High flow precat gains?
#43
Moderator
iTrader: (1)
but it starts to lightly brown in a week or 2. if you left it for more than 3 weeks it would be the copper color posted on the 1st page of this thread.
Honestly, its not that bad.
and whats that one saying, oh yeah; you have to pay to play.
so the PCD's do come with compromises. you just have to know what you want.
#44
Instructor
Thread Starter
Hmm thanks for the replies everyone. PCD's are not an option for me due to where I live but I read on heeltoe automotive http://www.heeltoeauto.com/rv6-perfo...s-ua6-ua7.html that it is illegal. As far as I have heard as long as you have a cat you will pass emissions. As I said I live in Allegheny County near Pittsburgh PA.
#45
Hmm thanks for the replies everyone. PCD's are not an option for me due to where I live but I read on heeltoe automotive http://www.heeltoeauto.com/rv6-perfo...s-ua6-ua7.html that it is illegal. As far as I have heard as long as you have a cat you will pass emissions. As I said I live in Allegheny County near Pittsburgh PA.
you will see slightly lower yields than that chart is my guess.
#46
Advanced
so for someone with a type-s AT that does not want to worry about constantly cleaning the brown from the bumper or have the smell, is it better to simply buy a jpipe stick and stick with stock type-s cats? I absolutely do NOT want rasp by the way, so after reading this whole thread (and some others) i'm still foggy as to what is the best exhaust set up for someone that wants low-end power, no rasp, and no nasty smell/brown bumper? (don't mean to thread jack OP) just felt that was a relevant Q.
#47
Moderator
iTrader: (1)
so for someone with a type-s AT that does not want to worry about constantly cleaning the brown from the bumper or have the smell, is it better to simply buy a jpipe stick and stick with stock type-s cats? I absolutely do NOT want rasp by the way, so after reading this whole thread (and some others) i'm still foggy as to what is the best exhaust set up for someone that wants low-end power, no rasp, and no nasty smell/brown bumper? (don't mean to thread jack OP) just felt that was a relevant Q.
as there are many products available as you can mix and match and will have a different outcome.
Try the Jpipe first, as its every ones first mod.
there are no draw backs(rasp, bumper discoloration, smell, etc.) while increasing torque throughout the powerband.
Once you get a taste of the mod bug, you might change your mind on what else should be done to the car.
#48
Advanced
Best is SUBJECTIVE.
as there are many products available as you can mix and match and will have a different outcome.
Try the Jpipe first, as its every ones first mod.
there are no draw backs(rasp, bumper discoloration, smell, etc.) while increasing torque throughout the powerband.
Once you get a taste of the mod bug, you might change your mind on what else should be done to the car.
as there are many products available as you can mix and match and will have a different outcome.
Try the Jpipe first, as its every ones first mod.
there are no draw backs(rasp, bumper discoloration, smell, etc.) while increasing torque throughout the powerband.
Once you get a taste of the mod bug, you might change your mind on what else should be done to the car.
#50
Advanced
#51
Racer
iTrader: (1)
Hmm thanks for the replies everyone. PCD's are not an option for me due to where I live but I read on heeltoe automotive http://www.heeltoeauto.com/rv6-perfo...s-ua6-ua7.html that it is illegal. As far as I have heard as long as you have a cat you will pass emissions. As I said I live in Allegheny County near Pittsburgh PA.
Unlike California where we have tailpipe sniffer test and a visual inspection also . When I did it last month the tech says I have no emissions (I just had 3rd cat off with rv6 v3 jpipe) but "what's that shiny part where the converter should be?"
It's definitely a hassle.
#53
Officially, changing any cats at all on any car (regardless of if it's high flow or not) is illegal in all 50 states. It's a federal offense to tamper with catalytic converters. From what I saw about your county though it looks like they just do diagnostic tests? Meaning if your car isn't throwing CEL's it should be fine.
Unlike California where we have tailpipe sniffer test and a visual inspection also . When I did it last month the tech says I have no emissions (I just had 3rd cat off with rv6 v3 jpipe) but "what's that shiny part where the converter should be?"
It's definitely a hassle.
Unlike California where we have tailpipe sniffer test and a visual inspection also . When I did it last month the tech says I have no emissions (I just had 3rd cat off with rv6 v3 jpipe) but "what's that shiny part where the converter should be?"
It's definitely a hassle.
In many jurisdictions, it is illegal to remove or disable a catalytic converter for any reason other than its direct and immediate replacement. In the United States, for example, it is a violation of Section 203(a)(3)(A) of the 1990 Clean Air Act for a vehicle repair shop to remove a converter from a vehicle, or cause a converter to be removed from a vehicle, except in order to replace it with another converter.,[21] and Section 203(a)(3)(B) makes it illegal for any person to sell or to install any part that would bypass, defeat, or render inoperative any emission control system, device, or design element.
So all you vendors: Shame on you
#54
Racer
iTrader: (1)
A Type-S will still gain heavily from the full deletes. Going from 600 cell cats to straight pipes is still a vast improvement. In theory, it's the same flow improvement as going from the stock 900 cell base cats to the 200-300 cell HFC's.
High flow cats do not, in and of themselves. add rasp. I have none.
High flow cats do not, in and of themselves. add rasp. I have none.
A type-s with the ATLP V2 j-pipe, "stage 3" exhaust mod and RV6 HFPCs have a bit of rasp between 3000rpm and 3300rpm. Ask me how I know.
#55
#56
#57
All motor
Get them. You won't be disappointed.
If you were to dyno the HFPCs on a totally stock exhaust for an 08 5AT TL, you'd probably gain 8-10whp. Add a Jpipe and you may gain another 5-6 peak but more throughout the powerband. Add a catback onto that and you will probably gain another 5-6 peak. You can't 'add' the gains together, it doesn't work that way. Just know that after a full exhaust, your car will be noticeably faster at every RPM.
If you were to dyno the HFPCs on a totally stock exhaust for an 08 5AT TL, you'd probably gain 8-10whp. Add a Jpipe and you may gain another 5-6 peak but more throughout the powerband. Add a catback onto that and you will probably gain another 5-6 peak. You can't 'add' the gains together, it doesn't work that way. Just know that after a full exhaust, your car will be noticeably faster at every RPM.
#60
KingKong_Dav
it wont make the car unhealthy. the metal core is better,stronger and high flow(CFM).
i went from type s precats to pcd to hfpc. i have good midrange from hfpc. its something i can feel when it throws me back. the pcd have more top end but now im hfpc i have more driviability, streetibilty and i have no fuel smell and CEL. my pcd cause a strong unburned fuel scent and through a CEL so i switched to hfpc.
HFPC will wake up the engine over a type s cat. theres more mid range. HFPC shines down low and in the mid range. the top-end pcd owns.
i went from type s precats to pcd to hfpc. i have good midrange from hfpc. its something i can feel when it throws me back. the pcd have more top end but now im hfpc i have more driviability, streetibilty and i have no fuel smell and CEL. my pcd cause a strong unburned fuel scent and through a CEL so i switched to hfpc.
HFPC will wake up the engine over a type s cat. theres more mid range. HFPC shines down low and in the mid range. the top-end pcd owns.
#61
Just thought I would throw something else into the discussion between PCD's, hi-flow precats and J-pipes...Would it be better to replace the stock cats with either pcd's or hi-flows before a j-pipe on a high milage engine? After 150000 miles would cats start to get plugged therefore seeing more gain changing them? I'm trying to decide what to do first and everytime I come to this forum I change my mind...lol
#62
Suzuka Master
iTrader: (2)
^^
It's possible they could be starting to plug up, but then again there's also the chance the third cat is doing the same thing, but not as likely due its placement. I'd just do it all at once.
It's possible they could be starting to plug up, but then again there's also the chance the third cat is doing the same thing, but not as likely due its placement. I'd just do it all at once.
#63
My first ricer
iTrader: (4)
Since people are comparing stock, Type S, HFPC, and PCD's in this thread, what about just gutted stocks? I know the opening is a little smaller on the bottom but for somebody like troy above who is concerned he might have clogged high mileage cats, why not just gut them and put them back on with some O2 defoulers? It should have most of the gains of the PCDs. Has anyone ever dyno'd this?
#64
Racer
iTrader: (3)
Auto TL-S 78k miles. First time I put it on a dyno. Pretty sure I have an exhaust leak from
Where cats meet jpipe. Stock exhaust and still rocking 3rd cat. I don't get any rasp that I can notice to be honest. You won't be disappointed with either HFPC or PCD. No CELs.
Mods are Rv6 PCD and PnP runners I did myself.
7th car in.
Where cats meet jpipe. Stock exhaust and still rocking 3rd cat. I don't get any rasp that I can notice to be honest. You won't be disappointed with either HFPC or PCD. No CELs.
Mods are Rv6 PCD and PnP runners I did myself.
7th car in.
#65
Moderator
iTrader: (1)
Since people are comparing stock, Type S, HFPC, and PCD's in this thread, what about just gutted stocks? I know the opening is a little smaller on the bottom but for somebody like troy above who is concerned he might have clogged high mileage cats, why not just gut them and put them back on with some O2 defoulers? It should have most of the gains of the PCDs. Has anyone ever dyno'd this?
even bruce (acktl05)was thinking about offering this service.
my buddy gutted his cats and has the xlr8 v2 jpipe with a custom exhaust.
when we race; we're pretty much dead even.
#66
My first ricer
iTrader: (4)
Yeah I know it's not a new concept but the PCD's are 2.25" outlet and I think the stock ones are under 2". That's why I'm wondering if the gains are worth it over buying some used cats for $100 or less on the BM and gutting them, vs 400 for PCDs. Just curious if anybody dynoed one with stock hollow cats. If mine were clogged I might consider it but that'll probably be a long time from now. I've had other cars with gutted cats and on a larger case it sounds kinda crappy but I don't think it would sound so bad with smaller cats a few inches from the engine.
#68
Suzuka Master
iTrader: (2)
Auto TL-S 78k miles. First time I put it on a dyno. Pretty sure I have an exhaust leak from
Where cats meet jpipe. Stock exhaust and still rocking 3rd cat. I don't get any rasp that I can notice to be honest. You won't be disappointed with either HFPC or PCD. No CELs.
Mods are Rv6 PCD and PnP runners I did myself.
7th car in.
http://youtu.be/jNmpac_8urc
Where cats meet jpipe. Stock exhaust and still rocking 3rd cat. I don't get any rasp that I can notice to be honest. You won't be disappointed with either HFPC or PCD. No CELs.
Mods are Rv6 PCD and PnP runners I did myself.
7th car in.
http://youtu.be/jNmpac_8urc
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NvrDwn (02-25-2013)
#71
Pro
#72
OMG-6SPD
iTrader: (1)
Yeah I know it's not a new concept but the PCD's are 2.25" outlet and I think the stock ones are under 2". That's why I'm wondering if the gains are worth it over buying some used cats for $100 or less on the BM and gutting them, vs 400 for PCDs. Just curious if anybody dynoed one with stock hollow cats. If mine were clogged I might consider it but that'll probably be a long time from now. I've had other cars with gutted cats and on a larger case it sounds kinda crappy but I don't think it would sound so bad with smaller cats a few inches from the engine.
what power im putting down at the wheels now.
Trying to dyno it where i had my car dynoed
last time on my old heads. Ill post what it sounds
like with XLR8 V2 J pipe,gutted precats & custom
magnaflow 2.5" catback,no resonators (a buddy driving,im recording).
it loud at high rpms,but cruising its good
for being straight piped. No rasp at all.
edit: Here
Last edited by Bada$$VTEC; 02-25-2013 at 09:06 PM.
The following users liked this post:
Bada$$VTEC (02-26-2013)
#74
[quote=Bruce Banner;13953298]From WIKI:
In many jurisdictions, it is illegal to remove or disable a catalytic converter for any reason other than its direct and immediate replacement. In the United States, for example, it is a violation of Section 203(a)(3)(A) of the 1990 Clean Air Act for a vehicle repair shop to remove a converter from a vehicle, or cause a converter to be removed from a vehicle, except in order to replace it with another converter.,[21] and Section 203(a)(3)(B) makes it illegal for any person to sell or to install any part that would bypass, defeat, or render inoperative any emission control system, device, or design element.
So Screw who ever wrote this law! Tell them to go say that to Monsanto or the Oil Companies or Coal Or Fracking those ass-holes pollute the Water we drink and Land Look At Gas Land Movie, And we cant have a little fun with our cats!
In-Justice I tell you!
I Love The HFPC They Rock!
I can feel the Power when i slam on the pedal.......WOW!
I fuckn Love Rv6 HFPCs Best 600.00 i ever spend it!
Makes Driving Fun!
I spend more on gas because now im in a hurry to go anywhere just so i can hear them purrrrrrr.
Thank you Ritchie You Are A "GoodGuyRichie"
Josh Eat Your Heart Out!
In many jurisdictions, it is illegal to remove or disable a catalytic converter for any reason other than its direct and immediate replacement. In the United States, for example, it is a violation of Section 203(a)(3)(A) of the 1990 Clean Air Act for a vehicle repair shop to remove a converter from a vehicle, or cause a converter to be removed from a vehicle, except in order to replace it with another converter.,[21] and Section 203(a)(3)(B) makes it illegal for any person to sell or to install any part that would bypass, defeat, or render inoperative any emission control system, device, or design element.
So Screw who ever wrote this law! Tell them to go say that to Monsanto or the Oil Companies or Coal Or Fracking those ass-holes pollute the Water we drink and Land Look At Gas Land Movie, And we cant have a little fun with our cats!
In-Justice I tell you!
I Love The HFPC They Rock!
I can feel the Power when i slam on the pedal.......WOW!
I fuckn Love Rv6 HFPCs Best 600.00 i ever spend it!
Makes Driving Fun!
I spend more on gas because now im in a hurry to go anywhere just so i can hear them purrrrrrr.
Thank you Ritchie You Are A "GoodGuyRichie"
Josh Eat Your Heart Out!
#77
Safety Car
iTrader: (8)
[quote=RoadxRage;14339928]
From WIKI:
In many jurisdictions, it is illegal to remove or disable a catalytic converter for any reason other than its direct and immediate replacement. In the United States, for example, it is a violation of Section 203(a)(3)(A) of the 1990 Clean Air Act for a vehicle repair shop to remove a converter from a vehicle, or cause a converter to be removed from a vehicle, except in order to replace it with another converter.,[21] and Section 203(a)(3)(B) makes it illegal for any person to sell or to install any part that would bypass, defeat, or render inoperative any emission control system, device, or design element.
So Screw who ever wrote this law! Tell them to go say that to Monsanto or the Oil Companies or Coal Or Fracking those ass-holes pollute the Water we drink and Land Look At Gas Land Movie, And we cant have a little fun with our cats!
In-Justice I tell you!
I Love The HFPC They Rock!
I can feel the Power when i slam on the pedal.......WOW!
I fuckn Love Rv6 HFPCs Best 600.00 i ever spend it!
Makes Driving Fun!
I spend more on gas because now im in a hurry to go anywhere just so i can hear them purrrrrrr.
Thank you Ritchie You Are A "GoodGuyRichie"
Josh Eat Your Heart Out!
In many jurisdictions, it is illegal to remove or disable a catalytic converter for any reason other than its direct and immediate replacement. In the United States, for example, it is a violation of Section 203(a)(3)(A) of the 1990 Clean Air Act for a vehicle repair shop to remove a converter from a vehicle, or cause a converter to be removed from a vehicle, except in order to replace it with another converter.,[21] and Section 203(a)(3)(B) makes it illegal for any person to sell or to install any part that would bypass, defeat, or render inoperative any emission control system, device, or design element.
So Screw who ever wrote this law! Tell them to go say that to Monsanto or the Oil Companies or Coal Or Fracking those ass-holes pollute the Water we drink and Land Look At Gas Land Movie, And we cant have a little fun with our cats!
In-Justice I tell you!
I Love The HFPC They Rock!
I can feel the Power when i slam on the pedal.......WOW!
I fuckn Love Rv6 HFPCs Best 600.00 i ever spend it!
Makes Driving Fun!
I spend more on gas because now im in a hurry to go anywhere just so i can hear them purrrrrrr.
Thank you Ritchie You Are A "GoodGuyRichie"
Josh Eat Your Heart Out!
#78
Suzuka Master
iTrader: (2)
Honestly no on a Type-S, being that they're 600 cell stock. Going from stock precats to PCDs on a Type-S is similar to going from stock cats to HFPCs on a base as far as flow increase. I felt a power increase everywhere after doing my ATLP V1 and race pipe back in '08. Then when I did the HFPCs in '11 it felt less dramatic; I could only feel that the car was stronger above 5.5k
#79
OMG-6SPD
iTrader: (1)
I Love The HFPC They Rock!
I can feel the Power when i slam on the pedal.......WOW!
I fuckn Love Rv6 HFPCs Best 600.00 i ever spend it!
Makes Driving Fun!
I spend more on gas because now im in a hurry to go anywhere just so i can hear them purrrrrrr.
Thank you Ritchie You Are A "GoodGuyRichie"
Josh Eat Your Heart Out!
I can feel the Power when i slam on the pedal.......WOW!
I fuckn Love Rv6 HFPCs Best 600.00 i ever spend it!
Makes Driving Fun!
I spend more on gas because now im in a hurry to go anywhere just so i can hear them purrrrrrr.
Thank you Ritchie You Are A "GoodGuyRichie"
Josh Eat Your Heart Out!