REFLECTOR: IO-390

[Richard J. Gentil]

Grigore,

I have the TMX-390 which was the show piece at Mattituck's venue at Sun 
'n Fun. I did have Velocity custom modify the intake and exhaust stacks 
for the engine. There was an IO-390-X there on the field at the time so 
they were able to modify the stacks.

Another issue with the TMX-390 was that I had the intake for the 
throttle body facing the prop, which meant that I had to a scoop 
modification to the lower cowl.

Richard

Grigore Rosu wrote:
> I asked Mahlon Russell of Teledyne Mattituck (their tech expert) about 
> the IO-390 engine that they have for sale (see 
> http://www.mattituck.com/, click on Experimental Engines) for about 
> $32k.  Here is his answer:
>  
> " The IO-390 has the same footprint as the 200 HP IO-360-A1B6, except 
> the prop governor mounts on the front left half of the crankcase, 
> rather then the rear of the accessory housing. If you are considering 
> an angle valve Lycoming style engine in the 200HP range, the 390 is 
> really the only way to go. As you have already noticed, it is 
> significantly less money to acquire and has the additional 10 HP. I 
> can see no reason the 390 wouldn't work for you, in every aspect as 
> compared to a 200HP engine, as long as the governor location isn't an 
> issue for your cowling/nacelle design.
> "
>  
> Any thoughts on this?  Can one just bolt an IO-390 instead of the 
> 200HP IO-360?  Can one just use the engine kit provided by the 
> Velocity factory, or one needs something else?
>  
> Thank you,
> Grigore
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