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Static RPM test of cross over exhaust vs Y pipe exhaust

 
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barnest(at)us.ibm.com
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PostPosted: Wed Dec 06, 2006 2:50 pm    Post subject: Static RPM test of cross over exhaust vs Y pipe exhaust Reply with quote

Just finished welding up my homemade cross over exhaust and gave it the smoke test in some static WOT runups. Here's some info....(Lyc O320 160 HP, Sterba 69X75 prop)

run # 1 with new X-over exhaust 2270 rpm ( readings are as best as I could tell on the steam gage tach)
run # 2 with the Y pipe exhaust 2220 rpm
run # 3 with new X-over exhaust 2280 rpm

so it looks like about a 50 to 60 rpm gain on the avg on a static runup. Now on to making some heat shields for the alternator, starter, etc where those pipes come close to...

Thomas [quote][b]


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