High flow cats? - TriStateTuners.com :: Home of Tristate Auto Enthusiast

jesse096 · 10-28-2010, 01:24 PM

I was looking at getting some high flow cats on my truck, but I've been told that I'll throw some codes, is this true? The truck is a 4.3L V6, OBDII. I searched Google but found nothing for my truck...

-Jesse

Diablo2424 · 10-28-2010, 01:25 PM

I put a high flow cat on my Grand Prix GTP, with headers and used the stock cat-back/O2 sensors, never had any codes thrown..

just my $0.02

i_ride_fieroGT · 10-28-2010, 02:42 PM

I'm putting a hi gh flow cat on my IMSA just to keep it legal and driveable. They work the same way as a standerd cat so i dont see any problems with it.

SuperSlow764 · 10-28-2010, 03:11 PM

It's a toss up. Seen a lot of GM's with high flow's that will throw the code and some that don't. Could find somebody with HPtuners and delete the cat codes and problem solved.

RedBowTies88 · 10-28-2010, 03:13 PM

or efilive, easy to set the code to not report but it costs 100 bucks

mckpat03 · 10-28-2010, 03:24 PM

Off road exhaust FTW.

SuperSlow764 · 10-28-2010, 03:24 PM

true but in my eyes $100 bucks to delete the codes and then basically have unlimited tuning is worth it. I basically purchased HPtuners for myself. I have made my money back on it but thats besides the point.

jesse096 · 10-28-2010, 11:25 PM

I've been thinking about getting my truck tuned, it's such a dog now it's unreal... plus the added option of taking that ****ty 97MPH speed limiter off is a bonus... I want to grab myself a wide band though, I don't wanna go too lean and blow the thing up, it's only got about 85K on it

-Jesse

RedBowTies88 · 10-29-2010, 10:41 AM

Quote:

Originally Posted by jesse096

I've been thinking about getting my truck tuned, it's such a dog now it's unreal... plus the added option of taking that ****ty 97MPH speed limiter off is a bonus... I want to grab myself a wide band though, I don't wanna go too lean and blow the thing up, it's only got about 85K on it

-Jesse

im sure there is someone somewhat near you with efilive, check all the chevy forums, they can for the cost of a license et rid of that jackass limiter and correct speed-o's and turn off codes and whatnot. then they can give you a copy of your stock calibration and you can send it some someone like black bear and have them build you a tune then it can be loaded into your truck for free.

ide offer to do it for you but i doubt you wanna drive all the way to jersey

jpalamar · 10-29-2010, 10:57 AM

High flow cats are pointless on cars under 500HP. I posts a study awhile back that should less then 1 HP difference from going stock, to catless, to high flows. Save your money.

FYI, there is no guarentee with high flows you won't throw a code.

jesse096 · 10-29-2010, 05:10 PM

I don't care about the power aspect ,I just wanna be louder :D

Plus, I think my cats are about done, it smells like I've been dumping unburnt fuel thru them, and I'm pretty sure that's not a good thing... If I have to replace them, I'm gonna go with the high flows.

-Jesse

jesse096 · 10-29-2010, 05:10 PM

Quote:

Originally Posted by RedBowTies88

im sure there is someone somewhat near you with efilive, check all the chevy forums, they can for the cost of a license et rid of that jackass limiter and correct speed-o's and turn off codes and whatnot. then they can give you a copy of your stock calibration and you can send it some someone like black bear and have them build you a tune then it can be loaded into your truck for free.

ide offer to do it for you but i doubt you wanna drive all the way to jersey

Depends on where at in Jersey, 609 is near Mount Laurel isn't it? My aunt lives near there and it's about a half hour away from me...

-Jesse

MKIIIsuprakid · 10-29-2010, 06:18 PM

Check out magnAflow they make a direct fit ( bolt on) and universal (weld in) but my poit is that I have a hi flow cat from them for my 84 supra. I am sure they make one for your truck.

I ran my car all day yesterday with out my magnAflow muffler, just the cat and 2.5 piping and god damn is it loud.

A hi flow ca will make a sound difference but not much without bigger pipes.

jesse096 · 10-29-2010, 06:42 PM

I'm sure there's a lot of companys with them that fit my truck, but I'll give MagnaFlow a try. I just want something that flows a little better than stock without going completely cat-less, since I still like to have my truck inspected like normal...

-Jesse

MKIIIsuprakid · 10-29-2010, 10:57 PM

Quote:

Originally Posted by jesse096

I'm sure there's a lot of companys with them that fit my truck, but I'll give MagnaFlow a try. I just want something that flows a little better than stock without going completely cat-less, since I still like to have my truck inspected like normal...

-Jesse

Well yeah Iam sure there are plenty of places that do for your truck haha. But for my almost there 30 year old car it's hard to find.

But yeah the manga flow sounds great I can say that I have been happy with it.

Honduh · 11-01-2010, 01:20 AM

Its very possible that it will throw a cat efficiency code or secondary o2 code.

RedBowTies88 · 11-01-2010, 09:48 AM

Quote:

Originally Posted by jpalamar

High flow cats are pointless on cars under 500HP. I posts a study awhile back that should less then 1 HP difference from going stock, to catless, to high flows. Save your money.

FYI, there is no guarentee with high flows you won't throw a code.

actually that depends highly on the application, every vehicle is different and some companies suck at making efficient cats more then others. my cat choked up my truck significantly while just barely scrapeing the 400whp level

Quote:

Originally Posted by jesse096

Depends on where at in Jersey, 609 is near Mount Laurel isn't it? My aunt lives near there and it's about a half hour away from me...

-Jesse

well that also may be 609 however im from cape may county, basically as far south in jersey as you can go. about an hour from mount laurel

10-28-2010, 03:13 PM	#5
RedBowTies88 Tri-State Post Whore Join Date: Jul 2010 Location: Cape May County Member #16880 My Ride: car? iTrader: (0)	or efilive, easy to set the code to not report but it costs 100 bucks __________________ Beech - Thats my real name ;) Nobody On This Forum Cares About Real Performance ^If you disagree prove me wrong To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

10-28-2010, 03:24 PM	#6
mckpat03 Tri-State Post Whore Join Date: Dec 2009 Location: Lewistown, PA Member #15251 My Ride: Mainly VWs iTrader: (0)	Off road exhaust FTW. __________________ - Pat '10 Touareg TDI w/air - deleted/tuned, tow pig, offroad-ish project '15 Sportwagen TDI SEL LP - Daily

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10-28-2010, 01:25 PM	#2
Diablo2424 Tri-State Aficionado Join Date: Feb 2006 Location: CLT, NC Member #1423 My Ride: 16 Jetta GLI iTrader: (0)	I put a high flow cat on my Grand Prix GTP, with headers and used the stock cat-back/O2 sensors, never had any codes thrown.. just my $0.02

10-28-2010, 02:42 PM	#3
i_ride_fieroGT Tri-State Post Whore Banned Join Date: Jan 2009 Location: all over Member #10595 My Ride: Does not hit mivec anymore.(DD) 06 solstice 5 speed. 84 IMSA Fiero5 speed. 87 Fiero GT 5 speed iTrader: (0)	I'm putting a hi gh flow cat on my IMSA just to keep it legal and driveable. They work the same way as a standerd cat so i dont see any problems with it.

10-28-2010, 03:11 PM	#4
SuperSlow764 Tri-State Aficionado Join Date: Sep 2010 Location: Levittown Member #17459 My Ride: 03 Evo 8 iTrader: (2)	It's a toss up. Seen a lot of GM's with high flow's that will throw the code and some that don't. Could find somebody with HPtuners and delete the cat codes and problem solved.

10-29-2010, 10:57 AM	#10
jpalamar TST Ruined My Life! Join Date: May 2009 Location: Collegeville, PA Member #13773 My Ride: 03 Corvette Z06 iTrader: (3)	High flow cats are pointless on cars under 500HP. I posts a study awhile back that should less then 1 HP difference from going stock, to catless, to high flows. Save your money. FYI, there is no guarentee with high flows you won't throw a code.

10-29-2010, 06:18 PM	#13
MKIIIsuprakid Tri-State Addict Join Date: Apr 2008 Location: upper darby Member #7536 My Ride: is old iTrader: (0)	Check out magnAflow they make a direct fit ( bolt on) and universal (weld in) but my poit is that I have a hi flow cat from them for my 84 supra. I am sure they make one for your truck. I ran my car all day yesterday with out my magnAflow muffler, just the cat and 2.5 piping and god damn is it loud. A hi flow ca will make a sound difference but not much without bigger pipes.

11-01-2010, 01:20 AM	#16
Honduh Tri-State Post Whore Join Date: May 2006 Member #1977 iTrader: (0)	Its very possible that it will throw a cat efficiency code or secondary o2 code.