Does anyone have any experience with diesel tuning modules they sell on ebay? It's supposed to increase the fuel burnt in the low rev ranges and hence increase BHP and Torque. They also claim to improve MPG as a result of being "able to shift up a gear sooner and so run on a lower rev for the same speed". I can't see how this is possible with an automatic...

http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWAX:IT

http://www.pro-bitz.com/pdf/tech.pdf

Thanks.

Adrian

 

In this world there are no freebies. To every action there is an equal but opposite reaction (newtons laws of motion). These things work by fooling the ECU into believing that there is more air entering the system than there really is. As such the ECU increases the pulse duration on the injectors to keep them open longer ergo more petrol/diesel is pumped into the combustion chamber. As a diesel engine always runs in a lean condition i.e. more air to fuel you get a bigger bang, however you are using more fuel so I would question the mpg claims. Many modern ECU have adaptive algorithms which may in time become confused by the new information. The only true way to do this is to remap the ECU as they do on race cars where you look at the various parameters of the car on a computer and adjust the parameters of the ECU until such time as you get optimum output from the engine.

You spend your money you take your chances. Best of luck,

 

My thoughts exactly. The 2.8 CRD is tuned more for torque than BHP and it feels fine as it is. I can't see how I would experience any benefit even if I don't care too much about MPG.

Also I can't see how I could benefit with the Grand Voyager being automatic.

This company does have a 30 days money back guarantee. They stopped responding to my email and advised me not to buy it when I asked to clarify their return policy and said I am expecting at least a 10% improvement in MPG.

 

These modules work......I had one a few years ago on a Rover 75 diesel...It did not really make any difference to fuel economy one way or the other.

However I feel the 2.8 CRD Voyager really doesn't need one......As it is the engine produces 360nm of torque or there abouts.....I think this is about as much as I'd like 41TE Auto transmission to handle.

Until I got a 2.8 CRD Voyager, I'd never had an automatic car that would actually wheelspin slightly on full throttle take off in the dry.....As It is I worry about breaking something in the drivetrain....So I'd never be tempted with tuning the 2.8.

 

I have a 2.5CRD and I can't say that it needs more power, and as for changing up early, I don't think that's an issue - mine will happily potter along at around 30mph in 5th with my foot completely off the throttle so you can't change up at any lower revs than that.

 

Being someone who's used to 43mpg in a Alfa Romeo 147 1.9JTD, doing 26mpg in the Grand Voyager does worry me a little. I have little choice as I need to seats and boot space. What kind of MPG are you guys getting and any tips with regards to the car (bus)?

Booke23 what was the module like in your Rover 75?

 

I have a 2000 model Voyager with the old 8v motor on a manual transmission and get 35 around town and 40 on the open road. I have recently acquired a Grand Voyager of the same year and engine so hope that gets the same.

You will never get good consumption out of an auto which is why I got rid of my Toyota Previa which is by far the best people carrier ever and dwarfs the Grand Voyager in both seating and boot space.

 

I get around 30mpg on local runs (country lane driving, and I don't hang about) and 42mpg on long runs on cruise contrl at around 75mph. I had a 1 litre Nissan Micra before the Voyager, and I don't think that was much more economical, and a lot less practical.

 

Wow. Is yours a 2.8CRD with auto box as well? Maybe I should accelerate faster so I can "cruise" in a higher gear earlier, rather than softly softly on the pedal and take forever to get to 30mph...

I get around 33mpg on the motorway... and I only drive 70mph! Honest!

 

No both actd's car and mine are manuals and both are 2.5 just different generations. Mine is an 8v non CRD and his is 16v CRD, but as you can see little difference in consumption between the two.

If you want good consumption you need a manual.