taking out cats..and such

capo1m · 07-05-2010, 12:44 AM

i was thinking about taking out my cats on the 325i and straight piping but loss of torque scares me as i already lost it taking out the resonator i know i will gain hp but the 325i already has low torque and the only mod that added torque so far for me was pbx so is there anything i could do to gain sound hp and torque?

Wlew · 07-05-2010, 01:03 AM

you didnt lose a single thing by deleting the resonator. only thing you lost was about 15 pounds. thus giving you some power from weight loss. as for the cats... i dunno. you talking secondary or primary? that changes things...

c_jeong89 · 07-05-2010, 06:31 AM

i might be deleting my secondary cats tomorrow or in the near future. I myself don't have a res either. Going to a shop tomorrow to see how much they would charge and I already know they are willing to do it.

Express · 07-05-2010, 07:58 AM

why dont you just buy the OBX headers from craven? problem solved. no power loss.

capo1m · 07-05-2010, 10:07 AM

Quote:

Originally Posted by express705

why dont you just buy the OBX headers from craven? problem solved. no power loss.

i dont know if i want to spend 400 for headers and i got a quote of 650 to install them and how the o2 sensors have to be tweaked so often as i was reading in bis thread he still is making adjusments which i wont be able to do my self

capo1m · 07-05-2010, 10:08 AM

Quote:

Originally Posted by Wlew

you didnt lose a single thing by deleting the resonator. only thing you lost was about 15 pounds. thus giving you some power from weight loss. as for the cats... i dunno. you talking secondary or primary? that changes things...

both or one or the other you tell me which would be the best

Wlew · 07-05-2010, 10:21 AM

well, depending on your state inspection laws you probably will have to have your primary cats. at least in NC I know you have to on our cars. older cars no. so you can delete the 2nd cats. I have heard it gains 5whp and ive heard you lose tq because of loss of back pressure. I have been thinking about this for a while as well. However, the one thing you and I both have going for us is we still have a muffler. so we will maintain some back pressure. But to be honest, I dont know if deleting them will do that much, there is no proven dyno gains on this... You dont need 2nd cats though, so long as you have primary.

If you find something, by all means share it with the forum. I would love to see a dyno, and if there are gains, I would delete them myself.

one thing to keep in mind as a draw back... the gaseous smell of emissions would be a little stronger if you deleted them. meaning when stopped at a light or something, you might smell your gas/fumes a little stronger. some like it some dont. just something to keep in mind.

hope this helps. Ill be watching closely.

Express · 07-05-2010, 10:22 AM

Quote:

Originally Posted by Capo330i

i dont know if i want to spend 400 for headers and i got a quote of 650 to install them and how the o2 sensors have to be tweaked so often as i was reading in bis thread he still is making adjusments which i wont be able to do my self

650 to install??? fuck that!! if you were local i would do it for you. i plan on doing the install myself, and the o2 sims are easy to adjust. a caveman could do it.

reconsider your options and ability to do things yourself.

capo1m · 07-05-2010, 10:25 AM

Quote:

Originally Posted by express705

650 to install??? fuck that!! if you were local i would do it for you. i plan on doing the install myself, and the o2 sims are easy to adjust. a caveman could do it.

reconsider your options and ability to do things yourself.

well where are you located?

capo1m · 07-05-2010, 10:26 AM

Quote:

Originally Posted by TrackRat

Cats and dogs are very nice and should be taken out... for walks daily.

Express · 07-05-2010, 10:27 AM

Quote:

Originally Posted by Capo330i

well where are you located?

south florida

capo1m · 07-05-2010, 10:37 AM

Quote:

Originally Posted by express705

south florida

ooo yeah lol well i dont know isnt there an efficent way with cats to make power

jfisher160 · 07-05-2010, 02:01 PM

Quote:

Originally Posted by Capo330i

ooo yeah lol well i dont know isnt there an efficent way with cats to make power

Capo330i, I would talk to Craven about this. He is running not cats and new headers on his car and got alot of gains. He doing all the work on my car and has helped me alot with gaining power, also has alot of different ideas on what you can do.I would hit him up

capo1m · 07-05-2010, 02:17 PM

Quote:

Originally Posted by jfisher160

Capo330i, I would talk to Craven about this. He is running not cats and new headers on his car and got alot of gains. He doing all the work on my car and has helped me alot with gaining power, also has alot of different ideas on what you can do.I would hit him up

i will do but its just gunna cost me over 1k to do headers and it is alot of money for well yet unproved gains

Express · 07-05-2010, 02:18 PM

false. you just dont think you have the ability to remove a few bolts yourself. and plus, what shop charged 650 to install headers? are they on crack?

capo1m · 07-05-2010, 02:46 PM

Quote:

Originally Posted by express705

false. you just dont think you have the ability to remove a few bolts yourself. and plus, what shop charged 650 to install headers? are they on crack?

maybe but ill ask again for another quote see what they say and im 16 dont have a lift and will fuck shit up doing it by myself

Express · 07-05-2010, 03:00 PM

Quote:

Originally Posted by Capo330i

maybe but ill ask again for another quote see what they say and im 16 dont have a lift and will fuck shit up doing it by myself

when i was 16 i was installing superchargers out of my garage with hand tools.

get some jack stands, a few beers, a friend to help, and get to work.

e92justin · 07-05-2010, 03:17 PM

Quote:

Originally Posted by Capo330i

maybe but ill ask again for another quote see what they say and im 16 dont have a lift and will fuck shit up doing it by myself

How are you 16 and have all of those mods on your car... last time i checked burger king payed minimum wage

Express · 07-05-2010, 03:19 PM

Quote:

Originally Posted by e92justin

How are you 16 and have all of those mods on your car... last time i checked burger king payed minimum wage

and how old are you? 17?

e92justin · 07-05-2010, 03:55 PM

Quote:

Originally Posted by express705

and how old are you? 17?

Yes. and i have no where near that many mods. 8 dollars an hour can only get you so far... btw i dont know what you were installing blowers on but these new BMWs are no where as easy to mess with as older muscle cars and tuners.

Express · 07-05-2010, 03:57 PM

Quote:

Originally Posted by e92justin

Yes. and i have no where near that many mods. 8 dollars an hour can only get you so far...

are you jealous because he works harder than you, or his parents support his modding?

dont be. its a way of life. im sure you didn't pay for your car either.

e92justin · 07-05-2010, 04:03 PM

Quote:

Originally Posted by express705

are you jealous because he works harder than you, or his parents support his modding?

dont be. its a way of life. im sure you didn't pay for your car either.

i work 6 out of 7 days a week bro, dont tell me im jealous because he works harder. no i didnt pay for my car. no my parents dont support my modding. i was simply asking him a question. i wasnt insulting him. i dont see why you have to be such a little cry baby bitch and try to make me feel bad by insulting me, it really isnt necessary.

07-05-2010, 12:44 AM	#1
capo1m Colonel 89 Rep 2,030 Posts Drives: 1M, M4 Join Date: Nov 2009 Location: Middletown,Ny iTrader: (17)	taking out cats..and such i was thinking about taking out my cats on the 325i and straight piping but loss of torque scares me as i already lost it taking out the resonator i know i will gain hp but the 325i already has low torque and the only mod that added torque so far for me was pbx so is there anything i could do to gain sound hp and torque? __________________ AW E82 1M MW F82 M4
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07-05-2010, 01:03 AM	#2
Wlew Major 77 Rep 1,116 Posts Drives: 2011 E90 335i Join Date: Sep 2009 Location: Washington, DC iTrader: (12)	you didnt lose a single thing by deleting the resonator. only thing you lost was about 15 pounds. thus giving you some power from weight loss. as for the cats... i dunno. you talking secondary or primary? that changes things... __________________ 2011 335i Sports Package \| VRSF FMIC \| Cobb AP3 \| Dinan Exhaust \| BMS Intake \| VRSF CP \| Lux H8 Angel Eyes \| Mtec LED Fogs \|
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07-05-2010, 06:31 AM	#3
c_jeong89 Banned 85 Rep 2,097 Posts Drives: E90 TiAg Join Date: Feb 2009 Location: Irvine/Bay Area iTrader: (16)	i might be deleting my secondary cats tomorrow or in the near future. I myself don't have a res either. Going to a shop tomorrow to see how much they would charge and I already know they are willing to do it.
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07-05-2010, 07:58 AM	#4
Express Major General 369 Rep 8,693 Posts Drives: 06 330i Join Date: Dec 2008 Location: The Promise Land iTrader: (17) Garage List 2006 BMW 330i [8.30]	why dont you just buy the OBX headers from craven? problem solved. no power loss.
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07-05-2010, 10:21 AM	#7
Wlew Major 77 Rep 1,116 Posts Drives: 2011 E90 335i Join Date: Sep 2009 Location: Washington, DC iTrader: (12)	well, depending on your state inspection laws you probably will have to have your primary cats. at least in NC I know you have to on our cars. older cars no. so you can delete the 2nd cats. I have heard it gains 5whp and ive heard you lose tq because of loss of back pressure. I have been thinking about this for a while as well. However, the one thing you and I both have going for us is we still have a muffler. so we will maintain some back pressure. But to be honest, I dont know if deleting them will do that much, there is no proven dyno gains on this... You dont need 2nd cats though, so long as you have primary. If you find something, by all means share it with the forum. I would love to see a dyno, and if there are gains, I would delete them myself. one thing to keep in mind as a draw back... the gaseous smell of emissions would be a little stronger if you deleted them. meaning when stopped at a light or something, you might smell your gas/fumes a little stronger. some like it some dont. just something to keep in mind. hope this helps. Ill be watching closely. __________________ 2011 335i Sports Package \| VRSF FMIC \| Cobb AP3 \| Dinan Exhaust \| BMS Intake \| VRSF CP \| Lux H8 Angel Eyes \| Mtec LED Fogs \|
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07-05-2010, 02:18 PM	#15
Express Major General 369 Rep 8,693 Posts Drives: 06 330i Join Date: Dec 2008 Location: The Promise Land iTrader: (17) Garage List 2006 BMW 330i [8.30]	false. you just dont think you have the ability to remove a few bolts yourself. and plus, what shop charged 650 to install headers? are they on crack?
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