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This has been debated in past forums ad nauseum. Yes, the laws of physics state that adding a UDP is a bad thing. However, to date, to the best of my knowledge, there has not been 1 documented failure for this reason.
Do not take this as an endorsement of UDP's-it's not. My experience has been that the BIGGEST weakness/cause of Duratec destruction is oiling failure.
Technical Director/Co-Owner Performance Fords-check out our new throttle body service
95 SE with lots of custom 1 off mods. All design, fabrication and installation by owner.
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Cant agree,some time ago I put up some pics of main & rod end bearings,no oil failure on these engines as they were static in a dyno cell....no 'long turns' either....just because you can't see or feel anything this does not mean the matearial,the crank, is not suffering from fatigue.Without stripping and doing regular met lab tests for microstructure you will see,feel or hear nothing.... 
V6 MTX
'Don't p**s up my back then tell me it's raining!!!"
'Its only nuts & bolts!'
'If I build it,fix it,upgrade it or modify it...MAYBE they will come....!
Haines Motor Sports Inc,
Dealer for 'Quaife America' & 'Autotech Sport Tuning'
SOLE USA Dealer for the American Axle 'AUSSIE BAR'...
Get a Turbo for you Zetec from HMS Inc...by 'The Demon' ...www.DemonDynamics.co.uk
..don't talk about it DO IT !!!
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Terry: Can you tell me more? How do you know that it wasn't oiling failure? Simply because it was mounted on a dyno? Did it have a site gauge in the pan to determine if the oil was being retained in the top end? Someone posted a while back that even at 5K RPM, there was only 1/2 qt. left in the pan. I would think that high G force corners are a contributing factor, but the oiling system is certainly a problem.
I can tell you that wrecker Duratec motors are very hard to find here as they get snapped up quickly. They're going in ATX and MTX cars. Always oiling failure.
Technical Director/Co-Owner Performance Fords-check out our new throttle body service
95 SE with lots of custom 1 off mods. All design, fabrication and installation by owner.
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Two of them wer being run at the damper OME's test lab,both with solids Vs damper..controlled tests with a recirc oil system...no chance of pan running dry!
V6 MTX
'Don't p**s up my back then tell me it's raining!!!"
'Its only nuts & bolts!'
'If I build it,fix it,upgrade it or modify it...MAYBE they will come....!
Haines Motor Sports Inc,
Dealer for 'Quaife America' & 'Autotech Sport Tuning'
SOLE USA Dealer for the American Axle 'AUSSIE BAR'...
Get a Turbo for you Zetec from HMS Inc...by 'The Demon' ...www.DemonDynamics.co.uk
..don't talk about it DO IT !!!
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Originally posted by Terry Haines: Cant agree,some time ago I put up some pics of main & rod end bearings,no oil failure on these engines as they were static in a dyno cell....no 'long turns' either....just because you can't see or feel anything this does not mean the matearial,the crank, is not suffering from fatigue.Without stripping and doing regular met lab tests for microstructure you will see,feel or hear nothing.... Terry - curious about crankshafts. Aren't all BMW 6's I6, and don't they all come with dual mode dampers? Just curious, since everyone quotes this Dinan (and also seen the Supra articles saying the same thing, also I6 engine IIRC) as saying UDP's will cause a quick death. Is an I6 crank (in general) longer and inherently more susceptible to torsional vibe harmonics than say our 60 deg V6? I know that physics is physics and we UDP users are "abusing our cranks" so to speak, but could the difference in 60degree V6 to I6 (which I think also have crank throws at 60 don't they?) may be responsible for the difference in timeliness of deaths from Contours (proven > 40k with no obvious problems) to BMW's (dying at one track event). Any insight?
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Terry: Thanks for the info. Don't know the details of the test, (duration, RPM's, etc.) but sounds convincing enough. Possible that real world testing is of insufficient duration....
Further to ScottK's ?, can you comment on the crank itself? Did Ford change the process/material anywhere along the line? IIRC, our cranks are tuftrided/nitrided. Someone said that the early motors are more durable-any truth to that?
Technical Director/Co-Owner Performance Fords-check out our new throttle body service
95 SE with lots of custom 1 off mods. All design, fabrication and installation by owner.
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Micah if you still want his DMD you bid $110 you MUST contact me ASAP or send the PayPal, inccluding $11 for postage. If I don't hear from you by EOB today I wil have to forfeit your bid and put the damper back up for sale.
Regards, Anastazi Father of the Aussie Bar anastazi.sarigiannis@aam.com"Computer games don't affect kids. I mean if Pacman affected us as kids, we'd all run around in a darkened room, munching pills and listening to repetitive music." ----------------------------------- 2000 Silver Frost SVT #1126 of 2150 8" AFE/"Big-Mouth" Intake, Modified BAT Pipe, IAT Mod - A'PEXi S-AFC, Superchip, No Secondaries, Cobra/CSVT Hybrid MAF, Magnaflow True Duals, MYSTERY Mod, Autolite AWSF22FS's and FMS Wires, ES MM Inserts, Cross Drilled/Slotted Rotors w/ Greenstuffs, APR DTM Spoiler, Escort Cossie Vents, NACA Duct, Mirko Splitter, Koni's & H&R Springs, 24mm "Aussie" Sway Bar, 18" Enkei RS-5, 225/40R18 KDW-2's. Pioneer DEH-P7000R, TS-6975's, TS-6855's, MTX BE104, MTX Blue Thunder PRO502 http://www.geocities.com/qikslvrsvt
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Originally posted by 1Sick_Puppy:
It is for the 2.5L only...... Thanks!
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A straight six has better balance than a V6,but that is only static & dynamic.We are talking torsional vibration here,ALL engines have it,its just to what degree can the 'twist' imparted by each cylinder firing damage the crank...
V6 MTX
'Don't p**s up my back then tell me it's raining!!!"
'Its only nuts & bolts!'
'If I build it,fix it,upgrade it or modify it...MAYBE they will come....!
Haines Motor Sports Inc,
Dealer for 'Quaife America' & 'Autotech Sport Tuning'
SOLE USA Dealer for the American Axle 'AUSSIE BAR'...
Get a Turbo for you Zetec from HMS Inc...by 'The Demon' ...www.DemonDynamics.co.uk
..don't talk about it DO IT !!!
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Originally posted by Bradness:
Someone posted a while back that even at 5K RPM, there was only 1/2 qt. left in the pan. Bradness, This was a research test done by Rousch Labs.
Pete... 98.5 SE Sport Duratec ATX (P66L) Black Clearcoat on Greystone DOB 11/21/1997 DOP 12/25/1997 PIAA 510 Super White Driving Lights SVT CAT-BACK EXHAUST (No Resonator) DiabloSport Chip (LPQ4) - Engineered To Raise Hell Too many other mods to list... Sounds sweet, runs quick... Crazy Horse Dyno @ 121.4 WHP/129.6 TQ
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