Largest displacement now / ever

[wings&wheels]

That is among my favorite light aircraft engines. Nothing particularly high tech about it, just a parallel valve Lycoming made from great quality parts. They have good power to weight, are amazingly efficient in fuel injected form, easy to maintain and as reliable as anything else out there.

For those who don't know, this is the exact engine you want when you land your beastly bush plane on the dry river bed and it's time to go. It will get you up, and over the nearby mountains every single time.

Prior to retirement I got to fly a 9.5L Extra NG with a larger cousin of that 540 engine. The AEIO 580 (9.5L) . 320HP, angle valve, roller cam monster. Impressive engine for sure. But it has known oil temp issues that are difficult to tame and limiting on hot days. As throttling back is the only real answer, unless you go with larger oil coolers. (often not an option for certified aircraft)

Anyway, the 580 is one super smooth engine. Gobs of power right where it is needed. The opposed piston design ensures it is smooth.

View attachment 291117

Agree, though the dual/single mag is always in the back of my mind. Way back there with other slight anxieties, but there

 

[meep]

Land. 4.7L tundra, thought the 2.7L ecoboost at full boost swallows more air… 5.4L rough equivalent.

Water. Merc 350, mmm I just loved hearing it idle in gear to trawl around at a crawl at sunset. Burrbrbrbrllebebbel.

 

[eljefino]

A 460 in my RV, rated 220 HP or so:

 

[UncleDave]

I like the little 8.4L Viper V10's. Here's the one in my sig pict and 30ft boat thats been marinized by Ilmor.

It makes 700 Hp and 650 Lb Ft.

This is what 15K of custom made CMI marine headers look like.

 

[leeharvey418]

Spruance class destroyer. Powered by four GE LM2500 gas turbine engines. Total horsepower was 80,000 shp.

Otto

Diesel

Breyton

 

[74DartSport]

Past 1973 Sedan de Ville, 500 cubic inches of gas guzzling iron.

 

[GRjdm]

Tell us how you really feel

.. feel like changing engine oil every 4-5K now that all my vehicles are turbocharged

 

[ATex7239]

A 460 in my RV, rated 220 HP or so:

Love the license plate

 

[Kira]

500 cubic inches

One more time....500 cu. in. X 16.38 ml/cu. in. [cubic inches wipes out cubic inches] = 8.190 liters

"Here comes the '819'...by Cadillac" <rejected ad slogan.

 

[ChrisMU]

Largest I ever owned: 500 ci fuel-injected V8 in my 1976 Cadillac Coupe DeVille
Largest I currently own: 460 ci V8 in my 1977 Ford F-250 Super Cab

 

[STW]

Cadillac 501 8.2 Liter then at the same time had a Chevy heavy half 454
Now 348 cu in or 5.7 Toyota

 

[addyguy]

A 3.0L DOHC V-6 in my 2003 Mazda Tribute.
Everything else has been 4-cylinder.