Performance Intake manifold - Focus Fanatics
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace

Go Back   Focus Fanatics > Ford Focus First Generation > ZETEC Performance (2000-2004)

ZETEC Performance (2000-2004) The place to chat about any 2.0L Zetec engine performance, tuning and exhaust related upgrades.

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Thread Tools Display Modes
Old 04-05-2010, 11:02 PM   #1
Focus Enthusiast
Join Date: Oct 2008
Fan#: 59871
Location: Theext, Canada
What I Drive: Car

Posts: 61
FF Reputation: 1 atycki Good Standing Member
Buy-Sell-Trade Rating: (0)
Performance Intake manifold

Hi guy.

I read about how header will help with power. I was wandering, since aftermarket headers help with power. Like the 4 to 2 to 1, for the torque or the 4 to 1 for the HP, and wanted to know if there is something like that for the intake side of the engine.

I wanted to try a 4 to 2 to 1 intake manifold. I'm sure I'll have to do some cg wind tunnel tests to see how the air coming in from the initial opening will spread into the two smaller pipes, and from those two, to the four that feed the engine.

I waned to know some input with your thought. I'm willing to put in the time to get more MPG.

atycki is offline  
    Reply With Quote
Sponsored Links
Old 04-05-2010, 11:07 PM   #2
Focus Addict
Join Date: Sep 2008
Fan#: 59327
Location: NC
What I Drive: 2004 Red Zx3

Posts: 1,158
FF Reputation: 9 NAD23ZX3 Good Standing Member
Buy-Sell-Trade Rating: (1)
It'd end up being more of a restriction than a power adder.
NAD23ZX3 is offline  
    Reply With Quote
Old 04-05-2010, 11:13 PM   #3
Focus Enthusiast
CarDemon's Avatar
Join Date: Mar 2009
Fan#: 63700
Location: Dundee, MI
What I Drive: 2003 Silver ZTS

Posts: 514
FF Reputation: 3 CarDemon Good Standing Member
Buy-Sell-Trade Rating: (18)

From what I understand, it's a little more complex than that. The issues surrounding intake flow and exhaust flow are quite different.

On the intake side, there are a couple of options: You can find a 2000 IM (which is one piece instead of two) and port it for better flow. You can often find them on the buy/sell/trade thread below. Alternatively, Ford Racing also makes a great aftermarket intake manifold, although it's pricey and requires a 70mm throttle body. If you go with a forced induction set-up, many of the superchargers have their own IM. Finally, there are a few guys who have experimented with individual throttle bodies for each cylinder, but that gets crazy expensive.

Hope that helps.
Who by worrying can add a single hour to his life?
CarDemon is offline  
    Reply With Quote
Old 04-05-2010, 11:25 PM   #4
I need BOOOOST!!!!!!
focusmaniaczx3's Avatar
Join Date: Apr 2008
Fan#: 55157
Location: conover, NC
What I Drive: zx3 turbo, kia soul, 71 chevy c/10

Posts: 5,982
FF Reputation: 35 focusmaniaczx3 Great Standing Member
Buy-Sell-Trade Rating: (14)
be careful fabricating your own intake manifold. you could easily hurt the performance of the engine if you dont know exactly what you are doing. ford racing makes a very nice intake manifold that costs about $700 if i remember correctly and you can only run the ford racing 70mm throttle body with it which costs another $350. they are GREAT pieces but very expensive. if you get lucky you might stumble across a focus central IM which work pretty well and can be used with a stock or aftermarket 65mm throttle body of your choosing. those are extremely rare as not many were made and focus central is out of business now. you may also luck up and come across a custom "log style" intake manifold. generally these can be a pretty safe bet because 90% of the ones ive come across came off heavily turboed engines but once again you need to be wary of the custom jobs because they could cause more problems than good. if you see one you like run it through here and get the opinions of some people.

another thing to note is that most of the aftermarket intake manifolds arent going to do you very much good unless you have a super hard core N/A build or are using some type of forced induction like turbo, supercharger, or nitrous. a ported 2000 IM isnt all that great either. you might net 1-2 hp at most and probably will pick up a little better throttle response but that would be it. on a bolt on engine you would probably have a pretty severe drop in bottom end power with anything except the 2000 IM.
focus-power P&P head $1100
focus-power DIY turbo kit $1495
tom's first time in Vegas? PRICELESS!
Originally Posted by 1turbofocus
I love this big little city HOOTERS !
Every time you drink a beer somewhere an ugly woman becomes beautiful, so get to it!
focusmaniaczx3 is offline  
    Reply With Quote
Old 04-06-2010, 08:16 AM   #5
FF Affiliate
1turbofocus's Avatar
Join Date: Oct 2003
Fan#: 1123
Location: Belmont, NC
What I Drive: 2000 ZX3 / 2002 SVT Turbocharged

Posts: 21,768
FF Reputation: 153 1turbofocus Excellent Standing Member 1turbofocus Excellent Standing Member
Buy-Sell-Trade Rating: (28)
First dump the headers your talking about and get the SVT header if the best is what your after

Focus-Power: Your #1 Source for Ford Focus Speed, Tuning & Performance!

Customer Support
AIM: hpdyno
Phone: 704-249-3745

Elder 1turbofocus
1turbofocus is offline  
    Reply With Quote
Old 04-06-2010, 09:13 AM   #6
Sückn' n Blown
Egz's Avatar
Join Date: Sep 2003
Fan#: 442
Location: Tappahannock, VA
What I Drive: 2003 2.3l ZX3

Posts: 7,742
FF Reputation: 111 Egz Excellent Standing Member Egz Excellent Standing Member
Buy-Sell-Trade Rating: (3)
Originally Posted by CarDemon View Post

From what I understand, it's a little more complex than that. The issues surrounding intake flow and exhaust flow are quite different.
Not to mention header design works on using scavaging to help increase exhaust velocity, and I'm pretty sure it doesn't work in reverse.
January 2008 Focus Fanatics ROTM
2003 Ford Focus ZX3 2.3l N/A = 221 HP, 162 ft-lbs, 13.967@100.88MPH
2006 Ford Fusion 2.3l Turbo = 244HP, 247ft-lbs - Duratec Wiki - Sign up and contribute!
Egz is offline  
    Reply With Quote

Bookmarks & Social Networks
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -5. The time now is 01:17 AM.

Copyright 2002-2014 All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.