Brett & Tiana wrote:

Hi all, me again. Still working on the same relative merits report comparing the 13B, Subaru EJ-22 (Stratus), and the Belted Air Power 4.3L V6, and looking
for some confirmation of the accuracy of my hp and torque figures.

My comparisons heavily favor the 13B based on info gathered over several years, but accuracy on my part is crucial and the sources of some of these figures
are sketchy since they rely on info from the installation suppliers.

For example, the April 2002 issue of Kitplanes lists the hp and torque figures for the Stratus EJ-22 as being 180hp @ 5900rpm and 157ft-lbs of torque at
4600rpm; The BAP V6 is listed as producing 180hp @ 3700rpm and 375ft-lbs of torque at 3600rpm; and the Atkins 13B is listed as producing 160hp at 5500rpm and
159ft-lbs of torque at 5200rpm.

Dave Atkin's figures sound accurate, and assuming that the fine folks at BAP and Stratus aren't bald-faced liars I have accurate info to go on. One question I
have is this: We know the rotary is capable of 180hp without internal mods, but in examples such as Tracy's at what rpm does this occur? I'm aware that the
stock engine in automotive configuration produces peak hp at 6500rpm, but does this hold true in aircraft config?

I plan to compare all three in my report at equal hp settings of 180hp if possible, and many who will read it are pro-Lycosaurus types.
Can any of you back up this info (or contradict it), and do you have a graph confirming any discrepancies?
Again, thanks in advance for any input you may have!

Brett.

Hallo Brett,
In order to make any sensible comparison between those engines, such as bmep, you also need the total displacement of each engine.

Regards,
Rolf Pfeiffer

 
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