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paul mosher
Was just told by Superior that the IO-400 will begin shipping in early 2013. Anyone considering it for a 7 or 8?
probably no opinion because it is coming from a company recently recovering from going under. Aren't they a Chinese company now.
An engine builder to be named later told me a few years back they were working on new cylinders for the parallel valve (I)O-360 and -540's that had better flow. They expected the new cylinders to pump the (I)O-360's up to 200+ hp due to better flow....Did you hear about the new cylinders they put on Relentless? They took off the angle heads from Kevin's original 720 and installed some new parallels that breathe better. Put out 445 hp, 10% more than the stock angle heads.