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#4699397 - 03/19/18 07:51 AM Are v6 engines being over stressed
littleant Offline


Registered: 10/10/17
Posts: 408
Loc: Vermont
Your opinions. Looked online at a 2018 Navigator (not to purchase). It has a 3.5 twin turbo's 450 HP. I had an 2000 with the intec engine hemi head that I believe could easily make 450 HP with a little tweaking without turbocharging. Do you think the V6 is being over stressed and there my be problems in the future.
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#4699404 - 03/19/18 07:58 AM Re: Are v6 engines being over stressed [Re: littleant]
madRiver Offline


Registered: 07/11/15
Posts: 3609
Loc: New England
Originally Posted By: littleant
Your opinions. Looked online at a 2018 Navigator (not to purchase). It has a 3.5 twin turbo's 450 HP. I had an 2000 with the intec engine hemi head that I believe could easily make 450 HP with a little tweaking without turbocharging. Do you think the V6 is being over stressed and there my be problems in the future.


Nope. Vast majority of time in life of engine in majority of vehicles a small fraction of power is needed to actually move it. The stress is mainly related to the person behind the wheel.

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#4699405 - 03/19/18 08:00 AM Re: Are v6 engines being over stressed [Re: littleant]
honeeagle Offline


Registered: 12/16/12
Posts: 20
Loc: Canada
I don't think so......
some perspective maybe
at one time engines were over 20 litres ,overhead cams and all -just after the first war.
every generation they have got smaller ,more effiecant as long as governments stay away a bit.
Heat is the killer the only killer now because computers keep the revs in check and if all else fails (coolant loss) it will 'save' the engine.
The new Ford turbos are 'wife' proof ,siphon cooled bearing in the turbo ,oil cooled pistons etc
They are not your '80s turbo.
Your wife can race to the mall ,shut the engine down red hot and no damage will occur .
consider also this engine in a pick-up over loaded ,on vacation up mountains for years now ...... dont worry. The manufacturer has a lot at stake and are very careful ,that said read the manual and follow maintenance requirements and suggestions.
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#4699466 - 03/19/18 08:39 AM Re: Are v6 engines being over stressed [Re: littleant]
SubieRubyRoo Offline


Registered: 05/14/12
Posts: 1232
Loc: Winchester, Indiana
Ant, if Ford has no problems putting this exact same engine in the Raptor, there will be no concerns in the Navigator. Ford still offers a full powertrain warranty on the Raptor, and it's nearly guaranteed to see much more severe treatment than hauling the kids to soccer practice.

It's also essentially the same engine as in the Ford GT. Making 650HP.

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#4699533 - 03/19/18 09:30 AM Re: Are v6 engines being over stressed [Re: littleant]
Camprunner Offline


Registered: 02/19/08
Posts: 1037
Loc: MA.
I have a friend that works for Ford and he told me years ago they beat the living tar out of the eccoboost motors just to see there limits. They are an impressive motor design with plenty of potential the one you buy is not working all that hard and can sustain a significant more HP and still be reliable.

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#4699577 - 03/19/18 10:19 AM Re: Are v6 engines being over stressed [Re: littleant]
440Magnum Offline


Registered: 02/01/09
Posts: 8756
Loc: Texas
Originally Posted By: littleant
Your opinions. Looked online at a 2018 Navigator (not to purchase). It has a 3.5 twin turbo's 450 HP. I had an 2000 with the intec engine hemi head that I believe could easily make 450 HP with a little tweaking without turbocharging. Do you think the V6 is being over stressed and there my be problems in the future.


Doubtful. These engines are being designed from the oil pan to valvecovers for that kind of power, its not like just hanging a turbo on an existing engine and posting youtube videos of the explosion the way the import tuner crowd does. Going all the way back to the old Chrysler 2.2 and 80s turbo volvos, those engines were designed to be turbocharged and had crankshafts and journal sizes that were as beefy as a typical v8. Today, they've also addressed some issues that tended to fail back then, like cylinder head clamping force to contain the higher cylinder pressures over the life of the engine. The limiting factor now isn't so much the physical forces on the small parts- because the parts aren't really that small, its just the air gap over the pistons that's small. The limiting factor is how much pressure you can build without detonation using available fuels. Things like DI help, but introduce their own issues. That's one reason GM (and others) are lobbying for higher octane pump gasolines.
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#4699582 - 03/19/18 10:22 AM Re: Are v6 engines being over stressed [Re: littleant]
littleant Offline


Registered: 10/10/17
Posts: 408
Loc: Vermont
Glade to hear this. Was really thinking about the turbo's putting a lot of pressure on the engine. Except for 3/4 ton and up pickups do you think the V8 will die out or is it already dead. Looking at the new navigators on TV commercials was just curious what engine this land yacht had. Could not believe the price. 70,000-90,000 dollars. Never paid that much for a house.
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#4699592 - 03/19/18 10:28 AM Re: Are v6 engines being over stressed [Re: littleant]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2451
Loc: Balearic Islands , Spain
Not really.
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#4699608 - 03/19/18 10:55 AM Re: Are v6 engines being over stressed [Re: littleant]
mightymousetech Offline


Registered: 04/03/17
Posts: 1478
Loc: Ontario, Canada
Originally Posted By: littleant
Your opinions. Looked online at a 2018 Navigator (not to purchase). It has a 3.5 twin turbo's 450 HP. I had an 2000 with the intec engine hemi head that I believe could easily make 450 HP with a little tweaking without turbocharging. Do you think the V6 is being over stressed and there my be problems in the future.


Not at all. There are 2.0T engines making nearly the same.
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#4699635 - 03/19/18 11:30 AM Re: Are v6 engines being over stressed [Re: littleant]
rshaw125 Offline


Registered: 08/18/04
Posts: 3277
Loc: Raleigh ,NC CSA
Both Ford GT's finished the entire Sebring 12 hour last weekend. They run twin turbo 3.5 Ecoboosts. 647 hp on the road versions.
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#4699654 - 03/19/18 11:46 AM Re: Are v6 engines being over stressed [Re: littleant]
440Magnum Offline


Registered: 02/01/09
Posts: 8756
Loc: Texas
Originally Posted By: littleant
Glade to hear this. Was really thinking about the turbo's putting a lot of pressure on the engine. Except for 3/4 ton and up pickups do you think the V8 will die out or is it already dead. Looking at the new navigators on TV commercials was just curious what engine this land yacht had. Could not believe the price. 70,000-90,000 dollars. Never paid that much for a house.


Well, the truly "big" v8s died years ago, there's nothing over 6.4 liters is left, and nothing truly big-block/big-bore. Overall, the v8 isn't dead yet, but its applications will decrease. Certainly cars like the Challenger, Camaro, and Mustang will keep at least one v8 option for a while longer, as will bigger trucks (especially when gasoline remains cheaper than diesel, and when the up-front cost of a diesel engine is so high that it negates any longevity advantage for moderate to occasional trailer-towers). People have been foretelling the doom of the v8, and in particular the pushrod v8, for 40 years. Its not going anywhere, its still the most compact way to get a low-stress yet high output engine, not to mention the neck-snapping response and classic sound that are desirable in certain market segments. I've driven an Ecoboost Mustang, loved it, and it impressed the heck out of me performance-wise... but it didn't make me smile ear-to-ear the way a GT350, Camaro SS, or Challenger SRT-8 will.
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'66 Dodge Polara & '69 Dodge Coronet R/T both 440/727
'08 Ram 1500 4.7/545RFE
'12 Challenger SRT8 392/6-speed
'99 XJ 4x4 4.0/AX15, '14 WK2 4x4 3.6/8HP

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#4699656 - 03/19/18 11:49 AM Re: Are v6 engines being over stressed [Re: rshaw125]
thescreensavers Offline


Registered: 12/21/09
Posts: 431
Loc: Jupiter, FL
Originally Posted By: rshaw125
Both Ford GT's finished the entire Sebring 12 hour last weekend. They run twin turbo 3.5 Ecoboosts. 647 hp on the road versions.


You have a source for that last bit?
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#4699662 - 03/19/18 11:53 AM Re: Are v6 engines being over stressed [Re: thescreensavers]
rooflessVW Online   content


Registered: 12/24/11
Posts: 4326
Loc: North Carolina
Originally Posted By: thescreensavers
Originally Posted By: rshaw125
Both Ford GT's finished the entire Sebring 12 hour last weekend. They run twin turbo 3.5 Ecoboosts. 647 hp on the road versions.

You have a source for that last bit?

Wikipedia
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#4699678 - 03/19/18 12:09 PM Re: Are v6 engines being over stressed [Re: littleant]
dlundblad Offline


Registered: 09/30/13
Posts: 10193
Loc: Indiana
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#4699680 - 03/19/18 12:10 PM Re: Are v6 engines being over stressed [Re: littleant]
dlundblad Offline


Registered: 09/30/13
Posts: 10193
Loc: Indiana
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