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racer
Fordmods Stock as a Rock
Age:38
Posts: 107
Joined: 16 Jul 2007
Location: sydney NSW, Australia
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 Posted: Sat May 17, 2008 9:47 pm Post subject: |
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No i haven't. What i posted i got told by pacemaker.
I've got the 4480 on my car. I will measure them for self satisfaction. |
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Grimketel
Fordmods - Getting Side Ways
Age:26
Posts: 1108
Joined: 10 Jul 2007
Location: Bacchus Marsh VIC, Australia
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| Posted: Sun May 18, 2008 12:18 am Post subject: |
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| tickford_6 wrote: | | racer wrote: | | The reason the 4480 extractors are far better is that they have dyno tested them for the sallon race cars. The 4480 pacemakers are tuned length extractors (some length tubes). The reason why they are smaller in one section is that they will create a vacuum type suction affect to scavage all the gasesout of the engine which makes them work not just look good. |
ever checked the pipe lengths on the 4480s?
and there one reason the primary pipes are the lenght that are, and it nothing to with any dyno testing.
cylinders 1 and 6 run into the same collector, these pipes are as short as they can be given the distance between the two exhaust ports.
shorter would be better, but you just can't do it. you'll also find that most of the saloon cars run a custom header anyway. as it's one of the few things they are alowed to change. |
well I know bruce heinrich uses and helped develpe them. If it works for bruce in his all conquering falc i6, its good enough for me. what a champ.
also helps to note that cyliner 1 and 6 fire to help balance each other so stands to reason that their tuned length primaries are similar. |
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racer
Fordmods Stock as a Rock
Age:38
Posts: 107
Joined: 16 Jul 2007
Location: sydney NSW, Australia
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| Posted: Sun May 18, 2008 5:47 pm Post subject: |
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I have to admit they work so well.
I have the 4480 pacemakers, high flow 2.5 magnaflow cat, lukey ultra flow staight through 2.5 middle muffler & a 2.5 lukey hotdog rear muffler.
I felt gains right through the rev range.
If any one is to buy a set of exctrators the 4480 PACEMAKERS is the way to go. |
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tickford_6
Fordmods - Getting Side Ways
Age:25
Posts: 3714
Joined: 11 Nov 2004
Location: townsville QLD, Australia
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| Posted: Sun May 18, 2008 6:42 pm Post subject: |
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don't get me wrong guys, they are good thing.
i bought a set when they first came out for my XR6,
all i'm saying is they are a mass produced product, perfect design still has to make way for what will fit and what is cost effective to make. |
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