Tunit chip on 4.5 V8

Check out http://www.lcool.org/forum/
Heaps of info there as a lot of the fellas have chipped their units. Buggered if I know why though as they are quite adequate in standard form.

Yes I have been running a chip (not a Tunit model) for three years now.

I'm not a big wrap for the supplementary fuel chips like DP, Rapid, or Steinbauer. I have gone down the path of an integrated EFI module though Turbo Engineering in Thomastown. It has far more capability than the fuel rail or fuel pulse, plug and play type modules. What ever path you do go down, have them spend what ever time it takes on the Dyno and have them ensure you can keep your EGT temperatures under control. You would also be wise to fit the 3" exhaust and dump pipe as well as an EGT gauge as part of the upgrade. Extra expense but a necessary one in my book.

Results are outlined here;

Ute Build - Mods and Improvements


Cheers Mick

Thanks everyone for the replies.
Now I am really confused but will push on with my research.
Of course, a 3" exhaust is a must do mod.
I drove a 76 that was chipped and 3' exhaust and it fairly flew, absolute rocketship. That was what got me thinking about replacing the 80 series aftermarket turboed diesel.
Ian

I had a Tunit chip on my 4.5 cab chassis.

I was chasing some economy and power for heavy towing....I got the power but no economy improvement. Later on I added the 3" exhaust and that definitely made a significant improvement to towing performance

After that I detuned the chip and quite frankly if I had put the exhaust in first I doubt I would have bothered with the chip in the first place. I ended up detuning down to tune 3

I have since purchased a 200 with the twin turbo and don't intend to chip this motor at all....I don't believe it needs it

So 1st purchase I suggest the 3"exhaust

then reassess if you need the chip...you will only get more power.....definitely not better economy if you add the chip