confused about headers...

[beenwrong2002]

I know hardly anything when it comes to engines, except how to check the oil...I keep reading how headers are one of the best things you can do to the 4.0 ohv for better performance (riight?? lol). Does the engine already have stock headers and ur just replacing them with "performance" headers or is it just a brand new part thats being introduced to the motor? Also what exacly do headers do? Also I head getting an "underdrive pulley" gives you performance also? do they have like a underdrive pulley kit that comes w/ everthing you need? I know these are noob questions but im a slower learner i guess

 

[hunterdan]

From what I've read, the underdrive pulleys are your best bang for your buck mod, followed by the E-fan, tune, headers, intake and exhaust. Not sure on the order of those, as far as performance goes. But most agree that the underdrive pulleys are one of the best things you can do without getting a tune. If you have the money for them, go ahead and get them. There is a set of pulleys made for the OHV and SOHC, I just can't remember who makes them.

 

[Afboy143]

From what I've read, the underdrive pulleys are your best bang for your buck mod, followed by the E-fan, tune, headers, intake and exhaust. Not sure on the order of those, as far as performance goes. But most agree that the underdrive pulleys are one of the best things you can do without getting a tune. If you have the money for them, go ahead and get them. There is a set of pulleys made for the OHV and SOHC, I just can't remember who makes them.

+1
Headers are good on the 4.0's. The 5.0's are the ones who benefit from it the most. Exhaust, intake, tune, UD pulleys, efan are the best in that order. The balancer alone is going to run you $245 on the UD pulley so its expensive.

 

[Turdle]

see-
buy a rolled v-8 and have a swap party.
I seriously believe this could be accomplished for a total out of 500.00 after you part out what you have-sell your engine-trans , extra parts from donor ect.

This will give you more power out of the box than the 4.0 ever thought of having. Even with over 1k in mods the 4.0 ohv is going to be anemic compared to a stock v8

you'll also gain a much MUCH more reliable transmission.

 

[aldive]

I Also I head getting an "underdrive pulley" gives you performance also? do they have like a underdrive pulley kit that comes w/ everthing you need? I know these are noob questions but im a slower learner i guess

UDPs are probably the best bang for the buck you can get.

Take a look at the install of mine at http://www.explorerforum.com/forums/showthread.php?p=1377150#post1377150 and http://www.explorerforum.com/forums/showthread.php?p=1394998#post1394998

 

[aldive]

http://hensonperformance.com/Productsften.html

 

[beenwrong2002]

is this all i need for the underdrive pulley http://www.stuffforyourranger.com/store/index.php?main_page=product_info&products_id=40&zenid=8e6150bd0d4de7ce2c7a9aab790e2963

also anybody have a link to the headers i would use on my 4.0 ohv

 

[aldive]

is this all i need for the underdrive pulley http://www.stuffforyourranger.com/store/index.php?main_page=product_info&products_id=40&zenid=8e6150bd0d4de7ce2c7a9aab790e2963

It depends on what you want to underdrive. Do you just want to UD the crank? or the water pump? or the alternator?

 

[Xan]

is this all i need for the underdrive pulley http://www.stuffforyourranger.com/store/index.php?main_page=product_info&products_id=40&zenid=8e6150bd0d4de7ce2c7a9aab790e2963

also anybody have a link to the headers i would use on my 4.0 ohv

you should order your pullys from james at hensonperformance.com hes a forum member (all though hes really busy with work right now) he will make sure you have everything you need for you 4.0. hes a bit of an expert on them, considering i think hes got the fastest 4.0 explorer on the site.

 

[beenwrong2002]

maybe i just should give up...i dont know enough to figure out what i actually need

 

[aldive]

maybe i just should give up...i dont know enough to figure out what i actually need

Never say never.

Maybe if you explain more clearly what you want to do, we can better help you.

 

[Xan]

maybe i just should give up...i dont know enough to figure out what i actually need

How are you gonna learn if you never do it?

 

[beenwrong2002]

yes thanks guys....i just want more UMPH from my explorer. headers and this underdrive pulley along with cold air intake, throttle body, etc is what I wanna do slowly. I wana start out with an underdrive pulley

http://hensonperformance.com/Productsften.html

do I need all that other stuff on that webpage or just whats labled "526400 Underdrive pulley* $255 "

 

[aldive]

Again, it depends on what you want. If you want the ultimate, then underdrive the crank and water pump.

 

[beenwrong2002]

Again, it depends on what you want. If you want the ultimate, then underdrive the crank and water pump.

thats a lot of money...maybe I should just save up to get a 5.0 dropped in and then go from there

 

[aldive]

Horsepower isn't cheap. The UDP is the best bang for the buck.

 

[beenwrong2002]

Horsepower isn't cheap. The UDP is the best bang for the buck.

how hard is it to install

 

[storlied]

I wonder if there's a chart telling which accessory takes #hp away.....

 

[aldive]

how hard is it to install

Not to difficult; take a look at how I did mine at http://www.explorerforum.com/forums/showthread.php?p=1377150#post1377150

 

[Xan]

yes thanks guys....i just want more UMPH from my explorer. headers and this underdrive pulley along with cold air intake, throttle body, etc is what I wanna do slowly. I wana start out with an underdrive pulley

http://hensonperformance.com/Productsften.html

do I need all that other stuff on that webpage or just whats labled "526400 Underdrive pulley* $255 "

I really don't think they are that much, you should really call james at his shop to get an exact anwser to what you need