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05-29-2017, 11:18 AM
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Join Date: Apr 2017
Location: Clermont, FL
Posts: 75
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IO-540EXP 10:1 Compression
Hi All -
Lurker for a while here and first time posting. I'm looking into an RV-10 FS that owner indicates has a IO-540-EXP, 10:1 compression, 280 HP.
What are the ramifications of a 10:1 compression engine regarding reliability, TBO, other issues, etc?
I'm kinda green so any insight is appreciated.
Rob Kelly
Clermont, FL
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05-29-2017, 11:24 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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Welcome aboard
Quote:
Originally Posted by raabs
Hi All -
Lurker for a while here and first time posting.
Rob Kelly
Clermont, FL
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Rob, welcome to VAF 
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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05-29-2017, 12:36 PM
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Join Date: Apr 2017
Location: Clermont, FL
Posts: 75
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Thanks Mike, Glad to meet you all! Great community here!!
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05-29-2017, 03:01 PM
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Join Date: Jan 2014
Location: Vero Beach
Posts: 110
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10:1
I sent you a PM
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05-31-2017, 04:05 PM
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Join Date: Nov 2011
Location: Calgary, AB
Posts: 126
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IO-540 10:1 compression
I've attached a link to a kitplanes magazine article. There's a small section on compression that you may find of interest.
Something not mentioned in the article is that one of the negatives of going with increased compression is the accessory case gears take a bit more of a beating and are more likely to have to be replaced at overhaul.
http://www.kitplanes.com/issues/33_1...e_21673-1.html
__________________
VAF Donation made Feb 2020
RV-10 C-GNCX Flying and LOVING IT!
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05-31-2017, 05:45 PM
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Join Date: Jun 2011
Location: Indianapolis
Posts: 226
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Quote:
Originally Posted by raabs
Hi All -
Lurker for a while here and first time posting. I'm looking into an RV-10 FS that owner indicates has a IO-540-EXP, 10:1 compression, 280 HP.
What are the ramifications of a 10:1 compression engine regarding reliability, TBO, other issues, etc?
I'm kinda green so any insight is appreciated.
Rob Kelly
Clermont, FL
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I have an IO-540 built by Performance Aero Engines. I was told by them that there are many 540's certified in helicopters with 10:1 pistons that have the same TBO as the lower compression engines. That set my mind more at ease on keeping the 10:1's.
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Larry Anderson
Indianapolis
RV-Super 8 N88XT SOLD
RV-10 QB N38LA Flying
Helicopter Instructor Pilot
Standardization I.P.
Instrument Examiner
U.S. Army Retired
EMS Pilot for LifeLine
At IU Health Retired :-)
Although Exempt,
Donated for 2020
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05-31-2017, 08:42 PM
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Join Date: Jun 2010
Location: Buderim, Queensland Australia
Posts: 153
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Quote:
Originally Posted by CDN
I've attached a link to a kitplanes magazine article. There's a small section on compression that you may find of interest.
Something not mentioned in the article is that one of the negatives of going with increased compression is the accessory case gears take a bit more of a beating and are more likely to have to be replaced at overhaul.
http://www.kitplanes.com/issues/33_1...e_21673-1.html |
That was an interesting read, thanks for sharing?
__________________
Quentin Carter
Bushby Mustang II - 170hrs and counting
$500, if Mrs. Hun ever asks aircraft parts are $500!
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06-02-2017, 02:40 PM
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Join Date: Nov 2015
Location: Franklin, TN
Posts: 217
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Mine are 9.5:1 in my RV-10.
Other than perhaps a little more effort to keep CHT in line, I have seen no problem.
I have 500 hours on the engine so far.
I do get extra knot or two .
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Scott Martin
N430WP RV-10 - Purchased
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