Ford says don't modify your 2011-2012 Mustang 5.0 or your warranty is void

[fdkirkland]

[05mustangman]

Very interesting. Especially the part that says the engine is just about maxed out structurally from the factory.

[Jacostang]

Yup, those custom tunes are reaking havoc on the #8 cylinders.. I have the FRP Tune only in my 11...

[BurnTire]

#8 only doesn't pass the smell test for me. 1 to 7 are fine and only #8 fails.

[Rick Shopmier]

Picked up a new F-150 4x4 yesterday with the 5.0. It feels quicker and sounds much better than my 09 5.4, and was thinking of doing a tune on it, guess I will hold off. Will this heat ever end??????? Come on 9/9!!!!!!

[JoeT]

Thanks for posting this I missed this. Now you've helped me make up my mind 100% I do not want a 5.0 anymore. One wrong mod and your motor blows up. No thanks!

[svtrichie]

Dave, how do you like fro ford racing tune? These issues makes me want to get a shelby over the 5.0 even more.

[JoeT]

[Rick Shopmier]

I think all mfgr are trying to get around wty repairs if there is any reason. Posted some time ago there was an article about some guy (not around here) that had come to the dealer for wty repair on a new Mustang (05 on) with a damaged engine the dealer refuesed the repair under wty because the service manager witnessed the failure at a drag strip. There is fine print somewhere that say, racing a no no. As for the 5.0, this is still a new item and is in the figuring out phase, and if you look at the BOSS, for a 30 or so hp gain they literally changed everything except the block, but you have to think that the engineers are not going to design an engine in the begining of its cycle to be maxed for output, I think they are also working on higher output from the 5.0 design. I sure would not be throwing forced induction on one of these now! Time will tell.

[Wharf Rat]

That really ain't anything new.

Do a cai/tune, headers, ect on any car from any manufacturer and blow your engine and it won't be covered under warrantee. It's a calculated risk you take when you modify a car under warrantee.

The lifespan on the warrantees on my Mustangs have typically been about 2 weeks or 500 miles.

[trucker]

that piston looks to have been run very lean or run on NOX
they sure as heck don't melt from running rich unless they are shit already

[JoeT]

Hey its just the photos that are in the actual Ford TSB.

[Jacostang]

Dave, how do you like fro ford racing tune? These issues makes me want to get a shelby over the 5.0 even more.

I love it, it eliminates the skip shift and makes it even that more responsive, it wont tax out the engine.. The problem with the afternmarket tunes is that they are pushing them beyond redline which mine wont do it shuts down and my dash turned RED when I Pushed it, scarred me at first but it was protecting itself from me!!! The RED dash lights was cool though!:drool5:

[Jacostang]

Thanks for posting this I missed this. Now you've helped me make up my mind 100% I do not want a 5.0 anymore. One wrong mod and your motor blows up. No thanks!
Sky is not falling, the same thing happened when the pushed the 4.6 over the edge too. A Few GT500's motors blew when these tuners pushed them too far...:icon_cool:

[JoeT]

I think what I found informative is that the 5.0 motor is pretty much maxed out in the horsepower department, without making some big changes structurally.

[05mustangman]

Well that kind of kills the ability to supercharge the engine without having to do a crap load of engine mods. Like dave said people have probably blown up their engines by not doing something properly and then complained to Ford about it. So this might just be a precaution from Ford. I hope that is the case after all the hype around the 5.0 engine.

[JoeT]

Ya who knows, I dont know anything. I cant figure out even exhaust for mine. :)

[05mustangman]

Joe are you still running the factory exhaust?

[Jacostang]

Its like any new engine, here are the specs and then aftermarket takes over and see's what they can and cant do with these engines. And who know exactly what one person is doing or how they are driving their cars. I dont know of any car manufacturer that would guarantee an engine after it was modded by a non Ford Authorized Part. Would You? Mass produced parts fail all the time, even $100K motors when they are pushed too hard, one little glitch and K pow!

[JoeT]

Joe are you still running the factory exhaust?

Ya still running stock. Its not terrible just would like to hear it a little more and don't want drone. I'm so picky its hard to make a decision.

[BL00DSH0T]

From what I have been reading it is safer to add FI to the new 5.0 then it is to have just a tune. It was said that most of the tuners just applied the tuning of the 4.6 to the 5.0 as in more timing = more power and this was the cause of most failures.
I would say it is more in the tune then anything as there are some with no issue that are beating on the car.

I don't know where it came from that high compression motors are usually maxed out as that is not true.

I agree though that the warranty for me ended when I drove off the lot, same with my Jeep. Let something break and I will make it better.

[JoeT]

I don't know where it came from that high compression motors are usually maxed out as that is not true.


The quote came from Mustang news.
http://www.themustangnews.com/content/2011/07/ford-tsb-warns-of-modifications-to-2011-2012-5-0-mustangs/

[BL00DSH0T]

The quote came from Mustang news.
http://www.themustangnews.com/content/2011/07/ford-tsb-warns-of-modifications-to-2011-2012-5-0-mustangs/

Gotcha...I missed the "this" in there.

I still think it is BS as there is always more power hidden in a factory engine. Just think there have been a bunch of failures due to bad tuning and Ford has said enough is enough.

There is a video of the testing the Ford Racing supercharger goes through, so they think it is pretty safe to add a SC.

[Wharf Rat]

I think it was bad early tuning, too. These motors are no where close to being "maxed out" from the factory.

[JoeT]

Knock yourself out guys. :awsome:

[WildBill]

I think it was bad early tuning, too. These motors are no where close to being "maxed out" from the factory.

Bad early tuning is correct.
There's not a lot left N/A stock without mods.
The Whipple Supercharger is a safe mod for this engine.