Lpc2000

very Nice! My brother used to race drag bikes years ago at Santa Pod. I 
believe that, at one time, he had the fastest time in Europe for any 
class of dragster, but that was over 25 years ago. I guessed you were 
mapping fuel. It must be an omen, and a good one  that one of my 
calculations resulted in 0x0666, the number of your personal beast!

Have you ever dynoed the bike? Obviously for the maximum possible 
performance you need to get the perfect balance between airand fuel in 
and exhaust capacity, such that all fuel is burnt, without an excess of 
air. In this manner you produce maximum power. Any deviation from the 
optimum burning mixture results in either excess, unburnt fuel, or 
excess unreacted air. In either case you are losing efficiency. In my 
experience fuel maps just aren't as simple as your example. even for ma 
given pressure they are not linear. I will email separately to your 
private address some fuel maps from a high pressure liquid LPG injection 
vehicle. Any deviation from optimal injection timing will give a drop in 
efficiency. many drag racers seem to be quite happy just using these 
crude linear maps thinking they can just throw fuel down the manifold 
and blow off the excess, unless you have more volumetric capacity than 
you can possibly handle this is not so.
Any way, since this is OT I'll follow uip privately.

Al

Rolf Bredemeier wrote:

> Hi Al!
>
>
> ----- Original Message -----
> From: Onestone
> To: lpc2000@yahoogroups.com
> Sent: Friday, March 11, 2005 6:25 PM
> Subject: Re: [lpc2000] 2d linear Interpolation
>
>
> > Somebody's doing fuel maps from the look of this, however fuel maps 
> just
> > aren't linear the way yours are. You may as well just set the start
> > point and the end point thus:-
> > [...]
>
> Many, many thanks to you for thel lot of time you spend to me!
> I think, this hints will bring our drag bike to the top ten! ;-)
> if you like, you may take a look on it:
> http://www.markvanderkwaak.com/events/2003/drachten3/dr3_060.jpg
> (I am the boy in the middle)
>
> The motronic was made with an AVR, but realy not perfect. For my ugly 
> programing,
> the AVR had not enough power, to manage things like logging and 
> telemetrie.
> And the fuel cal was very bad, only one large table with 1d 
> interpolation for
> pressure. But, regardless of everything, it runs!
>
> Excuse me for the of-topic stuff.
>
> Best regard and many, many thanks again, Rolf
>
>
>
>
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