Rotec Liquid Cooled Heads

Anybody using LCH's?  How is it working.  Do you have suggestions for the radiator nd placement in the CH750?

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Permalink Reply by shaun wheeler on August 6, 2026 at 5:38pm

I have the same questions but for a 701. I'm thinking a 3300 but with the LCH so it weathers slow speed better. I just don't think air cooling would cut it at slow speeds. 

I've tried to reach the dealer in Shelbyville but I'm guessing they're on vacation at the moment. 

Permalink Reply by John Austin on August 6, 2026 at 6:10pm

I'm quite sure Nick and the crew are recovering from Oshkosh! Lol!  I'd definitely get his opinion, but the Gen 4's are so easy to cool that I doubt liquid cooling is necessary and would eliminate a whole layer of complexity and expense.  On my 750 STOL,  I didn't even have to alter the ram air ducts at all and the engine runs nice and cool - truly a "plug and play " experience!

John

N750A

Permalink Reply by shaun wheeler on August 11, 2026 at 9:54am

Success - They apparently are rested and unpacked from the trip. I'm ordering my motor mount this week. Roger@Zenith said when they ran the 3300 test bed they tinkered with the baffles a little bit and got the temps pretty well lined up front to rear. 

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