Comp vs. Crane vs. Crower - Page 2 - 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    
FocusFest Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 08-20-2013, 10:48 PM   #11
felixthecat
Focus Fanatic
 
felixthecat's Avatar
 
Join Date: Nov 2010
Fan#: 80663
Location: Renton, WA
What I Drive: '05 Silver Sport Technologies

Posts: 7,998
FF Reputation: 52 felixthecat Great Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by Magus2727 View Post
^^ yes but springs and retainers can always be swaped out at a later date also with out pulling the head.
True, but you'll have the head off & in your hands on the bench. I'd do it all at the same time. Done & move on to other mods!!!!!!!
__________________
Introduce Mr. Torsen to the mix D23 crew- D-Tech- Sedan Revolution= #131
felixthecat is offline  
    Reply With Quote
Sponsored Links
Advertisement
 
Old 08-21-2013, 02:14 AM   #12
amc49
Focus Fanatic
 
Join Date: Mar 2012
Fan#: 96610
Location: Fort Worth, TX
What I Drive: 00 wagon, 02 sedan both zetec atx

Posts: 4,125
FF Reputation: 23 amc49 Great Standing Member
Buy-Sell-Trade Rating: (0)
FYI the difference of ten degrees or so more exhaust timing in older school motors was to make up for not having headers, true headers let that even up. Factory high flow exhaust manifolds still won't touch true header flow and no sonic wave tuning there either.

Exhaust on engines nowadays is good enough so that you can put more lift on intake than exhaust to bring them more in line with each other. More lift on intake for same reason intake valve is bigger than exhaust. Intake drawn in by pressure drop while exhaust aided by literally exploding out ike dynamite in first milliseconds of valve opening.

Maybe that'll help with asymmetrical or symmetrical cam timing ideas.
amc49 is online now  
    Reply With Quote
Old 08-21-2013, 06:21 AM   #13
Magus2727
Focus Fanatic
 
Magus2727's Avatar
 
Join Date: Feb 2009
Fan#: 62897
Location: Salt Lake City, UT
What I Drive: 2001 Malibu Blue ZX3

Posts: 3,778
FF Reputation: 9 Magus2727 Good Standing Member
Buy-Sell-Trade Rating: (2)
so with headers (I have the SVT header, and likely will have ORP or at the least a high flow cat) its now saying that the intake is more restrictive than the exhaust so it needs to add more lift and more duration?

The cams show to have more lift and more duration on the intake cam then the exhaust cam. I also have a SIR (ice man) and a 65mm TB. So I am guessing my intake is about as restrictive as the exhaust. but I dont have any way to know that as a consumer.

The Cam manufactures should have ran the simulation or flow numbers to know the flow. it looks like Crane and Crower feel like there is flow differences where Comp feels like the intake does flow the same as exhaust thus not having a difference in lift or duration.
__________________
2001 ZX3 2.0L Zetec-
Hatch Nation #42

Going through Rebuild See "The TICK Build Thread" for details (http://www.focusfanatics.com/forum/showthread.php?t=289168&referrerid=62897)
Magus2727 is offline  
    Reply With Quote
Old 09-02-2013, 12:23 PM   #14
mattmoz
Focus Enthusiast
 
Join Date: Feb 2012
Fan#: 94897
Location: toledo, OH
What I Drive: 2000 black zx3

Posts: 234
FF Reputation: 1 mattmoz Good Standing Member
Buy-Sell-Trade Rating: (0)
this ia kinda close in topic but what would be better a zetec head with cams or a svt head on a zetec block with cams ?
mattmoz is offline  
    Reply With Quote
Old 09-02-2013, 01:26 PM   #15
Magus2727
Focus Fanatic
 
Magus2727's Avatar
 
Join Date: Feb 2009
Fan#: 62897
Location: Salt Lake City, UT
What I Drive: 2001 Malibu Blue ZX3

Posts: 3,778
FF Reputation: 9 Magus2727 Good Standing Member
Buy-Sell-Trade Rating: (2)
A ford racing head w/ cams would be best. The svt head you would need to do a VCT delete, there are also fewer options I believe for SVT cams. It sounds like best is to get a zetec head, with some general porting, match the intake runners to the head, and go as big as you can on the cams.
__________________
2001 ZX3 2.0L Zetec-
Hatch Nation #42

Going through Rebuild See "The TICK Build Thread" for details (http://www.focusfanatics.com/forum/showthread.php?t=289168&referrerid=62897)
Magus2727 is offline  
    Reply With Quote
Old 09-02-2013, 02:05 PM   #16
1turbofocus
FF Affiliate
 
1turbofocus's Avatar
 
Join Date: Oct 2003
Fan#: 1123
Location: Belmont, NC
What I Drive: 2000 ZX3 / 2002 SVT Turbocharged

Posts: 21,443
FF Reputation: 153 1turbofocus Excellent Standing Member1turbofocus Excellent Standing Member
Buy-Sell-Trade Rating: (28)
I like the STG2 and STG3 Comp cams and have made some good power with them

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

Customer Support
AIM: hpdyno
Email: hpdyno@aol.com
Phone: 704-249-3745
Site: focus-power.com

Elder 1turbofocus
1turbofocus is offline  
    Reply With Quote
Old 09-02-2013, 02:12 PM   #17
Magus2727
Focus Fanatic
 
Magus2727's Avatar
 
Join Date: Feb 2009
Fan#: 62897
Location: Salt Lake City, UT
What I Drive: 2001 Malibu Blue ZX3

Posts: 3,778
FF Reputation: 9 Magus2727 Good Standing Member
Buy-Sell-Trade Rating: (2)
Tom, would you say you can use the stock valve train with the Comp stg2 and stg3 cams as they advertise it should you upgrade? Also how is the drive ability of the stg3 vs stg2?
__________________
2001 ZX3 2.0L Zetec-
Hatch Nation #42

Going through Rebuild See "The TICK Build Thread" for details (http://www.focusfanatics.com/forum/showthread.php?t=289168&referrerid=62897)
Magus2727 is offline  
    Reply With Quote
Old 09-02-2013, 06:01 PM   #18
iminhell
C2H5OH
 
iminhell's Avatar
 
Join Date: Jun 2006
Fan#: 36222
Location: Darwin, MN
What I Drive: 2000 & 2001 ZX3's

Posts: 10,234
FF Reputation: 48 iminhell Great Standing Member
Buy-Sell-Trade Rating: (4)
Drivability is in the tune and not the cams.
Modern fuel injection has changed many of the old norm about big cams. Yes you'll still get plenty of overlap and backflow. But a good tune can time the injection properly and the car will idle well.
But that's not to say it'll drive like stock. It won't and you shouldn't expect it to.

How many miles are on your springs now?
Do you trust them?
No.
Then upgrade.


Far as any 'tuning' of exhaust or intake; there is no one currently making parts that has tuned any part (intake or exhaust). They are simply parts that are made to fit and nothing more.
Any gains seen or claimed are simply due to increases total flow potential. You're still going to be under 100%VE; which proves there is no tuning done.

And don't bother reading books about intake or exhaust tuning. They are wrong and/or don't apply to your Focus (4cylinder). The harmonics are completely different which means it takes different tuning too.

Another thing to keep in mind is that tuning exhaust only applies to a very narrow gas temperature range ... the speed of sound changes with heat, which means the tuned length also has to change.
Simply put, don't waste time/money/hair on trying to tune your Focus's intake/exhaust.
iminhell is online now  
    Reply With Quote
Old 09-02-2013, 09:12 PM   #19
Magus2727
Focus Fanatic
 
Magus2727's Avatar
 
Join Date: Feb 2009
Fan#: 62897
Location: Salt Lake City, UT
What I Drive: 2001 Malibu Blue ZX3

Posts: 3,778
FF Reputation: 9 Magus2727 Good Standing Member
Buy-Sell-Trade Rating: (2)
about 150k miles on car. to my knowledge the previous owner did not change anything out in regards to the head or the valve train. There is nothing that is leading me to question my valves. Other than taking it to higher RPM's.

I will likely go with the Comp Stage 3 cams. They do not have near the lift as Crower or Crane. so under normal driving I feel fine. the question is when I take it close to red line or higher in RPMS since the cams are designed to go to 7,400. Am I going to get valve float at that high of an RPM? Comp advertises that you can use the stock valve train. So I am not that concerned.

Also with my car and being non interference if I get valve float it should not cause any damage, just drop in power right.

I figured trying to tune anything would be pointless. I guess that's where the dual runner on the SVT plays a roll in right? changing the length of the runner "tuning" the intake for different RPM / flow ranges.

I plan on having Tom do the tuning once I get it running again. also taken to a dyno to dial in the cams though the gears I need to get.

I am just wanting to make sure I do it right. while in a perfect world I will have the disposable income right away to get the springs and the cams. but if the cams advertise to use stock valve train why spend the $200+ on the springs when I can spend it on other bits.
__________________
2001 ZX3 2.0L Zetec-
Hatch Nation #42

Going through Rebuild See "The TICK Build Thread" for details (http://www.focusfanatics.com/forum/showthread.php?t=289168&referrerid=62897)
Magus2727 is offline  
    Reply With Quote
Old 09-02-2013, 10:19 PM   #20
1turbofocus
FF Affiliate
 
1turbofocus's Avatar
 
Join Date: Oct 2003
Fan#: 1123
Location: Belmont, NC
What I Drive: 2000 ZX3 / 2002 SVT Turbocharged

Posts: 21,443
FF Reputation: 153 1turbofocus Excellent Standing Member1turbofocus Excellent Standing Member
Buy-Sell-Trade Rating: (28)
Spend the money and get the springs

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

Customer Support
AIM: hpdyno
Email: hpdyno@aol.com
Phone: 704-249-3745
Site: focus-power.com

Elder 1turbofocus
1turbofocus is offline  
    Reply With Quote
Reply

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 02:55 AM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information : Site Map

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.