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Joined: Apr 2002
Posts: 5
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OP
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Joined: Apr 2002
Posts: 5 |
I did a search on this board for my answer, but couldn't find it.
I just bought a 1999 Mystique LS (V6) and wish to learn more about it.
What are these "secondaries" people keep mentioning?
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Joined: Mar 2002
Posts: 1,040
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Joined: Mar 2002
Posts: 1,040 |
Try search again as follows:
secondaries/problem forum/subject only
You should get about 15 hits of prior posts.
98 Mystique LS v6 atx 110,000km
97 Contour LX v6 atx 125,000km
stock CD on LS, cass on LX
spoiler, tinted windows on LS only
4 wheel discs on LX only
All other available options on both
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Joined: Jul 2000
Posts: 778
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Joined: Jul 2000
Posts: 778 |
The intake manifold has a dual intake runner setup, versus a single intake runner setup like most other engines have. The "secondaries" are referred to as the second set of intake runners that are opened up by the IMRC (Intake Manifold Runner Control) at around 3200RPM at WOT (Wide Open Throttle) or 3900RPM at partial throttle. The intake runners are what provide air to the cylinder combustion chamber. The "secondaries" are a shorter and larger diameter set of intake runners designed to provide a faster and larger charge of air into the combustion chamber at higher RPM's (versus the intake runners that are always open at low RPM - which are smaller diameter and longer for smoother airflow). In short, it's why you feel that whoosh of power after 4k RPM in the Duratec powered cars...  Hope this helps...
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Joined: Jan 2001
Posts: 9,178
Moderator
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Moderator
Joined: Jan 2001
Posts: 9,178 |
If you would a visual aid here is a link to some pictures I took.
http://www.contour.org/forums/ultimatebb.php?ubb=get_topic;f=40;t=002020
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Joined: Apr 2002
Posts: 5
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OP
Junior Member
Joined: Apr 2002
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Joined: Nov 2000
Posts: 2,683
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Joined: Nov 2000
Posts: 2,683 |
Secondaries are non primaries. 
Howard
1998 Silverfrost SVT #1612
June mods:
17" ADR RS Limited Limix Wheels
with 215/45/17 Yokohama AVS Sports
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Joined: Jun 2001
Posts: 2,375
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Joined: Jun 2001
Posts: 2,375 |
those pics look strangly familiar~~
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