towing a 18.57 Jayco expanda

My hzj105 with aftermarket turbo (no intercooler) would tow a 3 tonne bushtracker all day long at 100km/h no worries.

Have your injectors been serviced? What exhaust are you running? Has it been dyno tuned

You may want to spend a few hundred dollars and get your vehicle dyno tuned to experience the full potential of the vehicle if it hasn't already been done.

If the dyno does not work get your injectors serviced and maybe a new 2.5 or 3 inch mandrel bent exhaust and then a dyno tune again.

If you are happy with all other aspects of the vehicle I would get All the above done which would be much cheaper than a new vehicle.

Rough costs:

exhaust system $ 800-1000
injectors $ 500-700
dyno before and after $300

This sounds encouraging!

The car has plenty of power until you hookup the van and the egt's rise quickly.

I had new injectors fitted at 150K, it now has 185K so they should be ok. I am running a tiapan 3inch mandrel bent exhaust, and had it dyno whenthe exhaust went on. I have now added the water to air intercooler to get the egts down but it has done little.

I think iI better get it tuned again with the intercooler on. I have been told not to exceed 550 degrees and have been to 600 once, but mostly try to stay under 500. It is almost impossible to keep the egt under 500 and doing 100km with the van on, even down hill!!

Now i just need to find someone who knows how the tune this thing properly for towing......

Any sugeestions around Brisbane?

Mine was done at Brisbane Tuning and Turbos at Woolongabba.

You could also try Mike Vine at Capalaba, I have heard he does a pretty good job.

I've heard mixed things about Mike Vine. I suppose I should check him out for myself. I will give both a ring today.

I am fairly confident it must be a tuning issue now.

I've heard mixed things about Mike Vine. I suppose I should check him out for myself. I will give both a ring today.

I am fairly confident it must be a tuning issue now.

Dremus where is your EGT sensor fitted? if it is in the exhaust, after the turbo, then with those figures you should not go any higher. If the sensor is in the manifold you can take it up another 200 with out any problems.

It is in the exhaust after the turbo, thats why I am concerned, as everyone says to keep it under 500.

I reckon I could get it to 700 if I wanted quite easily, as long as I had a spare vehicle following me :)

Another thing for the high temps is low boost compared to the amount of fuel being delivered.....so has the injector pump had a tweak and what is the boost pressure?
I have had the temp rise quite high when I lost some boost pressure cause a silicone hose came loose on my intercooler, I have a water to air cooler as well and it sure has brought the temp down.

I have a 200 TTD series now and it will tow all day long at any speed I want!!!! I can only suggest you have a test drive, because after that you will want one.

Isuzumu, I think you are right. I know a diesel will run hot if it is overfuelled and you can blow them up by doing this. Someone told me they will run hot also if they are too lean aswell with too much boost. I never thought this was true. I have been getting much better fuel economy as soon as I bolted the water to air intercooler on, which makes me think I need more fuel to get more power - but I dont need any more heat. Is it possible to get more power with out creating more heat, just by getting to air fuel ratios correct?

I will be getting it dyno tuned next week and hopefully they know what they're doing..

100 series, I have test driven a 200 on Fraser Island at the Toyota fishing classic this year. I loved it and it felt solid. I also tested the 76 wagon, but was a little dissappointed at how small it was compred to the 105 I have now. I just can spend the $$ on a 200 now.. :(

Dremus......if your blow by goes into the air intake before the turbo check for oil in the intercooler as well......I have a catch can fitted in line to stop the oil getting to turbo, this oil will all so cause the boost to drop.

I can already see some oil around the intake manifold after the intercooler. It has only been on 2 weeks. I assume there is oil in there now. Better have a look at that whike I'm going.

If the 2.5 TD can pull 1800 kg easily, my 4.2 cruiser I have at the moment should at least come close to the pathy, given your newer technology but my larger capacity. Thanks for the comparison.

I agree with your preferences here. I would have faith in all of the above

toyota, toyota or toyota

This is true and I don't mind 80-90kmh just not when that is all its got!

One decent hill and I have nothing left to give. I will try to sort the current rig as I think other people are getting better results out of the same engine set up.

My engine temp needle does not move at all. It is true about the viscous hub. mine died 10000K ago and I had engine temp issue. I replaced it with a new one and all was good. Also replace the thermostat and radiator while trying to find the problem, but oh well, all is new now.

The injector pump has not been touched yet.

I am running a K&N filter and snorklel which is supposed to flow well aswell.

I will have to get it dynoed again, as it wasn't done since the intercooler, as I wasn't chasing more power at the time just cooler temps.

The Toyota temp gauges are notorious for not moving at all and not till its toooooo late and not even then

Buy one of these and fit it for EXACT block temps all the time.

www.enginesaver.com.au

Get the dual low water /temp gauge.

Yeah I was only towing in 4th, it had no chance in 5th....

I got about 5 kpl which was average I thought.

Thats not good news... I was hoping you were going to say yours will sit on 110 all day...

I thought it might be the wind drag playing a major part, and still think its a factor, but other people say they are towing heavier vans with the same rigs with good results.

Have you had yours dynoed? The 80s usually pull harder than the 100s.

No dyno. But recon when exhaust is finished to 3" all way back, I should be able to cruise at 100 instead of ringing it's neck at 110. Fingers crossed

I hope so too... I already have 3 inch all the way so I'm in trouble :(

Hi, We have a 97 Explorer and I am pretty happy with its towing performance. We have a 17ft Jayco Heritage poptop and we are getting 5kms/ltr. I was thinking about trading in for a diesel but the research I have done so far doesn't justify the change. I would probably have to spend $15K plus for maybe an improvement of 1 to 2 kms/ltr. It will take a long time to save $15K worth of fuel and the Explorer is very comfortable and has more than enough space and power. Cheers.