PRE Stepped Header - Page 3 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

evan · 02-20-2014, 11:44 AM

Just popped a P0420 (catalyst efficiency below threshold) last night. Get that code ironed out your tune folks! :0) Header guys.. I'm talking to you. I've got both cats, but exhaust flow must be too fast for the catalyst to heat up properly.

NickFRS · 02-22-2014, 12:29 AM

Quote:

Originally Posted by evan

Just popped a P0420 (catalyst efficiency below threshold) last night. Get that code ironed out your tune folks! :0) Header guys.. I'm talking to you. I've got both cats, but exhaust flow must be too fast for the catalyst to heat up properly.

This code usually pops if you are catless. If you have a cat that is concerning ahaha.

evan · 02-22-2014, 02:06 PM

Quote:

Originally Posted by NickFRS

This code usually pops if you are catless. If you have a cat that is concerning ahaha.

Cat in header downpipe is getting swapped anyway for different reasons, so we will see..

Sent from my Nexus Five, I'm Alive!

evan · 02-22-2014, 08:36 PM

Quote:

Originally Posted by NickFRS

This code usually pops if you are catless. If you have a cat that is concerning ahaha.

Blame it on the meh, meh, meh, meh, meh, methanol..

https://web.anl.gov/PCS/acsfuel/prep...04-75_0059.pdf

Science is awesome kids

Sent from my Nexus Five, I'm Alive!

NickFRS · 02-23-2014, 03:12 AM

Quote:

Originally Posted by evan

Blame it on the meh, meh, meh, meh, meh, methanol..

https://web.anl.gov/PCS/acsfuel/prep...04-75_0059.pdf

Science is awesome kids

Sent from my Nexus Five, I'm Alive!

I know how meth works. I also have seen meth on cars with stock cats with no issues. Just saying.

evan · 02-23-2014, 11:00 AM

Quote:

Originally Posted by NickFRS

I know how meth works. I also have seen meth on cars with stock cats with no issues. Just saying.

I have no doubts that you do.

Since I don't have stock cats, likely I'll need an o2 spacer on the secondary bank. The hi-flow cat may be disrupting normal emissions operation. I am not ready to disable P0420 since I want to stay compliant. I still don't think the cat on the header downpipe is heating up enough. It's not a big deal really. For those purchasing the PRE header, you'll probably end up disabling P0420.

Sent from my Nexus Five, I'm Alive!

NickFRS · 02-23-2014, 11:22 AM

Quote:

Originally Posted by evan

I have no doubts that you do.

Since I don't have stock cats, likely I'll need an o2 spacer on the secondary bank. The hi-flow cat may be disrupting normal emissions operation. I am not ready to disable P0420 since I want to stay compliant. I still don't think the cat on the header downpipe is heating up enough. It's not a big deal really. For those purchasing the PRE header, you'll probably end up disabling P0420.

Sent from my Nexus Five, I'm Alive!

Just go catless!

evan · 02-23-2014, 11:33 AM

Quote:

Originally Posted by NickFRS

Just go catless!

Too loud and stinky!

Sent from my Nexus Five, I'm Alive!

PRE-Erich · 03-05-2014, 05:09 PM

Btw, Evan, on pump + meth your car made 276whp today. I'm not a huge fan of the injectors but it drives really good on the pump tune. Draining the gas and getting ready to tune on e85. The corn tune shound be even smoother because it will allow those port injectors to run at a more efficient pulse width.

evan · 03-05-2014, 05:24 PM

Quote:

Originally Posted by PRE-Erich

Btw, Evan, on pump + meth your car made 276whp today. I'm not a huge fan of the injectors but it drives really good on the pump tune. Draining the gas and getting ready to tune on e85. The corn tune shound be even smoother because it will allow those port injectors to run at a more efficient pulse width.

Thank you. We didn't add power adders, so the power on pump is consistent with the last run on stock injectors and pump, which makes me happy. 10-4 on the injectors.. They were meant for the additional scalability to support corn juice and future power adders.

I plan to run this thing 95% of the time on E85, so can't wait to see results for that!

Good job Erich!

Eat your vegetables..

Jmonty · 03-05-2014, 11:35 PM

Even,

car sounded great good luck on the corn power!

Erich adjusted my tune so no more crazy cold start ups

anyone with a BRZedit tune should go see Erich for an update

plan to get before and after videos posted soon

OmarGC · 03-06-2014, 12:13 AM

I want this exhaust manifold...

PRE-Erich · 03-06-2014, 04:08 PM

Quote:

Originally Posted by Jmonty

Even,

car sounded great good luck on the corn power!

Erich adjusted my tune so no more crazy cold start ups

anyone with a BRZedit tune should go see Erich for an update

plan to get before and after videos posted soon

So was it better this morning on a true cold start? This is something I will happily do for any of our catless or high flow catted BRZ-edit customers. I have most of your maps still from the transition.

Jmonty · 03-06-2014, 05:36 PM

Yes it was better this morning , not bad at all

02-20-2014, 11:44 AM	#29
evan Senior Member Join Date: Dec 2013 Drives: fr-s Location: pdx Posts: 546 Thanks: 396 Thanked 202 Times in 129 Posts Mentioned: 30 Post(s)	Just popped a P0420 (catalyst efficiency below threshold) last night. Get that code ironed out your tune folks! :0) Header guys.. I'm talking to you. I've got both cats, but exhaust flow must be too fast for the catalyst to heat up properly. Last edited by evan; 02-20-2014 at 12:17 PM.

03-06-2014, 12:13 AM	#40
OmarGC My FR-S has 5 gears Join Date: Aug 2012 Drives: FRS/280z/Tundra Location: St. Louis Posts: 1,993 Thanks: 626 Thanked 1,065 Times in 572 Posts Mentioned: 49 Post(s)	I want this exhaust manifold... __________________ Omar GC 2JZ - 6870 - stock block - 1000whp? Instagram: 2jzus

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Nameless Performance Equal Length Stepped Header	Jason@Nameless	Engine, Exhaust, Transmission	4525	11-21-2022 05:38 PM
RevWorks UEL Header + Nameless Catted Front Pipe VS Stock Gutted Header + FP	NickFRS	Engine, Exhaust, Transmission	44	04-19-2014 05:42 PM
Top Gear Solutions\| HKS Header \|Borla EL & UEL Headers\| Agency Power Header\| + MORE!	TopGearSolutions	Engine, Exhaust, Bolt-Ons	82	04-14-2014 08:16 PM
Wanted: UEL header with Perrin header back and tune.	skye67	Engine, Exhaust, Transmission	7	12-21-2013 10:34 PM
Tri-Y (4-2-1) stepped vs. UEL 4-1	solidONE	Engine, Exhaust, Transmission	26	10-01-2013 01:27 AM

03-05-2014, 05:09 PM	#37
PRE-Erich Member Join Date: Jun 2013 Drives: 1981 Toyota Corolla TE72 Location: Portland, Oregon Posts: 23 Thanks: 1 Thanked 13 Times in 9 Posts Mentioned: 4 Post(s)	Btw, Evan, on pump + meth your car made 276whp today. I'm not a huge fan of the injectors but it drives really good on the pump tune. Draining the gas and getting ready to tune on e85. The corn tune shound be even smoother because it will allow those port injectors to run at a more efficient pulse width.

03-05-2014, 11:35 PM	#39
Jmonty Realtor/ Principal Broker Join Date: Oct 2013 Drives: JRSC BRZ GBS LTD 2010 LTD Outback Location: Salem Oregon Posts: 899 Thanks: 806 Thanked 218 Times in 178 Posts Mentioned: 31 Post(s)	Even, car sounded great good luck on the corn power! Erich adjusted my tune so no more crazy cold start ups anyone with a BRZedit tune should go see Erich for an update plan to get before and after videos posted soon

03-06-2014, 05:36 PM	#42
Jmonty Realtor/ Principal Broker Join Date: Oct 2013 Drives: JRSC BRZ GBS LTD 2010 LTD Outback Location: Salem Oregon Posts: 899 Thanks: 806 Thanked 218 Times in 178 Posts Mentioned: 31 Post(s)	Yes it was better this morning , not bad at all

User Name		Remember Me?
Password