HP och Torque för Sportster 48

[#1725]

Killarna på Twinmotorcycles i Holland fick av en kund i uppdrag att utveckla ett avgassystem och en mappning som gav bästa prestanda ökning. De spenderade ett stort antal timmar och har nu fantastiska siffror att visa (klistrar in resultatet också - länken går till en forumtråd om design och utvecklingen på pipan)
http://www.xr1200ownersgroup.com/sit...7958#post77958

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Oke today I tested the final production version. This means that we don't change anything anymore on the sizes of the inner tubes, lenght and bends.
We can from here make the final production version. After also making the final fuel and timing map, that little 48 pulled:
- WITHOUT DB-KILLER 81.9 HP at 6059 RMP and 110 NM at 3381 RPM on the rear wheel
- WITH DB-KILLER 83.6 HP at 6281 RMP and 108 NM at 3063 RPM on the rear wheel

The Stock bike made 57,4 HP and 92 NM of Torque.

WE GAINED COMPARED TO STOCK WITH OUR TORQUE HAMMER 26.2HP AND 16 NM WITH DB-KILLER
WE GAINED COMPARED TO STOCK WITH OUR TORQUE HAMMER 24.5 HP AND 18 NM WITHOUT DB-KILLER
Here is the graph with and without db-killer:



In the graph above, you can see very good what happends with removing the db-killer. The Midrange is getting very strong and you loose some top end HP.
With the db-killer installed you gain some top end power and loose some midrange. I don't change this because it is not so easy to make agood db-killer without loosing a lot off power.
In the picture below you see I use 4 pieces of 02 sensors, 2 in the bike stock place and 2 to control the ECM with incorrect way of working.
The Harley Davidson FI system is not working always as it should be, that is why i correct the ECM with my own measurement with the 2 wideband sensors. It is a lot of work like this but once it is running it runs beautiful.


Oke, The bike go's back now to the Manufacturer to make heatshields and stuff to complete the system.

De kan sina saker där

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[admin]

Fasen att bilderna inte funkar, det beror på att man måste ha konto på XR-forumet! Kan du inte "spara" ner bilderna och lägga in dom i albumet här inne? Sen länka om de igen....

Men feta resultat...25 kusar till!!!

[#1725]

Nu borde det fungera, sparade ned dem på mitt Picasa och länkade om dem

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