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  #1  
Old 11-24-2013, 06:20 PM
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Other Mods for greater Performance?????

On my 02' Overland I already have a 77 series K&N intake and a Flowmaster on it. What other mods can i put on it for increased performance?? torq, HP.. any suggestions??
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  #2  
Old 11-24-2013, 07:24 PM
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Re: Other Mods for greater Performance?????

My reading leads me to these as the best bang for your buck mods on the 4.7HO
- 3" exhaust with high flow cat and muffler
- CAI (you already have this)
- Tune of some type: SCT offers more control, SuperChips is really easy and I had good success with the SC on a 4.7 powered 2006 RAM
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Old 12-03-2013, 01:27 PM
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Re: Other Mods for greater Performance?????

Add a chip and throttle body
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Old 12-11-2013, 11:35 AM
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Get a jet stage 2 chip with the new thermostat. Or pony up and get a vivid linq
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Old 12-13-2013, 12:44 PM
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Re: Other Mods for greater Performance?????

(You don not want to go any bigger than 2" on the exhaust)
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Old 12-13-2013, 01:25 PM
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Re: Other Mods for greater Performance?????

Quote:
Originally Posted by mtebb94 View Post
Get a jet stage 2 chip with the new thermostat. Or pony up and get a vivid linq
jet chips are junk, ran one before. get a tuner
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Old 12-13-2013, 01:27 PM
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Re: Other Mods for greater Performance?????

Quote:
Originally Posted by Gus9890 View Post
(You don not want to go any bigger than 2" on the exhaust)
id run at least a good 2.5 to 3 inch, it after all a v8. im running 2.5 all the way from the headers on my 3.7
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Old 12-16-2013, 06:12 PM
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Re: Other Mods for greater Performance?????

Headers are pretty hard to find for the 4.7, due to the tiny amount of space that's left after the 4.7 is stuffed in. Plus headers are used to up Horsepower and can actually decrease your torque. Your call. I have a 01 4.0 and I straight piped her all the way back. gutted all 3 cats and cut off that restrictive factory muffler. Im running 2.5" all the way back and have gained an extra 6mpg, not to mention the pickup has improved quite a bit. next look at getting a $$Nice$$ tuner (superchips), and Upgrade to a larger throttle body(BBK). I added E3 plugs and gained an instant 7mpg, With greatly improved Throttle response. In the 4.7HO most of the internals have been upgraded so I cant really think of any engine upgrades you could do without dropping thousands. So when it comes down to it:
1. Straight pipe/ High Flow cat with 3" all the way out
2. Tuner
3. Throttle Body
4. Plugs
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Old 12-16-2013, 06:50 PM
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Quote:
Originally Posted by 4.0_4x4 View Post
Headers are pretty hard to find for the 4.7, due to the tiny amount of space that's left after the 4.7 is stuffed in. Plus headers are used to up Horsepower and can actually decrease your torque. Your call. I have a 01 4.0 and I straight piped her all the way back. gutted all 3 cats and cut off that restrictive factory muffler. Im running 2.5" all the way back and have gained an extra 6mpg, not to mention the pickup has improved quite a bit. next look at getting a $$Nice$$ tuner (superchips), and Upgrade to a larger throttle body(BBK). I added E3 plugs and gained an instant 7mpg, With greatly improved Throttle response. In the 4.7HO most of the internals have been upgraded so I cant really think of any engine upgrades you could do without dropping thousands. So when it comes down to it:
1. Straight pipe/ High Flow cat with 3" all the way out
2. Tuner
3. Throttle Body
4. Plugs
i picked up 3tenths in the 1/8th puttin headers on my v6. If thats not tourqe idk what is
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Old 12-16-2013, 07:28 PM
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Re: Other Mods for greater Performance?????

Quote:
Originally Posted by Strongjeff View Post
i picked up 3tenths in the 1/8th puttin headers on my v6. If thats not tourqe idk what is
Headers are great on V style engines however they are not benefitial for the L6's. Sorry should have clarified. Take a look at the 4.0 exhaust manifold, stock its really not that bad. On the other hand take a look at the 4.7 manifold, its awful. My point was that its hard to fit a set of headers into a 4.7 without some fab and relocation. But headers on the 4.0 really wont help you out too much, and may cause a loss of torque. Inlines get a fair amount of torque from back pressure.
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Old 12-16-2013, 07:38 PM
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Re: Other Mods for greater Performance?????

Quote:
Originally Posted by Strongjeff View Post
i picked up 3tenths in the 1/8th puttin headers on my v6. If thats not tourqe idk what is
Trust me on this one I have done a great deal of research on headers for inlines. Before my WJ I had a 92' F150 with the Ford 300 in it (4.9 L6). I loved that engine, had amazing low end torque, 265 ftlbs @3k but only had about 145 hp, and I wanted to squeeze as many horses as I could out of her.
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Old 12-16-2013, 07:48 PM
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Quote:
Originally Posted by 4.0_4x4 View Post
Headers are great on V style engines however they are not benefitial for the L6's. Sorry should have clarified. Take a look at the 4.0 exhaust manifold, stock its really not that bad. On the other hand take a look at the 4.7 manifold, its awful. My point was that its hard to fit a set of headers into a 4.7 without some fab and relocation. But headers on the 4.0 really wont help you out too much, and may cause a loss of torque. Inlines get a fair amount of torque from back pressure.
i dont think its the design of the engine that causes the loss of tourqe in the 4.0. I think a lot of it has to do with the heads on the 4.0, i have seen plenty of inline engines benifit from headers. Also header design is very inportant
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