i have the 4.6l engine in my truck
here are a couple of upgrades i have been looking at for more power..

Manifold

Carbouration

Larger fuel injectors

Jba headers

can anybody give me input on any of these upgrades or let me know of some better ones?
and for the larger fuel injectors what cc should i run because there are lots of choice sizes to run out there.

Also, the upgrades i have as of right now are a php programmer, cold air intake and a flow 40

 

What year 4.6?

Manifold = about the only thing out there is a aftermarket mustang manifold and you would lose what little torque you have.

Carbouration =

Larger fuel injectors = You'll get NO benefit or power from bigger injectors!

Jba headers = JBA only make shorty headers. Wast of time and money! You need long tube headers to get any power increase.

Phil

 

 

Ok dude, first of all you want http://www.summitracing.com/parts/PSM-72C2229/ these headers. You will need some y pipes part number 82_116. cant remember what site it might also be summit or jegs.

 

 

Also I have a K&N Cai and Diablo sport programmer. These both help your throttle response. I read around about a 75mm TB for our motors. If installed you get better fuel eco, like maybe 3 hp or more. probly somthing you wouldnt want for 200 bucks. Im deciding to go with 4:10 gears and those headers with some high flow cats. This should improve performance to were i need it. Just to give you some ideas.

 

since we don't know what the OP drives (other than a 4.6) are you sure the headers in that link are gonna work on his truck??? not to mention the 3 valve 5.4 and the 2 valve 4.6 use different heads and intakes and exhaust manifolds


429 boss mustan, seriously man, c'mon now a lil comon sense goes a long ways

 

That's why I asked what year he has,
kinda hard to help without knowing.
4.10s are a great upgrade though no matter what he has.

Phil

 

as usual you are correct phil, but the link 429 boss mustan posted claims that the 3 vale 5.4 and the 2 valve 4.6 use the same header my post was aimed him not you

 

Yes,I was just agreeing with your post. I guise I should of just put the old X2
I knew it was for the new guy.

Phil

 

 

maybe i should of read that better. Im sorry for my ignorance and stupidity. But maybe he has the same truck or not. But if he does he can use this information.

 

no crap, no personal attack intended or meant, sorry you felt that way


I just want to clarify: the 3 valve 5.4 engines use a different header than the 2 valve 4.6, if people listen to bad advice ie what's posted on the summit site they are gonna be spending money they can't afford to

 

I got ya thier. They actually told me of two headers that fit. Forget the other one but it didnt say it fit the 4.6 so i kinda ignored them. So I read through his post he has a 2004 f-150 with a 4.6. Theirs no updates about a new truck.

 

well i just sent a email to pacesetter and see what they have to say.