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  #133  
Old 02-26-2015, 07:12 PM
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Re: For those who are thinking about Bluespark...

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Originally Posted by Barboots View Post
Is it actually known where the fuel usage calculation is derived? I have a feeling that the measuring device is going to be "upstream" of the modified injector flow... in which case the usage will remain correct as indicated.

Solid information regarding the manner fuel user is metered would be good to hear.

Cheers,
Steve
Correct if true but I suspect there is no measuring device. The CPU decides how much fuel to inject and it knows the distance traveled then divides one by the other. Accurate flow measuring devices are complex things justifiable more for the aero rather than the auto industry.

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  #134  
Old 02-26-2015, 07:15 PM
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Re: For those who are thinking about Bluespark...

But it calculates the fuel down the filler neck adequately?
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  #135  
Old 10-28-2015, 05:01 AM
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Re: For those who are thinking about Bluespark...

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Originally Posted by ExcursionDiesel View Post
The Bluespark has different selectable fueling "curves". I forget the sequence but basically A is stock, B is economy, C is torque, D is ?, and E is highest performance.

Some of the settings made lag worse. The ones optimized for low end torque improved the lag. I ended up on E and lag is slightly better than stock but medium to heavy throttle is pretty aggressive compared to stock.

Anytime the engine returns to low power, reapplying power requires the turbo to spool up again. A more aggressive push on the accelerator will add fuel, make exhaust heat, and spin the turbo quicker. All turbos behave this way in varying degrees. I don't even notice it anymore since I don't drive any normally aspirated cars regularly.
To clarify, the Bluespark has 5 curves:
A - economy
B - economy/torque
C - torque
D - torque/power
E - power
Each curves has magnitude levels 0 to 9. 0 is exactly that, zero (stock) regardless of the curve. Thereafter it's roughly logarithmic so it jumps to about 50% for 1 and roughly proportional thereafter to 9 which is 100%.

I've tried the higher levels of E but was disappointed. For power, one needs high revs which is not really what I do nor is it where this diesel or any diesel is happiest. Torque is what diesels are good at so I went all out with C9. Man the thing pulls like a steam train with just a touch of the pedal. Turbo lag is totally overshadowed by the humongous torque. I haven't had any codes yet even after overtaking trucks up hill at 130kmh while towing a camper trailer.
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