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

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Old 04-01-2006
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Engine Mods?

O.K. I have a 06 fx4 auto extended cab with 4.0 ltr. milage 3,500 k.m.

I want to increase my power. Budget isn't a huge issue so here is my thoughts and questions.

- a larger exhaust? a single 21/2 inch exhaust...muffler?....dual 21/4 out?
- headers. which ones are available? does this affect what exhaust I should go with?
- a larger throttle body? is this worth while? how does this affect my choises above?
- a k&n filter. I know some of you don't like them, I am a huge fan so I am getting one.
- underdrive pullies
- chip....I am not sure if I want to do this or not....any helping feed back?
- any other suggestions?

I am going to take my truck to a dyno tune before I do all the mods. Then after instalation of everything I am going to see the difference. I will share with you my numbers. Thanks guys!!!
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Old 04-01-2006
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dyno tune? Thats what a programmer is for...
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Old 04-01-2006
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Just to get the horse power and torque rating at the wheels. to see the difference.
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Old 04-01-2006
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Bob, your first mod should be a tuner, it will give you the most bang for the buck and can adapt to any future mods.

after that i would go in this order:

intake (though it may be hard to find right now, volant is working on one)
efan
headers/exhaust
gears
and if youre serious, Explorer Express makes a supercharger kit

the underdrive pulley for your engine costs about $265 and gives you about 4rwhp, so i dont think its worth it.

youll find many of the parts you need on our site at www.JUSNES.com
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Old 04-01-2006
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Thanks...Why would I change my gears? I have 4.10s right now...Or are you talking gear drive...I find that gear drives are really noisey.

What about a larger throtle boddy?

Also what about installing highflow cats?

Last edited by The Great Scaper; 04-01-2006 at 05:16 AM.
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Old 04-01-2006
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Quote:
Originally Posted by The Great Scaper
O.K. I have a 06 fx4 auto extended cab with 4.0 ltr. milage 3,500 k.m.

I want to increase my power. Budget isn't a huge issue so here is my thoughts and questions.

- a larger exhaust? a single 21/2 inch exhaust...muffler?....dual 21/4 out?
- headers. which ones are available? does this affect what exhaust I should go with?
- a larger throttle body? is this worth while? how does this affect my choises above?
- a k&n filter. I know some of you don't like them, I am a huge fan so I am getting one.
- underdrive pullies
- chip....I am not sure if I want to do this or not....any helping feed back?
- any other suggestions?

I am going to take my truck to a dyno tune before I do all the mods. Then after instalation of everything I am going to see the difference. I will share with you my numbers. Thanks guys!!!

To answer your questions-
The best value on exhaust right now is the roush/slp kit on clearance at Hillbanks. $165 shipped for a single in/dual out kit.

The only headers available are JBA, although I think Gibson is coming to market with them. The JBA's are stout so you don't get the leakage and problems from thinner flanged headers. The only option would be ceramic coated vs chrome. I would get ceramic if the budget allowed it.

I am not sure a throttle body is on the market. I could be wrong on this. if the new Rangers have "drive by wire", then the 4.0 Mustang should fit it. if there's not one for the Mustang yet, there will be.

K&N is a reliable and proven brand. It's one of the few that are on the market for the 04+ Rangers. It will be noisier than a sealed box system.

Pulleys- Bob's comment about $265 for 4hp is off base unless everything else is quantified. I would have to see HP gains for a $400 chip or Hp gains for a $500 header or HP gains for a $130 E-fan before I agree. Even so, cost vs reward is an individual decision. The other point is the gain (whether 4, 8, 0r 12) is gonna be over the entire rpm band. That is generally not true with other mods. If a $300 exhaust loses 2hp through 3000 rpm and gains 5 from 300-4000 then gains 10 from 4000+ a better value? You have to look at the total picture.

Chip/tuner- definately needs to be fit into the equation. Go for a tuner over the chip. It should allow other functions that can help defray the cost like a code reader, code clearing, odometer adjustments for tire size changes and gear changes. I would get more info on where it fits in. If you have to get new tunes after intake, exhaust, etc it would be better to wait until after these mods. I don't know the answer on what mods need changes in the tune so I could be offbase on this.

Cats- look under the truck and start counting how many you have. Bring a kleenex because you may need to wipe some tears off your eyes. if anyone has a legal solution to this I am all ears.

There is also diminishing returns. A header will give x HP and an exhaust will give z hp but the two will not add up to x+z, mainly because they are helping to in the same area (air out). Air intake plus throttle body would be grouped together in the same way (air in). I would do a sweep of each area then fill in voids as money becomes available. If you have the funds to get it all done, you'll have a topnotch truck.

There are 3 things on the list that do nothing but add HP- the tuner, throttle body and the pulleys. Everything else will change the sound of the engine. Some love it but you can get to the point where you can't hold a conversation while driving. Having quiet mods has it's benefits for some.

Weight is directly related to HP. You can add intake/exhaust/pulley then go to 33" tires and you are back to stock speeds. I know someone this happened to. You can regear the rearend to gain a lot of it back but the extra weight will be a factor. Some are lucky to have their 'go mods' keep pace with your "slow mods". Besides wheels, it would include tool boxes, sound systems, brush guards, sub boxes, etc.

Other options include:

e-fan (will add some efficiency to the total package).

Camshaft- will move the power band up higher so it's not fading out before redline. Not a two hour install though.

Rockers- I haven't researched it for a 4.0, but this is basically a poor mans camshaft and is a fairly easy install. It lifts the valves higher so more air can get in or out.

Higher stall torque convertor- This would help tremendously at takeoff. Your HP at 1000 rpm is about 50HP, your HP at 3000 RPM is about 125HP. Logic dictates that the higher the rpm you leave at, the higher the rate of acceleration. My 60ft time at the track went from a 2.4 secs to a 2.07 secs in an s-10 I have. I contribute a lot to the higher stall convertor.

Traction- HP is nothing if you can't utilize it. Get a set of James duff traction bars. They are around $100 new. i would put this on your short list. It doesn't add HP, it allows you to use what you have.

Heads- another $$ heavy mod and thanks to the mustang having the same engine they are available now.

Supercharger- if you want to get past a bunch of 4-10 hp mods and get the most HP now, go with a supercharger. You generally get a 50% increase which should be in the range off 100HP. $4,000 is not bad. You would spend more than that on every other mod and probably not get close to that number. There's a guy here that is set up to sell the explorer express supercharger. I think it's Nickstersvt (apologies if I got the name wrong)

Keeping stuff fresh- let your spark plugs go too long and the gap will punch out so far that you will lose a percentage of the spark. No spark means the gas gets burnt in the cats, which is like running on 7 cylinders each time one doesn't fire. In the range of 40-50,000 miles shuld do it. The motorcraft plugs with the fine wire platinum is as good as any plug I have used.

If I get an extra $65 I'll get back to the dyno. My only two runs were stock at 180 HP and crank pulley at 188. My current set up is an e-fan, underdrive pullies (3 piece), roush slp/exhaust, and K&N intake. Headers and tuner are next on my short list. All in good time.

Good luck and have fun with the new truck.
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Old 04-01-2006
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wayne is right about the thunderbolt exhaust, i completely forgot about that, its def the way to go IMO.

as far as the pulley is concerned, wayne and i have debated for a long time about it in previous threads, its not worth getting into another argument, but the testing that i and doug from bamachips did shows that the mod is not really worth it. looking at the big picture, we showed small gains, if any. if i thought it was a worthwhile mod, i would say it was, because i sell the pullies too. if the pullies were $100, or even $150, i would say go for it, but right now, the price is just too high to justify IMO.

as far as the tuners, nobody has as much experience wtih rangers as doug from bamachips. i would really get the tuner first. once you start doing mods, say intake and exhaust, you may need a new tune, which would be free from bamachips.

for the throttle bodies, i know BBK and Granatelli are about to come to market with a single 70mm drive by wire TB any day now. whether or not it will work on the 06 ranger i couldnt say, in fact i dont even know if they are drive by wire in 06? a tb alone wont gain you much without an intake and DEFINATELY a tune.

as far as cams and heads, i dont know enough about the engines to give you good advice on them. Doug and D. would know a little more about it because they have worked more with the internals.
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Old 04-01-2006
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Definately hold out for the tuner its worth the extra $, I put a JET chip in since I got it for a deal but am still thinking about swapping for a tuner to play with adjustments and for the codes.
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Old 04-01-2006
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I say go with the K & N and get an aftermarket exhaust. I dont know if you are worried about your warrenty but most of these these add-ons will viod your warrenty.
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  #10  
Old 04-02-2006
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Look at it this way, you are 1/3 ahead of the game /w,4.0. i have a 3.0 2.73m/w apulley asnd e-fan and I'ND I'M NOT FULLY SATIFIED , CHANGING TO 3.27 GEARS FOR BEST fuel milae,and power. At A speed I can actually run long term. [ SOME HAVE QUESTIONEDNED ] MY FUEL MILAGE; i CAN GAURANTAEE POOR PERFORMSNCE at lower rpm's. I don't like 2.73 gears for the 3.0 because oh the los,of power. I HAVE ACHIEVED fUELMILAGE ,GAINS UP TO 27.25 FOR THE 3.0 vulcan , town milage varis acorrding tob youre foot.
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Old 04-03-2006
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Definately KandN stock replacement filter for highway. Ive heard the whole intake kits arent worth money, but I cant speak from experience. Since your driving on the highway think about the A/C Compressor switch if you run the defoger or heater on the drive.
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Old 04-03-2006
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hmmm..

First off Wow thanks for all the feed back!!

Second I am having a mental debate as to how far I should go.

I am seriously concidering the Supercharger. IF I did this I would also do the exhaust.

How does the intake work with the supercharger? As well can you still use a K&N or does the supercharger kit have it's own filter arangement?

Would you use a tuner with the supercharger?

The way you get passed the warranty is if it breaks down, you take the supercharger off and bring into the dealership like stock!!! hahaaha

Also how does the supercharger affect the gas milage better or worse?

Thanks again guys!!!
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Old 04-03-2006
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check out explorerexpress.com for the supercharger. you would still want a tune, doug and i have logged some dyno time on an EE 4.0 so he has a pretty good tune for it.

as far as gas mileage, if you keep your foot out of it it may help some! youll want to send a PM to rangerboy03lvl2, he just sold his ranger but he had an EE kit for a long time
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Old 04-03-2006
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Thanks for letting me know!
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Old 04-04-2006
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I tried to message him but I have not heard back.

Also If I do go the route of a supercharger, would that dictate going to a larger exhaust?

I am going to look under my truck on thursday so I am going to find out how many cats I have. Then see what I can do to improve the situation.
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Old 04-04-2006
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I would get the supercharger and nothing else at least for 90 days unless explorer express recommends it. Get comfy with the system and enjoy it. The other mods are gonna add 5-10(?) hp over the 80-100(?) HP the supercharger will give you. And they will be there if/when you need them.

The one item I would take exception to is the hillbanks exhaust. I heard they only have 5-6 kits left. When they are gone they are gone. The deal is too good to pass up.
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Old 04-05-2006
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How can I get this kit? Can you supply me with their email address? thanks again everyone. If you can post this i will call them tomorrow...or if you have their phone number. Thanks Guys BOB
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Old 04-05-2006
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go on ebay, the exhaust should cost 99.95. Or like "hillbanks motorsports". They have a website.

Aaorn
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Old 04-05-2006
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