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 > Engine torque

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myredracer

Langley B.C.

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Posted: 06/07/19 12:44pm Link  |  Quote  |  Print  |  Notify Moderator

After the engine in our '09 V10 6.8L F250 'sploded 3 days ago, we ended up with a new-to-us replacement '12 GMC 2500HD that we were able to find on very short notice.

The V10 6.8L was rated 362HP with 457 ft-lbs torque. The 6.0 V8 in the GMC is almost identical HP at 360 but the torque is 380 ft-lbs. Both trucks have a 4.10 rear end.

Am wondering if the torque difference is going to be noticeable and if performance will be down in the mountains? We've towed our 7K lb TT around 7 western states and last week up to Jasper Alberta. Been on many steep and/or long inclines and the F250 never left me wanting more power/torque. Am also wondering if I'll end up pushing the GMC engine harder and causing more wear & tear?

The V10 in the F250 started making a very faint ticking/knocking sound at first. Then within less than a couple of miles the knocking got louder and louder to the point it barely moved and then died. Just got around around a corner off the highway and across railroad tracks in time. No power steering or brakes either of course. The mechanic at the shop it got towed to pronounced the engine terminal due to serious bottom end damage like broken rod cap or major broken something. They and us looked everywhere for a new or used V10 engine but they aren't very common and only found 2 a very long ways away and shipping, labor + engine cost would have been as much as the truck was worth if not more. We basically gave the F250 to the guy who sold us the GMC for nothing on trade-in value. [emoticon]

No idea what led to the demise of the V10. Changed the oil & filter yearly, had about 140K miles on it and it always ran great. The oil pressure was good right up to the end (unless that gauge was defective). We used it mainly for towing and it mostly sat in the driveway through the winter. Well under the GCWR too. There are some steep and long inclines in the Rockies and the engine was working pretty hard at times.

Maybe I just need to slow down and run with the semis over on the shoulder up long & steep grades, lol! At least we have a new truck and can keep on campin'. [emoticon]


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Turtle n Peeps

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Posted: 06/07/19 01:32pm Link  |  Quote  |  Print  |  Notify Moderator

That will depend on the torque curve of both engines. Peak torque does not really tell the whole story.

IMHO you are going to have to wind the 6.0 SB more the get the power out of it. The V10, not so much.

That being said, let it wind. SBC love to wind......Even BBC do. I take my 572 to 7K.

Wind it up and let it eat and it will get the job done for you. If you are timid you will feel it is down on power.

As far as the V10 goes. You got a dud. The V10 is a great engine. You can pound on those things 24/7 and they won't blow up. Like I said, you got a dud.


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the bear II

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Posted: 06/07/19 01:33pm Link  |  Quote  |  Print  |  Notify Moderator

You will notice a slight difference. Here's my real world example: a Friend had an F250 and I had a Chevrolet 3500 we each pulled 5th wheels that were about the same weight. He would pull away from me on uphill grades and wait at the top (usually 5 to 10 minutes depending on length and steepness).

myredracer

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Posted: 06/07/19 02:08pm Link  |  Quote  |  Print  |  Notify Moderator

Turtle n Peeps wrote:



As far as the V10 goes. You got a dud. The V10 is a great engine. You can pound on those things 24/7 and they won't blow up. Like I said, you got a dud.
The history on this engine was that the F250 was leased by one of the major oil companies in Alberta - Sunoco IIRC. It was run out of Calgary up to the oil fields in the north. The odometer didn't show a lot of miles but I *think* it had a lot of hours on it because they keep them idling in the winter all the time instead of using block heaters. Records showed it was serviced regularly but maybe the oilfield workers were driving the sn*t out of the truck as well. That's all we know on the history.

We did get a good price when we bought it so can't complain to a point.

ksss

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Posted: 06/07/19 02:12pm Link  |  Quote  |  Print  |  Notify Moderator

You really cant over work the 6.0 within reason. I have pulled combined 30K up the passes around me and while the mpg sucked, the 6.0 just got it done. Really a good motor. At the weights your pulling, wearing out a 6.0 would not even be a thought.


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gmckenzie

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Posted: 06/07/19 02:20pm Link  |  Quote  |  Print  |  Notify Moderator

myredracer wrote:

Turtle n Peeps wrote:



As far as the V10 goes. You got a dud. The V10 is a great engine. You can pound on those things 24/7 and they won't blow up. Like I said, you got a dud.
The history on this engine was that the F250 was leased by one of the major oil companies in Alberta - Sunoco IIRC. It was run out of Calgary up to the oil fields in the north. The odometer didn't show a lot of miles but I *think* it had a lot of hours on it because they keep them idling in the winter all the time instead of using block heaters. Records showed it was serviced regularly but maybe the oilfield workers were driving the sn*t out of the truck as well. That's all we know on the history.

We did get a good price when we bought it so can't complain to a point.


I avoid Oil patch trucks like the plague. Even had used truck salesmen warn me off buying them. Yeah, not a lot of miles but not a lot of care or concern from the drivers either.


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fla-gypsy

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Posted: 06/07/19 05:53pm Link  |  Quote  |  Print  |  Notify Moderator

You will notice the difference. That V10 delivered max torque at just 3200 rpm’s.


This member is not responsible for opinions that are inaccurate due to faulty information provided by the original poster. Use them at your own discretion.

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myredracer

Langley B.C.

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Posted: 06/07/19 07:38pm Link  |  Quote  |  Print  |  Notify Moderator

fla-gypsy wrote:

You will notice the difference. That V10 delivered max torque at just 3200 rpm’s.
Very good point. It sure pulled away fast from a stop even with the trailer behind it.

The 2011 and newer F250s engines are 380 HP & 405 ft-lbs which I thought about as an alternative. Did some searching and they aren't cheap unless they were white ex-work trucks. Not a lot out there either except for high $$ new/newer ones at up to around $50-60K USD.

A lot of trucks are going south to the US these days due to our low dollar and that doesn't help.

* This post was edited 06/07/19 07:50pm by myredracer *

theoldwizard1

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Posted: 06/07/19 08:20pm Link  |  Quote  |  Print  |  Notify Moderator

myredracer wrote:

The V10 6.8L was rated 362HP with 457 ft-lbs torque. The 6.0 V8 in the GMC is almost identical HP at 360 but the torque is 380 ft-lbs. Both trucks have a 4.10 rear end.

Am wondering if the torque difference is going to be noticeable and if performance will be down in the mountains?


100 ft-lbs less torque, HECK YES you are going to know ! Better start shopping for something with more power.

Torque curves do matter, but nothing is going to make up for that missing 100 ft-lbs. The Ford V10s get more torque at higher RPM so you do have to wind them up a bit.

dodge guy

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Posted: 06/07/19 08:27pm Link  |  Quote  |  Print  |  Notify Moderator

Yes you are going to notice it! Personally I would’ve replaced the V-10 and carried on!

When I had my 02 V-10 Excursion I would routinely spin it up to 4500 rpm climbing mountains. Never once did it complain.


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