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01-09-2010, 02:02 PM
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Join Date: Mar 2007
Location: Cambridge MA
Posts: 131
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Based on what I've read the IO-375 is a parallel valve 360 with a stroked crank (or possibly a new crank with a longer stroke) and "low compression" pistons (or pistons that would be low compression if fitted to a 360). The reduced height of the pistons makes room for the longer stroke without taller cylinders (and of course the longer stroke brings the compression back up).
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Student pilot and RV wanna-be
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01-09-2010, 04:25 PM
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Join Date: Mar 2008
Location: Perth, Western Australia
Posts: 30
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Check your PM's
Glenn,
Check your PM's. Mobile phone number sent.
Rob
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01-09-2010, 04:37 PM
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Join Date: Aug 2008
Location: Sandy Valley,Nevada 3L2
Posts: 151
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TMX360
Put two TMX360's in two RV7, runs smooth and plenty of power, Used Van's FP props on both. Good performance for me. Have you noticed how close the price between IO and carbs. is now. Seems carb. prices have sky rocketted.
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RV6A, RV7, RV6 Wing
Living with my 6A at 3L2 near Las Vegas
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01-09-2010, 09:27 PM
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Join Date: Nov 2009
Location: somewherville
Posts: 160
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Quote:
Originally Posted by agough277
Put two TMX360's in two RV7, runs smooth and plenty of power, Used Van's FP props on both. Good performance for me. Have you noticed how close the price between IO and carbs. is now. Seems carb. prices have sky rocketted.
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can I ask what kind of cruise numbers you get with the FP?
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01-10-2010, 11:16 AM
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Join Date: Aug 2008
Location: Sandy Valley,Nevada 3L2
Posts: 151
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Quote:
Originally Posted by philip_g
can I ask what kind of cruise numbers you get with the FP?
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I sold the 7 2yrs ago but was getting better cruise than my 6A with FP and it gets 180mph cruise easy on a 160hp. As I recall the 7 did better than 190mph. The important thing is it did well in the heat of Vegas.
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RV6A, RV7, RV6 Wing
Living with my 6A at 3L2 near Las Vegas
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01-10-2010, 03:06 PM
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Join Date: Nov 2009
Location: somewherville
Posts: 160
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Quote:
Originally Posted by agough277
I sold the 7 2yrs ago but was getting better cruise than my 6A with FP and it gets 180mph cruise easy on a 160hp. As I recall the 7 did better than 190mph. The important thing is it did well in the heat of Vegas.
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thanks!!!!!
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01-10-2010, 04:22 PM
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Join Date: Jan 2007
Location: Stuart, FL /Hartford, CT/Virgin Gorda,BVI
Posts: 3,122
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Lycoming Thunderbolt
get a genuine lycoming thunderbolt experimental engine ordered just as you like it. about $25,000. roller lifters, flowed heads, balanced, ect.on my second engine. first went 3,150 hrs. have consumed about 28,000 gallons  of mixed auto fuel / 100LL in the past 10 years. fly more. turbo
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TURBO YES =VAF= Payed Jan2019
Ed D'Arcy
RV6-A 5,200+ hrs, R-44 1,600 hrs, Helicycle 320 hrs, gyro sold,35,000 miles flown in 2015 
Stuart, Fl / S WINDSOR,Ct / Virgin Gorda, BVI - under major repair from hurricane damage
VAF #840 EAA AOPA FAC FABA QB SPA
addicted pickle ball player
https://i.postimg.cc/tn3h4svg/IMG-3101.jpg
Last edited by turbo : 02-08-2010 at 07:19 AM.
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01-10-2010, 05:46 PM
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Join Date: Feb 2006
Location: Sydney, Australia
Posts: 251
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Genuine Lycoming next time ...
My RV7A has been flying for just under 12 months. In that time I have discovered that ECI Titan cylinders run hotter than Superior or Lycoming which can be an issue with RV's. In the last few years we have seen Superior go broke and re-appear. ECI has had numerous recalls on cylinders.
When you buy an engine from a shop that just assembles engine parts there will often be two parties to deal with in the event that you need your warranty - the builder and the manufacturer of the parts.
IMO - one thing you really need to consider when purchasing an engine is the company's ability to make good on a warranty claim. If it is just one failed engine pretty much all of them will put you right. However, what if they have 100 engines with faulty cylinders or crankshafts and the manufacturer won't or can't replace them?
Many of these engine shops have excellent reputations and they do great work. For many people that is enough, but I?d suggest none of them would survive a situation like I describe above. Before Superior went broke many of us would not have even considered the chances of this happening, Today you would have to give it a second thought.
Many people make a big deal out of ECI?s anti-rust cylinder technology. How much benefit that is I don?t know. Traditionally the camshaft has been the area of concern on these engines but now everyone has roller cams, so camshaft and lifter issues should be greatly reduced. I do know I have to replace all four cylinders in my engine before 350 hours thanks to ECI, and my hanger mate currently has four cylinders that must be retired at 2000 hours. So for me, the promise of a better engine has not been realised in ECI.
Knowing what I know now, if I did things over again I would buy the genuine Lycoming Experimental from Vans. If you have a need for your warranty there is only ?one throat to choke?. Lycoming engines have been largely free of the issues that have plagued the other suppliers for the last 3-5 years and to me they seem like they are here to stay as a company. Also, Van's engines fit with their FF kit. If you want to get in the air quickly and cheaply this is the way to go.
I'd reject any engine unless it has a warranty that begins at first flight. Unless you have built a few times it will take you longer than you think to finish the airframe and you don't want an engine without warranty for your first flight.
Cheers
Richard
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