Symptoms of possible utec failure.
01-22-2008, 09:35 PM
#21
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Originally Posted by superchargedg
We figuerd it out...the original cat convertors burnt up and caused all the smoke and they also fried my wideband o2 sensor.I have experienced all kinds of problems in my 30 years in this business but have never seen or smelled a cat convertor burn up like these did.
So now im gonna get a new wideband sensor and 2 new post o2 sensors just to be sure and replace them........see you next week for the higher boost tune dave.
So now im gonna get a new wideband sensor and 2 new post o2 sensors just to be sure and replace them........see you next week for the higher boost tune dave.
When you called and told me everthing that was going on this was the only thing that made sense.
01-22-2008, 09:36 PM
#22
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Originally Posted by rcdash
The cats likely run much hotter than your turbos. Cats burning up is a symptom of running rich, and not so much being subjected to heat from a turbo per se. Of course, when you have a turbo, you run a little richer than you usually would. Metal cores survive FI better (if you decide to pursue cats)...
EDIT: I don't know anything about your build, but if you take the cats out, you may want to examine the tune (AFR).
EDIT: I don't know anything about your build, but if you take the cats out, you may want to examine the tune (AFR).
01-23-2008, 06:01 PM
#24
Originally Posted by DaveFunction2ND
He's at ~11.5:1. Its more of an issue that the auto is in boost almost ALL the time.
01-23-2008, 06:38 PM
#25
Originally Posted by rcdash
Other auto high performance turbo cars (Porsche, the new GTR) somehow manage to run with cats. I'm hoping it's possible without losing too much power, cause I'm going to commit to the move from test pipes to custom cats (200 cell metal cores w/ 3.5" inlet/outlet welded into APS test pipes)...
It will be interesting to see what AF ratio that GTR is dialed to.
Last edited by Sharif@Forged; 01-23-2008 at 06:43 PM.
01-23-2008, 07:16 PM
#26
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See it in this thread. https://my350z.com/forum/showthread.php?t=326073
Originally Posted by Sharif@Forged
It will be interesting to see what AF ratio that GTR is dialed to.
Last edited by theking; 01-23-2008 at 07:18 PM.
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