KV engine setup

[mdg3369 at newtsplace.com]

If you take a look at any of the progressive throttle bodies from an 80s
VAG product, it becomes apparent that the vac advance does nothing at all
at idle. If you don't believe me check for yourself, look at the throttle
body, and you'll see that the port for the vac advance canister is on the
atmospheric side of the throttle plate at idle. Crack the throttle a tad,
and it is on the vacuum side of the throttle plate, and you get vac
advance.
This is all of course dependant on the assumption that your throttle stop
hasn't been monkied with.
HTH someone
Mike


> Message: 4
> From: "rob hod" <rob3 at hod3.fsnet.co.uk>
> To: <JShadzi at aol.com>, <quattro at audifans.com>
> Subject: Re: KV engine setup
> Date: Wed, 1 Oct 2003 20:49:22 +0100
>
>    You've hit the nail on the head. The vacuum advance is precisely for a
> part throttle situation, and does most of its work when there is a higher
> vacuum condition than idle, Whether is does much *at* idle is a moot point
> in this application, given the differing specs which mihnea and I have got
> independently from different sources and which seem to indicate there
> isn't
> any vacuum advance at idle.
>
>  The other possibility is that one of the specs that we've read is
> incorrect
> and that indeed there is an element of vaccum advance at idle. For now
> I've
> an open mind. Perhaps Phil could report back his findings when he's done.
>
>  Just trying to help someone's query by giving some pertinent info. Thats
> all.
>
>
> rob
> ----- Original Message -----
> From: <JShadzi at aol.com>
> To: ""rob hod"" <rob3 at hod3.fsnet.co.uk>; <quattro at audifans.com>
> Sent: Wednesday, October 01, 2003 7:20 PM
> Subject: Re: KV engine setup
>
>
>> The vacuum advance most definitely does something at idle, other than
> deceleration, there is not other higher vacuum condition than idle.
>>
>> Javad
>>
>> > Interesting. The good ol' Haynes manual specifies for the KV
>> >
>> > 'vacuum hose on, 17 to 19 degrees BTDC at idle'.
>> >
>> > Looks like the vacuum advance is doing nothing at idle. Which is
>> >reasonable. As Mihnea says, this is CIS, not CIS-E, no cat,no lambda,
>> no
>> >duty cycle. Not much to go wrong and 136bhp bone stock.
>> >
>> >
>> >rob