Forum,
I'm looking seriously at building a EG33 engine for a Bearhawk (I know it's not an RV, but I live in Alaska for Pete's sake) because I would much rather have a liquid cooled setup for comfort and reliability in cold weather.
I don't much like the complete kits from Egg or others so I was thinking about buying an overhauled engine and a PSRU. I found this engine on ebay and like what the guy is doing:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33615&viewitem=&item=130225289996
You get the idea.... The rods and pistons are shown on his website:
http://www.ecutune.com/svx_rods.htm
http://www.ecutune.com/svx_pistons.htm
http://www.ecutune.com/svx_bearings.htm
These engines are designed for high rpm racing under boost.
Now I know that building a racing engine with race engine ports and camshaft timing is not a good idea for aircraft usage, but I think building racing engine rotating assembly is a good idea because it has much better tolerances, oiling, and balance. I called the guy and talked to him about it and he said he would run a totally different porting and cam timing package in an airplane engine. He said he would put the peak torque around 5000-5500 rpm. He also seemed to know this engine very well.
Now for my questions:
1. Is this engine worth the money to get the tighter tolerances, stronger/lighter rods/pistons, arp studs, grooved deck etc?
2. How complex is it to add a small turbo to the engine for a couple of lbs of boost? I don't want anything crazy, just want a little more torque and perhaps economy.
3. Is expecting 230hp for take off and 175hp continuous over working this engine?
4. Which PSRU do I run? I've heard good things about the autoflight one out of New Zealand.
5. What is the fuel economy like compared to a lycombing? Can I expect to see a little better GPH given that I'm not cooling the engine with the fuel?
6. Which is the best engine computer to use? Real world or SDS?
That is enough questions for now....
Thanks,
schu
"
I'm looking seriously at building a EG33 engine for a Bearhawk (I know it's not an RV, but I live in Alaska for Pete's sake) because I would much rather have a liquid cooled setup for comfort and reliability in cold weather.
I don't much like the complete kits from Egg or others so I was thinking about buying an overhauled engine and a PSRU. I found this engine on ebay and like what the guy is doing:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33615&viewitem=&item=130225289996
ECUtune engines are built to exacting specifications and fully documented. These engines are built to happily run high torque at high rpms.
High silicon aluminum bearings further enhanced with the same ct1 anti- friction coating used by nascar teams are used for both the mains and rod bearings. All bearings are caged and each crank pin and journal is machined to achieve exactly the desired oil clearance within a tolerance range approximately 20 times more acurate than factory specifications. Each bearing bore, journal or pin diameter, and resulting oil clearance is included in the documentation provided to the purchaser. Sets of highly ballanced H-beam rods with ARP 2000 rod bolts put together especially for ECUtune are used.
You get the idea.... The rods and pistons are shown on his website:
http://www.ecutune.com/svx_rods.htm
http://www.ecutune.com/svx_pistons.htm
http://www.ecutune.com/svx_bearings.htm
These engines are designed for high rpm racing under boost.
Now I know that building a racing engine with race engine ports and camshaft timing is not a good idea for aircraft usage, but I think building racing engine rotating assembly is a good idea because it has much better tolerances, oiling, and balance. I called the guy and talked to him about it and he said he would run a totally different porting and cam timing package in an airplane engine. He said he would put the peak torque around 5000-5500 rpm. He also seemed to know this engine very well.
Now for my questions:
1. Is this engine worth the money to get the tighter tolerances, stronger/lighter rods/pistons, arp studs, grooved deck etc?
2. How complex is it to add a small turbo to the engine for a couple of lbs of boost? I don't want anything crazy, just want a little more torque and perhaps economy.
3. Is expecting 230hp for take off and 175hp continuous over working this engine?
4. Which PSRU do I run? I've heard good things about the autoflight one out of New Zealand.
5. What is the fuel economy like compared to a lycombing? Can I expect to see a little better GPH given that I'm not cooling the engine with the fuel?
6. Which is the best engine computer to use? Real world or SDS?
That is enough questions for now....
Thanks,
schu
"