Research on F-150 5.0 vs 5.7 Sodge Hemi
12-17-2018, 01:35 AM
#1
Research on F-150 5.0 vs 5.7 Sodge Hemi
Lots of chatter about guys wondering which engine is better and which truck is quicker.
Here are are the facts.
Hemi is an old school 2 valve push rod design. In this platform the only way to make big power (HP and Torque) you need to have huge cubic inches ie the old 427ci Hemi from the 70’s.
Fords 5.0 is a dohc design w vvt. Add dual direct injection and this new technology blows Hemi away. This engine reaches redline much quicker and is more fuel efficient.
So in short the debate is over. DOHC w VVT is a superior design than the old push rod style power plant.
Here are are the facts.
Hemi is an old school 2 valve push rod design. In this platform the only way to make big power (HP and Torque) you need to have huge cubic inches ie the old 427ci Hemi from the 70’s.
Fords 5.0 is a dohc design w vvt. Add dual direct injection and this new technology blows Hemi away. This engine reaches redline much quicker and is more fuel efficient.
So in short the debate is over. DOHC w VVT is a superior design than the old push rod style power plant.
12-17-2018, 01:46 AM
#2
Senior Member
You mean the 426 Hemi from the '60s?
Time to redline is more a function of a low mass rotating assembly (lower mass=lower inertia) than anything else, has zero to do with pushrod vs. OHC head type, ref Penske/Mercedes beast that won Indy.
As to your opening, haven't seen much debate on either point, people on a Ford website are going to be inclined to think the Ford is better, whether it's using pushrods or sliding sleeve valves.
Time to redline is more a function of a low mass rotating assembly (lower mass=lower inertia) than anything else, has zero to do with pushrod vs. OHC head type, ref Penske/Mercedes beast that won Indy.
As to your opening, haven't seen much debate on either point, people on a Ford website are going to be inclined to think the Ford is better, whether it's using pushrods or sliding sleeve valves.
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Blank102 (12-18-2018)
12-17-2018, 07:11 AM
#3
Saw a new video comparing the 19 models raptor 3.5, dodge hemi, chevy, they drove 345 miles and filled them up ford 19mpg, Chevy got 20, hemi got16 the guy was very disappointed since it had there new system on it and was supposed to beat the others what I thought was great was ford was turning 35" tires and 410 gear ,Chevy had a 323 gear and 31s and dodge was 350 with 31s .dodge got 20%
less mpg than on window sticker the others were right
less mpg than on window sticker the others were right
12-17-2018, 09:37 AM
#4
Senior Member
Saw a new video comparing the 19 models raptor 3.5, dodge hemi, chevy, they drove 345 miles and filled them up ford 19mpg, Chevy got 20, hemi got16 the guy was very disappointed since it had there new system on it and was supposed to beat the others what I thought was great was ford was turning 35" tires and 410 gear ,Chevy had a 323 gear and 31s and dodge was 350 with 31s .dodge got 20%
less mpg than on window sticker the others were right
less mpg than on window sticker the others were right
12-17-2018, 10:10 AM
#5
Lots of chatter about guys wondering which engine is better and which truck is quicker.
Here are are the facts.
Hemi is an old school 2 valve push rod design. In this platform the only way to make big power (HP and Torque) you need to have huge cubic inches ie the old 427ci Hemi from the 70’s.
Fords 5.0 is a dohc design w vvt. Add dual direct injection and this new technology blows Hemi away. This engine reaches redline much quicker and is more fuel efficient.
So in short the debate is over. DOHC w VVT is a superior design than the old push rod style power plant.
Here are are the facts.
Hemi is an old school 2 valve push rod design. In this platform the only way to make big power (HP and Torque) you need to have huge cubic inches ie the old 427ci Hemi from the 70’s.
Fords 5.0 is a dohc design w vvt. Add dual direct injection and this new technology blows Hemi away. This engine reaches redline much quicker and is more fuel efficient.
So in short the debate is over. DOHC w VVT is a superior design than the old push rod style power plant.
Also, I heard lots of chatter about the XPG vs XML2.
XML2 has much higher efficacy and can be found in such new designs to achieve the throw that was once reserved for only XPG-based designs.
XPG relies on old technology, where the XML2 is newer and reaches new levels of photon emitting capability.
So, that's another debate we can all call done.
12-17-2018, 10:57 AM
#6
You mean the 426 Hemi from the '60s?
Time to redline is more a function of a low mass rotating assembly (lower mass=lower inertia) than anything else, has zero to do with pushrod vs. OHC head type, ref Penske/Mercedes beast that won Indy.
As to your opening, haven't seen much debate on either point, people on a Ford website are going to be inclined to think the Ford is better, whether it's using pushrods or sliding sleeve valves.
Time to redline is more a function of a low mass rotating assembly (lower mass=lower inertia) than anything else, has zero to do with pushrod vs. OHC head type, ref Penske/Mercedes beast that won Indy.
As to your opening, haven't seen much debate on either point, people on a Ford website are going to be inclined to think the Ford is better, whether it's using pushrods or sliding sleeve valves.
12-17-2018, 12:18 PM
#7
Senior Member
I was referring to Mopar's 427 Hemi of the 70's not Ford's 426 Hemi of the 60's. With regard to redline, it is well written dohc, vvt, plus ddi allows for faster time to redline and higher redline thresholds. It is this that makes the Ford 5.0 superior in every single way to the old push rod (piston head on top of push rod) 5.7 Mopar Hemi. Thanks.
there is no engine that has a head on top of a pushrod, it's a rocker arm that the pushrod pushes on to actuate and open valves. Before attempting to sound technically savvy, learn the terminology you're using. In addition, it's rotating mass inertia combined with friction which slow redline, not the valve train differences. Ref the engine used in the Penske PC-23, it was a pushrod indy motor with low rotating mass and low intertia which turned well over 10K rpm and accelerated to redline in a heartbeat.
Last edited by gone postal; 12-17-2018 at 01:51 PM.
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12-17-2018, 01:43 PM
#8
Senior Member
I was referring to Mopar's 427 Hemi of the 70's not Ford's 426 Hemi of the 60's. With regard to redline, it is well written dohc, vvt, plus ddi allows for faster time to redline and higher redline thresholds. It is this that makes the Ford 5.0 superior in every single way to the old push rod (piston head on top of push rod) 5.7 Mopar Hemi. Thanks.
My wife likes a mushroom head on the end of the push rod......
Sometimes she like a hi reving push rod, sometimes she likes a low rev high torque push rod
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gone postal (12-17-2018)
12-17-2018, 03:13 PM
#9
music man
A lot of things you can pass in a Dodge, A gas station is not one of them.
