Stillen HFC vs. BERK HFC

f4ifusion · 04-14-2009, 08:57 PM

Not sure this really matters for those that are planning on heavily modding their cars, but i was thinking of getting the stillen HFC's and the thing that turned me off about the stillens was the fact that they are not CARB legal. so i think i will stick with the Berk's. also apologize if this was mentioned earlier.

RCZ · 04-14-2009, 09:03 PM

The Berks arent carb legal either afaik. Aren't they only 49 state legal?

Also Balanbro, the second o2 sensor does nothing but check for cat deficiencies.

I for one, have found a different fix to this problem....I think I'm going with race pipes.

f4ifusion · 04-14-2009, 09:10 PM

Quote:

Originally Posted by RCZ

The Berks arent carb legal either afaik. Aren't they only 49 state legal?

yeah youre absolutely right, but does the stillen claim even that? its not on their site. It also doesn't claim to be OBDII compliant, thats a big deal in NC. i was just saying though, I'm still really new to this so set me straight if im jacked up!

RCZ · 04-14-2009, 09:24 PM

Quote:

Originally Posted by f4ifusion

yeah youre absolutely right, but does the stillen claim even that? its not on their site. It also doesn't claim to be OBDII compliant, thats a big deal in NC. i was just saying though, I'm still really new to this so set me straight if im jacked up!

OBDII compliant? OBDII is diagnostics system. Uses a port under your steering wheel to read whether you have had or have diagnostic codes triggered. What the heck does OBDII compliant mean? hehe I think you are talking about whether you have check engine lights or codes scannable with the OBDII scanner. Maybe? If you have triggered codes, you may not pass the test.

wstar · 04-14-2009, 09:56 PM

Quote:

Originally Posted by RCZ

I for one, have found a different fix to this problem....I think I'm going with race pipes.

Plug the bungs and run O2 sims?

Josh@STILLEN · 04-14-2009, 09:57 PM

Quote:

Originally Posted by wstar

Plug the bungs and run O2 sims?

No can do.. the rear O2 sensors control fuel trims..

EDIT: I should clarify.. secondary fuel trims associated with CELs..

wstar · 04-14-2009, 10:30 PM

Quote:

Originally Posted by Josh@STILLEN

No can do.. the rear O2 sensors control fuel trims..

Really? I figured that's why they had 4: the front ones to control the mix and the rear ones for emissions crap that doesn't really matter.

NIZMOZ · 04-15-2009, 08:04 AM

Quote:

Originally Posted by wstar

Really? I figured that's why they had 4: the front ones to control the mix and the rear ones for emissions crap that doesn't really matter.

Per UPREV this is correct. The rear ones only verify the cats are working and that is all. The car runs no different and these can be turned off in the ECU tuning.

JvKintheUSA · 07-21-2009, 08:45 PM

Does triggering a code damage the engine or affect performance? I plan on installing a HFC, but I hate to deal with all the potential issues mentioned in this thread

semtex · 07-22-2009, 07:46 AM

Quote:

Originally Posted by JvKintheUSA

Does triggering a code damage the engine or affect performance? I plan on installing a HFC, but I hate to deal with all the potential issues mentioned in this thread

No, it doesn't.

Josh@STILLEN · 04-14-2009, 09:18 PM

No high-flow cats for these applications are CARB legal.. and while they will pass the sniffer test.. it's against federal law to replace your factory cats for use on the road. HFCs are sold with the intention that they will not be used on federal roads.

f4ifusion · 04-14-2009, 09:24 PM

Quote:

Originally Posted by Josh@STILLEN

No high-flow cats for these applications are CARB legal.. and while they will pass the sniffer test.. it's against federal law to replace your factory cats for use on the road. HFCs are sold with the intention that they will not be used on federal roads.

Thanks for clearing that up for me Josh. That makes a lot more sense to me now.

also wanted to mention that i just received your catback system and love it! I am definitely going to be getting your headers and g3 intake as well. great products

f4ifusion · 04-14-2009, 09:39 PM

yeah maybe compliant is the wrong word, maybe friendly, it was something i read on a post from kyle at importpartspro.....haha...thats what i was trying to say, maybe i just read it wrong. as little as i do know about this stuff i understand that its a diagnostic system.

frost · 04-14-2009, 11:18 PM

This is an interesting thread, hopefully people take a look at it before plunging into purchasing HFCs. There is a little more to it with this car than I have experienced in my previous vehicles.

zman1910 · 04-14-2009, 11:39 PM

Here's my take on things.

If your gonna get a CEL with HFC's, whether it be after 200 miles or 3k miles, might as well just get test pipes and maximize power output. It wouldn't make any sense considering the price of HFC's, unless you live in a highly regulated state like CA.

As someone previously stated, these things just come with the territory of modding. The light never bothered me but I guess I'm just so used to it that I never notice it anymore.

04-14-2009, 09:03 PM	#2 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1120	The Berks arent carb legal either afaik. Aren't they only 49 state legal? Also Balanbro, the second o2 sensor does nothing but check for cat deficiencies. I for one, have found a different fix to this problem....I think I'm going with race pipes. Last edited by RCZ; 04-14-2009 at 09:05 PM.

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04-14-2009, 08:57 PM	#1 (permalink)
f4ifusion Base Member Join Date: Apr 2009 Location: North Carolina Posts: 18 Drives: 2009 370z Blk M6 Rep Power: 18	Not sure this really matters for those that are planning on heavily modding their cars, but i was thinking of getting the stillen HFC's and the thing that turned me off about the stillens was the fact that they are not CARB legal. so i think i will stick with the Berk's. also apologize if this was mentioned earlier.

07-21-2009, 08:45 PM	#9 (permalink)
JvKintheUSA Enthusiast Member Join Date: Jun 2009 Location: Canton, GA Posts: 465 Drives: 2013 Shelby GT500 Rep Power: 429	Does triggering a code damage the engine or affect performance? I plan on installing a HFC, but I hate to deal with all the potential issues mentioned in this thread

04-14-2009, 09:18 PM	#11 (permalink)
Josh@STILLEN The370Z.com Sponsor Join Date: Dec 2008 Location: Costa Mesa, CA Posts: 1,197 Drives: 2004 G35 Coupe 6MT Rep Power: 535	No high-flow cats for these applications are CARB legal.. and while they will pass the sniffer test.. it's against federal law to replace your factory cats for use on the road. HFCs are sold with the intention that they will not be used on federal roads.

04-14-2009, 09:39 PM	#13 (permalink)
f4ifusion Base Member Join Date: Apr 2009 Location: North Carolina Posts: 18 Drives: 2009 370z Blk M6 Rep Power: 18	yeah maybe compliant is the wrong word, maybe friendly, it was something i read on a post from kyle at importpartspro.....haha...thats what i was trying to say, maybe i just read it wrong. as little as i do know about this stuff i understand that its a diagnostic system.

04-14-2009, 11:18 PM	#14 (permalink)
frost Retired admin Join Date: Dec 2008 Location: Winterfell Posts: 106,613 Drives: Your Wife Crazy Rep Power: 0	This is an interesting thread, hopefully people take a look at it before plunging into purchasing HFCs. There is a little more to it with this car than I have experienced in my previous vehicles.

04-14-2009, 11:39 PM	#15 (permalink)
zman1910 Enthusiast Member Join Date: Nov 2008 Location: FL Posts: 361 Drives: 2011 Audi S4 Rep Power: 430	Here's my take on things. If your gonna get a CEL with HFC's, whether it be after 200 miles or 3k miles, might as well just get test pipes and maximize power output. It wouldn't make any sense considering the price of HFC's, unless you live in a highly regulated state like CA. As someone previously stated, these things just come with the territory of modding. The light never bothered me but I guess I'm just so used to it that I never notice it anymore.