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#76
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Yeah.........that's what I thought. No standard production models and no links to any evidence of such engines because the government prevented Chrysler from building such an engine.
.........OOOkaaaaaaayyyyyyyy. Thanks for your contribution. |
#77
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I'm still waiting for proof of this 30:1 compression Cummins.
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#78
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i am going to take a guess here and try to be a mediator for a sec. Knightrider is saying that Mopar indeed had the engines with a stroke more than 3.31" but they were not really production engines. Brian is asking for him to prove through production publications what he is saying.
I was not around in the 70's and i'll put money on the fact that i was not even thought of or in anyone's plans. But, because Mopar was sneaking though the cracks of the dumb arses of the gov't (no pun intended ) and changing the engine and marking them so only they knew what was going on there is on record publicaly that this went on. Therefore Knightrider's only means of proving this is to 1) porvide engines and their markings. or 2) duke it out with Brian till he believes him because there are no public paper records due to the "70's tree huggers". So the two of you does this make sense now? this is atleast how i am taking it all.
__________________
-Trevor OBK #12 1980 300SD 333,XXX miles - Totaled 1986 Mazda RX-7 212,XXX miles - impounded and auctioned off 2005 Jeep Liberty CRD Limited 33,000- SEGR, Provent, Fumoto |
#79
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Quote:
Now, it's 22.5:1. I'm still waiting for proof of that compression ratio on any production Cummins. |
#80
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Forced, i think they are taking into consideration the volume of air that is jammed in there past the natural aspiration of the engine via the turbo.
for example: the engine takes in 20 units of air N/A on start up then compresses it to 1 unit. well when the turbo is spooled up the turbo is jamming another 10 units in the same space, then the engine is compressing it to the same 1 unit as before. There is your 30:1 ratio
__________________
-Trevor OBK #12 1980 300SD 333,XXX miles - Totaled 1986 Mazda RX-7 212,XXX miles - impounded and auctioned off 2005 Jeep Liberty CRD Limited 33,000- SEGR, Provent, Fumoto |
#81
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That's the dynamic compression ratio, I'm talking static compression ratio in a non-running engine. The standard way it is measured and used in engine specs like you would put in a brochure.
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#82
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then brian answered your question in #79
__________________
-Trevor OBK #12 1980 300SD 333,XXX miles - Totaled 1986 Mazda RX-7 212,XXX miles - impounded and auctioned off 2005 Jeep Liberty CRD Limited 33,000- SEGR, Provent, Fumoto |
#83
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22.5:1 is still significantly higher than the 17.5:1 used in production engines.
I want to see some evidence of this high compression engine. |
#84
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from the time stamps we might be getting another long winded explination here soon from him. so maybe he will answer that then. his reply time tonight has been about every 30 mins
__________________
-Trevor OBK #12 1980 300SD 333,XXX miles - Totaled 1986 Mazda RX-7 212,XXX miles - impounded and auctioned off 2005 Jeep Liberty CRD Limited 33,000- SEGR, Provent, Fumoto |
#85
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I very much doubt Cummins would let anyone, even an engineer, put a prototype/experimental engine in their personal vehicle without it being confiscated and destroyed soon after. There would be a large insurance liability if the engine catches fire, causes an accident or otherwise causes harm to somebody. There would also be the risk of an experimental engine getting into the hands of a competitor like International, Isuzu, Cat, Detroit, etc.
If the 22.5:1 engine were so great as it's been described, it surely would have made it into production sometime between 1994 and 2007. EDIT: The only production diesel I can find with a 22.5:1 CR is the Oldsmobile 5.7L Diesel. Last edited by ForcedInduction; 02-06-2007 at 12:50 AM. |
#86
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Quote:
Last edited by Knightrider966; 02-06-2007 at 01:03 AM. |
#87
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In other words, you have a run-of-the-mill 1994 12valve Cummins running a higher boost pressure. I guess this goes along the same lines as your E240D thinking? EDIT: Static compression ratio is STATIC as in NOT TURNING. It is a measurement of bore x stroke relative to the remaining clearance above the piston. |
#88
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#89
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Show me a public website or brochure with the engine's compression spec displayed in something other than the Static CR. |
#90
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That's because I'm taking breaks in between downloading files of Electron tube high frequency waveforms for Mullard amplifiers. You can drop or increase the compression ratio with just a change in cam lap and lift or drop.
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