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Old 11-01-2004, 03:29 PM   #1
Matt Monson
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'73 914 and 2012 BRZ

Default Cobb Spicy cams passed emisions...

easily!
HC emissions:0.14 limit: 1.2
CO emissions:2.376limit: 20.0
CO2emissions:385 limit: NA
Noxemissions:0.216limit: 3.0

All numbers are in GPM. My set up as tested is:
Cobb spicy cams
Cobb CAI
Stromung Cat back
NGK PFR platinum dual tip plugs
Unorthodox pulley
Walbro 255l fuel pump
STOCK headers.

I removed my Cobb headers because of the CEL issue. I also had to replace my front 02 (A/R sensor) because it had worn out. I ran without the headers for a whole month with no CEL's. They did plug into my OBD-II port and there were no stored codes. This test was done on an AWD dyno. Since I can't get 89 octane in Co, I blended my gas. 8 gallons of 87 with 7.9 gallons of 91 octane. I also left the heater on so it would idle at 900 rpm instead the stock idle. This makes the lumpiness of the cams less noticeable, though it isn't a huge lumpiness to start with...
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Old 11-01-2004, 03:44 PM   #2
AJ711
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2 whls > 4 whls

Default

Now, put the headers back on and see how the numbers change. That might be an interesting test. There is plenty of room with the limits posed there.

Good to see my future plans won't be pissing too many tree huggers off.

AJ
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Old 11-01-2004, 03:50 PM   #3
HndaTch627
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hmmm, wonder if i can keep my car from throwing misfire codes with the stock exhaust on
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Old 11-01-2004, 04:08 PM   #4
Matt Monson
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'73 914 and 2012 BRZ

Default

AJ,
you are kidding right? Unless you want to pay me for my time and the fees. Plus I know that I will throw an 0420 CEL within 250mi of putting the headers back on, so it will fail the OBD-II part at that point...

Hndatch,
couldn't hurt to try...
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Old 11-01-2004, 04:26 PM   #5
AJ711
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2 whls > 4 whls

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Sorry, I'm a man of numbers. Good ol' analytical, black and white, numbers.

No issues there man with the time and effort, I fully understand.

I'd like to chew your ear at somepoint, and I'll PM you when I have everything in order. Your current build is where I'd like to take my car when the headgasket decides to stop working properly. Just a few questions for ya.

AJ
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Old 11-01-2004, 04:43 PM   #6
Matt Monson
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'73 914 and 2012 BRZ

Default

No worries. I am a man of numbers myself, which is why I got my car dyno'd as well as posted this info up here. I see so many threads asking for such things and so few replies.

And pm me anytime. I am always glad to chat...
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Old 11-01-2004, 05:27 PM   #7
Pat L.I.
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this is great news... i hope i pass NY
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Old 11-01-2004, 06:55 PM   #8
jamesfacts
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Quote:
Originally Posted by HndaTch627
hmmm, wonder if i can keep my car from throwing misfire codes with the stock exhaust on
You have emissions tests in IL?
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Old 11-01-2004, 07:21 PM   #9
CADesigns
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in suburbs and cities... ie. chicago yes, they are quite strict actually.
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Old 11-01-2004, 09:37 PM   #10
ilmaestro
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Quote:
Originally Posted by Matt Monson
easily!
HC emissions:0.14 limit: 1.2
CO emissions:2.376limit: 20.0
CO2emissions:385 limit: NA
Noxemissions:0.216limit: 3.0

All numbers are in GPM. My set up as tested is:
Cobb spicy cams
Cobb CAI
Stromung Cat back
NGK PFR platinum dual tip plugs
Unorthodox pulley
Walbro 255l fuel pump
STOCK headers.

I removed my Cobb headers because of the CEL issue. I also had to replace my front 02 (A/R sensor) because it had worn out. I ran without the headers for a whole month with no CEL's. They did plug into my OBD-II port and there were no stored codes. This test was done on an AWD dyno. Since I can't get 89 octane in Co, I blended my gas. 8 gallons of 87 with 7.9 gallons of 91 octane. I also left the heater on so it would idle at 900 rpm instead the stock idle. This makes the lumpiness of the cams less noticeable, though it isn't a huge lumpiness to start with...
But will it pass in CA... the maximum security prison of CARB states.
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Old 11-02-2004, 12:36 AM   #11
Penphoe
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2005 ABP LGT LTD BP6
00 Impreza RS GM6 RIP

Default

http://forums.nasioc.com/forums/show...light=Airscare

Here's a link to the emissions testing here in Greater Vancouver British Columbia, Canada. Our emissions testing is modeled after the testing in Cali meaning it's pretty tight.

Looks like your numbers would pass here in Vancouver!!!

My emissions testing (done back in August 2002 - max numbers haven't changed since then.)/Max allowable in Vancouver.

Hydrocarbons g/km: 0.0525/0.3700
Carbon Monoxide g/km: 4.2867/6.2100
Oxides of Nitrogen g/km: 0.4289/0.9300

These numbers are from my MY00 RS, with PDM intake/K&N Filter, and a Stromung catback.

LaterZ!
Darren!!
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Old 11-02-2004, 12:43 AM   #12
Penphoe
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Location: Burnaby, B.C., Canada
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2005 ABP LGT LTD BP6
00 Impreza RS GM6 RIP

Default

Dangit - need to convert the units - g/km != g/mi!! ARGH.

Where's my calculator...

LaterZ!
Darren!!
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Old 11-02-2004, 12:55 AM   #13
Penphoe
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00 Impreza RS GM6 RIP

Default unit conversions....

Quote:
Originally Posted by Penphoe

My emissions testing (done back in August 2002 - max numbers haven't changed since then.)/Max allowable in Vancouver.

Hydrocarbons g/km: 0.0525/0.3700
Carbon Monoxide g/km: 4.2867/6.2100
Oxides of Nitrogen g/km: 0.4289/0.9300

Okay, since you guys use units in miles, and up here in Canada we use kilometers, I'll be nice and do the unit conversions for you.

For reference, 1km ~= 0.621mi conversion units will be:
1.61km/mi.

Hydrocarbons (g/mi) 0.0845/0.5957
Carbon Monoxide (g/mi) 4.9769/9.9981
Oxides of Nitrogen (g/mi) 0.6905/1.4973

I hope my conversion is correct and these numbers are accurate. They seem to be right to me. Vancouver has very stringent emissions testing.

LaterZ!
Darren!!
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Old 11-02-2004, 03:34 AM   #14
HndaTch627
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Default

Quote:
Originally Posted by americanyouth
You have emissions tests in IL?
california based IM240 emissions testing, MIL or DTC stored=you fail

and it's for the Chicago Metro Area maily, i'm not even sure Peoria or springfield have it, with 11million people in IL and 6mil of those live in the chicago metro area we get stuck making up for the rest of the states poor emissions standards.

Jeremy
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Old 11-02-2004, 12:35 PM   #15
Matt Monson
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Location: Teh Ghetto Garage, CO
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99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

http://www.epa.gov/otaq/stds-ld.htm
Looks like it may pass in CA as well, but it is very close...
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Old 11-02-2004, 03:00 PM   #16
msm98lw
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Matt, any idea how much power you lost when you put the stock headers back on. In August you dynoed 158 with the Cobb headers.

Any word on Cobb fixing the CEL problem?
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Old 11-02-2004, 03:25 PM   #17
HndaTch627
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'09 Concours 14 ABS Black

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the CEL problem is not a fixable issue, headers just lose too much heat and blow out the primary O2's, the only fix is double wall steel w/ insulation(like the stock exhaust manifold).

as for the P0420, you'll never fix that with headers and an aftermarket high flow
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Old 11-02-2004, 11:35 PM   #18
ttboy19
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MAtt- quick question: what is the difference b/t street cams and spicy cams from COBB? They're both the same price. I intend on ordering soon, but not sure which to get. (I'm staying N/A)
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Old 11-03-2004, 04:56 AM   #19
XRayHipp
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2.5 Ounces to Freedom

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uhh... move to floriduh
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Old 11-04-2004, 02:15 AM   #20
HndaTch627
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'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

Quote:
Originally Posted by ttboy19
MAtt- quick question: what is the difference b/t street cams and spicy cams from COBB? They're both the same price. I intend on ordering soon, but not sure which to get. (I'm staying N/A)
Street Cams are a very subtle upgrade, the Spicy cams are rather wild, with the spicy cams they rec replacing valve springs and retainers just because of the rate of valve lift/closing. Stock springs and retainers just can't handle it.

Jeremy
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Old 11-04-2004, 11:47 AM   #21
Matt Monson
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99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

The spicy cams really aren't that "wild". My idle is a little lumpy, but not really bad like a race cam. I do not have upgraded springs, yet. Without a raised redline it really is not required.

BTW,
put the headers back on. It took 71 miles until good old 0420 came back...
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Old 11-04-2004, 12:53 PM   #22
Boost-Free Subee
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White

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emissions? what are those? (just a little new hampshire humor)
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