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Engine Specific Info and Questions => TDI Engine -General Info => Topic started by: neich on June 07, 2004, 09:57:10 am
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Hi,
I have had too many problems in the past (and present !) with turbos in my diesel cars (all IDI) that I was wondering if it would make sense a non-turbo TDI. If I just could get the minimum power it woul make a much simpler engine.
For example, I was wondering if a 2.5TDI (AEL) engine (140hp) could get 90-100hp without turbo. I guess that I would have to remove the electronics and install a mechanical pump. But I guess that this would be a forever-engine, and VERY reliable.
Sorry, to many free time ... ;-)
Nacho
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Search the web for SDI,
it's the non-turbo version of the VW's direct injection diesel engine.
I think the current model (MY 2004) SDIs are rated at 68hp.
Of course, they're in Europe, not in North America.
-Dave
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Hi,
I have had too many problems in the past (and present !) with turbos in my diesel cars (all IDI) that I was wondering if it would make sense a non-turbo TDI. If I just could get the minimum power it woul make a much simpler engine.
For example, I was wondering if a 2.5TDI (AEL) engine (140hp) could get 90-100hp without turbo. I guess that I would have to remove the electronics and install a mechanical pump. But I guess that this would be a forever-engine, and VERY reliable.
Sorry, to many free time ... ;-)
Nacho
That just seems like a lot of trouble for something that honestly shouldn't be a problem...not to mention you don't need to suffer the plague we call N/A diesels. Turbos have a history of being VERY reliable on gas motors (owner neglegene is the #1 killer), it should be even better on a diesel. The Volvo guys usually get over 100k out of a T3, so you must be getting inferior products to have such issues. Care to elaborate on the problems you've had?
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maybe you dont change your oil enough? Do you drive it hard? The turbos on the IDI's should last as long as the engine :D
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There's a heck of a lot of old MB turbo diesels on the road still, some with well over 250K miles. There are also a lot of late '90s Cummins and Powerstrokes with high mileage that still have functioning turbos. Not to mention all the Peterbilts, Volvo, Freightliners, etc.
Mine is a 1980 with 175k and the tubo works beautifully. I swapped a quantum 1.6TD with 125k into a Rabbit about 2 years ago, it too ran well. My '01 TDI has 62k miles, no problems with the turbo.
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I can't understand why anyone would want to subject themselves to a naturally asthmatic diesel. Diesels are made for turbo's. Due to the less than optimium cam lift and duration dictated by valve/piston clearance, forced induction is the only way to boost power. The relatively low exhaust temp gives diesel turbochargers exceptional life. A diesel turbo is one of the most reliable engine parts.
Gas car mechanics like to replace the turbo whenever there is any problem with the engine (they also like to replace injection pumps, but thats another story) that's how turbo's get a bad reputation. I've never seen one fail on an IDI diesel, other than from foreign object damage or running insane boost.
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I've never seen one fail on an IDI diesel, other than from foreign object damage or running insane boost.
Quick TD, what counts as "insane boost" for you on an IDI diesel?
A vanagon TD-conversion "guru" guy recently stated in another forum that the constant running of the small KKK turbos found on AAZ engines at 14 - 15 psi tended to warp their shafts. I suppose these engines would be in boost more often on such a heavy vehicle, relative to the cars. But still, it's kind of concerning, as I didn't really think 14 - 15 psi was "insane boost", even for the small turbos. I suppose this problem would be particularly apparent if you drive in higher altitudes, where the air is less dense, since I would expect the turbo shaft to have to turn faster in order to maintain the same boost pressure as at lower altitudes.
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I would qualify anything over 25psi insane. I run 14-15 with a K03 and have done it for a few years and 150000km. Nothing bad to report. The vanagon could be a more severe "test" though...