[rebel-builders] Viking engine

[Roland Kriening]

Ralph,

The engine is used in the Honda Fit, marine outboard and now replaces the
Ford engine in formula 4 racing. The manufacturer has been running the
engine for the last 5-6 months with that set up, and seems to have no
problems with torque or power. I have no concerns with engine itself as
Hondas are bulletproof and proven in many applications. I haven't yet
decided to go with their cowl or make my own, but could always go with a
larger air filter. Interestingly, with a warp drive prop they were pulling
480lbs. As with all new ventures, the proof will be when it is on my Rebel
and I see how it performs.

Roland
R56

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of Ralph
Baker
Sent: Friday, April 08, 2011 8:40 AM
To: rebel-builders@dcsol.com
Subject: [rebel-builders] Viking engine

Roland,
I looked at the Viking engine at Sun & Fun between tornadoes and it looked
good from the out side with two questions.
1- The compression ratio is 10.4 and that seemed high for the 87 octane
specified. My concernes were mitigated on finding the new Honda 250cc
single has 10.7 and 87 octane is specified. The EFI also closely controls
the fuel ratio to eliminate lean conditions.
2- While I'm sure the testing was done the K&N cone filter surely looks
small relative to the engine displacement and resulting required air flow
rate. We have used them for years with good success on motorcycles and no
question regarding the K&N - just the size. It looks like the selection was
more cowl dimension related.

I will look forward to your reporting on this engine as well.
Ralph Baker



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