Because they are brand new, I have them and they were free.Why ? This head was designed to use 930's.
The manifolds on it are 30MM at carb and 28.5MM at head. I was thinking of chamfering the carb end out a bit so as not to have an abrupt lip there but it's hardly noticeable so maybe not.Use the tapered manifolds, 32 at carb end, 30 at the port
The increased power experienced while testing on a dynamometer has to be attributed to better fuel/air mixing. The stepping, as vell the venturi, will increase air speed and swirl. Swirl consumes energy and allows manifold pressure to increase (i.e., the partial vacuum will be reduced), affecting the volumetric efficiency of the engine. However, because of the improved mixing and higher gas speeds within the combustion chamber at the exhaust stroke, there may still be a positive net outcome.
Thats the set I really wanted.....
Going to need a real good adapter for this one , 1200cfm, the saving grace will be the Vac secondarys ,I prefer double pumpers.
What port sizes are in your head? 30mm or 28.5mm?Mike just did this with my 750. Flared the intakes to match the carbs, not polished. 3.5 slides #2 needle in the richest clip setting 17 pilot. K&N filter and Baffled reverse megaphones. Runs great, it always ran better the my 850's. Just posted my problems with it not wanting to idle down. Hope to correct this tomorrow.