AP stage 2 question

brex16 · 06-20-2005, 03:08 PM

Will flashing to Stage 2 help get rid of the stink on my catless exhaust?

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Amplified2000 · 06-20-2005, 03:19 PM

Nope.. nothing other than a catylitic converter will get rid of that smell. Look into a metal-substrate style high flow cat, most say that if flows almost as well as an open pipe.. maybee 5whp loss at most.

brex16 · 06-20-2005, 03:21 PM

yea, well i just thought that the stage 2 reflash would lean the engine out a bit. Correct me if im wrong but the stink isnt caused by removing the cats, its caused bc the engine is running rich and there is no cat there to obsorb it.

Amplified2000 · 06-20-2005, 04:20 PM

Quote:

Originally Posted by Cobb

Target A/F Ratios are mid 12's under load before the onset of boost. Under full
load by 4000 RPM the A/F Ratio will drop to mid 11:1 and gradually run richer as
RPM's increase ending at mid to high 10:1 A/F at redline.

That is taken from the map notes for the Stage 1 93oct flash

Quote:

Originally Posted by Cobb

Target A/F Ratios are mid 12's under load before the onset of boost. Under full
load by 3500 RPM the A/F Ratio will drop to mid 11:1 and gradually run richer as
RPM's increase ending at mid to high 10:1 A/F at redline.

That is from the notes for Stage 2 93oct...

As you can see they have the same target A/F ratios so going to stage 2 will not lean out the engine at all. Would you rather lean your engine out and risk detonation, install a high-flow cat with little to no change in power or drivablity, or contiue on with the stink?

For me the choice is pretty obvious.

Read thru the map notes Here to familiarize yourself with the differences between AP maps.

SkirtBoy · 06-22-2005, 12:30 PM

Quote:

Originally Posted by brex16

Will flashing to Stage 2 help get rid of the stink on my catless exhaust?

ChgoJay · 06-22-2005, 12:51 PM

Quote:

Originally Posted by SkirtBoy

Now its a party!!!!!!!!!

johsti · 06-22-2005, 01:10 PM

I'm running Cobb stage 2 with one hiflo cat, and I still get the catless stink until my cat gets hot (about half hour of driving or so). I plan on getting dyno tuned in the near future, and hope that will get rid of the smell.

ranger5oh · 06-22-2005, 01:15 PM

With a high flow, you should get no smell. Im running a stage 2 with some additional tuning, and I get no smell... even before the extra tuning.

If you have no cats, go get one. That will solve your probs.

AlboWRX · 06-22-2005, 01:26 PM

Wuss...

johsti · 06-22-2005, 01:47 PM

Quote:

With a high flow, you should get no smell.

http://forums.nasioc.com/forums/showthread.php?t=786318

Apparently, I'm not the only one.

06-20-2005, 03:08 PM	#1
brex16 Scooby Specialist Member#: 78703 Join Date: Jan 2005 Chapter/Region: MAIC Location: Ashburn Vehicle: 2004 WRB STi	AP stage 2 question Will flashing to Stage 2 help get rid of the stink on my catless exhaust? * Registered users of the site do not see these ads.

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06-20-2005, 03:19 PM	#2
Amplified2000 Scooby Specialist Member#: 86389 Join Date: May 2005 Chapter/Region: MWSOC Location: Cedar Falls, IA Vehicle: 2012 HyundaiVeloster Blue with salt accents	Nope.. nothing other than a catylitic converter will get rid of that smell. Look into a metal-substrate style high flow cat, most say that if flows almost as well as an open pipe.. maybee 5whp loss at most.

06-20-2005, 03:21 PM	#3
brex16 Scooby Specialist Member#: 78703 Join Date: Jan 2005 Chapter/Region: MAIC Location: Ashburn Vehicle: 2004 WRB STi	yea, well i just thought that the stage 2 reflash would lean the engine out a bit. Correct me if im wrong but the stink isnt caused by removing the cats, its caused bc the engine is running rich and there is no cat there to obsorb it.

06-22-2005, 01:10 PM	#7
johsti Scooby Specialist Member#: 36049 Join Date: Apr 2003 Chapter/Region: BAIC Location: San Jose Vehicle: 2004 WRX wagon Silver	I'm running Cobb stage 2 with one hiflo cat, and I still get the catless stink until my cat gets hot (about half hour of driving or so). I plan on getting dyno tuned in the near future, and hope that will get rid of the smell.

06-22-2005, 01:15 PM	#8
ranger5oh Scooby Specialist Member#: 77752 Join Date: Dec 2004 Location: St Louis Vehicle: 5Sti 2005 Sti OBP	With a high flow, you should get no smell. Im running a stage 2 with some additional tuning, and I get no smell... even before the extra tuning. If you have no cats, go get one. That will solve your probs.

06-22-2005, 01:26 PM	#9
AlboWRX Scooby Specialist Member#: 37719 Join Date: Jun 2003 Chapter/Region: MWSOC Location: Chicago, IL Vehicle: 2003 WRX	Wuss...