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Old 04-16-2004, 07:37   #1 (permalink)
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Extractors?

Short style vs long style(like Mock) extractors ?

where do each type help make power and torque ?

I think it is short help top end but compromise bottom end while the long are the opposite but am not quite sure ?
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Old 04-16-2004, 10:16   #2 (permalink)
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Re: Extractors?

Big bore, short length generally make more power at higher revs. Smaller bore, long length generally makes more torque accross the range. Torque is what you want, as torque x revs = power. So the flatter you can get that torque curve, and the harder you can rev the car means more power. Peak power at high revs results from a steep torque curve, not a flat one. For a typical 6cyl Falcon, if you can get peak torque around the 2000-2500 rpm mark and keep it there till 4000-4500, you will do everything quicker.
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Old 04-18-2004, 07:28   #3 (permalink)
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Re: Extractors?

If you're buying a standard set (as opposed t making your own), just ask for performance curves for your engine and evaluate the different styles of extractors on paper.
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Old 04-19-2004, 06:27   #4 (permalink)
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Re: Extractors?

dude, get the new comp series from Pacemaker.....best on the market...

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Old 04-19-2004, 07:39   #5 (permalink)
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Re: Extractors?

The comp series are the same as the Mock race headers, they are very long, good for high end power, but crap for torque.
I have the Standard Mocks(HiTechs), and they are very good, heaps of torque, and a nice amount of power with w good exaust.
If you go the race series you will loose alot of your bottom end, which i personally like to have nice and fat.
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Old 04-19-2004, 07:44   #6 (permalink)
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Re: Extractors?

well I think quikcorty would disagree with that...

where is he anyway? he would normally be on this like a fly on shit...

Dave...
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Old 04-19-2004, 08:09   #7 (permalink)
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Re: Extractors?

Long primaries move the power curve towards the bottom of the rev range. Short fat ones are better for high revs.
It's more about tuning at low revs, the length of the primary determines how much the extractors scavenge the engine. At high revs, you're just interested in pushing as much gas through as possible.

Personally, I agree with the above - Look at all the figures, and pick a set that'll suit your driving style best.
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Old 04-19-2004, 17:13   #8 (permalink)
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Re: Extractors?

Quote:
Originally Posted by mongrelEB
Long primaries move the power curve towards the bottom of the rev range. Short fat ones are better for high revs.
This is true. The pacemaker comps an the new "longer" mock extractors are designed for a flatter torque curve, at the expense of top end power. i found my car to be MUCH more drivable at both high and low rpm with the pacemaker comps, i couldnt recommend them more.

the older pacemakers were very big and short in the primaries, which is why they have a bad rep on the ford i6 as being only for top end power.

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Old 04-19-2004, 17:22   #9 (permalink)
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Re: Extractors?

so wat wood u guys recommend for low end power, coz its not like ill be driving over 140 on the streets anyway i wanna plenty of low down power up until 140-150km/h
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Old 04-19-2004, 20:06   #10 (permalink)
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Re: Extractors?

pacemaker comp series...

Dave.
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