REFLECTOR: Engine Selection

[Jim Sower]

There are a couple of turbo 13Bs flying in Cozys.  They expect upwards 
of 250 hp and the turbo does wonders on the exhaust bark and damaging 
exhaust pulse.

There is now a 2.83:1 redrive available from Tracy Crook that would 
enable you to run the 13B at over 7500 rpm (v. 6000 or so) and increase 
whatever you had at 6000 (maybe 180 hp with street porting) by 25% or 
so.  That's about 220-230.  8000 rpm gives you 240 or so.  8000/2.85 =  
2800 rpm at the prop.

A brand spanking factory new 240 NA hp Renesis (sp?) engine, set up by 
Bruce Turentine can be had for about the same money as a 20B that you 
don't know where it's been and you can readily get parts for the Renesis.

I'm planning to start with an NA 13B giving about 220 hp at 7500 rpm 
(below 10,000 rpm the engine doesn't care a whit how fast it's running) 
with the 2.85 PSRU, and then work toward turbo charging.

But that's just me .... Jim S.

Joe wrote:

> I am quickly approaching a point where I have to make a decision on 
> engine selection.  My current leaning is towards a Rotary, 20B.  To 
> those who have taken the auto conversion route, I ask if you had it to 
> do over again would you have made the same decision?  Would you opt 
> for a firewall forward package or build the engine accessories 
> yourself?  On a 20B does anyone have a good idea of what the total 
> cost will run to build and install?  Atkins Rotary is the only one I 
> have found so far that will supply a firewall forward package (less 
> mount, radiators, prop) his price for a 20B is 20K, sounds high to me 
> but how does that compare with all the incidentals that come with 
> building your own?
>  
> All opinions are appreciated.
> Joe
>
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