mtv wrote:An IO 550 won't burn any more fuel than an IO 470 IF you run them at equivalent power. Fuel burn is directly proportional to power output.
As I noted earlier in this thread, I've run a LOT of hours on IO 550s at 13 gallons per hour, by running lean of peak, which that engine likes a lot.
Yes, if you run the IO 550 at wide open throttle and high rpm all the time, you'll burn a lot of gas, but you don't need to do that. The advantage of that engine is that it gives you massive power for takeoff, but allows you to dial the fuel flows back very nicely in cruise.
Of course, that requires discipline on the part of the pilot, and ham fisted pilots who refuse to study up a bit on the engine will do some damage to that engine....but the same pilots will do as much or more damage to an IO 520 or IO 470......
Any of these engines will do the job. Mostly, it's a matter of how much money you are willing to spend getting there.
Good luck.
MTV
What altitude are you getting 13gph with LOP at? This does not seem like a terrible fuel flow for 300hp.
C185D wrote:So let me get this straight if I run my io-470 LOP at 21-2300 and get 9gph then a io-550 can go down to 9gph as well? You would have to run it around 17-2100 and even then I don't know if that would get it to 9gph. The 550 is a great engine but last time I checked just the STC was 2500$ not including all the extras that add up quick. The Kenmore io-520D STC is 400$ and requires new fuel flow Gauge, and tachometer. The only benefit to the 550 is performance at max gross, on floats or high DA, if money's not an issue then by all means do the 550, but IMHO it's not worth the money.
I feel as if that 9gph figure is much more attractive than the 13 or 14 figure I could potentially see with the 550. I am most likely going to be flying in Minnesota during the summer and Texas during the winter with a passenger and a dog tops.
This sparks another expensive thought. I wonder what kind of power I could make with the 470. If I recall correctly that Pinecone has a hot rod 550 with a cam and some ported cylinders.
I really wonder if I could squeeze a lil more out of the 470.Pinecone wrote:My cylinders had been cleaned up by Lycon. I'm having a hard time believing the difference it made, I can't rationalize that porting could make this big a difference. I may be pulling as much as 330-350 hp based on dynamometer tests that have been performed on similar engines.
hotrod180 wrote:pilotryan wrote:.... Right now I went through a 141 school and have about 45 hours. It is not a whole lot of experience, but it is a start to hopefully a long life full of flying. I do not have my IR, tailwheel or high performance endorsement as of now.....I am a month out of HS and a month into College. .....I wish I had a money tree....
So you're a brand new private pilot, about 18 years old, and just getting started on your college education. I don't know how much time you're gonna be able to devote to your flying and still properly pursue your education, so I'd suggest getting the airplane squared away as basically & inexpensively as possible, as soon as possible, so you can spend your available time (and money) learning to fly it & building time honing your skills.
Something else to consider....when I was a brand new student pilot, 38 years old, I saw a VW-powered KR2 for sale & thought it was just the coolest airplane ever. But as time went on, it turned out that the kind of flying I was attracted to was not KR2-compatible . The same kinda thing might happen to you-- that 185 might end up not being your "forever airplane".
Regarding the engine & panel upgrades you're talking about, I hope you do have a money tree.
You're probably talking at least $60K for the engine & prop upgrade, or maybe more. There's probably little value in your old prop & engine, so most or all of that will be out of pocket. The panel upgrade will snowball and end up being $15K or more. The total ($75K+) is probably about as much as the airplane is worth right now- maybe more. Unfortunately when you add $75K worth of upgrades to a $75K airplane, you quite often end up with something worth less than the total. So even if you can afford all those upgrades, you can easily end up upside down on it-- which isn't too good if you decide to jump ship to a Bonanza, Cirrus, or whatever.
I am going to a technical college that is maybe a minute away from where the airplane would be hangered at. I chose this school partly because it had a program that I wanted, partly because their price was dirt cheap, and mostly because I want to fly and get as many hours as possible by any means necessary.
https://www.google.com/maps/place/Hennepin+Technical+College/@44.826741,-93.462352,2406m/data=!3m1!1e3!4m5!3m4!1s0x87f618f5311bfd1b:0xff7da836ed2125a1!8m2!3d44.8352052!4d-93.4438843!6m1!1e1
I can not say that I have a money tree, but I can say I have a parent who had been around this airplane since she was born. Her being a ppl and having the connection with the airplane makes her want to split the price of repairs and upgrades 50/50 with me which I more than appreciate and want to do. I don't plan to hop over to a different airplane, as this thing should do everything I could ever want it to do but I don't want to be upside down on the prices. I paid a dollar for the plane from my gramps, and if I say I'm done with it I could possibly get more than I put into it back. The only reason why I say that is because of this listing. http://anchorage.craigslist.org/fod/5650454688.html May not be the same year airplane, but it would have practically everything that it has and look good with its polished skin!
that is what it looked like when we bought it (it is a different SN but same year and same paint).




strange... 