Duratec manifold spotters guide. - Page 4 - Ford Focus Forum, Ford Focus ST Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Ford Focus Forum, Ford Focus ST Forum > Ford Focus Second Generation > DURATEC Performance (2008-2011)

DURATEC Performance (2008-2011) The place to chat about any Duratec 20 engine performance, tuning and exhaust related upgrades.

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

Reply
 
Thread Tools Display Modes
Old 02-21-2014, 05:31 PM   #31
sailor
"Elder"
 
sailor's Avatar
 
Join Date: Jun 2008
Fan#: 57268
Location: Williamsville, NY
What I Drive: 2004 Pitch Black ZTS 2.3 5spd.

Posts: 15,662
Points 10,881, Level 69
Points: 10,881, Level: 69 Points: 10,881, Level: 69 Points: 10,881, Level: 69
Level Up 8% Completed
Level up: 8% Level up: 8% Level up: 8%
Forum Activity 99%
Activity: 99% Activity: 99% Activity: 99%
FF Reputation: 73 sailor Excellent Standing Member
Buy-Sell-Trade Rating: (0)
Tx - it helps others to hear from someone who's done it!

Seems to me that some got the impression just removing the flaps would help with low speed power & economy.

Feedback that it doesn't helps avoid the mistake of doing it for that reason.
__________________
"Rubber Side Down"

S.R. #275
sailor is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 10-20-2014, 06:15 PM   #32
Red_Sonja
Focus Enthusiast
 
Red_Sonja's Avatar
 
Join Date: Feb 2008
Fan#: 53953
Location: Redding, CA
What I Drive: 2006 ZX4 ST, RIP, Infra-Red ZX3 SVT

Posts: 83
Points 958, Level 16
Points: 958, Level: 16 Points: 958, Level: 16 Points: 958, Level: 16
Level Up 58% Completed
Level up: 58% Level up: 58% Level up: 58%
Forum Activity 3%
Activity: 3% Activity: 3% Activity: 3%
FF Reputation: 1 Red_Sonja Good Standing Member
Buy-Sell-Trade Rating: (4)
Sorry for the resurrected thread... but i just purchased a D23 focus and wonder why the Escape D23 can run OK without these tumbler flaps? I don't think the Ranger D23 has them either, not sure about the D25. Seems to me that mid to high rpm they are a real restriction.
Red_Sonja is offline  
    Reply With Quote Quick reply to this message
Old 10-21-2014, 04:35 AM   #33
BowerR64
Focus Fanatic
 
BowerR64's Avatar
 
Join Date: Sep 2010
Fan#: 78699
Location: Kansas city, MO
What I Drive: 2007 ZX3 SE

Posts: 2,379
Points 11,745, Level 71
Points: 11,745, Level: 71 Points: 11,745, Level: 71 Points: 11,745, Level: 71
Level Up 24% Completed
Level up: 24% Level up: 24% Level up: 24%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 12 BowerR64 Great Standing Member
Buy-Sell-Trade Rating: (2)
Quote:
Originally Posted by Red_Sonja View Post
Sorry for the resurrected thread... but i just purchased a D23 focus and wonder why the Escape D23 can run OK without these tumbler flaps? I don't think the Ranger D23 has them either, not sure about the D25. Seems to me that mid to high rpm they are a real restriction.
I thought the larger engine has a different intake that changes runner lengths? Read through more posts on this intake to find more info about it. The cheaper 2.0 engine they try to make up for the single length intake with the flaps. The 23 intake is a way better design but its a more advanced system and im sure more cost.

One length helps the power in lower RPMs and the other in the upper RPMs.

Or maybe they remapped the way the fuel is delivered?

I think Tom could of fixed my issue in the lower RPMs but i had a second issue deleting the PCV valve caused an oil smell inside my cabin and i couldnt stand it so i ditched everything and went back to the stock one.

If i could of fixed the oil smell in the car i may have stuck with the flapless intake but i was worried it wasnt good for my health so i removed it.
__________________
It's not important to win, it's important to make the other guy lose.
BowerR64 is offline  
    Reply With Quote Quick reply to this message
Old 10-21-2014, 09:33 AM   #34
felixthecat
w/ my magic bag
 
felixthecat's Avatar
 
Join Date: Nov 2010
Fan#: 80663
Location: Renton, WA
What I Drive: '05 Silver Sport Technologies

Posts: 10,070
Points 11,251, Level 70
Points: 11,251, Level: 70 Points: 11,251, Level: 70 Points: 11,251, Level: 70
Level Up 1% Completed
Level up: 1% Level up: 1% Level up: 1%
Forum Activity 95%
Activity: 95% Activity: 95% Activity: 95%
FF Reputation: 60 felixthecat Excellent Standing Member
Buy-Sell-Trade Rating: (0)
Talking

Quote:
Originally Posted by Red_Sonja View Post
Sorry for the resurrected thread... but i just purchased a D23 focus and wonder why the Escape D23 can run OK without these tumbler flaps? I don't think the Ranger D23 has them either, not sure about the D25. Seems to me that mid to high rpm they are a real restriction.
The escape 23 is the only 23 that doesn't have imrc (tumble flaps) for some reason. The ranger 23 uses a 20 head w/ the 20 single runner i/m as the other 20's. If you want to see how your 23 runs w/ the flaps open, remove the vacuum line coming off the i/m feeding the passenger side solenoid & plug it off. You'll see the actuator linkage behind the t/b stay in the upright position, meaning the the flaps are open. When you do this the cel will illuminate. Once you do that, see how it runs & what you think. You'll notice it at off idle. The cel will go off when you reconnect the vacuum line.
__________________
Introduce Mr. Torsen to the mixBigger brakes then you- D23 crew- D-Tech- Sedan Revolution= #131
felixthecat is online now  
    Reply With Quote Quick reply to this message
Old 10-21-2014, 08:50 PM   #35
sailor
"Elder"
 
sailor's Avatar
 
Join Date: Jun 2008
Fan#: 57268
Location: Williamsville, NY
What I Drive: 2004 Pitch Black ZTS 2.3 5spd.

Posts: 15,662
Points 10,881, Level 69
Points: 10,881, Level: 69 Points: 10,881, Level: 69 Points: 10,881, Level: 69
Level Up 8% Completed
Level up: 8% Level up: 8% Level up: 8%
Forum Activity 99%
Activity: 99% Activity: 99% Activity: 99%
FF Reputation: 73 sailor Excellent Standing Member
Buy-Sell-Trade Rating: (0)
When mine were intermittently malfunctioning (bad vacuum hose) the effect I noticed was a definite loss of power at very low throttle openings.

Red_Sonja - to relate this to your Escape question, I might guess that when used in that larger vehicle the engine isn't operating in that same range often (if at all). Combine a larger vehicle with an automatic transmission & I doubt it spends much time in the low rpm range I often use with a manual trans in a Focus. Automatic would let it rev higher to get similar acceleration in the heavier vehicle.
__________________
"Rubber Side Down"

S.R. #275
sailor is offline  
    Reply With Quote Quick reply to this message
Old 10-22-2014, 03:21 AM   #36
BowerR64
Focus Fanatic
 
BowerR64's Avatar
 
Join Date: Sep 2010
Fan#: 78699
Location: Kansas city, MO
What I Drive: 2007 ZX3 SE

Posts: 2,379
Points 11,745, Level 71
Points: 11,745, Level: 71 Points: 11,745, Level: 71 Points: 11,745, Level: 71
Level Up 24% Completed
Level up: 24% Level up: 24% Level up: 24%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 12 BowerR64 Great Standing Member
Buy-Sell-Trade Rating: (2)
Quote:
Originally Posted by sailor View Post
When mine were intermittently malfunctioning (bad vacuum hose) the effect I noticed was a definite loss of power at very low throttle openings.

Red_Sonja - to relate this to your Escape question, I might guess that when used in that larger vehicle the engine isn't operating in that same range often (if at all). Combine a larger vehicle with an automatic transmission & I doubt it spends much time in the low rpm range I often use with a manual trans in a Focus. Automatic would let it rev higher to get similar acceleration in the heavier vehicle.
My car ran very bad since the day i got it shifting way early ad as often as it could i hated it. Sure it helped fuel economy but it had little to no power ever.

Finally Tom tweaked the transmission and now its better then its ever been. The weird part is my fuel economy got better. All the mods i did i think change the power curve of my engine and the shift points of the stock transmission reduced my economy and power. Once Tom moved the shift points now it seems to be shifting more in its power curve and it helped everything.
__________________
It's not important to win, it's important to make the other guy lose.
BowerR64 is offline  
    Reply With Quote Quick reply to this message
Old 10-22-2014, 07:37 AM   #37
felixthecat
w/ my magic bag
 
felixthecat's Avatar
 
Join Date: Nov 2010
Fan#: 80663
Location: Renton, WA
What I Drive: '05 Silver Sport Technologies

Posts: 10,070
Points 11,251, Level 70
Points: 11,251, Level: 70 Points: 11,251, Level: 70 Points: 11,251, Level: 70
Level Up 1% Completed
Level up: 1% Level up: 1% Level up: 1%
Forum Activity 95%
Activity: 95% Activity: 95% Activity: 95%
FF Reputation: 60 felixthecat Excellent Standing Member
Buy-Sell-Trade Rating: (0)
It helps to have the shifts right to begin with. Comparing a mtx to atx w/ intake mods your going to have different results.
__________________
Introduce Mr. Torsen to the mixBigger brakes then you- D23 crew- D-Tech- Sedan Revolution= #131
felixthecat is online now  
    Reply With Quote Quick reply to this message
Old 10-22-2014, 09:13 AM   #38
BowerR64
Focus Fanatic
 
BowerR64's Avatar
 
Join Date: Sep 2010
Fan#: 78699
Location: Kansas city, MO
What I Drive: 2007 ZX3 SE

Posts: 2,379
Points 11,745, Level 71
Points: 11,745, Level: 71 Points: 11,745, Level: 71 Points: 11,745, Level: 71
Level Up 24% Completed
Level up: 24% Level up: 24% Level up: 24%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 12 BowerR64 Great Standing Member
Buy-Sell-Trade Rating: (2)
Well they were when it was stock but i slowly upgraded everything and the last few tunes were with the transmission and that IMO made the biggest gain so far.
__________________
It's not important to win, it's important to make the other guy lose.
BowerR64 is offline  
    Reply With Quote Quick reply to this message
Old 10-22-2014, 10:39 AM   #39
felixthecat
w/ my magic bag
 
felixthecat's Avatar
 
Join Date: Nov 2010
Fan#: 80663
Location: Renton, WA
What I Drive: '05 Silver Sport Technologies

Posts: 10,070
Points 11,251, Level 70
Points: 11,251, Level: 70 Points: 11,251, Level: 70 Points: 11,251, Level: 70
Level Up 1% Completed
Level up: 1% Level up: 1% Level up: 1%
Forum Activity 95%
Activity: 95% Activity: 95% Activity: 95%
FF Reputation: 60 felixthecat Excellent Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by BowerR64 View Post
Well they were when it was stock but i slowly upgraded everything and the last few tunes were with the transmission and that IMO made the biggest gain so far.
Yea, it does help to have the shifts sorted out 1st.
__________________
Introduce Mr. Torsen to the mixBigger brakes then you- D23 crew- D-Tech- Sedan Revolution= #131
felixthecat is online now  
    Reply With Quote Quick reply to this message
Old 10-22-2014, 01:21 PM   #40
Red_Sonja
Focus Enthusiast
 
Red_Sonja's Avatar
 
Join Date: Feb 2008
Fan#: 53953
Location: Redding, CA
What I Drive: 2006 ZX4 ST, RIP, Infra-Red ZX3 SVT

Posts: 83
Points 958, Level 16
Points: 958, Level: 16 Points: 958, Level: 16 Points: 958, Level: 16
Level Up 58% Completed
Level up: 58% Level up: 58% Level up: 58%
Forum Activity 3%
Activity: 3% Activity: 3% Activity: 3%
FF Reputation: 1 Red_Sonja Good Standing Member
Buy-Sell-Trade Rating: (4)
So does all this mean that the Cosworth IM with no imrc circuit and just short (high speed) runners will make very poor power below say 5000rpm? I was looking for a set but not if they are for basically race mode only.
Red_Sonja is offline  
    Reply With Quote Quick reply to this message
Reply

Bookmarks & Social Networks

Tags
design , duratec , identify , intake manifold , specs

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Focus Forum, Ford Focus ST Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 08:19 PM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : 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 Cadillac ATS-V, Ford Fusion and Acura TLX. 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.