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-   Maintenance, Engine & Driveline Tech (https://www.revscene.net/forums/maintenance-engine-driveline-tech_190/)
-   -   aircare opendump, safc, cat (https://www.revscene.net/forums/617439-aircare-opendump-safc-cat.html)

momotaro 06-14-2010 01:37 PM

aircare opendump, safc, cat
 
do the inspectors only look for a cat? Will they care about my open dump tube?

Other questions:

I plan to remove my MBC and just run the waste gate spring at low boost (5psi). Should I then lean out the tune to reduce HC? I figure stock turbo cars must be 12:1 or so on boost, so how much of a problem is running "the correct" AFR on HC? Should I just tune the SAFC to "N/A" levels? Will this be safe on low boost with 94 octane mohawk?

I plan to tighen the spring on my BOV so I don't get rich on deceleration. I have the SAFC compensating now, but it still runs a little rich on decel. How much of a problem will this be?


What if I just happen to have a bunch of exhaust leaks at the mani, or DP? It will sound like ass, but will it get me though aircare?

Finally, I have a 5 year old "high flow" cat on there now. I figure there is not much catalyst left? Should I just rent a cat for the day, or will I get by with a good tune?

momotaro 06-14-2010 01:39 PM

Ps: car is 96 240sx with Ka-T running 370cc injectors, stock MAF, SAFC for tuning.

FeistyBearH22a 06-15-2010 07:22 PM

They wont care. They probably wont even know what it is. I guess it depends on where the end of the dump tube sits. THat said. I was able to make it with my old set up that had open to atmosphere wastegate dump tube.

momotaro 06-17-2010 09:32 AM

hc and CO super low. Just NOx high becuase no EGR. I think if I retard my timing I should be fine. they don't care about the open dump and they don't even push the car into boost. More just FYI for other searchers.

XtC-604 06-17-2010 10:45 AM

i love OBD2, no cel, and a visible cat = win

Akira@Rise 06-17-2010 04:37 PM

sounds like you need a new CAT to reduce NOx

momotaro 06-18-2010 09:47 AM

I have a new cat. I think I should be fine once I retard timing. I will post results once I go again.


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