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Re: Fords new 7.3 liter engine is a pushrod engine? [Re: double vanos] #5184345 08/11/19 01:29 PM
Joined: Jun 2002
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wtd Offline
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I'm very interested in this new Ford engine even though I'm not that much of a Ford fan. I guess I like more simplicity in engine design and is probably why I still drive two older Chevy trucks.

While they may not make the most power, they get the job done.


2014 Mustang GT
1998 Chevy K3500
1998 Chevy K1500
(2) 1992 Cavaliers
1970 Monte Carlo
Re: Fords new 7.3 liter engine is a pushrod engine? [Re: Skippy722] #5206564 09/06/19 05:57 PM
Joined: Oct 2010
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A_Harman Offline
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Originally Posted by Skippy722
Originally Posted by OVERKILL
Originally Posted by Ws6
Originally Posted by A_Harman



I think the 6.2 suffers from excessive mass at the valve. Ford designed it with the hydraulic lash adjuster at the valve end of the rocker arm. This means that whatever accelerations it feels from the cam are multiplied by the rocker ratio. It probably has about as much mass at the valve as a pushrod engine.


I like how Mazda did it. They seem to have figured out turbo/DI, "fill for life" transmission fluid, etc. as well.
[Linked Image from i43.tinypic.com]
[Linked Image from i43.tinypic.com]

On their Skyactive engines, Mazda uses a class 3 lever (similar to BMW's 14,000rpm S1000RR design), and a low-friction roller cam follower. But the pièce de résistance is the hydraulic lash adjuster (HLA) at the fulcrum.



FYI, that's the exact same way Ford did it on the Modular.


Same as the Pentastar v6 as well. It’s a great system imo.


The end-pivot valvetrain with stationary lash adjuster at the fulcrum is the most popular type in the world. It has pretty much taken over from the direct-acting bucket lifter style. It has advantages of being able to package a roller cam follower for low friction, lower engine height because the cam follower is next to the valve stem instead of on top of it, and ability to achieve higher valve velocity than the direct-acting slider follower style.


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Re: Fords new 7.3 liter engine is a pushrod engine? [Re: wtd] #5208435 09/09/19 10:43 AM
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DGXR Offline
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Joined: Jan 2011
Posts: 908
Originally Posted by wtd
I'm very interested in this new Ford engine even though I'm not that much of a Ford fan. I guess I like more simplicity in engine design and is probably why I still drive two older Chevy trucks. While they may not make the most power, they get the job done.


cheap - fast - reliable
pick any two smile
Truck engines are not designed for maximum power... may be an obvious statement but needed to be said. They are designed to balance durability, fuel efficiency, torque (useful output for the application), and ease of ownership... all while being fairly cheap to manufacture.
I also prefer the older SBC engines over Ford's offerings, but they all have certain strengths.


1995 Corvette coupe LT1 6-speed
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1999 Yamaha YZ400FL
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Re: Fords new 7.3 liter engine is a pushrod engine? [Re: double vanos] #5208451 09/09/19 11:04 AM
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jakewells Offline
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i prefer my my 4.3 vortec over any sbc but i would take a inline 6.


2001 Mercury Cougar base 2.5l CD4E automatic.


Re: Fords new 7.3 liter engine is a pushrod engine? [Re: jakewells] #5209258 09/10/19 12:58 PM
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ls1mike Offline
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Originally Posted by jakewells
i prefer my my 4.3 vortec over any sbc but i would take a inline 6.


Except your 4.3 is technically a SBC 350 with the first two cylinders cut away. I mean that is literally what the 4.3 was designed from.

I have had traditional SBCs and 4.3. I will take the an LS based engine everyday. Cheap to maintain, better power, better MPG with less problems.


Mike
00 Trans Am WS6 5.7 LS1
17 Silverado 3500HD 6.0
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15 Malibu LTZ Turbo
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Re: Fords new 7.3 liter engine is a pushrod engine? [Re: ls1mike] #5209268 09/10/19 01:07 PM
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OVERKILL Offline
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Originally Posted by ls1mike
Originally Posted by jakewells
i prefer my my 4.3 vortec over any sbc but i would take a inline 6.


Except your 4.3 is technically a SBC 350 with the first two cylinders cut away. I mean that is literally what the 4.3 was designed from.

I have had traditional SBCs and 4.3. I will take the an LS based engine everyday. Cheap to maintain, better power, better MPG with less problems.


Yep, the LSx engines are a much better engine than anything based on the old SBC.


2019 RAM 1500 Sport - Mobil 1 EP 0w-20, FRAM Ultra
2020 Grand Cherokee SRT - Ravenol SSL 0w-40, FRAM Ultra
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