Stillen HFC vs. BERK HFC

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	#1 (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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