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Old 05-07-2008, 02:18 PM   #1
Infamous1
Scooby Newbie
 
Member#: 133692
Join Date: Nov 2006
Chapter/Region: SCIC
Location: In So Cal tuning YOU!!! ;)
Vehicle:
2003 Chevy Z06
Black/Black

Default Too much AVCS advance?

So I finally got around to install my ported manifolds and X-pipe and notice a bit of white residue in the manifolds. First thing I though was d@mn idiots at the race gas shop gave me some leaded gas. O2 sensor also was white and a bit worn. So I check coolant, oil, plugs, vaccuum and everything checkout fine also never blow any smoke . I have a wideband and constantly monitor AFR's, under WOT no higher than 11.1. So I consulted with a buddy of mine and he thinks it is unburnt fuel in the headers burning up and leaving the residue, thoughts? I am currently running 33 degrees of ACVS advance.
Setup:
2006 LGT
Xo2 Racing FMIC
Xo2 Racing CBE

Megan racing Downpipe
Gutted OEM Uppipe
LGT TGV Deletes
APS hard pipe turbo inlet
K & N Typhoon intake
Prodive 3 port EBCS
Greddy Type S BOV(recirculated)
NGK LFR7AIX sparkplugs (1 step colder)
Ported Exhaust manifolds and X-pipe
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Old 05-08-2008, 01:29 AM   #2
modaddict
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Location: Pasco, WA
Vehicle:
sold to a good bud
awaiting next car

Default

wait, what's your question?

You're asking if you're running too much avcs advance? No.

the white residue is from racegas? Yes.
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Old 05-08-2008, 10:39 AM   #3
Infamous1
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Join Date: Nov 2006
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Vehicle:
2003 Chevy Z06
Black/Black

Default

Quote:
Originally Posted by modaddict View Post
wait, what's your question?

You're asking if you're running too much avcs advance? No.

the white residue is from racegas? Yes.

Yeah that answered it, my tank before last was racegas. Anyways EGT probe goes in this week, for good measure.
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