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Discussion Starter · #1 ·
Just added a BlueSpark tuning box to my CD, and I'm here to tellya that it definitely works. The Pro + Boost model increases fuel pressure at the rail and increases turbo boost pressure. HP selectable up to 306, torque up to 509 ft-lbs. But not at the same time. There are technically an infinite number of settings on this, so it's gonna take some trial and error to settle on the one I like best. But none actually deliver the advertised 306/509 simultaneously. Note: the following numbers are mine. I extrapolated them from the documentation that came with the box. They are not manufacturer numbers.

Still, highest torque is delivered with what I've concluded is the 300/509 combo, highest hp with the the 306/483 combo. There are 9 of these hard settings (plus OFF), the lowest of which is 244/432. Each setting can be further adjusted with a second control. It's a rheostat, so there's no way to get actual numbers without a dyno. What it does however, give you an infinite adjustment of the hard setting increase within a 50% to 100% range. I can see how this would be valuable to fine tune the "feel" of a hard setting.

For example, I (naturally) went right to setting 8 (300/509). There was a great gush of torque through the first 3 gears. But in the next three gears I didn't get the gush until up higher in the RPM range. I guess that's where the HP boost kicks in. I didn't dare try 7th and 8th, cuz I was already over 100 mph in 6th. It's not turbo lag, but it felt like it. So if it's mismatched hp and torque curves, I can see where the 2nd control might be able to tweak them a little closer.

I've since backed off to the 288/496 setting @ 100%. Still plenty of power, and not as much of the "lag" sensation. But without a dyno, finding the sweet spot in this box is going to take a lot of time and fuel. Having said that, the option of adjusting is still much better than a "one size fits all" box - which - when you think of it - describes an ECU remap as well. If you don't like it, you've wasted your money. Unfortunately I've got knee replacement surgery coming up soon, and I may not get this done until sometime well into next year
 

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Very nice. I looked into tuning a while ago after I purchased my Cayenne diesel. I may still look into tuning just because I never keep any vehicle stock. So far it has enough power for me...since it is primarily driven by my wife.
 

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Discussion Starter · #3 ·
Update: BlueSpark also claims modest fuel economy improvements along with torque and horsepower boosts; +5% to +15%, depending on settings selected. I initially took the claims with a grain of salt. I believe I installed the box at about 1200 miles, and I'm up to 2800 miles now. Highway mileage has markedly increased to the point where I'm consistently getting over 35 mpg highway now. Whereas the overall mpg started out ~24 mpg, it's now climbed to over 28 and climbing. And that's on the crap 40 cetane diesel fuel they sell around here. This tuning box must be even more impressive over in Europe, where owners have the option of buying up to 60 cetane fuel.
 

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Discussion Starter · #5 ·
Note that the price is in Euros. That suggests to me that they don't have a tuning box for the US/EPA spec Cayenne Diesel. I initially encountered the same issue with Bluespark. Difference is that they're a British company, hence no transatlantic language barrier.

I was able to work with them to tweak the mapping to work with my EPA-spec electronics. They retained the map to use on future US-desytined boxes. So communicate with them up front (Jason is the point man) and make sure your box arrives with the right mapping.

//greg//
 
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