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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 05-28-2012, 01:44 AM
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Ok everyone, I have spent the last two weeks reading up on mods done or ones wanting to be done, & I must say WOW........ There's a lot of different ideas goin on out there, & quite honestly, it's very difficult to determine what's best for my application. So here goes my idea. My truck is an everyday driver first of all. I have 3.92 gears I opted for because I knew I wanted to lift the truck 6" Superlift K120B ASAP. These trucks are beautiful stock, so not much I want to do cosmetically, with the exception of a Bullbar, Lights, & nerf bars. However, I want to optimize my drivability as much as I can & preserve as much MPG as possible so............I've ordered the Vararam, Fastman TB, ARH w/Cats, & MagnaFlow 3" X 2.5" dual out. I'm still not sure I grasp the importance of the Catchcan or why when you change your Thermostat to a 180* or 170* for that matter it doesn't promote the engine to run cooler automatically. And I must say that I've heard a lot about this V6 efan swap, but according to the only pictures i've seen, there looks to be NO difference in the diameter of the fan. Please feel free to critique my mod choices thus far & maybe shed a little light on the ones I obviously fail to grasp.

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  #2  
Old 05-28-2012, 02:35 AM
irnwkrkev irnwkrkev is offline
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WIth a six inch lift I imagine you are going to larger tires. I believe you can have the dealer change your speedometer programming to be correct to the oversize tires you install. This will help you get accurate reading of your true mileage.

Otherwise for every revolution of the bigger tires it will only account for the stock diameter and you'll think it's even worse then what you're getting......still no aftermarket programmers to do it yourself
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Old 05-28-2012, 03:27 AM
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Quote:
Originally Posted by The Goat View Post
Ok everyone, I have spent the last two weeks reading up on mods done or ones wanting to be done, & I must say WOW........ There's a lot of different ideas goin on out there, & quite honestly, it's very difficult to determine what's best for my application. So here goes my idea. My truck is an everyday driver first of all. I have 3.92 gears I opted for because I knew I wanted to lift the truck 6" Superlift K120B ASAP. These trucks are beautiful stock, so not much I want to do cosmetically, with the exception of a Bullbar, Lights, & nerf bars. However, I want to optimize my drivability as much as I can & preserve as much MPG as possible so............I've ordered the Vararam, Fastman TB, ARH w/Cats, & MagnaFlow 3" X 2.5" dual out. I'm still not sure I grasp the importance of the Catchcan or why when you change your Thermostat to a 180* or 170* for that matter it doesn't promote the engine to run cooler automatically. And I must say that I've heard a lot about this V6 efan swap, but according to the only pictures i've seen, there looks to be NO difference in the diameter of the fan. Please feel free to critique my mod choices thus far & maybe shed a little light on the ones I obviously fail to grasp.

Thanks
The Goat
Catch can is to catch the oil that goes through the pcv valve before it gets through the throttle body and built up in your intake manifold. It doesn't add performance, but it helps keep your truck performing as well as new.

The V6 fan swap is to get rid of the mechanical fan clutch, the V6 fan is an electric fan, so one less part for your engine to turn. Theroetically, it should help marginally in fuel economy and free up a bit of hp
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Old 05-28-2012, 10:11 AM
ceconant ceconant is offline
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My truck is on 35 and i tryed to have the dealer change my speedo. and i belive that the highest that they chould sit my truck two was like 28. What they told me is they chould only change the trie size in my computer to a tire size that dodge use on there vechcals.
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Old 05-28-2012, 10:28 AM
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^^ get your own programmer for tire ratio changes.
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Old 05-28-2012, 03:26 PM
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the more you mod enginewise, the more you want it to run cooler for safety's sake. A 180 tstat is cheap insurance for that. This works mechanically and is not controlled by pcm) ,you dont want it to run lean and end up like this..



with a lift and anything bigger than 33's, you wanna upgrade the gears to 4.56's..
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Old 05-28-2012, 06:07 PM
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Quote:
Originally Posted by chefred112 View Post
the more you mod enginewise, the more you want it to run cooler for safety's sake. A 180 tstat is cheap insurance for that. This works mechanically and is not controlled by pcm) ,you dont want it to run lean and end up like this..



with a lift and anything bigger than 33's, you wanna upgrade the gears to 4.56's..

I drive the Interstate 700 miles every two weeks. I do this all in one day, commuting to & from work. Wouldn't the 4.56 gears hurt my mpg's over the long driving range? I'll be running 35's on 20's btw.
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Old 05-28-2012, 08:22 PM
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for every inch that you raise your Ram, the more wind you are going to be bucking, the worse mileage you are going to get, unless you are drafting a semi truck like a Nascar driver
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Old 05-28-2012, 08:54 PM
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The 4.56s would hurt your mileage even running 35s, plus gears that tall typically are only aftermarket and most commonly are very loud. You caould honestly get away with 4.10s and still be quite happy with the performance/mileage, you just wouldn't have the stump pulling power the 4.56s would give you out of the hole.

The e-fan and thermostat are geared more towards keeping everything running smoothly and have less drag on the engine. When the block runs cooler there's less expansion of metals and you'll typically see tighter tolerances resulting in less lost efficiency. Same thing with the e-fan, by removing the clutch fan you'rer removing a device that adds a parasitic drain on the system as useable horsepower/torque is being used to turn the fan instead of the crankshaft.
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Old 05-28-2012, 11:18 PM
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Thanks guys,

Hey CDnoilRam, what would be a ballpark price to replace my gears w/4.10's & install the evan in place of my factory. At some point, the price of upgrades, completely overshadows the the benefits they bring ( monetarily speaking ). If I Keep this truck for 5 years, I would like to think that the performance upgrades PAID for themselves .
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