KV engine setup

[JShadzi at aol.com]

Rob, maybe you didn't read my entire post, so I'm copying it again for you to read:

 "The vacuum advance most definitely does something at idle, other than
 deceleration, there is not other higher vacuum condition than idle.

 Javad"

You make this assumption:  Your source of information contradicted Mihnea's, so you assumed that the vacuum advance does nothing at idle?  Is this good logic??

Unless your Euro CIS setups have some circuit to isolate vacuum to the cannister at idle, then the cannister is adding full vacuum advance to the distributor.  Part throttle vacuum is slightly higher than at idle typically, but in no way is there no vacuum present.  Also, in manuals I've seen, they ask that the vacuum signal to the dist be removed when setting base idle, so the fact that you have found information contradicting what Mihnea posted doesn't necessarily mean you've found the best solution.

In the US, the JT setup in the CISE cars calls for 6d with vacuum disconnected, with vacuum connected that jumps to about 18d, this is all at idle.

Javad


>   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
>> >----- Original Message ----- > Message: 9
>> >> Date: Tue, 30 Sep 2003 21:52:12 +0200
>> >> To: JShadzi at aol.com, quattro at isham-research.com, urq at audifans.com,
>> >> quattro at audifans.com
>> >> From: Mihnea Cotet <mik at info.fundp.ac.be>
>> >> Subject: Re: KV engine setup
>> >>
>> >> The KV engine is a basic CIS with vacuum advance, the correct specs
>> >> according to the factory repair manual are 18 degree BTDC with vacuum
>> >> disconnected, CO should be 1 +/- 0.2% at idle. This engine has no cat.
>> >>
>> >> HTH,
>> >>
>> >> Mihnea
>> >>
>> >> At 15:23 30/09/2003 -0400, JShadzi at aol.com wrote:
>> >> >--
>> >> >[ Picked text/plain from multipart/alternative ]
>> >> >Phil, is that the basic CISE system with vacuum advance distributor?
>If
>> >so,
>> >> >close off vacuum signal to dist and set base timing to 6d BTDC,
>reconnect
>> >> >vacuum signal, also ensure that the vacuum advance cannister is not
>> >> >leaking, which
>> >> >it likely is.
>> >> >
>> >> >Javad
>> >> >
>> >> >In a message dated 9/30/2003 11:59:43 AM Pacific Standard Time,
>> >> >quattro at isham-research.com writes:
>> >> >Anyone know the official way to set up the timing on a KV?
>> >> >
>> >> >--
>> >> > Phil Payne
>> >> > http://www.isham-research.com
>> >> > +44 7785 302 803
>> >> > +49 173 6242039
>> >>
>> >>
>> >>
>> >
>> >
>>
>
>