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#11
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New diesel engine from Subaru...
On Mar 19, 5:19 pm, "Capt. Geoffrey Thorpe" The Sea Hawk At Wow Way
D0t C0m wrote: "jan olieslagers" wrote in message ... schreef: http://www.edmunds.com/insideline/do...ticleId=124553 2L TDIO, All aluminum block/head, boosted, intercooled, 258 pound-feet of torque @ 1,800 rpm. Probably a terrible engine for a car. But for an airplane.... Haven't found the weight yet. Not the first I hear about it. As I understand it is a modification of their petrol boxers so the weight should be comparable. I thought GM had killed the "gas engine converted to a diesel" market. The typical 10,000 mile (or so) TBO didn't go over well with the public. -- Geoff The Sea Hawk at Wow Way d0t Com remove spaces and make the obvious substitutions to reply by mail When immigration is outlawed, only outlaws will immigrate. Because half-assed engineering in the 70s has sooo much to do with this engine. You know those Coleco vision games really sucked too. And bean bags were such a lame technology, I can't imagine anyone buying a chair ever again... And Disco? WTF was that? I'll never use a radio again... ever.. -Matt |
#12
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New diesel engine from Subaru...
On Wed, 19 Mar 2008 17:19:56 -0400, "Capt. Geoffrey Thorpe" The Sea
Hawk At Wow Way D0t C0m wrote: "jan olieslagers" wrote in message ... schreef: http://www.edmunds.com/insideline/do...ticleId=124553 2L TDIO, All aluminum block/head, boosted, intercooled, 258 pound-feet of torque @ 1,800 rpm. Probably a terrible engine for a car. But for an airplane.... Haven't found the weight yet. Not the first I hear about it. As I understand it is a modification of their petrol boxers so the weight should be comparable. I thought GM had killed the "gas engine converted to a diesel" market. The typical 10,000 mile (or so) TBO didn't go over well with the public. VW proved it could be done well, as did Peugot years ago IIRC. GM is proved GM engineers have trouble getting it right the first time, and management doesn't allow second mistakes??? -- Posted via a free Usenet account from http://www.teranews.com |
#13
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New diesel engine from Subaru...
On Wed, 19 Mar 2008 22:29:44 +0100, Philippe Vessaire
wrote: clare at snyder dot ontario dot canada wrote: http://www.edmunds.com/insideline/do...ticleId=124553 2L TDIO, All aluminum block/head, boosted, intercooled, 258 pound-feet of torque @ 1,800 rpm. Probably a terrible engine for a car. But for an airplane.... Haven't found the weight yet. 178kg 392lbs How big a prop do you want to spin? with 258 torque available at 1800, assuming a fairly flat power curve you have 135 HP at 2800 RPM. Not bad for what would likely turn out to be a 300 lb engine stripped for flight. Realy, I don't know but I don't think you have 135Hp@2800rpm. 150hp@3600rpm in the car... For TBO: think Thielert.... 258 ft lbs X 2800 rpm = 722400 / 5252= 137.54. The torque will hold well past 2800 RPM on a turbo Direct Injection Diesel. Real fat torque curve. I'd be very surprised if there was less than 145 at 3600 (Math says 176 if the torque holds, I figured 85% of max torque at 3600, for 150 HP) -- Posted via a free Usenet account from http://www.teranews.com |
#14
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New diesel engine from Subaru...
In article 1310142.npAD8lHYCv@GastonCoute,
Philippe Vessaire wrote: clare at snyder dot ontario dot canada wrote: http://www.edmunds.com/insideline/do...ticleId=124553 2L TDIO, All aluminum block/head, boosted, intercooled, 258 pound-feet of torque @ 1,800 rpm. Probably a terrible engine for a car. But for an airplane.... Haven't found the weight yet. 178kg 392lbs How big a prop do you want to spin? with 258 torque available at 1800, assuming a fairly flat power curve you have 135 HP at 2800 RPM. Not bad for what would likely turn out to be a 300 lb engine stripped for flight. Realy, I don't know but I don't think you have 135Hp@2800rpm. 150hp@3600rpm in the car... For TBO: think Thielert.... What are Thielert's TBO like? |
#15
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New diesel engine from Subaru...
clare at snyder dot ontario dot canada wrote:
How big a prop do you want to spin? with 258 torque available at 1800, assuming a fairly flat power curve you have 135 HP at 2800 RPM. Not bad for what would likely turn out to be a 300 lb engine stripped for flight. Realy, I don't know but I don't think you have 135Hp@2800rpm. 150hp@3600rpm in the car... For TBO: think Thielert.... 258 ft lbs X 2800 rpm = 722400 / 5252= 137.54. The torque will hold well past 2800 RPM on a turbo Direct Injection Diesel. Real fat torque curve. I'd be very surprised if there was less than 145 at 3600 (Math says 176 if the torque holds, I figured 85% of max torque at 3600, for 150 HP) for typical automotive diesel, the torque curve is flat only in the range of 1500-2500 rpm. More rpm less torque... You may reprogram the ECU and give a flat curve for higher rpms, it's the way Thielert use to have a 135hp , 1700cm³ engine from a 95hp automotive engine. Nerver over torque this type of engine but it may over rev and keep long life. By -- Volem rien foutre al païs! Philippe Vessaire Ò¿Ó¬ |
#16
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New diesel engine from Subaru...
On Thu, 20 Mar 2008 08:26:54 +0100, Philippe Vessaire
wrote: for typical automotive diesel, the torque curve is flat only in the range of 1500-2500 rpm. More rpm less torque... This is a TURBO diesel, whick keeps the efficiency up for a wider band. (and it's not hard to change the turbo if you need a different "map" You may reprogram the ECU and give a flat curve for higher rpms, it's the way Thielert use to have a 135hp , 1700cm³ engine from a 95hp automotive engine. Nerver over torque this type of engine but it may over rev and keep long life. By -- Posted via a free Usenet account from http://www.teranews.com |
#17
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New diesel engine from Subaru...
"Peter Dohm" wrote in message ... "Capt. Geoffrey Thorpe" The Sea Hawk At Wow Way D0t C0m wrote in message ... "jan olieslagers" wrote in message ... schreef: http://www.edmunds.com/insideline/do...ticleId=124553 2L TDIO, All aluminum block/head, boosted, intercooled, 258 pound-feet of torque @ 1,800 rpm. Probably a terrible engine for a car. But for an airplane.... Haven't found the weight yet. Not the first I hear about it. As I understand it is a modification of their petrol boxers so the weight should be comparable. I thought GM had killed the "gas engine converted to a diesel" market. The typical 10,000 mile (or so) TBO didn't go over well with the public. I've heard many times about how bad they were, but I still don't know the actual cause or just what tended to break or wear out. The only specific that I can personally recall was that the air intake placement made it possible to injest water on some models. I believe that also heard that the rings and cylinders had a shorter than normal life, anound 120K miles, but only heard that from one user. So any further enlightenment is welcome. Peter Thanks to those who responded. That was great information about the need for proper "care and feeding" for any of us who switch to diesels. Peter |
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