We aren't big fans of dyno charts because they only tell you what happens on full throttle, and are open to fiddling by unscrupulous operators since what they are measuring is bhp and torque at the wheels, not the flywheel. Also, it is possible to get higher readings on a dyno than on the road because a dyno run takes only a few seconds in 4th gear, which is not long enough to show up any fuel supply or turbo overboosting issues, either of which can cause limp mode or engine cutting out on the road.
However, our partners at energy-tuning.co.uk recently acquired a very nice Freelander TD4 that had been maintained regardless of expense by its former owner. We decided to answer our few critics who claim we don't have figures and charts because our products and remaps aren't much good...
The results also apply to the 75 and ZT cdt (and cdti after the remap was installed) as well as BMW 118/318D, which all use the same 1951cc M47r engine. IMAGE: 75BHP.JPG
Four runs were done on a dyno operated by another tuning company.
No tuning - expected figures of 114bhp and 193lbs ft (260nm)
With the RonBox 2a+ installed on setting 5, both switches down and using the existing Bosch MAF (in reasonable condition) - 148bhp.
Next, with the both switches off and our tuning file suppliers standard 140bhp remap, tweaked at our request for more midrange torque: 142bhp
Finally, with the both switches 'on', 171bhp.
Even these last results are as expected - many 75 and ZT owners since 2005 have had both a RonBox 1 or 2 and a remap and have obtained almost identical results. If you choose this last state of tune on your own head be it - we aren't trying to sell it to you!
However, with a dash switch plugged into the box, then you can switch to maximum performance just when you need it. Charts on the gallery page.