Gas vs PSD
Elder User
Joined: Jan 2009
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From: Melissa TX
Thread Starter
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Modular motor junkie
Joined: May 2009
Posts: 6,190
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From: Texas
Here's a stock 2008 6.4L truck:
http://www.knfilters.com/dynocharts/63-2576_dyno.pdf
Showing around 275 HP at the rear wheels
Here's a 3V V10:
http://www.knfilters.com/dynocharts/57-2567_dyno.pdf
Showing around 250 HP or so.
http://www.knfilters.com/dynocharts/63-2576_dyno.pdf
Showing around 275 HP at the rear wheels
Here's a 3V V10:
http://www.knfilters.com/dynocharts/57-2567_dyno.pdf
Showing around 250 HP or so.
Elder User
Joined: Jan 2009
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From: Melissa TX
For some reason the diesel doesn't lose that much power to the rear wheels like the gas engines do. I would love to know why also.
Elder User
Joined: Apr 2006
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From: West Granby, CT.
Interesting YOU don't believe what someone says , and needs proof. 
.
Remember I questioned your mpg and you guys came down hard on me for questioning, stating I should not doubt what someone says
.Remember I questioned your mpg and you guys came down hard on me for questioning, stating I should not doubt what someone says
Postmaster
Joined: Apr 2008
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From: Rogersville, TN
Here's a stock 1999 7.3L PSD dyno sheet:
http://www.knfilters.com/dynocharts/57-2530_dyno.pdf
Makes a whopping 194 HP at the rear wheels!
And for comparison, here's a stock 2001 V10 sheet:
http://www.knfilters.com/dynocharts/57-2524_dyno.pdf
234 at the rear wheel!
I will say, I am very curious as to how those engines that are being dynoed by Mike are losing 130 hp from the flywheel to the rear wheels. There is a dyno shop about a mile from my house that I visit quite often and the numbers I see are usually 8-10% for a manual and 15-18% for an automatic. That would put a 2v v10 at around 280 hp with a manual and around 255 hp with an automatic. Not too far from the one you quote, but well above what that 6.2 Mike dynoed was showing......
Senior User
Joined: Feb 2010
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From: Whitewater, WI
My truck has a 6637 intake & 4" exhaust. I would say if I dynoed it I would make more (not by much) than 223hp rear wheel. I am going off of my experience from seeing lightly modded diesels on a dyno.
Crazy001-When you swappin' in a 3v V10?
Crazy001-When you swappin' in a 3v V10?
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From: Isanti, MN
When I find a donor willing to buy my PSD for the $6K price difference I paid. 
Seriously, I completely understand why the PSD is preferred for heavy towing. I didn't until I bought this one, but after towing heavy a couple times it all makes sense. So this is why I never argued that the V10 was a "better" engine for towing.
My position for this entire thread has been that the V10 is a very capable alternative for those who choose not to pay the price premium for the PSD.
I love how easy my truck can get heavy things moving, and I love how I can cruise at 1800 RPMs at nearly 20,000 lbs gross weight on the freeway and hardly ever have to downshift. But even though downshifts and high revs may not be desirable, the V10 is still entirely capable of hauling HUGE amounts of weight up steep hills. It may drink more fuel and it may shift around lots more, but it will get the job done.
Seriously, I completely understand why the PSD is preferred for heavy towing. I didn't until I bought this one, but after towing heavy a couple times it all makes sense. So this is why I never argued that the V10 was a "better" engine for towing.
My position for this entire thread has been that the V10 is a very capable alternative for those who choose not to pay the price premium for the PSD.
I love how easy my truck can get heavy things moving, and I love how I can cruise at 1800 RPMs at nearly 20,000 lbs gross weight on the freeway and hardly ever have to downshift. But even though downshifts and high revs may not be desirable, the V10 is still entirely capable of hauling HUGE amounts of weight up steep hills. It may drink more fuel and it may shift around lots more, but it will get the job done.
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Joined: Jan 2009
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From: Melissa TX
I could careless what people believe and don't believe. I will post that I get 18 mpg just to make you happy. But this guy has post in this thread alone over 700 times and thinks a stock 2v v-10 can easily make 250 rwhp. Where I showed a dyno graph of a truck that makes 75 more hp then a stock 2v v-10 and it dyno 258 rwhp. It's really hard to believe someone when facts like that are out there.
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From: Sunny, Snowy, CO
@ ChargersFan: Not sure where your getting bluebook prices from, but I just configured two identical 2008 trucks with 75,000 miles on kbb.org using their suggested retail value option. The truck was a Crew Cab F-350 Lariat 6 ft bed. The 6.4 booked for 34k, the V10 28k. Only $6000 difference. The second truck was CC F-350 Harley Davidson, 8ft bed. The V10 booked at 35k, the 6.4 at 37k. Just $2000 difference. For fun, I just did a basic work truck, 08 F-350 regular cab XL, the 6.4 books at 27k, the V10 at 21k. $6000 difference again.
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From: Sunny, Snowy, CO
Notice how they left the torque off of the V10 dyno sheet? Maybe it didn't register on the graph...
Postmaster
Joined: Apr 2008
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From: Rogersville, TN
But this guy has post in this thread alone over 700 times and thinks a stock 2v v-10 can easily make 250 rwhp. Where I showed a dyno graph of a truck that makes 75 more hp then a stock 2v v-10 and it dyno 258 rwhp. It's really hard to believe someone when facts like that are out there.
So say someone has an automatic 2v v10 that makes 310 hp at the flywheel and they test it on a dynojet and lose 18% to the wheels. That is going to have it making 255 rear wheel hp.
Now say someone has a 6.2 with 385 hp and they test it on the dyno like Mike has. If they show 15% less hp than the dynojet, then it is going to lose 18%+15%=33% to the wheels. 385-33%=257 hp to the wheels.
Funny how the "facts" show that both of you are correct......
Elder User
Joined: Jan 2009
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From: Melissa TX
Facts can be, well, not true sometimes. The guy that tested the 6.2(Mike, I think) clearly stated in the thread where he tested the 6.2 that his dyno always gets results that are about 15% lower than a dynojet. I have never seen anyone other than Mike use the kind of dyno that he uses, in any kind of magazine or anywhere else. On a dynojet you lose about 10% to the wheels with a manual and 18% with an automatic.
So say someone has an automatic 2v v10 that makes 310 hp at the flywheel and they test it on a dynojet and lose 18% to the wheels. That is going to have it making 255 rear wheel hp.
Now say someone has a 6.2 with 385 hp and they test it on the dyno like Mike has. If they show 15% less hp than the dynojet, then it is going to lose 18%+15%=33% to the wheels. 385-33%=257 hp to the wheels.
Funny how the "facts" show that both of you are correct......
So say someone has an automatic 2v v10 that makes 310 hp at the flywheel and they test it on a dynojet and lose 18% to the wheels. That is going to have it making 255 rear wheel hp.
Now say someone has a 6.2 with 385 hp and they test it on the dyno like Mike has. If they show 15% less hp than the dynojet, then it is going to lose 18%+15%=33% to the wheels. 385-33%=257 hp to the wheels.
Funny how the "facts" show that both of you are correct......