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Joined: Dec 2004
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CEG\'er
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So.... you are saying that the plenum has a use and that all of this time I thought I had power I really didn't? How does that plenum thing work anyway? I always thought that was just some form of restriction.
Last edited by Augi; 04/29/06 06:16 AM.
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The resonators are the restriction not the plenum. Read my quotes above. 
Originally posted by jd28:
Ummm whats the chance you have thread count per inch, over all length. But no problem if not, I'll pick up some to see which one is right.
Doh! Sorry, I didn't check this post 'til tongiht. Yeah, they are 6mm in diameter and 90mm long. Not sure about the thread pitch. Oh well, for future reference for somebody else... 
BP
Last edited by ButtonPuncher; 04/29/06 06:45 AM.
Ben ---'96 Contour GL * Zetec ATX * Tan on Black steelies---
+++JRSC M62 Under Construction+++
My big-a$$ mod list. 
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Originally posted by Augi:
So.... you are saying that the plenum has a use and that all of this time I thought I had power I really didn't? How does that plenum thing work anyway? I always thought that was just some form of restriction.
The Plenum doesn't restrict so much as it disturbs the flow of air. It's mainly there to keep a constant supply of air on hand, which a 90-degree bend can't give you.
J.T.
2002 Chevrolet Silverado 294ci V8. Custom CAI, headers on the way...
1997 Mercury Mystique Zetec ATX
Deceased February 2006
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Even wihtout the the plenum you'll see an increase in power. You'll just get less (if any) down low.
The stock plenum isn't the best design. I'd look for something that has more volume and is more condusive to laminar airflow.
Laminar = least amount of resistence & turbulence
Frank McCoy aka Mod-deth aka Mid Life Crisis aka SVT Doood aka mcgainer is a SCAM ARTIST
Pre98 Zetec - Some Mods
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Originally posted by ButtonPuncher:
Originally posted by jd28:
Ummm whats the chance you have thread count per inch, over all length. But no problem if not, I'll pick up some to see which one is right.
Doh! Sorry, I didn't check this post 'til tongiht. Yeah, they are 6mm in diameter and 90mm long. Not sure about the thread pitch. Oh well, for future reference for somebody else...
BP
NP Tap worked out good, it's a american brand name car it should have SAE bolts lol
About the plenum, I've been running without it for 5years. It does quite down the engine but does allow for a better take off with it on. However I do mostly intown (well all) and it's a stop sign or traffic light(usally red) at every corner, so in my case it's better, from what I'm seeing so far it looks like better MPG on the gas side of things.
I would say it depends on the power band your looking for, if you want more top end punch (while moving) the highflow with bend is mostlikely best because the air is moving already. If you do lots of stop and go, leaving the plenum on might be your best option.
JD a.k.a Fingers
"Don't Panic"
'98 Contour GL 2.0L VCT ATX 88k
'98 Contour LX 2.5L MTX 120k
Street racing can kill
just less of a chance with a 2.0
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After putting the plenum back on it reminded me of that stock look... So (never liking that green) went stock look lol minus the battery. 
JD a.k.a Fingers
"Don't Panic"
'98 Contour GL 2.0L VCT ATX 88k
'98 Contour LX 2.5L MTX 120k
Street racing can kill
just less of a chance with a 2.0
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If you want to, just get rid of the air box and put the round cyntrical filter on the end of the MAF sensor.
Later on you can get a GMK extension put on for cold air.
My ride(Cardomain link) :
'95 Contour 16V Zetec DOHC, Teal , ATX
Born on Sep. 4, 1995
86+ miles
*LEDs mods are on their way!*
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Originally posted by Kerry2Kool4U:
If you want to, just get rid of the air box and put the round cyntrical filter on the end of the MAF sensor.
Later on you can get a GMK extension put on for cold air.
I have a highflow K&N drop'n coming Tuesday. Funny after putting on the new valve cover (having no idea how we did this) didn't notice the big gap around the VCT. So going to work (good thing it's only 4miles) I could smell oil (not burning just a nice fresh oil smell) like someone just dump it into my vent system. Got home after work (didn't bother to lift before work) and look at the old to new valve cover and just drove the seal out (when I relized thats what it was) and drove it into the new cover (gentally) with out haveing to remove anything, but the sparkplug cover. At first it was a WTF but relized it was something easy... But yeah we knew what we where doing...
JD a.k.a Fingers
"Don't Panic"
'98 Contour GL 2.0L VCT ATX 88k
'98 Contour LX 2.5L MTX 120k
Street racing can kill
just less of a chance with a 2.0
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