ISUZU Diesel engine remapping

rgren2 · Guru

ISUZU Diesel engine remapping

deverall11 · Guru

KevinJ wrote:
I started this thread and am so appreciative of the quality responses and opinions.
I might ask Isuzu Ute if they would tune the MU-X for towing just before I go away on longer trips and then tune it for town when I am home for any length of time.
Thoughts???

Gday Kevin,

Not sure why you would want to do that. The costs involved would negate any saving you get on fuel ect. The tuner/tuning house would charge you

for the swap each time. I have a remap and that is it. When not towing the go pedal does not travel more then 1/4 distance. Average fuel consumption

is high 10s to low 11s, towing a little higher (have a spreadsheet). When it is required a lot of go is available - overtaking cars for example.

A towing tune is a great way to reap most benefit from a vehicle. Torque is further down the rev band which translates to lower revs, lower revs = less fuel.

There is a caveat here however. There is a misunderstood belief that modern diesel like to be lugged around. This unfortunately is totally untrue.

Modern diesel like to spin, not thrashed. The spin is a method to evacuate hot gases out of the engine. Modern diesel make more power and torque - Toyota 70 series

vs 200 series, the result being hotter combustion temps. A freer flowing exhaust also helps here. There are many observations from owners who

have had a higher tune, chip or remap observing that while the vehicle can hold a higher gear - more torque (4th to 5th or 5th to 6th), the EGTs

(Exhaust Gas Temperatures) were noticeably higher.

A chip, depending on the make, can have the ability to allow you to change tune or turn it off altogether. As mentioned previously, a chip is a

compromise vs a remap. Chips were a popular option until tuners learned how to remap ECUs. I am not aware of interchangeable remap tunes.

It doesn't mean there are none. Maybe rgren2 is referring to chips.

Cheers,

Larry

KevinJ · Senior Member

Thanks Larry,

I had not thought of the retune cost outweighing the savings in fuel. I might leave "as is" after all.

I tend to drive to an RPM rather than a speed anyway so try to keep litres/100 under control.

yobarr · Guru

deverall11 wrote:
KevinJ wrote:
I started this thread and am so appreciative of the quality responses and opinions.
I might ask Isuzu Ute if they would tune the MU-X for towing just before I go away on longer trips and then tune it for town when I am home for any length of time.
Thoughts???
Gday Kevin,
Not sure why you would want to do that. The costs involved would negate any saving you get on fuel ect. The tuner/tuning house would charge you for the swap each time. I have a remap and that is it. When not towing the go pedal does not travel more then 1/4 distance. Average fuel consumption is high 10s to low 11s, towing a little higher (have a spreadsheet). When it is required a lot of go is available - overtaking cars for example. A towing tune is a great way to reap most benefit from a vehicle. Torque is further down the rev band which translates to lower revs, lower revs = less fuel.
Good post Larry,and as you suggest the torque available is further down the torque band.My car now has 650nm of torque from 1200rpm to 3200rpm,an increase of 45%.Power increased from,160HP at wheels to 197HP at wheels after tune. Rarely do I change gears at lower than 3000rpm but I still get 5.8km/litre (17 litres/100km) towing at 6800kg GCM. That's good enough for me! However,I would like to point out that lower revs DO NOT mean lower fuel consumption.This is a common misunderstanding which gives no consideration to engine efficiency.A car that is effectively labouring will use more fuel than a free-revving engine,as well as running hotter.Revs lower both water and oil temps,as well as increasing airflow through the radiator and over the engine.At 6800kg in my V8 Landcruiser my EGT is around 350-400 most days,and rarely rises on long uphill pulls because I use revs.The chap who did my tune advises not to worry too much until temps rise to 650 degrees,but even that is acceptable for brief periods.I've never got near that despite some long,steep mountain climbs in lower gears.
There is a caveat here however. There is a misunderstood belief that modern diesel like to be lugged around. This unfortunately is totally untrue.
Modern diesel like to spin, not thrashed. The spin is a method to evacuate hot gases out of the engine. Modern diesel make more power and torque - Toyota 70 series vs 200 series, the result being hotter combustion temps. A freer flowing exhaust also helps here. There are many observations from owners who have had a higher tune, chip or remap observing that while the vehicle can hold a higher gear - more torque (4th to 5th or 5th to 6th), the EGTs (Exhaust Gas Temperatures) were noticeably higher.
Good comments here regarding low revs meaning higher engine temps. As well as the tune I also fitted a 3 twin-pipe exhaust system to stop the engine effectively choking on its own fumes.
A chip, depending on the make, can have the ability to allow you to change tune or turn it off altogether. As mentioned previously, a chip is a compromise vs a remap. Chips were a popular option until tuners learned how to remap ECUs. I am not aware of interchangeable remap tunes.
It doesn't mean there are none. Maybe rgren2 is referring to chips.
Cheers,
Larry

Good post Larry.Tunes are way better than chips.Cheers

Are We Lost · Guru

I don't know about the MUX but BPT Motorsport has a DIY remap solution for Fords.

They have different remap packages that are stored on SD card. They sell a tablet-like device that allows you to install/uninstall the different tunes yourself. No tools or expertise needed (other than their device) and it takes 5 minutes to swap tunes while sitting in the driver's seat.

Maybe they will know of someone doing similar for different vehicle makes.

Note that I am not recommending for or against doing any tunes. But if you have an engine problem I would not hold out much hope of any warranty claim being successful if they realise you had a tune.

yobarr · Guru

KevinJ wrote:
Thanks Larry,
I had not thought of the retune cost outweighing the savings in fuel. I might leave "as is" after all.
I tend to drive to an RPM rather than a speed anyway so try to keep litres/100 under control.

Hi Kevin.There is a lot more to consider than fuel consumption.Always I have said that if you can't afford the fuel,you can't afford the car! More power,more torque and more tractability are benefits,along with improved fuel economy.A good tune gives a completely new experience.See my results in previous post.A friend used an MUX to tow a 2500kg ATM van right around Australia,and says that it is a great little car.However,he says that he would have liked a little more power and he was adamant that there is no way he'd even consider towing more than 3000kg with it.Cheers

KevinJ · Senior Member

Thanks Chris,

I'm more than happy with the available power in the MUX towing about 2500kg. I was just looking for options. I only sit on between 80 - 90 km/h towing as I am in no hurry. In my sedan, I'm zero to the speed limit in a flash but that is the difference between a rev head and a towing head. My wife prefers me to tow the van as I don't get road rage with slow drivers that way.

travelyounger · Guru

KevinJ wrote:
Thanks Chris,
I'm more than happy with the available power in the MUX towing about 2500kg. I was just looking for options. I only sit on between 80 - 90 km/h towing as I am in no hurry. In my sedan, I'm zero to the speed limit in a flash but that is the difference between a rev head and a towing head. My wife prefers me to tow the van as I don't get road rage with slow drivers that way.

Hi

I dont think towing a van will cure your road rage problem with all the daydreamers out their cutting in front of you then touching their brake pedal ,pulling up at lights instantly I have had a few near misses, overtaking on the near side lane and taking the chance on double yellow lines the list goes on and then you got to deal with the cowboy caravanners and truckies who just need to get in front of you for some reason.

Maybe they are jealous I hope

cheers

Radar · Guru

KevinJ wrote:
Someone who owns an ISUZU MU-X recently told me that they had a remapping done of their engine.
I know a fair amount about petrol engines though absolutely nothing about diesel engines.
I have a 2020 MU-X and am wondering on the merits of doing the same as I am led to believe it gives increased horsepower and fuel economy.
Hopefully there are some experts here who can advise me which way to go.
I look forward to your suggestions.

We do not own a Izuzu product.

Our cars are serviced by an independent motor repair who we enjoy his knowledge and understanding of our needs.

We do know that 2 of his customers have fitted a wire loom into the electrical system near the air cleaner both parties pull sub 3 tonnes caravans and they both have said their D Maxs are much more smoother to drive.

The wire loom is sold in South-east Queensland for sub $40 and can be very quickly put in with no tools or mods.

One of these friends learnt about the wire loom on the D Max forum.

Cannot tell you anymore then what I wrote.

dorian · Guru

Radar wrote:
We do know that 2 of his customers have fitted a wire loom into the electrical system near the air cleaner both parties pull sub 3 tonnes caravans and they both have said their D Maxs are much more smoother to drive.
The wire loom is sold in South-east Queensland for sub $40 and can be very quickly put in with no tools or mods.

This really sounds like a scam. Do you know where these are sold?

Spin · Member

dorian wrote:
Radar wrote:
We do know that 2 of his customers have fitted a wire loom into the electrical system near the air cleaner both parties pull sub 3 tonnes caravans and they both have said their D Maxs are much more smoother to drive.
The wire loom is sold in South-east Queensland for sub $40 and can be very quickly put in with no tools or mods.
This really sounds like a scam. Do you know where these are sold?

The cable stops the EGR valve venting exhaust gas into the intake manifold but will let it open if need be for excess boost. Below is a link to one supplier.

EGR Delete Kit - 4JJ1 Common Rail (RA7, RC Colorado, MUX and D-Max) Munji 4x4 Accessories Pty Ltd

dorian · Guru

Spin wrote:

The cable stops the EGR valve venting exhaust gas into the intake manifold but will let it open if need be for excess boost. Below is a link to one supplier.
EGR Delete Kit - 4JJ1 Common Rail (RA7, RC Colorado, MUX and D-Max) Munji 4x4 Accessories Pty Ltd

It seems that the product is being marketed truthfully. My understanding is that it interferes with the signal from the MAF sensor, that's all. The product targets those engines where the MAF sensor isn't used for anything other than EGR control. Seems fair enough to me.

Aus-Kiwi · Guru

Keep in mind most autos are controlled by ECU now . This could be where most gains or goodness in durability can be obtained . Kicki g down a little sooner . Not exactly relying on rpm ! So it keeps engine in the sweet spot . As most are tuned on the economy side . To stay in higher gear as long as possible !! This also raises exhaust temps .

Radar · Guru

Spin wrote:
dorian wrote:
Radar wrote:
We do know that 2 of his customers have fitted a wire loom into the electrical system near the air cleaner both parties pull sub 3 tonnes caravans and they both have said their D Maxs are much more smoother to drive.
The wire loom is sold in South-east Queensland for sub $40 and can be very quickly put in with no tools or mods.
This really sounds like a scam. Do you know where these are sold?
The cable stops the EGR valve venting exhaust gas into the intake manifold but will let it open if need be for excess boost. Below is a link to one supplier.
EGR Delete Kit - 4JJ1 Common Rail (RA7, RC Colorado, MUX and D-Max) Munji 4x4 Accessories Pty Ltd

Hi Spin.

First off, I did not think they were that expensive. The price is maked there in front of me.

Thank you for the info.