Re: question: ignition advance and CIS-E

["Chris DeLong" <green536@hotmail.com>]

just for record Foxes have CIS-E without a knock sensor. So do some Jettas 
and Golfs

>
>The way I understand it , CIS-E runs a knock box which serves to
>retard timing if the knock sensor detects knock.  So basically, the
>engine management system runs full advance until knock is detected,
>and then timing is retarded until no more knocking.  Correct?  With
>the stock 6 degrees of advance, the system would run a MAX 6 degrees
>of advance until/if knock is detected, correct?
>
>If I set the ignition timing to 6+3 degrees advance, for a total of 9
>degrees advance (from top dead center on flywheel), or, in other
>words, 3 degrees advance more than stock, the CIS-E system would try
>to run at 6+3 until/if knock is sensed and then it would retard timing
>until no more knock.  Correct?
>
>Anyone running 6+3 degrees on their 16vs?  Is there any advantage?  I
>was running a lot of advance on my old 8v with the Euro distributor
>and I like what it did for the down low power.  The great thing about
>the Euro distributor was that it didn't kill my top end.
>
>what is the verdict on 16vs?  I have a 2.0L bottom end, euro intake,
>performance exhaust and will be slapping a 50mm intake on.  I was
>thinking about advancing the timing a little bit to accomodate the
>small loss of low end torque due to the 50mm intake.
>
>Since I have a timing gun I can do this fairly easily.  Too bad I
>don't have a G-Tech, or I would be able to post some #rs to the list.
>
>Thanks,
>
>Victor
>
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Chris DeLong
ICQ#45030867
Seattle, WA USA
'80 16V Rag
'78 Scirocco (for sale)
'82 GLI
'84 Jetta Diesel (for sale)
'80 Jetta
'80 'Vert
'65 Bus (ugly, but good for campin' W/toaster oven)
'61 17 Window


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