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Location:
Finland
Registered:
June 2002
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no shame in loosing out to a diesel on a 1/4ml drag
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Thu, 03 October 2002 11:25
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(This maybe should perhaps go into War Talk department, I'll toss this one here anyways)
Besides tinkering with petrol Toyotas, my other secret love is Turbo Diesels, mainly German ones. (Jap diesel tech is no match to a German engineering).
Have a read what I read on one American diesel enthusiasts discussion forum.
I just don't know how to take this.
[NOTE - this is real, this is not a flame, diesels can be tricked out to haul ass big time]
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..... I spoke with Sparky, who is quite knowledgeable and crewed on the 6.9 pickup that runs 9's in the quarter mile. He gave me a brief insight into the engine, which is as follows:
7.3 block sleeved down to 6.9, twin turbos @ 147 psi, diesel only with water injection, 6" girdle, 6000 rpm, double bolted flywheel with three hardened pins, C6 trans, Strange rear end. He said that the block flexes so much that they have to use rubber freeze plugs!
I'll try to get in contact with the owner and find out more. We might want to think about taking up a collection and inviting the builder to visit us and hold a seminar. Maybe at next year's NorCal? Or, better yet at a Gustapo Meeting.
Seeing/hearing about these sub 10 second diesel pickups (three that I know of, probably many more) is making me lean towards building a drag (or street/drag) truck. The building costs would be similar, and there would be far more opportunities to play.
..................
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Location:
Brisbane
Registered:
May 2002
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Re: no shame in loosing out to a diesel on a 1/4ml drag
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Thu, 03 October 2002 11:43
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Holy crap, 147psi!! They must be staged turbos to get that sort of pressure. And how the hell do you make a diesel rev to 6000??
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I supported Toymods
Location:
Sydney
Registered:
May 2002
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Re: no shame in loosing out to a diesel on a 1/4ml drag
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Thu, 03 October 2002 11:47
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There's hope for the cruiser yet!!!! 
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Location:
Finland
Registered:
June 2002
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Re: no shame in loosing out to a diesel on a 1/4ml drag
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Thu, 03 October 2002 13:04
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That boost is not a typo. Regularly tractor pulling diesel engines have 10 to 12 bar boost pressures, so 147psi is in the ballpark.
Compresson ratio of various diesels usually lie in the 1:20 neighbourhood. My old VW Golf has a 1:23, newer TDI VW's have 1:19,5.
Competition diesel's have about 1:10 to 1:13. That's why they can run phenomenal boost pressures. When compression cycle is completed, pressure in combustion chamber does not necessarily differ much from normal factory stock pressure levels.
(Well, there always is some safety margin left so tuners usually go past that pressure level anyhow).
In practice anyways it's possible to have terrible boost and engine combustion chamber will not see elevated burning pressures.
-A.
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: no shame in loosing out to a diesel on a 1/4ml drag
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Thu, 03 October 2002 23:21
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i once got my old diesel van up to 6000rpm... didnt suond too healthy tho (the main bearings went a few months later).. note it was my first vehicle and i was only 17 and stupid.
man i loved that thing... could hold 20 mates easily, a few eskies, shelf space for whatever you felt like carrying, sub box etc etc,..... OH THE SPACE!!!
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