The #8, and why it failed. An inside look.
Shelby GT350 Member
Joined: September 11, 2006
Posts: 2,349
Likes: 5
From: Cumming, GA
The reason for the #8 failure on stock cars was due to a weird problem in the stock tune. In certain cases, the tune will command an afr of 13.5-14.7 during WOT. Sean from AED has documented the issue and has seem it numerous time on cars running the stock tune. The problem only occurs on MT cars. For whatever reason, the failures don't seem to be as frequent with the newer cars.
Banned
Joined: August 2, 2013
Posts: 3,090
Likes: 254
From: Little north of Stuttgart, Germany
Mach 1 Member
Joined: April 1, 2012
Posts: 595
Likes: 3
From: Waddell, AZ
The reason your wrong is because Obama appointed Katherine Sebelius to oversee the PCM calibrations at the factory,...need I say more? Hahahahaha I'm just messin
Shelby GT350 Member
Joined: April 29, 2005
Posts: 2,133
Likes: 5
To me it just seems that removing the squirters was such an about face to how they touted them initially when rolling out the 5.0. All the mag rags had write ups about it. It was pretty innovative for a street car. Ford has always been good at getting power out of smaller displacement engines and this seemed a sound method for allowing higher compression in the 5.0, adding to higher HP.
The removal for 13 forward was much too coincidental with the #8 failures the 11/12's had, to be just an improvement vs solving a very real failure rate. The combination of squirter deletion, revised oil rings, piston coatings, hood vents - all at the same time - points to a (heat related/upper cylinder oiling) engineering change to resolve the piston failures that were triggered by unsafe tune parameters.
Also, if the failure was only related to the tune allowing knock/detonation to stress pistons beyond their capability, why only #8 failures? (I think I only read of one #4). Why weren't other pistons failing? Detonation does not happen only in #8 cylinder and not others.
But I am just observing with some old school common sense and reasonable mechanical aptitude point of view. I don't have the technical/engineering expertise some of you have. So I am hoping for something concrete to resolve my restless mind.
Granted Ford has been very tight lipped for obvious reasons, and what info we have collected has only come by tidbits here and there by some that either work at Ford or have technical involvement with Ford products.
Mach 1 Member
Joined: August 3, 2011
Posts: 700
Likes: 4
From: East Haven, Connecticut
Probably because in the beginning they were the biggest culprits in causing the failures so they had to come up with a gimmick to save face. Pretty good marketing ploy as many fall for it.
Post *****
Joined: December 14, 2007
Posts: 19,953
Likes: 4
From: State of Jefferson Mountains USA
However, that doesn't explain why Ford stopped the original 11/12 design and made engineering changes for 13 forward.
That's more than Brenspeed did - and they had reported failures too but stiffed customers.
Mach 1 Member
Joined: August 3, 2011
Posts: 700
Likes: 4
From: East Haven, Connecticut
Post *****
Joined: December 14, 2007
Posts: 19,953
Likes: 4
From: State of Jefferson Mountains USA
Mach 1 Member
Joined: August 3, 2011
Posts: 700
Likes: 4
From: East Haven, Connecticut
Shelby GT350 Member
Joined: April 29, 2005
Posts: 2,133
Likes: 5
Last edited by Thomas S; Apr 28, 2014 at 06:41 PM.
Post *****
Joined: December 14, 2007
Posts: 19,953
Likes: 4
From: State of Jefferson Mountains USA
Because you obviously have a burr up your asz dip s*** and refuse to quit your *****in about YOUR bias. There are numerous tuners that screwed up - save a few.
Feel free to search this forum about Brenspeed's screwing of a member of TMS before you continue your rant across numerous threads about bama or others.
But do YOU mention that?
Nope.
So take your ***** private or elsewhere because YOU are only tellin one side of the story.
Feel free to search this forum about Brenspeed's screwing of a member of TMS before you continue your rant across numerous threads about bama or others.
But do YOU mention that?
Nope.
So take your ***** private or elsewhere because YOU are only tellin one side of the story.
Last edited by cdynaco; Apr 29, 2014 at 02:32 AM.
Thread Starter
Mach 1 Member
Joined: March 1, 2007
Posts: 669
Likes: 5
From: Kansas City
I asked in that thread to see the datalog. Need to get specifics before anyone can blame anyone.
(I also agree about Brenspeed... I would never recommend their tunes)
-Matt
(I also agree about Brenspeed... I would never recommend their tunes)
-Matt
Thread Starter
Mach 1 Member
Joined: March 1, 2007
Posts: 669
Likes: 5
From: Kansas City
Before anyone starts blaming Bama, I would prefer to see a datalog to look at all conditions. Its different when you know the functions to achieve commands.
-Matt