what headers should a person get if they are looking for low rand power. e.g when you put the foot down from start?

i know some will disagree

but the 4480 comps are what you want

wtf? why would u want competetion headers desgined for low to mid power?

because they are not a competion header..

they are too small... go do a little research on headers. then make an informed judgment

I dunno, I don't name them, I just use them!

Well i did a diagnostic and the only error thrown was 116 which is for my ECT sensor.

I did the test with a cold engine, should it of been warm first?

4499
Prim. Pipe - 1 5/8" 41mm
Sec. Pipe - 1 7/8" 48mm
Outlet (flanged) - 2 ½" 63mm

4480
Prim. Pipe - 1½" 38mm
Sec. Pipe - 1 7/8¾" 44mm
Outlet (flanged) - 2 ½" 63mm

Thats the only difference from the 2. So whats best?

Taken from the website.
www.pacemaker.com.au

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The 4499 are above the 4480, just need to scroll up to see the details.

Thats not the only difference.
pipe length is different. the 4499 are 6 into 2 into 1
the 4480 are 6 into 3 into 1.

what is the best depends on what you want out of them

you probably wont notice a whole lot of difference, unless your absolutely hammering along, the power gain from what i noticed wasnt anything spectacular with a better air intake, and paceys/2.5" but it should be more responsive than it was before.. (ie time it takes the car to move faster, from when you plant your foot should be shorter) it will also take the ecu a week or two to adjust to the changes, depending how much you drive..

as far as the sound goes, when they are first fitted, they sound disapointing quiet and crap... the car will sound completely different in about 2 weeks-a month, the sound is dependant on normal exhaust buildups like carbon in the exhaust system, once its run in - it will sound alot better.

back to the power increases, as i said they wont be anything special...the idea behind a better intake, and exhaust isnt to make the car go faster or harder, its to have better continual flow and less restrictions, to work in conjuction with other mods like cam, headwork etc etc, you might notice perhaps a 5-10% difference after the intake and exhaust are done, but when other mods are performed to your car ie a cam, it will magnify that 10% to say %15,

the basic principle i believe in making a car perform better (anyone correct me if im wrong) is creating a car with least perfomance restrictions possible.. wether its restriction due to not enough of air, fuel, pressure, combustion, spark, poor gear ratios, too much weight, too much backpressure or not enough, too much loss to the driveline, engine components too hot etc etc

by fitting your air intake, and exhaust you have eliminated some of the air flow restrictions and some of the excessive backpressure restrictions, thats only two boxes you've crossed off the list out of 100's of items you could improve on, dont be too disheartened

I was very happy with mine. I did a before and after dyno thats in the gallery so you know they worked for me.

Should be able to tell the difference really though.

If you look at my dyno results despite all the talk of where they should work they actually gave good gains down low better gains up top and in the mid range not much. this on a BBM AU of course with larger exhaust valves than the E series except XR6.

I'm still not sure, but I'm with Frank on this one.

Comp headers, are more designed for top end, so unless your doing over 100km/h and in the high rpm, you wont feel all that much. So they should provide a better 1/4 mile time, as they have the mid and high range down pact (Just my opinion)



When you get your muffler fixed, you might feel some difference, but give it a week or two, and it might change. Remember you've already done a fair amount of mods without the extractors, so the headers might not add that much on top of what you've got.

Cheers

comp series is only a name.
the ph4088 ARE NOT a competion header.
go have a look at the posted dyno graphs. they show power being up over the entire rev range. not just the top end.

peak power is up by 10kw. you can clearly see the change point for the BBM. right fromt he start of the graph power is up at some points by 10kw but 7kw on average.
if they were are competion header designed for top end power would be down at lower revs.

the ph4088 is an all round header with a focus on low mid power.
just as i have said befor and just as pacemaker said when the ph4088 was realised.


http://www.fordmods.com/forums/gallery. ... f=2058&m=0

me too. this isnt the only mod ive got, also stage 3 its engine and xh snorkel and k+n filter and ea tb to abox pipe. all except engine was in before headers and even then i only felt high end gain (realy only in 3rd over 100...whoo!) now with its engine.....WHOOOOOO!