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Joined: Nov 2002
Posts: 3,506
Hard-core CEG'er
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Hard-core CEG'er
Joined: Nov 2002
Posts: 3,506 |
Thanks for the info.....I should have know, but i guess i just didn;t think.
Roz
3.0 SVT hybrid...all the fixens...Track/Race ready very soon!!!!!! 20,000 + miles
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Joined: Sep 2000
Posts: 118
CEG\'er
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CEG\'er
Joined: Sep 2000
Posts: 118 |
Don't know about the UR one, but I know the asp UDP is prone to wear a groove in its face, causing a crank seal leak. Steel, like membership, as its priviledges... 
Marco Tatta
98.5 SE MTX, Duratec
EGR block, indiglo gauges, custom shift boot, monsterflow intake,
Quasi dual cardoctor exhaust.
Hacksaw short shift, Momo race s carbon knob, ghetto rear strut bar, 16 inch cougar wheels with 225/50/16 kumho 712s
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Joined: Mar 2002
Posts: 1,325
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Mar 2002
Posts: 1,325 |
Thats exactly why the UR has a steel surface for the seal to ride against.
97 Contour SE MTX
K&N 3530, UR UDP, 19# Injectors, mystery mod, FMS wires, Fordchip.com chip, SVT: TB, Flywheel, clutch, exhaust
04 Grand Caravan SXT
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Joined: Aug 2000
Posts: 1,128
Hard-core CEG\'er
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OP
Hard-core CEG\'er
Joined: Aug 2000
Posts: 1,128 |
Originally posted by mangler:
Don't know about the UR one, but I know the asp UDP is prone to wear a groove in its face, causing a crank seal leak. Steel, like membership, as its priviledges...
you ever wonder why the ASP one cost half as much as the Unorthodox. hmm.. I always believed you get what you pay for.
eric
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Joined: Sep 2000
Posts: 449
CEG\'er
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CEG\'er
Joined: Sep 2000
Posts: 449 |
Originally posted by mangler:
Don't know about the UR one, but I know the asp UDP is prone to wear a groove in its face, causing a crank seal leak. Steel, like membership, as its priviledges...
Ummm, that could just be the source of my oil leak.  I was starting to think they didn't put enough RTV sealer on ...
98.5 SVT now gone ... new wheels = 2005 330i
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Joined: Sep 2001
Posts: 155
CEG\'er
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CEG\'er
Joined: Sep 2001
Posts: 155 |
Originally posted by Dan Nixon:
Originally posted by FlechaAutoSports:
seriously though, is there any documented engine failures due to a stock/udp crank pulley, I really want to know, not just being sarcastic.
I really was not being sarcastic....I think it is an unknown.
Basically, if bad crank harmonics WAS a problem, the main or rod bearings would presumably be damaged and spin. But I do not know that it is possible to tell from engine tear down WHY bearings spin. Low oil pressure may give a similar pattern of bearing wear (because crank whip really results is misdistribution of the oil film). There were changes made to later Duratec oil systems as well as the DMD and oil starvation issues may play a role. About 2 years ago, I thought it was all oil starvation and did some research & took a pole on CEG. Only about 1/3 of the spun bearings occured in setting where you would expect starvation..low oil or hard right turn. Now, maybe the damage occured earlier and was not associated wth events at the time. Soon after, Judge (who work at the OEM damper supplier) reported engines were lost on the test stand (with controlled oil delivery) and that crank whip was suspected..which ultimately resulted in the DMD.
So anyway, thats what I have learned & hope I got the details right. Judge/other correct me if I am wrong.
Bearings do spin in Duratecs..just not clear if it is crank whip, oil starvation, or as one CEGer has proposed the weak nature of PM rods.. Personally, I think a combination..crank whip in some cases, others seem clear cut oil starvation. But, thats is speculation...and I conceed it is possible that DMD will not protect engines. But, there are other ways to improve revability without lossing the DMD. I have the aluminum P/S steering pulley (1 pound lighter and 15% underdrive..makes a noticable dif..also UD alt pulley avail and electric H2o pump..though expensive0
Please elaborate on the PM Rods.
Thanks
Geoff C. Turner
99 Black SVT -mine
99 Blue SE V6 ATX -mom's
96 Black SE MTX -sister's
All with 278mm front rotors
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Joined: Jun 2000
Posts: 1,469
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Jun 2000
Posts: 1,469 |
PM rods = "powdered metal" rods = sinter forged rods. Stonger than cast rods (used in many domestics), weaker than billet rods (used in some high po cars, Forced induction typically). One knowlegeable CEGer suggested that the stretching forces were altering the shape of these softer rods causing them to contact bearings assymetrically inducing wear (if I understood him correctly). Not saying this is real...it was a therory proposed.
1999 Amazon Green SVT Contour (#554/2760)
"People demand freedom of speech as a compensation for the freedom of thought which they seldom use."
-Soren Kierkegaard (as posted by Jato)
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Joined: Jan 2003
Posts: 157
CEG\'er
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CEG\'er
Joined: Jan 2003
Posts: 157 |
I just finished installing the DMD. I took my car for a test drive and I really didn't feel much of a difference. Maybe I just need more mods on the ol car.
98 SVT E0 T-Red
E1 engine
resonator removed
K&N w/ MAF adapter
20% tint
Ford Trans. cocktail
Ford 9mm Racing Wires
DMD
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Joined: Aug 2001
Posts: 5,810
Hard-core CEG'er
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Hard-core CEG'er
Joined: Aug 2001
Posts: 5,810 |
While we are reviving this old post, I think this stuff on weak PM rods is a load of bunk.
The powdered metal process was introduced to make complex parts with the same physical properties completely through the part. There are many advantages to the PM part, not the least of which is resistance to distortion and a probable increase in fracture toughness. The powder fragments are compressed into the shape of the part and then heated up until they fuse together. They will tend to be more brittle than regular cast or forged rods. Any load that is stong enough to break them more than likely WILL break them rather than be dissipated by flexure. The cast and forged rods can bend a little more elastically to spread out the loading of the force.
So, powder metal parts should be able to offer superior properties to cast rods, but ultimate strength is still less than that of good forged rods.
If this means anything, then it is highly unlikely that distortion of the rod is causing the bearings to spin.
Maybe they just need to increase the detent tab on the bearing that locks in it place within the rod?
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
See My Mods
'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black
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