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Coan Max Performance 9" Converter

723 Views 2 Replies 3 Participants Last post by  Tod74
Anyone ever run one of these converters from Coan? My buddy gave it to me said it stalls at 4600-5200 and locks up like a big dog on the top end. I have never used any Coan stuff so I am not sure if this converter is a helper or not.
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I ran a custom 8" Coan behind my 355 on a 175 shot for several years. Went to a 9" Coan with my 427. Tried the 8" with the 427. It worked good on the motor only. Would not go below 6,500 on a 150 shot. Coan said they couldn't make the 8" any tighter so I had them build a 9" converter. Both converters worked great. They flashed nicely under full throttle but still only slipped 7% or less on the top end.
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