I've always been told to hold the throttle open when checking mine? I would assume its so you get the maximum amount of air as possible?
I thought he was running 150psi Jason? I could see him making up the psi by going to 28's like almost every other head manufactor says..
150 psi if he cranked it over a dozen times...I have always heard that 3 revs is where you want to stop to get an accurate reading (not sure if this is true). I could see him making up the compression by droping down the dome size too but ADA says 180psi with 32cc domes and he is way off. ADA website says 200psi with 28cc domes.
not sure the best way to describe it but you get full air flow into the cylinders...... try it with the butterflys closed and then open them up, you will see an increase in cranking compression.
We tried it at WOT on one cylinder but only saw maybe a 5psi difference if that so we didnt try it on the other. We checked it multiple times.
We need to get a good/expensive compression guage on it just to be 100% sure that is the problem but I am guessing because it said 125-130 on 2 different less expensive guages that it is probably close to that. Im not sure if the new base gasket is thicker....I believe it was out of a 750 gasket kit.
Side note...when looking at ADA's site for the girdled head it says 32cc domes = 180psi, when I look at their non-girdled head 30cc domes (the biggest they have for that head) it says 150psi. The kawasaki 750 girdled head also says 30cc domes = 150psi. Is it possible that the non gird. domes fit the gird. head and somebody made a mistake or their website has the wrong info?
