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08-01-2019, 08:41 PM
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#1
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Oct 2010
Location: Lake Havasu City, AZ
Posts: 1,717
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Specs out on new Ford 7.3 gas engine
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2019 Newmar Dutch Star 4328 K2
2017 Grand Cherokee Summit 5.7
2008 Beaver Contessa 40' Pacifica 425 Cat
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08-02-2019, 04:40 AM
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#2
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Senior Member
Join Date: Aug 2016
Posts: 763
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Ford is referring to its new gasoline V-8, a.k.a. "Godzilla," as "best in class"; it's rated for 430 horsepower at 5500 rpm and 475 lb-ft of torque at 4000 rpm.
2017 V-10 : HP 320 @ 4250, Torque 460 @ 3000.
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Pete , Stroudsburg , PA. 2017 Tiffin 32 SA 24K Chassis
Sumo Springs, Safe T Plus, F&R RM SB, R-TB, Front Koni FSD Quad Shocks, Rear Koni FSD Quad Shocks,2019 Jeep Cherokee Trailhawk Elite
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08-02-2019, 07:48 AM
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#3
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Senior Member
Join Date: Mar 2015
Posts: 2,984
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I hope it is quiet at those RPMs...
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'04 Newmar Mountain Aire 4016
400ISL/Freightliner
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08-02-2019, 08:08 AM
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#4
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Oct 2010
Location: Lake Havasu City, AZ
Posts: 1,717
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Actually, the important part of the article as it relates to motor homes is the mention of a detuned engine resulting in only 350 hp. Not much more than the v10.
“A slightly less powerful version of the new 7.3, rated at 350 horsepower at 3900 rpm and 468 lb-ft of torque at 3900 rpm, will be standard on the F-450 chassis cab, the F-550, the new F-600, F-650 and F-750 Medium Duty trucks, and F-53 and F-59 stripped-chassis models.”
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2019 Newmar Dutch Star 4328 K2
2017 Grand Cherokee Summit 5.7
2008 Beaver Contessa 40' Pacifica 425 Cat
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08-02-2019, 08:20 AM
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#5
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Senior Member
Fleetwood Owners Club Freightliner Owners Club
Join Date: Nov 2006
Location: Raleigh, NC
Posts: 355
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Here is a video from Autoline Daily on the new engine. It starts at the 2 minute mark...
https://www.youtube.com/watch?time_c...&v=H2jb_MBSerQ
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08-02-2019, 08:24 AM
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#6
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Senior Member
Join Date: Apr 2019
Location: Comancheria
Posts: 484
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Quote:
Originally Posted by tankcj
Actually, the important part of the article as it relates to motor homes is the mention of a detuned engine resulting in only 350 hp. Not much more than the v10.
“A slightly less powerful version of the new 7.3, rated at 350 horsepower at 3900 rpm and 468 lb-ft of torque at 3900 rpm, will be standard on the F-450 chassis cab, the F-550, the new F-600, F-650 and F-750 Medium Duty trucks, and F-53 and F-59 stripped-chassis models.”
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According to this chart from Ford the detuned engine is only for the E series and as an option at that.
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2016 Tiffin 32SA 24K chassis
2020 Ford Escape Hybrid toad
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08-02-2019, 09:26 AM
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#7
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Senior Member
Join Date: May 2016
Location: Delaware beaches
Posts: 1,164
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For a MH, my understanding is that it's all about torque. Why would that huge increase in HP for the Godzilla result in a torque increase of only 15 ft. lbs? RPM's/powerband? My questions probably reflect my rudimentary understanding of engine parameters.
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2005 Beaver Monterey 36' 400 hp Cat C9 Sold 9/20
2004 Newmar DS 4009 DP Sold 8/18
Delaware beaches ----- DW & Kip the Wonder Dog
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08-02-2019, 10:51 AM
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#8
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Senior Member
Join Date: Apr 2019
Location: Comancheria
Posts: 484
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Quote:
Originally Posted by Sandy Swede
For a MH, my understanding is that it's all about torque. Why would that huge increase in HP for the Godzilla result in a torque increase of only 15 ft. lbs? RPM's/powerband? My questions probably reflect my rudimentary understanding of engine parameters.
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Horsepower and gearing does the work. A class A gasser on a 20 to 26K chassis is going to have an excellent to outstanding power to weight ratio. A class A on a 16 or 18K chassis is going to be an RV hot rod. I think these things are going to leave many DPs in the dust.
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2016 Tiffin 32SA 24K chassis
2020 Ford Escape Hybrid toad
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08-02-2019, 11:31 AM
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#9
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Senior Member
Thor Owners Club Ford Super Duty Owner
Join Date: Jul 2011
Posts: 3,796
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What has my attention is the nearly flat torque line. Having a power train that has 400+ lbs of torque at 1500 RPM is going to be interesting to drive. I suspect we should have a set up that will hold speed with cruise control set over the moderate inclines that in the past with the V10 cause the down shift and 3500+ RPM. Heavy climbs should be much easier and with a bit more overall cylinder capacity we might also have a bit more engine braking for the descent.
The spec I waiting on is the final axle ratio for the chassis. Knowing the 6 speed gear ratios, wheel diameter and axle ratio you can compute engine RPM for any speed. I'm hoping for something around 1800 RPM for 65 MPH which might make for a modest gain in fuel economy and potentially a quieter ride.
As an added bonus the dog house should get a bit smaller.
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2006 Hurricane 31D built on a 2006 Ford F53
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08-02-2019, 11:50 AM
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#10
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Senior Member
Texas Boomers Club
Join Date: Aug 2013
Location: Lamar, Missouri
Posts: 291
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I smell a large motorhome price increase coming.
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Gary & Misty
2014 F250 Diesel, PullRite SuperGlide, AirLift 5000s
2017 Keystone Sprinter 298FWRLS
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08-02-2019, 12:39 PM
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#11
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Senior Member
Join Date: Jun 2019
Posts: 248
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Quote:
Originally Posted by Sandy Swede
For a MH, my understanding is that it's all about torque. Why would that huge increase in HP for the Godzilla result in a torque increase of only 15 ft. lbs? RPM's/powerband? My questions probably reflect my rudimentary understanding of engine parameters.
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They do it with RPM. HP goes up as the RPM goes up with no torque change. HP=torque x RPM ÷ 5252. So if you can increase RPM a ton with a small torque increase you can get a big bump in HP.
This is similar to the Cat C7 engines that are 300/330/350 HP but all have the same 864lb/ft torque (IIRC). I think it's just a small RPM increase between the engine models. That's only a 300RPM diff between the 300hp and 350hp models.
-E
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