Which would you prefer??

Ztoon · 07-20-2010, 11:23 PM

Stock have 400 cell count, F.I. 300, Berk 200. Lower the cell count, less restriction, higher flow rate, but a better chance of triggering a CEL. I've run with F.I. for about 8,000 mi. and have never had a CEL.

m4a1mustang · 07-20-2010, 11:23 PM

Quote:

Originally Posted by Ztoon

Stock have 400 cell count, F.I. 300, Berk 200. Lower the cell count, less restriction, higher flow rate, but a better chance of triggering a CEL. I've run with F.I. for about 8,000 mi. and have never had a CEL.

Both Berk and FI have a 300 cell count core, IIRC. The ERZ pipes have a 200 cell core.

Ztoon · 07-20-2010, 11:57 PM

Quote:

Originally Posted by m4a1mustang

Both Berk and FI have a 300 cell count core, IIRC. The ERZ pipes have a 200 cell core.

Product Information
Berk Technologies High Flow Cat Pipes Nissan 370Z 09+

The Berk Technology high flow catalytic converters are designed to be much less restrictive than stock, letting you unlock some of that lost power while still serving the function of converting harmful exhaust gasses into something less poisonous. The Berk Technology cats have a 200 cell count spiral wound metallic substrate. The substrate is the catalyst saturated honeycomb-like stuff inside the cat that the exhaust gasses pass though that does the cleaning of the exhaust stream. A metallic substrate has thinner walls with less cross sectional area than the ceramic material used for the honeycomb in most factory cats. Thinner walls mean larger internal passages in the honeycomb and thus less backpressure. Each passage is called a cell and a 200 cell count means that this honeycomb has large diameter cells for low restriction. Stock cats usually have cell counts in the 400 range and thicker walls on the cells making for much more flow restriction.

Berk Technology downpipes feature high quality all stainless construction, pre-cat bungs for wideband tuning sensors, gussets, proper rear o2 sensor attachment and big bore smooth mandrel bends for good flow. The stock catalytic converters came in at 10.5 lbs. each, while the Berk Technology High Flow Catalytic Converters came in at only 5.5 lbs. each, saving a surprising 10 lbs of performance robbing weight from the front of the 370Z.

m4a1mustang · 07-21-2010, 11:30 PM

Quote:

Originally Posted by Ztoon

Product Information
Berk Technologies High Flow Cat Pipes Nissan 370Z 09+

The Berk Technology high flow catalytic converters are designed to be much less restrictive than stock, letting you unlock some of that lost power while still serving the function of converting harmful exhaust gasses into something less poisonous. The Berk Technology cats have a 200 cell count spiral wound metallic substrate. The substrate is the catalyst saturated honeycomb-like stuff inside the cat that the exhaust gasses pass though that does the cleaning of the exhaust stream. A metallic substrate has thinner walls with less cross sectional area than the ceramic material used for the honeycomb in most factory cats. Thinner walls mean larger internal passages in the honeycomb and thus less backpressure. Each passage is called a cell and a 200 cell count means that this honeycomb has large diameter cells for low restriction. Stock cats usually have cell counts in the 400 range and thicker walls on the cells making for much more flow restriction.

Berk Technology downpipes feature high quality all stainless construction, pre-cat bungs for wideband tuning sensors, gussets, proper rear o2 sensor attachment and big bore smooth mandrel bends for good flow. The stock catalytic converters came in at 10.5 lbs. each, while the Berk Technology High Flow Catalytic Converters came in at only 5.5 lbs. each, saving a surprising 10 lbs of performance robbing weight from the front of the 370Z.

Trips · 07-21-2010, 12:03 AM

Quote:

Originally Posted by Ztoon

Stock have 400 cell count, F.I. 300, Berk 200. Lower the cell count, less restriction, higher flow rate, but a better chance of triggering a CEL. I've run with F.I. for about 8,000 mi. and have never had a CEL.

Same here no issues, knock on wood.

BOLIO 671 · 07-21-2010, 05:05 AM

I personally prefer the Berks...like mentioned they do have a lower cell count the F. I.

07-20-2010, 11:23 PM	#1 (permalink)
Ztoon Track Member Join Date: Aug 2009 Location: B.C. Posts: 578 Drives: '09 370a7 Rep Power: 26	Stock have 400 cell count, F.I. 300, Berk 200. Lower the cell count, less restriction, higher flow rate, but a better chance of triggering a CEL. I've run with F.I. for about 8,000 mi. and have never had a CEL. __________________ Stillen G3\|CBE\|ground kit, F.I. H.F.C., C.F. fangs\|mirrors\|pillars, Hotchkis, SSR Type-F, RE-11, UpRev, BC BR coilovers 15% tint, LED black hdlts, color match handles, Dynamat, tail lt. tint, Mines C.F. frt. lip\|rear spoiler, Amuse rear,skirts, vented fenders, c.f. vented hood, gloss blk. roof

07-21-2010, 05:05 AM	#6 (permalink)
BOLIO 671 A True Z Fanatic Join Date: Mar 2010 Location: GUAHAN Posts: 1,198 Drives: To & From then Back Rep Power: 3400	I personally prefer the Berks...like mentioned they do have a lower cell count the F. I. __________________ 2013 Nismo Z34 / FI TT #091 / IG: @lilzilla_z34

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