a trannie oil temp gauge , it's amazing the difference labouring does to the fuel economy and the temps in the auto but after fitting the torque lock I haven't seen temps past 90 and no longer labour the motor if its a flat stretch I'll lock in OD at 2000 or if hilly or blowing a gale I'll lock in 3rd at 2450 for 100kph .
31st January 2018, 06:24 PM
AB

So some feedback for heavy towing a TD42T in the heat.

37 degree day very humid towing 2 tonne full height caravan back from the border with decent hills with the GQ fully loaded with family, dogs and gear.

Averaged 90-95 degrees only sitting in 4th the whole way averaging 90km/h.

Temps did get to 100 a few times on hills and one time at 105.

I think in this circumstance it did pretty good but I also haven't blocked out the spaces on the top and side of radiator either.
31st January 2018, 06:42 PM
AB

Forgot to mention AC running the whole trip.

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31st January 2018, 06:53 PM
Hodge

Quote:

Originally Posted by AB

I think in this circumstance it did pretty good but I also haven't blocked out the spaces on the top and side of radiator either.

And you have a front mount too don't you? This would also hinder some air going through the rad?
31st January 2018, 07:03 PM
AB

Yes absolutely. EGT's were 250-300 and occasionally 350 max 400.

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31st January 2018, 09:33 PM
katwoman

Katrol damn near boiled on Sunday towing an empty tandem ( yes empty). I think I'm going to start looking into better water pumps.

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1st February 2018, 08:09 AM
jff45

Quote:

Originally Posted by AB

So some feedback for heavy towing a TD42T in the heat.

37 degree day very humid towing 2 tonne full height caravan back from the border with decent hills with the GQ fully loaded with family, dogs and gear.

Averaged 90-95 degrees only sitting in 4th the whole way averaging 90km/h.

Temps did get to 100 a few times on hills and one time at 105.

I think in this circumstance it did pretty good but I also haven't blocked out the spaces on the top and side of radiator either.

Not too much different to mine but I was running on a 30* only day.

2.5t behind the TD42T up and back to Rainbow Beach 400 kms. Auto trans towing in 3rd with TCC manually locked, average engine temps in the high 80s with EGTs 300-350. Running 90-95 km/h with occasional 100 km/h on the flat.

Couple of hills I pushed it intentionally, still in 3rd locked, and it just powered up no problem. Temps hit 100 with EGTs just reaching 400. Both came back down quickly when I reached the top.
Also A/C running all the time.

I have a modded Rueben Bauer 11mm pump with Mamba 16G which ran 141.5 rwkw on the dyno in Caboolture.
I run a 52mm 3 core all alloy rad with stock water pump but 50 ml silicone in the hub and a G35 fan.

Fuel for the trip came out at 19.3 lt/100. Very pleased with it all..

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