Good morning.
I am planning to convert my GS 500 to run on ethanol using electronic injection and ignition.
So, I am taking some measurements and looking for some place for build a double throttle body. This part is OK.
I am reading an Engineering book about intake and exhaust manifolds, and now I am worried on the most suitable length for the pipes of the throttle body I will order. Changing from the original arrangement which consists in two short pipes (carburettors) and a small plenum (the air filter box) for two slightly longer pipes with no plenum (each body end will be attached to a smaller sports air filter) may change the volumetric efficiency as a function of speed.
In order for calculating or even simulating that, in order for determine the better conditions, I need to know the time intake and exhaust valves open and close. How much degrees after top firing dead center.
Does somebody have these information?
Thanks for attention.
There are pictures in the clymer manual. I'll try to send pictures when I get home.
(http://gstwin.com/images/recercorner/newrac34.jpg)
Read here:
http://gstwin.com/racers_corner.htm