Stillen HFC vs. BERK HFC

SOLISIMO · 04-13-2009, 08:11 AM

Quote:

Originally Posted by semtex

If you compare the photos of the two carefully, it appears that the Berks have two things that the Stillens don't. First, the port for the O2 sensors on the Berks are extended out to make them more resistant to throwing CELs. Secondly, notice that the Berks have a second set of O2 sensor ports built in for hooking up wide-band O2 sensors on a dyno, whereas the Stillens do not. Just making a couple of observations.

Edit: They also appear to yield less gain and are significantly more expensive than Berk. (Sorry Stillen/Josh/Kyle -- you know I love you guys but I have to call it the way I see it.)

On my G37 forums Berks HFC's are infamous for throwing codes almost all of them. The popular brand that they seem to be going with are Fast Intentions

semtex · 04-13-2009, 08:17 AM

Quote:

Originally Posted by SOLISIMO

On my G37 forums Berks HFC's are infamous for throwing codes almost all of them. The popular brand that they seem to be going with are Fast Intentions

My HFCs have yet to throw a single code on me. Of course, that's not to say it won't happen in the future (knock on wood). In any case, if the Berks throw codes even when they went to the trouble of extending the port out to give the O2 sensors some protection, what does that say about a design that doesn't do that at all?

SOLISIMO · 04-13-2009, 08:31 AM

Quote:

Originally Posted by semtex

My HFCs have yet to throw a single code on me. Of course, that's not to say it won't happen in the future (knock on wood). In any case, if the Berks throw codes even when they went to the trouble of extending the port out to give the O2 sensors some protection, what does that say about a design that doesn't do that at all?

I aggree, Im not picking sides just giving the information to help you guys that I have recieved and seen. Like I said my Ichibas have the extended port and havnt had a light in over 1k miles

NIZMOZ · 04-13-2009, 10:31 AM

Quote:

Originally Posted by SOLISIMO

On my G37 forums Berks HFC's are infamous for throwing codes almost all of them. The popular brand that they seem to be going with are Fast Intentions

This will happen with all HFCs as the O2s on the HR motors are more sensitive. Depends on the engine and time as mine didn't do it for 3000 miles and it popped on one day and kept coming on till I had to put the SS Wool in.

SOLISIMO · 04-13-2009, 11:40 AM

Quote:

Originally Posted by NIZMOZ

This will happen with all HFCs as the O2s on the HR motors are more sensitive. Depends on the engine and time as mine didn't do it for 3000 miles and it popped on one day and kept coming on till I had to put the SS Wool in.

Good looking on out on that wool trick, and yes Berk has been fixing their CEL problem, but like I said im not leaning towards any of the two. I just hope BERK would make some headers for our cars

wstar · 04-13-2009, 12:05 PM

FWIW, I've had zero CELs on my Berk HFCs, and they've been on the car now for about 1,400 miles. Those miles include a wide variety of driving styles as well as several OBD-II driving cycles (my little OBD-II unit shows me driving cycle progress). Obviously in the pictures we have, the Stillen unit doesn't have an extended tube for the O2 like the Berk one does, but I don't know what that really means in terms of results until we get some people independently testing them.

NIZMOZ · 04-13-2009, 02:44 PM

Quote:

Originally Posted by wstar

FWIW, I've had zero CELs on my Berk HFCs, and they've been on the car now for about 1,400 miles. Those miles include a wide variety of driving styles as well as several OBD-II driving cycles (my little OBD-II unit shows me driving cycle progress). Obviously in the pictures we have, the Stillen unit doesn't have an extended tube for the O2 like the Berk one does, but I don't know what that really means in terms of results until we get some people independently testing them.

Just give it time. Many didn't have the light show for thousands of miles. Mine showed after 3000 miles. Dunno what changed but it did.

wstar · 04-13-2009, 03:22 PM

Quote:

Originally Posted by NIZMOZ

Just give it time. Many didn't have the light show for thousands of miles. Mine showed after 3000 miles. Dunno what changed but it did.

What was the actual cause of your CEL that showed up 3k miles after the install though? Lots of things can cause P0420/P0430. Are you saying that you're really putting out too much emissions to the sensor, but it took 3k miles for the ECU to notice? I think that's unlikely. The 1,400 I've got on this setup now are more than enough for an OBD-II drive cycles to have picked up any real problem. What happened during those 3k miles? Other change to the car? Some kind of buildup in the cats or on the sensor itself? Heat changes?

04-13-2009, 12:05 PM	#6 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3595	FWIW, I've had zero CELs on my Berk HFCs, and they've been on the car now for about 1,400 miles. Those miles include a wide variety of driving styles as well as several OBD-II driving cycles (my little OBD-II unit shows me driving cycle progress). Obviously in the pictures we have, the Stillen unit doesn't have an extended tube for the O2 like the Berk one does, but I don't know what that really means in terms of results until we get some people independently testing them. gsg740 likes this. __________________ 7AT Track Car! Journal thread / Car setup details

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