Diesel Power Chips

Norm, were those dyno figures on your profile taken before the new exhaust system?

They show about a 37% increase in power and 50% increase in torque. This seems to be a lot more than the suppliers claim on their website.

Was the chip just plugged in or did the dyno people do anything else to your vehicle?

Gone Bush, The dyno was done before the exhaust was fitted.
The chip was plugged in then the dyno was run. The chip has 9 settings (I think). They ran the dyno a couple of times at different settings. From memory, we ended up with it set on 7.

At nine, the engine didn't like it at high revs - lost all power.
At 8 it ran well, but we backed it off to 7 as there was not a lot of difference in power and 7 probably results in lower EGT and less stress.

Have not checked EGT and suspect that if I push the vehicle hard for too long it might get a bit high (but have no basis or evidence of this). When towing, we cruise at around 90 to 95KPH, normally in 4th, so I don't think there are any issues here.

Big benefit of the mods is it is much easier to get going from stand still with the load on, we pull up hills at least one gear higher than before, and when we need to overtake, we have some get up and go to do it.

The dyno gives an accurate measure of the power I believe, but not the torque. The guy who did the dyno said as much. Don't know the reasoning, but he said he could not accurately measure torque at the wheels. If you look, the scale for the bottom graph is pretty meaningless.

I could hardly complain as I did not pay for the dyno. The chip supplier said he would pay for it (dyno shop is next door to his place) and let me decide if I wanted to buy the chip after the dyno and a good road test. I did the road test first and had already decided to buy, but got the dyno done anyway to get the improvement measured.

Added the exhaust later. Had arranged to get another dyno done after the exhaust, but never had time before we headed off for the Gulf earlier this year. I think the exhaust has added more, but more importantly, has made the power available at even lower revs.

Great article Phil, thanks fo the link.
I need a Nm for Dummies book though. Looks like it shows a standard set up with 3520Nm? 352nm? of tourque at 2000rpm and then increases to 3900 Nm at 2000rpm with the chip.
20% increase in torque
84kw at 3000rpm increases to 96kw at the same revs with the chip. Just shy of 15% increase.
This is where I need the Nm book for Dummies. Would that mean that a chipped vehicle could travel at 115kmh at the same revs and fuel consumption an unchipped vehicle would at 100kmh?