[TECH] 3a/JH HYbrid need help...please!

[jdbubb at ix.netcom.com (Dan Bubb)]

Well, on this issue I have to insist! (once again, I'm not EVERYONE!)
The knock box electronically provides all the advance the engine needs for
all conditions.
Using a JH mechanical advance distributor WILL give you roughly twice the
advance the engine should have.
Maybe the knock sensor is smart enough to back out some of this advance if
the engine is knocking, but your timing will not be optimal! (closer to
dismal!)
I'll bring a knock sensor distributor to Cincy and convince you if you
haven't changed over before then.
Dan
As an aside; most people on Vortex (EVERYONE!) seems to think that their
engine will be faster if they can just get more advance and more fuel! Where
do they get these ideas?


----- Original Message -----
From: "ATS - Patrick Bureau" <txrocco@sbcglobal.net>
To: "_Scirocco Mailing List" <scirocco-l@scirocco.org>
Sent: Monday, May 26, 2003 12:34 PM
Subject: [TECH] 3a/JH HYbrid need help...please!


> Dan, I understand what you are saying;
>
> The knock box uses it electrical inputs and vacuum line to adjust itself
to
> the crank position, now the vacuum of the knock has been set to the
booster
> port of the line that runs from the booster to the intake manifold, and
yeah
> the timing and idle has MUCHO improved.
>
> But I am not convinced I need a 3a distro, because well EVRYONE says you
can
> use a JH distro, and too many companies are selling the conversion kit
> adaptor plate and gears for the JH distro to be used with a 3a block.
>
> blocking the advance vacuum post on the distro may or may not be the right
> way of doing it, (though I would not see why we be using an KS vacuum
> advance AND a JH distro advance as well (then again maybe I should try to
> see what would come of it by reconnecting the JH distro into the TB port
> where it used to be before.
>
> IF any 3a/JH hybrid rocco-head has this setup please speak up, I have
right
> now the timing on +6 (timing light) and duty cycle at 29-39 % (26-31 is
too
> lean the car stalls on idle all the time)
>
> Pointers really appreciated at this point.
>
>
>
> ATS - Patrick Bureau - txrocco@sbcglobal.net
> Http://www.longcoeur.com/scirocco/
> ============================================
> '85 2.0L Prowler Orange Kamei X1 Rocco
> '85 1.8L Titian Red Rocco (daily driver)
> '98 4.0L Jeep Cherokee
> '91 7.3L F250 diesel Super cab,8 Ft box.
>
>
>
> =>-----Original Message-----
> =>From: scirocco-l-bounces@scirocco.org
> =>[mailto:scirocco-l-bounces@scirocco.org]On Behalf Of Dan Bubb
> =>Sent: Monday, May 26, 2003 6:19 AM
> =>To: ATS - Patrick Bureau; _Scirocco Mailing List
> =>Subject: KS distributor, was Re: 1.8 8v jh swap done......no power
> =>
> =>
> =>Patrick:
> =>If you're using the standard JH distributor, even with vacuum advance
> =>disabled, in conjunction with Knock Sensor ignition you'll have
> =>WAY too much
> =>advance above idle. The KS box needs a signal that is fixed relative to
> =>crankshaft position. All the advance is done electronically. The JH
> =>distributor will add 24 degrees of advance on top of the KS advance.
> =>Tell me I misread your statement and you're not using the JH
distributor.
> =>Just wanting your engine to be all it can be!
> =>Dan
>
>
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