August 2005
A PowerCommander USB is already on its way. What occupies now my mind is that all the maps that are provided by Dynojet/PowerCommander for SP1 seem to have very significant negative trim values in them.Why is that ? I always thought that in most bikes the stock map needs typically some richening to soft down the coarse engine behaviour especially in the low rpms. Seems that the Honda PAIR system injecting air to the exhaust system is the reason for overly rich mixtures. In order to burn in the exhaust properly the exhaust gases need to contain CO and HC instead of CO2 and NOx.
I will install my wideband lambda probe ( Tech Edge : 0 258 007 057 LSU sensor + 2C0 unit + LD02 display ) into the SP1 during next winter providing realtime AFR readout. However, the PAIR system needs to go before any reasonable measurements can be made. Also, I need check/remove any air leaks in the exhaust system to ensure correct readings.
Another interesting thing is that the removal of the flapper valve system seems not to cause any special need to add the fuel injection in the 7000-8000 rpm area, even if the valve could restrict the air flow cross-section maximally 60 %.
In an effort to try to find some common trends in various maps developed by various persons for a RC51/SP1 2000-2001, I calculated an average map based on 28 individual maps. These maps were selected among those downloadable from the Dynojet site (i.e. from Maps available for PCIIIr/ III USB models & User Submitted Maps). I selected such maps where the rpm and throttle breakpoints were similar so the map cells "coincide". The maps contain maps both for US and European models and of course for a variety of exhaust and inlet options.
The average map is here (right click to save and if necessary, change the file identifier back to .djm).
-----------------------
Elikkäs joskus harrastelin tuommoista. Tuo teksti ja siinä mainittu linkki löytyy täältä:http://www.kolumbus.fi/koivupiha/sp1.htm
Ehkä se pelittäisi. Itsellä toimi aikanaan hyvin.
A PowerCommander USB is already on its way. What occupies now my mind is that all the maps that are provided by Dynojet/PowerCommander for SP1 seem to have very significant negative trim values in them.Why is that ? I always thought that in most bikes the stock map needs typically some richening to soft down the coarse engine behaviour especially in the low rpms. Seems that the Honda PAIR system injecting air to the exhaust system is the reason for overly rich mixtures. In order to burn in the exhaust properly the exhaust gases need to contain CO and HC instead of CO2 and NOx.
I will install my wideband lambda probe ( Tech Edge : 0 258 007 057 LSU sensor + 2C0 unit + LD02 display ) into the SP1 during next winter providing realtime AFR readout. However, the PAIR system needs to go before any reasonable measurements can be made. Also, I need check/remove any air leaks in the exhaust system to ensure correct readings.
Another interesting thing is that the removal of the flapper valve system seems not to cause any special need to add the fuel injection in the 7000-8000 rpm area, even if the valve could restrict the air flow cross-section maximally 60 %.
In an effort to try to find some common trends in various maps developed by various persons for a RC51/SP1 2000-2001, I calculated an average map based on 28 individual maps. These maps were selected among those downloadable from the Dynojet site (i.e. from Maps available for PCIIIr/ III USB models & User Submitted Maps). I selected such maps where the rpm and throttle breakpoints were similar so the map cells "coincide". The maps contain maps both for US and European models and of course for a variety of exhaust and inlet options.
The average map is here (right click to save and if necessary, change the file identifier back to .djm).
-----------------------
Elikkäs joskus harrastelin tuommoista. Tuo teksti ja siinä mainittu linkki löytyy täältä:http://www.kolumbus.fi/koivupiha/sp1.htm
Ehkä se pelittäisi. Itsellä toimi aikanaan hyvin.
