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  #1  
Old 05-22-2011, 02:05 PM
90fordranger 90fordranger is offline
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Question take the cat off?

If I take the cat off of my truck and just run my flowmaster, will that effect anything? Such as power, mpg, or whatever the o2 censors are?

Just wondering

thanks a lot.
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90 ranger 2.9 v6, 5 speed
regular cab long box 2wd.
feature mods-
short ram intake, dynomax exhaust, homade bull guard here soon, 2" body lift 4" suspension lift, 33 bfg all terains.
selling the truck this summer and buying a new ranger hopefully.
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  #2  
Old 05-22-2011, 02:11 PM
STL STL is offline
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Default Re: take the cat off?

It will effect the MPG
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Old 05-22-2011, 02:14 PM
90fordranger 90fordranger is offline
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Default Re: take the cat off?

Quote:
Originally Posted by STL View Post
It will effect the MPG
Thanks,
About how bad? Right now I get between 18 and 22. I'm sure you cant make a very accurate guess, but just a guess would be helpful thanks again.
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90 ranger 2.9 v6, 5 speed
regular cab long box 2wd.
feature mods-
short ram intake, dynomax exhaust, homade bull guard here soon, 2" body lift 4" suspension lift, 33 bfg all terains.
selling the truck this summer and buying a new ranger hopefully.
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  #4  
Old 05-22-2011, 02:17 PM
STL STL is offline
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Default Re: take the cat off?

Like you said it would be hard to guess. I would say it would be very noticeable.
Guy I know did it to his 97 Ranger and it cut it down a lot he put a new one on.
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Old 05-22-2011, 02:21 PM
90fordranger 90fordranger is offline
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Default Re: take the cat off?

Quote:
Originally Posted by STL View Post
Like you said it would be hard to guess. I would say it would be very noticeable.
Guy I know did it to his 97 Ranger and it cut it down a lot he put a new one on.
Alright, Just to think how much gas prices are here, I don't think I will do it. Thanks again.
__________________
90 ranger 2.9 v6, 5 speed
regular cab long box 2wd.
feature mods-
short ram intake, dynomax exhaust, homade bull guard here soon, 2" body lift 4" suspension lift, 33 bfg all terains.
selling the truck this summer and buying a new ranger hopefully.
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  #6  
Old 05-22-2011, 02:32 PM
doyouquaxu doyouquaxu is offline
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Default Re: take the cat off?

last i checked, it was a federal offense to remove the cat on any vehicle that is registered for street driving, regardless of the state you live in and their emissions standards
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  #7  
Old 05-22-2011, 06:16 PM
SpitfireEMT SpitfireEMT is offline
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Default Re: take the cat off?

If you want a little better flow, replace with new high flow cats. Couldn't hurt.
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Old 05-22-2011, 07:21 PM
90fordranger 90fordranger is offline
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Default Re: take the cat off?

Quote:
Originally Posted by doyouquaxu View Post
last i checked, it was a federal offense to remove the cat on any vehicle that is registered for street driving, regardless of the state you live in and their emissions standards
oh well. What if a vehicle doesn't even have a cat on it? That can't be a federal offence. But I don't really care if it is or not, I may do it an I may not. But its good to know I guess.

----------

Quote:
Originally Posted by SpitfireEMT View Post
If you want a little better flow, replace with new high flow cats. Couldn't hurt.

alright thanks, I'll look them up. I just want a better sound, My flomaster just doesn't give my truck a decent sound. My friend took his cat off then put the flow on, and his truck sounds really good.
__________________
90 ranger 2.9 v6, 5 speed
regular cab long box 2wd.
feature mods-
short ram intake, dynomax exhaust, homade bull guard here soon, 2" body lift 4" suspension lift, 33 bfg all terains.
selling the truck this summer and buying a new ranger hopefully.
Reply With Quote
  #9  
Old 05-22-2011, 07:27 PM
doyouquaxu doyouquaxu is offline
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Default Re: take the cat off?

Quote:
Originally Posted by 90fordranger View Post
oh well. What if a vehicle doesn't even have a cat on it? That can't be a federal offence. But I don't really care if it is or not, I may do it an I may not. But its good to know I guess.
if its equipped from factory with one or more, it needs that same number of cats to be legal on the street.

cats these days are 'high flow' like the aftermarket ones. because the auto manufacturers were trying to get efficiency and better emissions, they did a lot of testing to get them to work as best as possible. sometimes, your truck will even be less efficient or powerful since the motor was designed and tuned to work with the cats
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  #10  
Old 05-22-2011, 07:31 PM
90fordranger 90fordranger is offline
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Default Re: take the cat off?

Quote:
Originally Posted by doyouquaxu View Post
if its equipped from factory with one or more, it needs that same number of cats to be legal on the street.

cats these days are 'high flow' like the aftermarket ones. because the auto manufacturers were trying to get efficiency and better emissions, they did a lot of testing to get them to work as best as possible. sometimes, your truck will even be less efficient or powerful since the motor was designed and tuned to work with the cats
okay, well thanks. I really don't want to take it off, If it affects my truck that much. mpg is sorta okay, But less power would begin to annoy me.
__________________
90 ranger 2.9 v6, 5 speed
regular cab long box 2wd.
feature mods-
short ram intake, dynomax exhaust, homade bull guard here soon, 2" body lift 4" suspension lift, 33 bfg all terains.
selling the truck this summer and buying a new ranger hopefully.
Reply With Quote
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