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Post by popshot on Sept 20, 2011 16:04:24 GMT -5
My 2180 fitted with a GPAS supplied 1821 carb with a 52 by 45 pitch prop, revs at max. 2500rpm. static. I reamed out the main jet from 1.3mm to 1.5mm with no increase in rpm. I reamed further to 1.7mm and still no increase in static rpm. Can anyone of the the group advise me as to what I should do to increase the static rpm? and what static rpm. should I be getting
Thank you in advance for any advice
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Post by juergen on Sept 21, 2011 3:20:28 GMT -5
Hi ?popshot?,
if it is a Sterba prop, the static rpm should be about 3200-3600
reghards
juergen
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Post by soneraifred on Sept 21, 2011 8:57:12 GMT -5
I have a Sterba 52x46 prop on the 2180 on my IIL. It statics out at a little more that 3100 rpm, so Juergen is pretty close. The first thing I'd do is verify that your tachometer is reading correctly.
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4trade
Junior Member
Posts: 51
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Post by 4trade on Sept 21, 2011 9:03:34 GMT -5
Check your ignition timing too.
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hans
Full Member
Posts: 166
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Post by hans on Sept 21, 2011 9:30:59 GMT -5
I have a Sterba 52x46 prop on the 2180 on my IIL. It statics out at a little more that 3100 rpm, so Juergen is pretty close. The first thing I'd do is verify that your tachometer is reading correctly. My tacho reads 3100 RPM static with a Sterba 54x48 on a 2180, so I guess your suggestion about checking the tacho is something I should heed too...  With such a prop, 3100 RPM is likely a bit (too) high? Hans |
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Post by daddo2 on Sept 21, 2011 11:55:45 GMT -5
'04 Aerovee 2180 w/105ttsn....Sterba 54x46 prop = 2950rpm static, 3400rpm at 2000' WOT. Told by Aeroconversions these are optimal numbers.Aeroconversions does have a support group for the Aerovee engine. aerovee@yahoogroups.com ..........FredL
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Post by smoothmat on Sept 21, 2011 18:28:25 GMT -5
I think i remember reading on the old site that the static rpm's should also be referenced to the manifold pressure to ensure everythings good.
Matt
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With such a prop, 3100 RPM is likely a bit (too) high?