Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

Cats=torque ???

Thread Tools
 
Search this Thread
 
Old 08-21-2009, 05:44 PM
  #1  
TECH Senior Member
Thread Starter
iTrader: (1)
 
NHRAMAN's Avatar
 
Join Date: Apr 2005
Location: Vancouver,[KITSILANO].B.C. Canada *WestCoast*
Posts: 8,810
Likes: 0
Received 0 Likes on 0 Posts
Question Cats=torque ???

Put my MAGNAFLOW cats on the other day for EMMISIONS ....is it me, or did I gain some/a bunch of Torque......
Old 08-21-2009, 07:01 PM
  #2  
TECH Senior Member
Thread Starter
iTrader: (1)
 
NHRAMAN's Avatar
 
Join Date: Apr 2005
Location: Vancouver,[KITSILANO].B.C. Canada *WestCoast*
Posts: 8,810
Likes: 0
Received 0 Likes on 0 Posts
Default

Has no one Dynoed before and after cats/no cats.?????
Old 08-21-2009, 07:19 PM
  #3  
TECH Senior Member
iTrader: (26)
 
kinglt-1's Avatar
 
Join Date: Jul 2005
Location: Ft. Wayne, IN
Posts: 5,794
Received 196 Likes on 138 Posts

Default

Na you just lost topend wich made the low end feel better.
Old 08-21-2009, 08:33 PM
  #4  
TECH Junkie
iTrader: (4)
 
Soul TKR's Avatar
 
Join Date: Jun 2004
Location: San Diego, CA
Posts: 3,543
Likes: 0
Received 1 Like on 1 Post

Default

when you put high flow cats on the car, will that get rid of the rich fuel smell? I smell like gasoline everytime I get out of my car

it's starting to get old...

wonder how much power you lose...
Old 08-21-2009, 08:56 PM
  #5  
On The Tree
iTrader: (2)
 
jdroelle001's Avatar
 
Join Date: Mar 2006
Location: Cleveland/Toledo OH
Posts: 136
Likes: 0
Received 0 Likes on 0 Posts
Default

High flow cats will help some with the gasoline smell. I love the smell of a car with no cats. However I just got my duals on and with the hiflow cats it still smells as strong as my single exhaust did with no cat
Old 08-21-2009, 09:15 PM
  #6  
TECH Addict
iTrader: (2)
 
crainholio's Avatar
 
Join Date: Aug 2003
Posts: 2,977
Likes: 0
Received 3 Likes on 3 Posts

Default

You probably picked up some low-end and midrange power output.

Running too little exhaust restriction for a given airflow causes a portion of the incoming fuel/air charge to be discharged into the exhaust during valve overlap. This is fact.

As stated by another poster, you probably gave up some top-end power. Depending on how you use the car, it may be a good compromise.

Most engines (except dedicated drag racers) spend very little of their time in the high RPM range, so why not optimize your engine's efficiency for where you use it?
Old 08-22-2009, 09:21 AM
  #7  
Launching!
 
2002SS#1811's Avatar
 
Join Date: Mar 2004
Location: SUGAR GROVE TOWNSHIP ILLINOIS
Posts: 266
Likes: 0
Received 0 Likes on 0 Posts

Default

:secr et2:
Originally Posted by Soul TKR
when you put high flow cats on the car, will that get rid of the rich fuel smell? I smell like gasoline everytime I get out of my car

it's starting to get old...

wonder how much power you lose...
Yes. At least in my case it did. Got rid of the duals and went with the set up in the sig, lost less than 5 hp and TQ. Lot less fumes and the car actually runs better. Dyno tuned each time. Car is still a beast and the only way I could tell anything was lost was on the dyno sheet printout, driving it is very hard to notice...
Old 08-23-2009, 06:09 PM
  #8  
TECH Senior Member
Thread Starter
iTrader: (1)
 
NHRAMAN's Avatar
 
Join Date: Apr 2005
Location: Vancouver,[KITSILANO].B.C. Canada *WestCoast*
Posts: 8,810
Likes: 0
Received 0 Likes on 0 Posts
Thumbs up

Originally Posted by crainholio
You probably picked up some low-end and midrange power output.

Running too little exhaust restriction for a given airflow causes a portion of the incoming fuel/air charge to be discharged into the exhaust during valve overlap. This is fact.

As stated by another poster, you probably gave up some top-end power. Depending on how you use the car, it may be a good compromise.

Most engines (except dedicated drag racers) spend very little of their time in the high RPM range, so why not optimize your engine's efficiency for where you use it?
That is what I thought.....thanx to all...




All times are GMT -5. The time now is 09:55 PM.