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Author Topic: how to blow up a diesel?  (Read 53353 times)

Reply #30January 11, 2007, 02:03:16 am

fatmobile

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« Reply #30 on: January 11, 2007, 02:03:16 am »
It would be good to know how many RPMs these things can go before they pop.
 Can't find your limits until you exceed them ya know.
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #31January 11, 2007, 04:06:51 am

jtanguay

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how to blow up a diesel?
« Reply #31 on: January 11, 2007, 04:06:51 am »
Quote from: craiggroombridge
I think this is a total waste of time I just got my n/a running 5 days ago and here someone is trying to kill one what a waste


yeah... these engines would make excellent generators...


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Reply #32January 11, 2007, 07:00:53 am

burn_your_money

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how to blow up a diesel?
« Reply #32 on: January 11, 2007, 07:00:53 am »
I agree that it is a total waste, but it's not my engine and if he has it set in his mind to blow it up, he may as well do a good job of it :twisted:

I'd love to buy the engine off of him, I need a few NAs
Tyler

Reply #33January 11, 2007, 08:11:12 am

jtanguay

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how to blow up a diesel?
« Reply #33 on: January 11, 2007, 08:11:12 am »
i was actually considering the feasibility in making a generator out of either a turbo or an N/A... probably better to sacrifice an n/a :)

the exhaust heat and engine heat could be used to heat the house, and the generator could be used to store electricity in batteries, and run household power.  would be a great backup source in case of emergencies.  these motors can put out a LOT of heat!!!


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Reply #34January 12, 2007, 12:36:45 am

LeeG

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how to blow up a diesel?
« Reply #34 on: January 12, 2007, 12:36:45 am »
grind 2 exhaust lobes off, gut 2 injectors, connect those two injectors to an air tank, add a pressure release and viola, air compressor.  

Blowing motors is a long time VW thing.  Back when GTGs used to be called 'bug ins', you could pretty much count on someone bringing along an old aircooled motor to run to destruction.  If you really want to blow it, in the interest of science: put a EGT on it and slowly increase fuel until you find the critical temp.
'97 Passat TDI

Reply #35January 12, 2007, 12:45:13 am

fatmobile

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« Reply #35 on: January 12, 2007, 12:45:13 am »
Critical temp for an NA might not apply to a TD engine.
 I say hook a tach up to it and let us know what the maximum RPM is.
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #36January 12, 2007, 03:07:47 am

jtanguay

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how to blow up a diesel?
« Reply #36 on: January 12, 2007, 03:07:47 am »
Quote from: LeeG
grind 2 exhaust lobes off, gut 2 injectors, connect those two injectors to an air tank, add a pressure release and viola, air compressor.  

Blowing motors is a long time VW thing.  Back when GTGs used to be called 'bug ins', you could pretty much count on someone bringing along an old aircooled motor to run to destruction.  If you really want to blow it, in the interest of science: put a EGT on it and slowly increase fuel until you find the critical temp.


i'm liking that idea... a diesel powered compressor!!!  

and as for blowing the engine... i agree that it 'should' be done scientifically.. find the breaking point of the motor and share results :)

hehe hook up an rpm sensor, and make the governor a solid piece... wonder how many rpm's these motors can take  :twisted:


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Reply #37January 13, 2007, 03:27:46 am

LeeG

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how to blow up a diesel?
« Reply #37 on: January 13, 2007, 03:27:46 am »
Your right.  A simpler version of your better idea would be to grind off intake AND exhaust lobes and replace both valve springs with very light springs so that both valves are sucked open on down strokes.  You'd also need a custom 2 cylinder exhaust manifold.

I have a old fairbanks morse 4 stroke engine that only has one cam lobe which is used to open exhaust....intake is sucked open as above.
'97 Passat TDI

Reply #38January 19, 2007, 10:36:01 pm

Master ACiD

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how to blow up a diesel?
« Reply #38 on: January 19, 2007, 10:36:01 pm »
ive done this to plenty of old junkers that wouldnt sell for $50 locally. normally i would never blow an engine that had any value.

diesels are some tough things to kill. i had one which was hit in the front end, the car was junk, the engine was ticking badly, radiator leaked all the water out. the engine wouldnt die even after installing a fuel line to the intake and running it to the passenger area where my assistant sat with 3 cans of ether. that exhaust smoked ORANGE but the engine wouldnt blow after 3 cans. i had never seen an orange coloured diesel exhaust before, and that engine had some wicked power running on ether. it ran like it had a turbo. we finally killed it by just running around town at full throttle in 1st and 2nd gear. the engine finally locked up, but i popped the clutch and unfroze it and got home anyways. decided to call it quits after the fire truck came because the thing was smoking so bad out the exhaust and off the overheating block/head. you know its bad when the fire truck pulls you over to tell you youre car is on fire. (although it wasnt). i just told them it was a diesel, they do that.

on one engine i wired it to full throttle cut off the upper rad hose and walked away. 15 minutes later it quit running. my infrared tempature gun got a 600 degree reading off the fuel injector. after it cooled off that engine fired up a few more times and ran for 15 minutes at a time untill it got hot and stopped. never did kill the engine but it made some awfull racket the last time i ran it.  it sounded like sledgehammers beating away in the block. 600 degrees cant be good for th thing, but it never actually blew up. it would just get hot and quit running.

Reply #39January 20, 2007, 12:08:02 am

745 turbogreasel

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how to blow up a diesel?
« Reply #39 on: January 20, 2007, 12:08:02 am »
I ran a faulty fuel injector in my new head....
about 30 minutes later, the fuel spray burned into the water jacket with a loud POP! :roll:

 

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