Stillen HFC vs. BERK HFC

LiquidZ · 04-21-2009, 09:49 PM

Quote:

Originally Posted by Zeto

Sorry to take this off topic but are there any test pipe options available?

Berk and GTM I think.

Zeto · 04-21-2009, 10:00 PM

Quote:

Originally Posted by LiquidZ

Berk and GTM I think.

Link? Also is the power difference negligible?

Minicobra1 · 04-26-2009, 01:43 AM

Installed my Berk HFC's yesterday, I love them

See review and video here: 370Z Exhaust Sound Clip data base

mpp9 · 04-30-2009, 03:52 PM

Not sure if this was answered but are the stillen hfcs 49 state legal like the berks? I live in pittsburgh so I don't have to deal with the bull**** that's in california.

Josh@STILLEN · 06-18-2009, 11:50 AM

Quote:

Originally Posted by mpp9

Not sure if this was answered but are the stillen hfcs 49 state legal like the berks? I live in pittsburgh so I don't have to deal with the bull**** that's in california.

It's a federal mandate that prohibits on-road cars from eliminating the catalytic converters, and California has a visual test, where other states do not.

This would pertain to any high flow cat or test pipes, etc.

That being said, they will pass a sniffer test, but the official word is that they are for off-road use only, and that's the only condition we sell them.

semtex · 06-18-2009, 12:49 PM

It's more dramatic this way.

Junior370z · 06-18-2009, 01:08 PM

Quote:

Originally Posted by semtex

It's more dramatic this way.

I guess LOL!

shumby · 07-22-2009, 07:55 AM

bolt on will not hurt the auto tranny. you will never see any HP that will screw it. a stage one turbo is safe on the stock tranny.

Rob@Altered · 07-22-2009, 09:42 AM

Check out HFC out too.
We have competitive pricing and offer high quality product.

Thank you

AAM | AAM Competition 2.5" High Flow Cats

nightfire · 07-22-2009, 01:26 PM

Ok so I've read through the whole thread, but I have a question on all this (during these note that I live in NJ who is pretty heavy on the emissions testing)

If a person were to go with test pipes instead of HFC's could they just clear the CEL and prevent it from coming back on with a program such as UpREV by having it de-activate the second O2 sensor (to prevent any problems when getting inspected)?

I'm trying to figure out why everyone here (who almost everyone wants max performance N/A for now) are going with HFC's instead of test pipes.

wstar · 07-22-2009, 01:45 PM

Quote:

Originally Posted by nightfire

Ok so I've read through the whole thread, but I have a question on all this (during these note that I live in NJ who is pretty heavy on the emissions testing)

If a person were to go with test pipes instead of HFC's could they just clear the CEL and prevent it from coming back on with a program such as UpREV by having it de-activate the second O2 sensor (to prevent any problems when getting inspected)?

I'm trying to figure out why everyone here (who almost everyone wants max performance N/A for now) are going with HFC's instead of test pipes.

It's going to vary by state, I know nothing about NJ. Here in TX you can generally get away with reprogramming around the CEL (as in, actually reprogramming the ECU), but just "clearing" it with a simple code-scanner won't usually cut it (because the OBD-II info the emissions testing place looks at shows whether a complete drive cycle has been performed since the last code clear, and they want to see it showing completed and free of codes). There's no inspection for the first 2 years on a new car though, so in TX you'd have two years to find an ECU solution before you ran into that issue.

Technically, even in TX, I think test pipes are illegal on public streets, but if you can suppress the codes with an ECU flash, you'll probably get away with it since many inspection places only care about the OBD-II readout.
I went the HFC route because at the time I was making the decision there was no ECU flashing available for the car at all yet, and I didn't want to be fighting clearing the codes all the time until one became available (having a CEL thrown randomly while you're driving and not knowing what it is sucks, gotta shut down, get out the scanner, confirm it's the O2, clear it, wait for it to happen again...).

Once I get an ECU flash going that can suppress the CELs effectively, I may decide to swap my HFCs for Test Pipes at that point, if the rasp isn't too bad (maybe resonated ones would help).

nightfire · 07-22-2009, 01:48 PM

Quote:

Originally Posted by wstar

It's going to vary by state, I know nothing about NJ. Here in TX you can generally get away with reprogramming around the CEL (as in, actually reprogramming the ECU), but just "clearing" it with a simple code-scanner won't usually cut it (because the OBD-II info the emissions testing place looks at shows whether a complete drive cycle has been performed since the last code clear, and they want to see it showing completed and free of codes). There's no inspection for the first 2 years on a new car though, so in TX you'd have two years to find an ECU solution before you ran into that issue.

Technically, even in TX, I think test pipes are illegal on public streets, but if you can suppress the codes with an ECU flash, you'll probably get away with it since many inspection places only care about the OBD-II readout.
I went the HFC route because at the time I was making the decision there was no ECU flashing available for the car at all yet, and I didn't want to be fighting clearing the codes all the time until one became available (having a CEL thrown randomly while you're driving and not knowing what it is sucks, gotta shut down, get out the scanner, confirm it's the O2, clear it, wait for it to happen again...).

Once I get an ECU flash going that can suppress the CELs effectively, I may decide to swap my HFCs for Test Pipes at that point, if the rasp isn't too bad (maybe resonated ones would help).

Can UpRev or Cobb effectively suppress the CELs? Because then I would just go with test pipes. Maybe i'll weld some shields or something on to make it look like stock cats in case they decide to take a look under the car (which they usually do a quick sweep with a mirror)

Zeto · 08-01-2009, 09:53 AM

I just put in the Berk test pipes and they sound great!

will abrahams · 11-13-2009, 09:15 PM

My Berk HFCs arrived today!

earlier someone asked what the inside of the secondary O2 sensor ports look like. Im assuming they were wondering if they are completely open or have an anti-fouler like small opening.

Here is a pic, sorry for the poor quality.

as you can see, they drill a very small opening to replicate the anti fouler method. I plan on stuffing some steel wool in there too. I will see how it goes...

Red370 · 11-13-2009, 11:48 PM

Quote:

Originally Posted by will abrahams

My Berk HFCs arrived today!

earlier someone asked what the inside of the secondary O2 sensor ports look like. Im assuming they were wondering if they are completely open or have an anti-fouler like small opening.

Here is a pic, sorry for the poor quality.

oh man, get those bad boys on, your car WILL COME TO LIFE!!!!! She will scream like a virgin on prom night.

04-26-2009, 01:43 AM	#3 (permalink)
Minicobra1 A True Z Fanatic Join Date: Nov 2008 Location: Orange County, CA. Posts: 1,205 Drives: 370Z Tour, Spt, 6mt Rep Power: 645	Installed my Berk HFC's yesterday, I love them See review and video here: 370Z Exhaust Sound Clip data base __________________ 370z Tour\| Spt Pack\|Navi\|BERK CBE\|Berk HFC's\| Eibach Springs\| Hotchkis Sway Bars\|SPC Camber Arms\|15mm Ichiba Wheel Spacers\| 19"Factory Nismo Wheels-Matt Black\|Stop Tech Rotors\|TWM Shifter\|3M Tint\|Black Fangs\|Black Rear Valance\|JDM Fog Light\| MY BAND-www.myspace.com/petroleum

06-18-2009, 12:49 PM	#6 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 33	It's more dramatic this way. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

07-22-2009, 07:55 AM	#8 (permalink)
shumby Captin Canuck Join Date: Dec 2008 Location: with your mom Age: 45 Posts: 6,288 Drives: your sister Rep Power: 237	bolt on will not hurt the auto tranny. you will never see any HP that will screw it. a stage one turbo is safe on the stock tranny. __________________ Originally Posted by SAM@GTM Engine detonation is not normal and it should never never happen, and whoever told that need to do something else for living . Sam

07-22-2009, 09:42 AM	#9 (permalink)
Rob@Altered Enthusiast Member Join Date: Jul 2009 Location: Gaithersburg Posts: 282 Drives: 350Z/370Z/GTR/G35 Rep Power: 369	Check out HFC out too. We have competitive pricing and offer high quality product. Thank you AAM \| AAM Competition 2.5" High Flow Cats __________________ Altered Atmosphere Motorsports RobS@alteredatmosphere.com

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04-30-2009, 03:52 PM	#4 (permalink)
mpp9 Base Member Join Date: Apr 2009 Location: Pittsburgh Posts: 103 Drives: 2012 sti Rep Power: 16	Not sure if this was answered but are the stillen hfcs 49 state legal like the berks? I live in pittsburgh so I don't have to deal with the bull**** that's in california.

07-22-2009, 01:26 PM	#10 (permalink)
nightfire Base Member Join Date: Apr 2009 Location: USA Posts: 178 Drives: Mk IV Jetta turbo Rep Power: 267	Ok so I've read through the whole thread, but I have a question on all this (during these note that I live in NJ who is pretty heavy on the emissions testing) If a person were to go with test pipes instead of HFC's could they just clear the CEL and prevent it from coming back on with a program such as UpREV by having it de-activate the second O2 sensor (to prevent any problems when getting inspected)? I'm trying to figure out why everyone here (who almost everyone wants max performance N/A for now) are going with HFC's instead of test pipes.

08-01-2009, 09:53 AM	#13 (permalink)
Zeto Track Member Join Date: Apr 2009 Location: North NJ Age: 41 Posts: 766 Drives: 09 Pearl White 370Z Rep Power: 267	I just put in the Berk test pipes and they sound great!