look what im getting - Page 2 - Ranger-Forums - The Ultimate Ford Ranger Resource


General Ford Ranger Discussion General discussion of the Ford Ranger that does not fit in any other sub-forum.

Reply
 
LinkBack Thread Tools Search this Thread
  #26  
Old 12-31-2009
94 2.3's Avatar
Member
Thread Starter
 
Join Date: Feb 2008
Location: Washington
Posts: 441
so i shouldnt remove my cat?
Reply With Quote
  #27  
Old 12-31-2009
HarryTasker's Avatar
Member
 
Join Date: Jan 2005
Location: Portland, OR
Posts: 1,491
No, do not remove your cat.
Reply With Quote
  #28  
Old 12-31-2009
whippersnapper02's Avatar
RF Veteran
iTrader: (1)
 
Join Date: Sep 2006
Location: Earth, Milky Way Galaxy
Posts: 7,415
Keep your cat on. Just drive your truck from A to B. If you want something fast then buy something fast.
Reply With Quote
  #29  
Old 12-31-2009
Jp7's Avatar
Jp7 Jp7 is offline
Member
iTrader: (9)
 
Join Date: Sep 2007
Location: My LED lab or on the dyno
Posts: 2,970
Quote:
Originally Posted by 94 2.3 View Post
so i shouldnt remove my cat?
Would I take the back off of my TV set and just start rewiring things? Why?; because I don't understand how it works.

This is the same reason why you shouldn't be modifying your truck.
Reply With Quote
  #30  
Old 12-31-2009
94 2.3's Avatar
Member
Thread Starter
 
Join Date: Feb 2008
Location: Washington
Posts: 441
well i've been told by and exhaust place that removing the cat wont do anything bad but make my truck louder and since i live in an area where there are no emissions i would be ok there but it's not a for sure thing and putting an intake on my truck wont do any harm
Reply With Quote
  #31  
Old 12-31-2009
Jp7's Avatar
Jp7 Jp7 is offline
Member
iTrader: (9)
 
Join Date: Sep 2007
Location: My LED lab or on the dyno
Posts: 2,970
Quote:
Originally Posted by 94 2.3 View Post
well i've been told by and exhaust place that removing the cat wont do anything bad but make my truck louder and since i live in an area where there are no emissions i would be ok there but it's not a for sure thing and putting an intake on my truck wont do any harm
Well the guy at the exhaust place wasn't too smart. They can be fined thousands of dollars for that. The catalyst is designed so that the exhaust can move fast without excessive backpressure. Removing it slows down the exhaust stream, which is bad.
Reply With Quote
  #32  
Old 12-31-2009
whippersnapper02's Avatar
RF Veteran
iTrader: (1)
 
Join Date: Sep 2006
Location: Earth, Milky Way Galaxy
Posts: 7,415
Removing a cat decreases backpressure. Backpressure is what promotes exhaust scavenging at low RPM. Exhaust scavenging is when the the exhaust pulse of another cylinder literally sucks the exhaust gasses out of any other cylinders when their exhaust valves are open. You take away that backpressure and you lose that low end scavenging. On turbo cars the turbo creates enough backpressure. So sure you truck will sound louder and crappier but you will lose low end power.
Reply With Quote
  #33  
Old 12-31-2009
94 2.3's Avatar
Member
Thread Starter
 
Join Date: Feb 2008
Location: Washington
Posts: 441
oh ok thanks for the info guys i wont be doing that then lol
Reply With Quote
  #34  
Old 12-31-2009
Jp7's Avatar
Jp7 Jp7 is offline
Member
iTrader: (9)
 
Join Date: Sep 2007
Location: My LED lab or on the dyno
Posts: 2,970
Quote:
Originally Posted by whippersnapper02 View Post
Removing a cat decreases backpressure. Backpressure is what promotes exhaust scavenging at low RPM. Exhaust scavenging is when the the exhaust pulse of another cylinder literally sucks the exhaust gasses out of any other cylinders when their exhaust valves are open. You take away that backpressure and you lose that low end scavenging. On turbo cars the turbo creates enough backpressure. So sure you truck will sound louder and crappier but you will lose low end power.
Backpressure = bad in all cases
Slow moving exhaust = poor scavenging
Smaller diameter exhaust = fast exhaust w/ some backpressure
So backpressure is necessary to keep the exhaust fast.

If you could have fast moving exhaust w/o backpressure it would be best.
Reply With Quote
  #35  
Old 12-31-2009
Member
 
Join Date: May 2009
Location: Sacramento, Ca
Posts: 68
man you do what you want with your truck. its not worth it to remove your cat all your gonna get is a loud exhaust and a check engine light. you do what you want with it. hey yall know what year they put mazda's 2.3 4 banger in the rangers?
Reply With Quote
  #36  
Old 12-31-2009
Jp7's Avatar
Jp7 Jp7 is offline
Member
iTrader: (9)
 
Join Date: Sep 2007
Location: My LED lab or on the dyno
Posts: 2,970
Quote:
Originally Posted by kingwoodranger View Post
man you do what you want with your truck. its not worth it to remove your cat all your gonna get is a loud exhaust and a check engine light. you do what you want with it. hey yall know what year they put mazda's 2.3 4 banger in the rangers?
2001?
Reply With Quote
  #37  
Old 12-31-2009
TheStig88's Avatar
Member
iTrader: (4)
 
Join Date: Aug 2008
Location: Columbia, Missouri
Posts: 2,120
Quote:
Originally Posted by kingwoodranger View Post
hey yall know what year they put mazda's 2.3 4 banger in the rangers?
late 01'
Reply With Quote
  #38  
Old 12-31-2009
whippersnapper02's Avatar
RF Veteran
iTrader: (1)
 
Join Date: Sep 2006
Location: Earth, Milky Way Galaxy
Posts: 7,415
Quote:
Originally Posted by Jp7 View Post
Backpressure = bad in all cases
Slow moving exhaust = poor scavenging
Smaller diameter exhaust = fast exhaust w/ some backpressure
So backpressure is necessary to keep the exhaust fast.

If you could have fast moving exhaust w/o backpressure it would be best.
So some backpressure is still good. The best thing to do is to run long tube equal length headers on a MA engine but you can't for smog reasons. Screw smog until 2016 because I'm throwing on some Doug Thorley long tubes on my Taco. HAHA.
Reply With Quote
  #39  
Old 12-31-2009
Jp7's Avatar
Jp7 Jp7 is offline
Member
iTrader: (9)
 
Join Date: Sep 2007
Location: My LED lab or on the dyno
Posts: 2,970
Quote:
Originally Posted by whippersnapper02 View Post
The best thing to do is to run long tube equal length headers on a MA engine but you can't for smog reasons. Screw smog until 2016 because I'm throwing on some Doug Thorley long tubes on my Taco. HAHA.
What happens in 2016 - how would they know without actually looking? Or are you just trying to keep your warranty?

Manifolds are kept short to keep the exhaust as hot as possible.
Reply With Quote
  #40  
Old 12-31-2009
whippersnapper02's Avatar
RF Veteran
iTrader: (1)
 
Join Date: Sep 2006
Location: Earth, Milky Way Galaxy
Posts: 7,415
Quote:
Originally Posted by Jp7 View Post
What happens in 2016 - how would they know without actually looking? Or are you just trying to keep your warranty?

Manifolds are kept short to keep the exhaust as hot as possible.
2016 is when I would have to smog my truck.

Short manifolds don't always work. Long tubes on my friend's 06 GTO will make a significant power increase over the shortys. Maybe in a turbo setup a short equal length manifold will work but not on a NA engine.

Last edited by whippersnapper02; 12-31-2009 at 04:51 PM.
Reply With Quote
  #41  
Old 12-31-2009
Jp7's Avatar
Jp7 Jp7 is offline
Member
iTrader: (9)
 
Join Date: Sep 2007
Location: My LED lab or on the dyno
Posts: 2,970
Quote:
Originally Posted by whippersnapper02 View Post
2016 is when I would have to smog my truck.

Short manifolds don't always work. Long tubes on my friend's 06 GTO will make a significant power increase over the shortys. Maybe in a turbo setup a short equal length manifold will work but not on a NA engine.
You didn't smell what I was cooking..

OEMs keep them short so the stream is hot when it gets to the catalyst.

Will they actually look for modified runners under your hood? It should not do much to your mixture.
Reply With Quote
  #42  
Old 12-31-2009
94 2.3's Avatar
Member
Thread Starter
 
Join Date: Feb 2008
Location: Washington
Posts: 441
well i have obd1 on my truck so i wouldnt have a problem there but if it's not good for my truck i dont wanna do it
Reply With Quote
  #43  
Old 12-31-2009
whippersnapper02's Avatar
RF Veteran
iTrader: (1)
 
Join Date: Sep 2006
Location: Earth, Milky Way Galaxy
Posts: 7,415
Well with this particular setup it removes the pre cats from the stock y pipe so it will set off a cel. No worries though since URD makes a plug and play O2 simulator for my truck. They also make shorty headers but you have to cut the stock pre cat off and weld them on to the new manifold. I have read that the gain is not enough to justify the extra work. I figure when I smog I'll swap in the stock manifolds.
Reply With Quote
  #44  
Old 12-31-2009
Jp7's Avatar
Jp7 Jp7 is offline
Member
iTrader: (9)
 
Join Date: Sep 2007
Location: My LED lab or on the dyno
Posts: 2,970
Quote:
Originally Posted by whippersnapper02 View Post
Well with this particular setup it removes the pre cats from the stock y pipe so it will set off a cel. No worries though since URD makes a plug and play O2 simulator for my truck. They also make shorty headers but you have to cut the stock pre cat off and weld them on to the new manifold. I have read that the gain is not enough to justify the extra work. I figure when I smog I'll swap in the stock manifolds.
The first catalysts like that on the y-pipe do most of the work, because it is hottest. I prefer the mechanical o2 spacers over electrical simulators.
Reply With Quote
  #45  
Old 01-01-2010
Coleosis85's Avatar
Member
 
Join Date: Aug 2009
Location: OKC, Ok
Posts: 439
Quote:
Originally Posted by 94 2.3 View Post
so i shouldnt remove my cat?
It is technically illegal..felony to be exact...If you are in a state like mine that doesnt have emissions checks...then you probably wont get hassled. Its pretty ****ed up that the people in this thread have just been d!cks to you. When I removed the cats on my civic, maxima, 3.0 ranger, 4.0 ranger, and blazer they all ran just fine if not a lil better. You do what you want to your truck...Its a great vehicle to learn on. Not like you're driving a 40,000 car....if you mess something up, its not too expensive to fix.

Im sure you know without all these people telling you that you dont have a race car...But if you wanna chop some stuff up to see what works for you and what doesnt, then by all means, do it...Just be safe and have fun!

Quote:
Originally Posted by Jp7 View Post
This is the same reason why you shouldn't be modifying your truck.
Really? Just because you know more than someone else, doesnt mean you have to be a douche. Is it really that hard to get a point/opinion across without insults?
Reply With Quote
  #46  
Old 01-01-2010
Jp7's Avatar
Jp7 Jp7 is offline
Member
iTrader: (9)
 
Join Date: Sep 2007
Location: My LED lab or on the dyno
Posts: 2,970
Quote:
Originally Posted by Coleosis85 View Post
Is it really that hard to get a point/opinion across without insults?
What's insulting is that nobody uses the search button.
Reply With Quote
  #47  
Old 01-01-2010
94 2.3's Avatar
Member
Thread Starter
 
Join Date: Feb 2008
Location: Washington
Posts: 441
Quote:
Originally Posted by Jp7 View Post
What's insulting is that nobody uses the search button.
no what's insulting is you guys bashing me about what i want to do to my truck
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Turbo on 3.0 ranger??? LOOK LOOK!!!! Matt162b 2.9L & 3.0L V6 Tech 14 11-14-2010 01:00 PM
Look Look! The mailman just came!! Seb_L Suspension Tech 17 03-16-2010 11:57 PM
look look look ... bruiser General Ford Ranger Discussion 7 11-27-2007 04:37 PM
Look what I am going to look at! HAZZARDJOHN General Ford Ranger Discussion 37 07-17-2006 04:24 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 07:43 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.