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Old 10-07-2009, 08:58 PM   #13 (permalink)
mwebb
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Join Date: Jul 2009
Location: New York
Posts: 513

no nickname , it's just a car - '04 volkswagen golf tdi
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Quote:
Originally Posted by Chalupa102 View Post
MWebb; in case there is an issue with incorrect cam timing, like if there's timing advance or retard, how would that effect fuel economy?
it depends on more than a few things ,
imho
no one should ever tamper with cam timing .
but , there are always exceptions ... to every rule .

your 2005 corolla has variable cam timing , you should not frak with it.

in my experience whenever i encounter a cam timing error ,
performance is way off , the people are not concerned with fuel economy as much as they are concerned with poor driveability and the
CHECK MONEY light glowing orange in their instruments cluster .



having said that
i am tampering with cam timing on a geo metro ,
so far ,
my test results are not what i was hoping for - the screen cap above looks neat , but it is flawed ,amplitude values are low , the connector to the pressure transducer was leaking , however ,
it does show EVO occurs at 126 degrees after TDC and EVC occurs at 366 degrees after TDC .
with a stock OEM cam and stock OEM timing values .
that is already very advanced for a stock EVO value
typical values are closer to 150 degrees after TDC.

i have installed a 3tech economy cam and a +10 degree cam wheel , now that i have a new connector for the pressure transducer ...
i just need a spare hour or so to connect up ...
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