Home Discussion Forum Tech Articles Other Articles Featured Rides Readers Rides Classifieds Shirts & Decals Parts Store

Ford Ranger Discussion Forum

Off-Road Truck Of The Month

'Rowdy Fitzgerald'
August 2014 OTOTM

Mini Truck Of The Month

'Flit-e' Dave'
August 2014 MTOTM
 

Go Back   The Ranger Station Forums > Engine & Transmission Forums > Exhaust

Reply
 
Thread Tools Display Modes
Old 03-16-2010, 06:51 PM   #1
mwood1985
Member
 
mwood1985's Avatar
 
Join Date: Mar 2008
Location: Marietta GA
Posts: 811
Vehicle Year: 2001
Vehicle Make: Ford
Vehicle Model: Ranger XLT Offroad 2001- t bar crank 33s body lift explorer spring swap
I use this vehicle for: daily driver light trail/mud riding
Rep Power: 15
mwood1985 will become famous soon enough
Send a message via AIM to mwood1985
Default effects of high flow converters on engine performance

how would removing the two main cats and replacing them with a magnaflow high flow on a 2001 4.0 affect the 02 sensors and engine performance? the final sensor is bettween the two main cats. i'd like to remove them to do a custom exhaust for better sound and performance while using a high flow to keep it legal and a flowmaster 40 with dual exits.
__________________
Theres just enough room in a Ranger for us, the girls, the dog and a case of Bud Light....
http://www.myspace.com/littlesoldierboy
http://www.facebook.com/?ref=home#!/mwooditch
let me know your TRS if you add me
mwood1985 is offline   Reply With Quote
Forum Notices (Not shown to 'Premium Members')

 Reminder:

 We're looking for participants to help move our banner from Alaska to Florida: Click HERE.

 Click HERE to see the banner map.

 Want to become a Premium Member & not see these notices? Click HERE.

Want your truck considered for Truck Of The Month? Click HERE.

Don't forget to vote!

Old 03-16-2010, 09:10 PM   #2
triumphrider-1
Member
 
triumphrider-1's Avatar
 
Join Date: Nov 2007
Location: Port Huron, MI
Posts: 2,028
Vehicle Year: 1999
Vehicle Make: Ford
Vehicle Model: Ranger XLT
I use this vehicle for: Pondering
Rep Power: 21
triumphrider-1 is a jewel in the roughtriumphrider-1 is a jewel in the roughtriumphrider-1 is a jewel in the roughtriumphrider-1 is a jewel in the rough
Default

My assumption would be that it will lower low end power, but gain power higher in the rpm. Without dyno numbers comparing before and after though, I am not positive.
__________________
1999 Ranger XLT 4x4
Supercab four door
3.0L flex fuel, automatic transmission

"Minds are like parachutes, they only function when open" - Anna Pavlova
triumphrider-1 is offline   Reply With Quote
Old 03-17-2010, 12:22 AM   #3
mwood1985
Member
 
mwood1985's Avatar
 
Join Date: Mar 2008
Location: Marietta GA
Posts: 811
Vehicle Year: 2001
Vehicle Make: Ford
Vehicle Model: Ranger XLT Offroad 2001- t bar crank 33s body lift explorer spring swap
I use this vehicle for: daily driver light trail/mud riding
Rep Power: 15
mwood1985 will become famous soon enough
Send a message via AIM to mwood1985
Default

i know it will do that im more talking about it making the computer change the fuel mixture and timing an causing the moter to run badly
__________________
Theres just enough room in a Ranger for us, the girls, the dog and a case of Bud Light....
http://www.myspace.com/littlesoldierboy
http://www.facebook.com/?ref=home#!/mwooditch
let me know your TRS if you add me
mwood1985 is offline   Reply With Quote
Old 03-17-2010, 11:02 AM   #4
triumphrider-1
Member
 
triumphrider-1's Avatar
 
Join Date: Nov 2007
Location: Port Huron, MI
Posts: 2,028
Vehicle Year: 1999
Vehicle Make: Ford
Vehicle Model: Ranger XLT
I use this vehicle for: Pondering
Rep Power: 21
triumphrider-1 is a jewel in the roughtriumphrider-1 is a jewel in the roughtriumphrider-1 is a jewel in the roughtriumphrider-1 is a jewel in the rough
Default

It shouldn't run poorly, and I am not sure if running a high-flow would throw a CEL or not.
__________________
1999 Ranger XLT 4x4
Supercab four door
3.0L flex fuel, automatic transmission

"Minds are like parachutes, they only function when open" - Anna Pavlova
triumphrider-1 is offline   Reply With Quote
Old 03-18-2010, 01:40 AM   #5
chazzone
Premium Member
 
Join Date: Feb 2008
Location: Camby, IN
Posts: 393
Vehicle Year: 1989
Vehicle Make: Ford
Vehicle Model: Broncco II
I use this vehicle for: Everything
Rep Power: 14
chazzone will become famous soon enough
Default

Catalytic converters seldom ever effect performance, especially on normal street engines. If you had a built/stroked v-8, you'd see a difference, but not with a stock 4.0

So, as long as you keep to the same size pipe, it shouldn't effect your performance at all.

Better flowing mufflers however, will make a difference, since stock mufflers can be restrictive, and a good performance muffler can increase flow.

Keep the O2 sensors in the stock location. One in front of the new cat, and one behind. The computer compares the signal to make sure the first cat is doing its job correctly, and if you take one out of the system, then it'll throw a code.
__________________
'89 EB BroncoII, 2" body/3" suspension lift by Duff. D35 front/8.8 rear swap, Camcraft cam, Pacesetter headers, 4.0 radiator,P235 75 15 Michellin LTX
chazzone is offline   Reply With Quote
Old 03-18-2010, 10:51 AM   #6
mwood1985
Member
 
mwood1985's Avatar
 
Join Date: Mar 2008
Location: Marietta GA
Posts: 811
Vehicle Year: 2001
Vehicle Make: Ford
Vehicle Model: Ranger XLT Offroad 2001- t bar crank 33s body lift explorer spring swap
I use this vehicle for: daily driver light trail/mud riding
Rep Power: 15
mwood1985 will become famous soon enough
Send a message via AIM to mwood1985
Default

ive got a cat BEHIND the last o2 sensor if i delete that one and leave the first is it gonna pop codes?
__________________
Theres just enough room in a Ranger for us, the girls, the dog and a case of Bud Light....
http://www.myspace.com/littlesoldierboy
http://www.facebook.com/?ref=home#!/mwooditch
let me know your TRS if you add me
mwood1985 is offline   Reply With Quote
Old 03-20-2010, 09:28 PM   #7
meatheaded nucklebuster
Member
 
meatheaded nucklebuster's Avatar
 
Join Date: Mar 2009
Location: Elk River MN/ University of MN Duluth
Posts: 174
Vehicle Year: 1989
Vehicle Make: Ford
Vehicle Model: Ranger
I use this vehicle for: Everything it works for
Rep Power: 11
meatheaded nucklebuster is on a distinguished road
Default

as long as there is not an o2 behind it you can take it out but I doubt that is the case because all obd 2 vehicles have downstream o2 sensors to measure catalytic efficiency. If I were you I would skip the "high flow" cats and spend your money on a good sounding performance muffler that will actually give you a gain. Basically cats are not all that restrictive but even "performance" cats have to perform the function of reacting with unburnt hydrocarbons so that you dont throw a check engine light. So really the only good high flow cat is no cat at all. However, keep in mind that stock cats only are designed for a theoretical life of 100,000 miles before they start to be less reactive and then they will start to cause o2 sensor codes and poor gas mileage so depending on your trucks mileage you might want to replace them anyways. Just dont get suckered into some super expensive "high flow" model.
__________________
It may be silly...but aint it fun

1989 Ranger, 2.9 5-spd, Under going d44 spartan/ d60 welded 4.10s and 36s (Build Thread)
meatheaded nucklebuster is offline   Reply With Quote
Old 03-20-2010, 11:39 PM   #8
chazzone
Premium Member
 
Join Date: Feb 2008
Location: Camby, IN
Posts: 393
Vehicle Year: 1989
Vehicle Make: Ford
Vehicle Model: Broncco II
I use this vehicle for: Everything
Rep Power: 14
chazzone will become famous soon enough
Default

Hi flow cats are cheap, about $65. Cheaper than any stock replacement. It might be a good idea to buy two, and put the 2nd O2 sensor behind the 2nd one, just to make sure it does a good enough job.
__________________
'89 EB BroncoII, 2" body/3" suspension lift by Duff. D35 front/8.8 rear swap, Camcraft cam, Pacesetter headers, 4.0 radiator,P235 75 15 Michellin LTX
chazzone is offline   Reply With Quote
Reply

Bookmarks

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 06:55 AM.




1999-2014 / 959 Media LLC / All Rights Reserved