Quote:
Originally Posted by Thumper
Nice swap! but Whoa,whoa, whoa. That is a 2 valve engine, isn't it?
4 valve zongshens are WATER cooled.
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no its 4 valves. rated t 23.4hp but i guess 19.5 at the wheel on the dyno according the the russian video below.?
turn on closed caption and change the setting to english to understand what the hell they are saying.
here is the video of the 4v head
here he disassembles the top end.
here is the video of the dyno test vs the zs172fmm-6 vs a 172 2 valve i think and explain the power band difference
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here he compares the zs172fmm-6 to an older 2 valve version? zs172fmm-?
i just found these videos earlier today before work and havnt had time to watch them all and read everything they said but it is informative.