5.9L magnum vs. 5.7 Hemi
#11
12-31-2017, 08:56 AM
#13
12-31-2017, 03:18 PM
The Viper reached it's end so if they do make a V10 hemi it won't be in a Viper.
https://www.torquenews.com/106/dodge...and-whats-next
https://www.torquenews.com/106/dodge...and-whats-next
#15
01-01-2018, 02:03 AM
Champion
This is a 2nd gen forum, so you're going to get opinions of people who own a 2nd gen. However, the 5.7L hemi motor is far better. It makes quite a bit more power and torque, while getting better gas mileage. Reliability wise, they aren't perfect, but the 360's are also far from perfect.
The 360 was really behind the times by the late 90's and should have been replaced much earlier than it was imo. It was a good competitor for the Chevy 350, but once the LSx series motors came out the 360 just didn't compare. The Chevrolet 5.3L motor made more power and got significantly better gas mileage without having the issues the Dodge motors had. The 6.0L motors just flat out embarrassed Dodge's 5.9L.
The same thing applies for the Ford 5.4L Triton. They made more horsepower, more torque, and got significantly better gas mileage.
The 5.7L hemi was the answer to the competition. Dodge was just 5-7 years late with it.
The 360 was really behind the times by the late 90's and should have been replaced much earlier than it was imo. It was a good competitor for the Chevy 350, but once the LSx series motors came out the 360 just didn't compare. The Chevrolet 5.3L motor made more power and got significantly better gas mileage without having the issues the Dodge motors had. The 6.0L motors just flat out embarrassed Dodge's 5.9L.
The same thing applies for the Ford 5.4L Triton. They made more horsepower, more torque, and got significantly better gas mileage.
The 5.7L hemi was the answer to the competition. Dodge was just 5-7 years late with it.
#16
01-01-2018, 12:39 PM
As to the original topic when you really dig into motor theory and how the 360 make power and hemi it all has to do with air flow. The hemis is only rated at 30ft lbs more but 100hp. Why? It can flow way more air at higher rpms. It may be a surprise to most (it was to me) the hemi cam (at least the first gen 5.7) isn't much more aggressive than the 5.9 cam. In fact I have yet to find an aftermarket cam for a 5.9 thats smaller than the stock 5.7 cam. Its all in the heads and intake. Those 5.7 heads are amazing for flow. If you look at the dyno sheets for the first gen 5.7 and 5.9 up until you need the airflow around ~3000rpm they are really close. In theory a 5.9 with really good heads and intake should perform like the 5.7. The gm ls series uses this same principle. Massive flowing heads with good intakes and a small cam equals good power, torque, and drive-ability. On top of materials science being better so we can cool better and bump the compression up on lower octane fuel.
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#17
01-01-2018, 12:53 PM
Not trying to start a fight but even my Ford friends would laugh at that. Everyone I have know that tried to use a 5.4 like a 6.0 gm or 5.7 hemi or even a 5.9 v8 hated it. Horrible mileage, no power, on top of some issues I would deem inexcusable but to each there own.
As to the original topic when you really dig into motor theory and how the 360 make power and hemi it all has to do with air flow. The hemis is only rated at 30ft lbs more but 100hp. Why? It can flow way more air at higher rpms. It may be a surprise to most (it was to me) the hemi cam (at least the first gen 5.7) isn't much more aggressive than the 5.9 cam. In fact I have yet to find an aftermarket cam for a 5.9 thats smaller than the stock 5.7 cam. Its all in the heads and intake. Those 5.7 heads are amazing for flow. If you look at the dyno sheets for the first gen 5.7 and 5.9 up until you need the airflow around ~3000rpm they are really close. In theory a 5.9 with really good heads and intake should perform like the 5.7. The gm ls series uses this same principle. Massive flowing heads with good intakes and a small cam equals good power, torque, and drive-ability. On top of materials science being better so we can cool better and bump the compression up on lower octane fuel.
.
As to the original topic when you really dig into motor theory and how the 360 make power and hemi it all has to do with air flow. The hemis is only rated at 30ft lbs more but 100hp. Why? It can flow way more air at higher rpms. It may be a surprise to most (it was to me) the hemi cam (at least the first gen 5.7) isn't much more aggressive than the 5.9 cam. In fact I have yet to find an aftermarket cam for a 5.9 thats smaller than the stock 5.7 cam. Its all in the heads and intake. Those 5.7 heads are amazing for flow. If you look at the dyno sheets for the first gen 5.7 and 5.9 up until you need the airflow around ~3000rpm they are really close. In theory a 5.9 with really good heads and intake should perform like the 5.7. The gm ls series uses this same principle. Massive flowing heads with good intakes and a small cam equals good power, torque, and drive-ability. On top of materials science being better so we can cool better and bump the compression up on lower octane fuel.
.
#18
01-01-2018, 06:17 PM
Champion
Air flow (primarily cylinder head design and the greater use of aluminum) is certainly a big factor in the performance of the newer motors these days. I really enjoy the 5.9 stuff and since its paid for, I can add things like Edelbrock heads, an M1 intake and a stroker kit to help make the old 5.9 perform a bit better.
#19
01-01-2018, 08:09 PM
[QUOTE=hometheaterman;3372729
The same thing applies for the Ford 5.4L Triton. They made more horsepower, more torque, and got significantly better gas mileage.
The 5.7L hemi was the answer to the competition. Dodge was just 5-7 years late with it.[/QUOTE]
As someone else said, none I have ever driven, or friends who own and daily drive them like this engine, they feel HELLA sluggish, no power basically anywhere, and mpg wasn't enough better to make it okay.
The same thing applies for the Ford 5.4L Triton. They made more horsepower, more torque, and got significantly better gas mileage.
The 5.7L hemi was the answer to the competition. Dodge was just 5-7 years late with it.[/QUOTE]
As someone else said, none I have ever driven, or friends who own and daily drive them like this engine, they feel HELLA sluggish, no power basically anywhere, and mpg wasn't enough better to make it okay.
#20
01-05-2018, 02:18 PM
You have the 5.7, 6.1, 6.2, 6.4. 5.7 and 6.4 were truck engines. The 6.1 and 6.2 came in the srt chargers and challengers. Now they are coming out with the viper V-10 and making it a Hemi. Which they said will be offered in the HD trucks and they say it will be very close to the diesel with torque.