2.0 Ecotec 260HP

EcoTec 2 This is the engine I plan to use in my first build. I'd like to hear from anyone who has used one. 4 cylinder all alum. tubro very smooth running engine

Neat! I didn't see a weight listed; do you know what it is? Are you planning to run a PSRU reduction unit? Harmonic dampener?

I Don't know the weight. Trying to find it. The reduction unit I know nothing about. Are you slowing the prop or the engine?

Slow the prop down. Propellers normally turn in the mid 2000 rpm range (at full power) but an engine like that is happier at a higher rpm, so you'll need to reduce down to keep the prop turing slower than the engine.


Bruce

Looks like a nice engine, but just what is so "eco" about a supercharged 2 liter engine??

The buzzwords "eco" and "green" etc have become utterly senseless...

Do you mean you don't know about Bud's Ecotec project?
I'm really surprised:
http://www.geareddrives.com/Frank's%...20Turbine.html
Jan

Originally Posted by PTAirco

Looks like a nice engine, but just what is so "eco" about a supercharged 2 liter engine??

The buzzwords "eco" and "green" etc have become utterly senseless...

Yeah! And what about the 260 hp claim from 2 litres? 2L is about 120 cubic inches, so they're getting almost 2.2 hp per cube. I'd like to know how much boost they're using, what RPM, and what they do with the massive waste heat. And just how long the engine lasts if you try to extract that much power for five minutes.

See, the car makers like to publish these fantastic figures so young bucks will buy those cars. They don't tell you, though, that this 260 hp is an absolute peak power that you'd never get out of it on an extended basis. The engine just can't take the heat and pressures and other stresses imposed on it for very long. Indy racers use small engines that run at high boost pressure and RPMs, but they get, if they're lucky, one whole race out of them. And those are engines that were built by some finicky engineers out of expensive materials; they aren't production units found on the dealer's lot. They cost a heap of money.

For airplanes, we need an engine that will last and keep us in the air. So we have engines that give us about half a horse per cubic inch. WWII airplanes had supercharged engines that could produce closer to a horse per cube, but they had rather short TBOs; maybe 200 or 300 hours. And even then they blew up sometimes.

I put a 2.2 Subaru in a Glastar. Rated 130 hp at 5600 RPM. Used a ground-adjustable prop and RAF redrive, about 2.1:1 reduction. Prop maxed at about 2550 RPM when the engine was at 5600.

But here's the rub: At 5600, the engine wear, noise, and fuel consumption were spectacular. Piston speeds above about 30 fps cause increasing metal loss. And at high power settings the skinny little valves would burn if we didn't run pretty rich. So we would instead cruise at 4700 max, with the prop set for 5600 at full throttle in level flight (the same way other fixed-pitch prop pitches are determined), and ended up with a poor cruise speed because the prop was only turning a bit more than 2200 RPM. But a Lycoming O-320, say, rated at 150 hp at 2700 RPM, can cruise at any RPM up to 2700 for its entire certified TBO and cruise speeds will be where they should be. No auto engine could ever match that.

Lycoming and Continental do it by being conservative in their HP ratings and accepting weight penalties. Better heavy than unreliable.

Dan

You can get that from the ecotech... these things run up to something close to 400hp in racing applications... with stock internals! Hot rod Mag just upped the LSJ w/o getting into the internals. They went so far as to use a TVS 1900 supercharger, 63 lb/hr injectors, hotter cams, and a header. They ended up making 372 hp with the final setup w/o changing the intercooler setup (although it was discussed in the article they could hit 400hp if they did).

Up to 1400 Hp for racing. I know that has nothing to do with airplanes. It just proves this engine has GREAT potential for airplane applications. GM | General Motors: Powertrain: Events

it is hard to say what the boost level of the engine is, according to the calculations i did the engine needs to run 15-20lbs of boost to get 205HP, but once again that can't be accurate, there are way to many things that can be done to get that HP out of the engine, If you run bigger injectors with higher pressure lines that will increase your base HP over that of the block HP. if such is the case it can change the whole VE of the engine and thus the HP and boost.

You need to find the boost and the BSFC first before you can say that the engine runs x amount of boost for example.



1,400HP i casn't believe, that is over a 200% increase, especially for the displacement of the engine, now 400HP is the most i could see that engine putting out, and even then ITS NOT A RELIABLE 400 HP. just remember that.

Originally Posted by pepsi71ocean

1,400HP i casn't believe, that is over a 200% increase, especially for the displacement of the engine, now 400HP is the most i could see that engine putting out, and even then ITS NOT A RELIABLE 400 HP. just remember that.

I can see 1400hp in race trim. I remember back in the late 90's, when import drag racing was a craze, a couple of 1400-1600hp 4cyl tube chassis racers were making a big scene. I think a few were published in some of the 'tuner' magazines, if anyone still reads them. When you think about it, 1400hp isn't all that much in comparison to the 7000 some horsepower in Top Fuel.
Vlad

Originally Posted by Kupo Kupo

I can see 1400hp in race trim. I remember back in the late 90's, when import drag racing was a craze, a couple of 1400-1600hp 4cyl tube chassis racers were making a big scene. I think a few were published in some of the 'tuner' magazines, if anyone still reads them. When you think about it, 1400hp isn't all that much in comparison to the 7000 some horsepower in Top Fuel.
Vlad

i should rephrase, i mean reliable HP. When you do the math the numbers don't make sense unless your running past redline rpm wise, i mean 8K plus. then i could see that, but i wouldn't trust it for my life.

I don't know how they would get that amount of power. I've been involved in building PRO Mod cars using 706 cu.in. with 3 stages of nitros that were only making about 2500 HP.

Originally Posted by Alan Waters

I don't know how they would get that amount of power. I've been involved in building PRO Mod cars using 706 cu.in. with 3 stages of nitros that were only making about 2500 HP.

Forced induction and nitromethane......
Vlad

Originally Posted by pepsi71ocean

i should rephrase, i mean reliable HP. When you do the math the numbers don't make sense unless your running past redline rpm wise, i mean 8K plus. then i could see that, but i wouldn't trust it for my life.

I guess reliable is a relative term. When the engines only have to live for about 5 minutes (warm-up, staging, race) before a rebuild, you can afford to put out ungodly amounts of power.
Vlad