Dodge RAM w/ 3.6 Pentastar = 305 HP .... Why ?
Thread Starter
JK Enthusiast
Joined: Jun 2010
Posts: 404
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From: Egypt
Dodge RAM w/ 3.6 Pentastar = 305 HP .... Why ?
I was wondering why is 3.6 Pentastar on the new RAM cranking out 305 HP while ours on JKs puts out 285 ?
What's the diff ? Is it only in the tuning (software) ... Or is there a mechanical difference (hardware) ?
What's the diff ? Is it only in the tuning (software) ... Or is there a mechanical difference (hardware) ?
JK Freak
Joined: Nov 2008
Posts: 972
Likes: 0
From: Allen, TX
And the Ram is getting the diesel from the Grand Cherokee but not the vehicle that needs it the most; the JK! Ugh!
JK Super Freak
Joined: Jun 2008
Posts: 1,071
Likes: 1
From: Attleboro, MA
Does the Pentastar by chance need premium fuel in the Ram?
I wouldn't be surprised if they gave it a '93 tune' in order to break the 300hp mark for better marketing in the truck realm.
Different intake/exhaust design is certainly a possibility too.
I wouldn't be surprised if they gave it a '93 tune' in order to break the 300hp mark for better marketing in the truck realm.
Different intake/exhaust design is certainly a possibility too.
JK Freak
Joined: Oct 2012
Posts: 832
Likes: 1
From: Sabina, OH
HP is not the spec I'm interested in for my JK... it's torque. The HP numbers are usually made in an RPM range you will never use (near red-line). Peak torque is usually in the derivable range. When designing/tuning an engine there is always a trade-off or HP to TQ. A longer duration cam profile will increase HP but decrease TQ. The same lift cam with a short duration will have low HP but better TQ. Back-pressure in the exhaust is also necessary for TQ.
In my Jeep I could give a rats-butt about HP... I want Torque down-low for crawling. In a truck you need both the torque to get a load moving, but HP to keep it going on the highway and over grades. Cars are often tuned for HP and rely on gearing to aid in the lower TQ numbers. As mentioned earlier air-flow has impacts on both numbers too. Since the truck has more room for the exhaust, one would think it could be designed to flow more efficiently.
Gasoline engines are not great torque makers when compared to diesel. This is why so many (self included) would love to see one in a JK.
In my Jeep I could give a rats-butt about HP... I want Torque down-low for crawling. In a truck you need both the torque to get a load moving, but HP to keep it going on the highway and over grades. Cars are often tuned for HP and rely on gearing to aid in the lower TQ numbers. As mentioned earlier air-flow has impacts on both numbers too. Since the truck has more room for the exhaust, one would think it could be designed to flow more efficiently.
Gasoline engines are not great torque makers when compared to diesel. This is why so many (self included) would love to see one in a JK.
JK Junkie
Joined: Mar 2012
Posts: 2,482
Likes: 1
From: Denver, CO
HP is not the spec I'm interested in for my JK... it's torque. The HP numbers are usually made in an RPM range you will never use (near red-line). Peak torque is usually in the derivable range. When designing/tuning an engine there is always a trade-off or HP to TQ. A longer duration cam profile will increase HP but decrease TQ. The same lift cam with a short duration will have low HP but better TQ. Back-pressure in the exhaust is also necessary for TQ.
In my Jeep I could give a rats-butt about HP... I want Torque down-low for crawling. In a truck you need both the torque to get a load moving, but HP to keep it going on the highway and over grades. Cars are often tuned for HP and rely on gearing to aid in the lower TQ numbers. As mentioned earlier air-flow has impacts on both numbers too. Since the truck has more room for the exhaust, one would think it could be designed to flow more efficiently.
Gasoline engines are not great torque makers when compared to diesel. This is why so many (self included) would love to see one in a JK.
In my Jeep I could give a rats-butt about HP... I want Torque down-low for crawling. In a truck you need both the torque to get a load moving, but HP to keep it going on the highway and over grades. Cars are often tuned for HP and rely on gearing to aid in the lower TQ numbers. As mentioned earlier air-flow has impacts on both numbers too. Since the truck has more room for the exhaust, one would think it could be designed to flow more efficiently.
Gasoline engines are not great torque makers when compared to diesel. This is why so many (self included) would love to see one in a JK.
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JK Freak
Joined: Oct 2012
Posts: 832
Likes: 1
From: Sabina, OH
It's marketing... when is the last time you saw it advertised? All the MFGs are in a HP race... with little mention of Torque. Even when it is listed it is often a smaller font which makes it seem less important; when in actuality it is the number that is felt when driving and gives the perception of "Power".
