IO 390 ouch

[czechsix]

What kind of MAP and CHTs are you running during the races?

[rvisnext]

Originally Posted by czechsix

Dan, bummer that you have to replace a cylinder, what is wrong with it and how many hours do you have on your engine?

I posted this a while back after learning from Barrett about the relative cost of 390 vs XP-400 cylinders:

http://www.vansairforce.com/communit...&postcount=126

You'd think if you buy a brand new 390 you wouldn't need to replace any jugs in a lifetime of sport flying...they should go well beyond the TBO without giving you any trouble.

If Superior and Whirlwind would get together and offer a discounted package deal that was price competitive with the Lycoming/Hartzell bundle that Vans runs during the SNF & OSH shows, I'd go with the XP-400 without a second thought due to the much lower parts replacement cost.

The XP400 and Whirlwind 74RV combo is already less expensive than the IO-390 and Hartzell OSH/Sun-n-fun special. I'm thinking this is why the most recent OSH special through Vans for the 390 came down. When I bought my XP400 last year, even if I could have gotten the 390 through the OSH special(I can't as I built an 8) it was substantially more that the 400. I bought both engine and prop from aircraft spruce.

edit: I am factoring in the Hartzell composite prop and additional spinner cost, not the metal Hartzell. If you got the metal hartzell instead it would be very close

[AX-O]

Dang Nordo. I hate to hear that.

[skylor]

Originally Posted by flynwest

I have an IO 390 in my 8 and it needs a new cylinder. How much do you think a new cylinder costs from Lycoming the only supplier for that cylinder. If you guessed over 4k you are correct. I think my 14 will have a IO 360 or 400 on it. How come you can buy a IO 390 cheaper than a IO 360 but the Jugs are almost double.

Dan,

That's definitely a big OUCH. As I recall, you saw temps around 500 on the Thursday race? Definitely detonation territory with boost. What kind of damage did you have? Guessing burned piston or broken ring/land and associated scoring of the cylinder wall?

I hope all else is well with you and your family.

Skylor

[czechsix]

Originally Posted by rvisnext

The XP400 and Whirlwind 74RV combo is already less expensive than the IO-390 and Hartzell OSH/Sun-n-fun special. I'm thinking this is why the most recent OSH special through Vans for the 390 came down. When I bought my XP400 last year, even if I could have gotten the 390 through the OSH special(I can't as I built an 8) it was substantially more that the 400. I bought both engine and prop from aircraft spruce.

edit: I am factoring in the Hartzell composite prop and additional spinner cost, not the metal Hartzell. If you got the metal hartzell instead it would be very close

I'm sure if you compare the 390 + composite Hartzell to the 400 + Whirlwind you're going to end up close on total investment because the Hartzell composite prop is way more expensive than the WW. Does Aircraft Spruce offer a combo discount with the 400 and an WW prop that I'm not finding?

Just comparing engine prices, the A/C Spruce website (http://www.aircraftspruce.com/catalo...ickkey=1172554) lists the IO-400 at $33889.00 and it appears that is an unassembled kit engine. The Vans special on the IO-390 at Oshkosh this year (https://www.vansaircraft.com/pdf/Lyc...al_OSH2016.pdf) was $31,400 (if buying the metal Hartzell, otherwise $32,400) and that's fully assembled, preserved, and shipped. When I asked Barrett this past Oshkosh about getting a comparable fully assembled 400 delivered to my door I think they quoted me something over $38K. That's a significant price difference compared to the 390 in my book...

Maybe someone out there offers a better deal than Barrett on an assembled 400?

[rvisnext]

Originally Posted by czechsix

I'm sure if you compare the 390 + composite Hartzell to the 400 + Whirlwind you're going to end up close on total investment because the Hartzell composite prop is way more expensive than the WW. Does Aircraft Spruce offer a combo discount with the 400 and an WW prop that I'm not finding?

Just comparing engine prices, the A/C Spruce website (http://www.aircraftspruce.com/catalo...ickkey=1172554) lists the IO-400 at $33889.00 and it appears that is an unassembled kit engine. The Vans special on the IO-390 at Oshkosh this year (https://www.vansaircraft.com/pdf/Lyc...al_OSH2016.pdf) was $31,400 (if buying the metal Hartzell, otherwise $32,400) and that's fully assembled, preserved, and shipped. When I asked Barrett this past Oshkosh about getting a comparable fully assembled 400 delivered to my door I think they quoted me something over $38K. That's a significant price difference compared to the 390 in my book...

Maybe someone out there offers a better deal than Barrett on an assembled 400?

It drop ships from Superior, it is fully assembled and test run. They allowed me to delete the mag's and lowered the price accordingly. They will do the same for the fuel injection as well, I decided to go with the supplied Precision system for now at least.

[czechsix]

Originally Posted by rvisnext

It drop ships from Superior, it is fully assembled and test run. They allowed me to delete the mag's and lowered the price accordingly. They will do the same for the fuel injection as well, I decided to go with the supplied Precision system for now at least.

The assembled & test run engine from Superior is the same price as the kit price on A/C Spruce's site?

[rvisnext]

Originally Posted by czechsix

The assembled & test run engine from Superior is the same price as the kit price on A/C Spruce's site?

Yes. I ordered the engine through spruce. The price was lower than spruce lists because I deleted the mag's. Superior was great to work with and made sure the engine was built how I wanted it. They test ran it, took off the mags and sent it to me. I also had them install onger studs on the governor pad. Check your PM

The price on Spruce is the assembled price, I don't think they offer a kit to individual's for their engines.

PS, sorry for thread drift

[flynwest]

It is amazing that the cylinder that got hot is good. The #2 cylinder is washboarded and too big, but both pistons are good. Hmmmm maybe an new XP 400 with a supercharger would be better and cheaper to overhaul. Hmmm. Yep going fast cost money. Fast $$$ Faster $$$$ Fastest $$$$$$$ Maybe Kevin Eldridge can make me some cool cylinders.

[flynwest]

Oh yah the MP 42" while passing the Tupperware. 39" was the target MP.