cold air induction, headers, exhauts - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 11-03-2010
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cold air induction, headers, exhauts

i have a 07 fx4 level II that i have bought recently. i have done a 3 inch body lift, as well as fitted 33x12.5x15 on it. i am now looking at doing some bolt on mods to it (not so much for power, but mileage). where i live it gets really cold in the winter time and was thinking about doing a cold air induction kit on it, but not sure if that would be good for the winter time. i am also looking at doing headers and a exhaust system for it as well. i know with them the mileage will increase some, but not sure if the cold air kit will. more worried what it will do in the winter. any feed back, or ideas?
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Old 11-03-2010
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im curious as well. i have wondered how much of an increase, if any, you will see with headers and an intake
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Old 11-03-2010
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i have a CAI on mine and contrary to what JP7 thinks...i have better throttle response and have seen a 1-3 avg. MPG increase...i am running manifolds though
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Old 11-03-2010
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ok, how is it for winter however?
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Old 11-03-2010
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will be fine...its dipped down into the 20s past couple nights and truck runs great...and it sounds BA with all that air being sucked in
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Old 11-03-2010
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20F i'm not worried about. here it can go as cold as -50C (-58F)
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Old 11-03-2010
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oh wow
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Old 11-03-2010
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i think as long as you keep your inner fenders in it would be fine... however i may look at a dry flow filter from AEM, instead of a oiled filter from K&N. however i think for the money u plan on spending on headers, a tune would yeild much more power and, going that route a custom tune would be even more, then you can tighten up your trans a little forthe 33's and get more power and milage. you can have mulitple pages writen, like an economy tune. food for thought. im not saying no to headers in the least bit, but i would go with a tune first
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Old 11-03-2010
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Im pretty sure you will be fine with -58*F After all they say the colder the air into the engine the better.
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Old 11-03-2010
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Originally Posted by fourliter dan View Post
i think as long as you keep your inner fenders in it would be fine... however i may look at a dry flow filter from AEM, instead of a oiled filter from K&N. however i think for the money u plan on spending on headers, a tune would yeild much more power and, going that route a custom tune would be even more, then you can tighten up your trans a little forthe 33's and get more power and milage. you can have mulitple pages writen, like an economy tune. food for thought. im not saying no to headers in the least bit, but i would go with a tune first
x2
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Old 11-03-2010
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i was also tossing around a tune, and having a local speed shop do a custom tune to it. they did a friends 06 f250 for him that he was more then happy with. i would think a tune would be more suited to be done after any mods so it could be programed with them already on the truck, and not afterwards. in other words i could drive up there, say "i have this done, and that done" instead of "i want to do this afterwards, and that afterwards" and not get around to it.
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Old 11-03-2010
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Originally Posted by vroomzoomboom View Post
i was also tossing around a tune, and having a local speed shop do a custom tune to it. they did a friends 06 f250 for him that he was more then happy with. i would think a tune would be more suited to be done after any mods so it could be programed with them already on the truck, and not afterwards. in other words i could drive up there, say "i have this done, and that done" instead of "i want to do this afterwards, and that afterwards" and not get around to it.
exactly. if you werent planning on i/h/e i would say just tune it but with these the tune will be able to be adjusted more. bolt ons and tuning are mutually beneficial, if its not pulling on the dyno then its not tuning.
people say the intake is designed to flow more then enough and all that but the actual box inlet for air, after the filter in front of the maf, is like 2" maybe. it has sharp square corners instead of a nice smooth venturi so flow is being impeded there and things arent much better with the rubber arm where it seems to expand almost out to 3.5".
for the exhaust keep it single in single out and flowthru design for best scavenging and performance

how to ditch the airbox completely
http://www.truckinweb.com/tech/0909t...dup/index.html
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Old 11-03-2010
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I'd get a dry flow intake, tuner and a catback exhaust. I havent heard much about people doing headers.
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Old 11-04-2010
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Don't expect gains from a tune like a PSD though. Their computers are so low tuned to begin with. SO when you do tune them, it's easy to add 100HP and 150TQ. The computers on a Ranger are almost maxxed out; over tuning would get some serious power, but crap gas mileage. So maybe like a 10-12 HP increase and 15-20ftlbTQ. Of course I could be wrong about those numbers. I actually get less gas mileage with the tune that I use which is a 93 Octane Towing tune, but it's only like a .5 MPG less compared to stock and I tow alot too, so that has alot to do with it also. However running around town in the winter time (when not pulling the mowers) I get about 2 MPG's more compared to stock.
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