high flow cat question

batman smd

New Member
i have a 2000 gsr..i bought a dc sprt header and high flow cat...i know the first 02 sensor reads the exhaust going in and the second checks the cat...if the cat is straight threw is the rear sensor going to throw a code because the cat is no longer filtering the exhaust...if so is there something i can do with the back sensor to keep from having a check engine light or performance issues...thanks
 

Aussie

Zoom-Zoom
Umm...The cat still filters the exhaust, that's the whole purpose of the cat. Just because it's a high flow doesn't mean it doesn't do what it's intended to do.
 

dc2GS-R

Super Moderator
It depends on the cat. Some cheap, crappy (EBAY) high flow cats will not function well enough and will cause the o2 sensor to throw a code. If it is a decent brand cat (carsound, random technology...etc.) then there won't be a problem.

There is ways to keep it off though. O2 simulators or just by using spark plug adaptors to back the o2 sensor out of the middle of the exhaust stream to keep the readings down.
 

bmxicansd

New Member
dc2GS-R said:
It depends on the cat. Some cheap, crappy (EBAY) high flow cats will not function well enough and will cause the o2 sensor to throw a code. If it is a decent brand cat (carsound, random technology...etc.) then there won't be a problem.

There is ways to keep it off though. O2 simulators or just by using spark plug adaptors to back the o2 sensor out of the middle of the exhaust stream to keep the readings down.
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carsound and random tech have a good reputation.. Beware of ebay cats, most shiet is made in hong kong not meant to last long..
 


batman smd

New Member
hey another question real quick, i wanna get some cams for my car...2000 gsr...its a daily driver so i want some to where im not going to have to change my injectors or computer or any nonsence like that...just want a little bit more dependable horsepower...and should i rebuild my head with new valves and stuff...my car has 75k
 


JDMxDB8

Raceline USA
batman smd said:
hey another question real quick, i wanna get some cams for my car...2000 gsr...its a daily driver so i want some to where im not going to have to change my injectors or computer or any nonsence like that...just want a little bit more dependable horsepower...and should i rebuild my head with new valves and stuff...my car has 75k
Click to expand...
From what you're asking, I recommend getting some ITR cams. Gives you a bit more power without having to do any major modification.
 

batman smd

New Member
thats what i heard...how much of a differance do the itr cams make..should i rebuild my head with new valves and springs
 

Aussie

Zoom-Zoom
No it will be fine with the stock ones. It's not going to hurt to upgrade them but you could get away with out doing it.
 
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