yeah.. I get that. It's just that for ANY stock engine to have more than
10 degrees initial is unusual.. sure they seem to run better, but when
the total is too high bad things will happen in due course...
On 8/14/2017 7:33 AM, BJ8Healeys wrote:
>
> Dave, I'm not the one having the problem and asking the question; but
> I was responding to your statement that the timing is set to 6? @ 750
> RPM, which does not agree with what is published in the BMC workshop
> manual for the Mk III engine (see attached). My Glenn's AUSTIN
> AUSTIN-HEALEY REPAIR AND TUNEUP GUIDE (copyright 1965, and also says
> CHILTON 1432 on the spine) gives the same numbers as the BMC manual.
> I do understand what you mean about the advance (I have a Mallory
> Dual-Point distributor with mechanical advance only), but questioned
> where your numbers came from.
>
> Steve Byers
>
> HBJ8L/36666
>
> BJ8 Registry
>
> AHCA Delegate at Large
>
> Havelock, NC
>
> -----Original Message-----
> From: David Porter [mailto:frogeye at porterscustom.com]
> Sent: Monday, August 14, 2017 8:53 AM
> To: BJ8Healeys; healeys at autox.team.net
> Subject: Re: [Healeys] Carb Adjustment Help Requested - BJ8 MkIII
>
> Steve, my Glenn's book shows the dist as 40966A/B with centrifugal
> advance starting at 500RPM with 7.5 degrees, max centrifugal adds 19
> more degrees at 3200RPM plus another 8 for the vacuum advance giving a
> total max of 34.5 degrees. Thus if at 3200RPM your total is more than
>
> 34.5 back off the initial. If your strobe light won't allow you to
> calculate total, get one that will. ;~) Healey engines are very good
> at not pinging audibly. Can't count the number of engines I've seen
> with damaged ring lands from too much advance.
>
> On 8/13/2017 6:41 PM, BJ8Healeys wrote:
>
> > Dave, are you sure about those numbers? I believe the manual
>
> > specifies 10 BTDC static and 15 BTDC @ 600 RPM.
>
> >
>
> > Steve Byers
>
> > HBJ8L/36666
>
> > BJ8 Registry
>
> > AHCA Delegate at Large
>
> > Havelock, NC
>
> >
>
> >
>
> > -----Original Message-----
>
> > From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of
>
> > David Porter
>
> > Sent: Sunday, August 13, 2017 7:20 PM
>
>
> > Subject: Re: [Healeys] Carb Adjustment Help Requested - BJ8 MkIII
>
> >
>
> > what are the compression numbers? Timing is set at 750RPM and 6
>
> > degrees BTDC. Is it better or worse with chokes engaged? DP
>
> >
>
> >
>
> >
>
> > On 8/13/2017 3:23 PM, Bob England wrote:
>
> >> I've had a rough idle in the car since we picked it up in May and it
>
> >> seems to have gotten worse ever so slightly since then.
>
> >>
>
> >> I've putzed around trying the easy stuff and finally got the bullet
>
> >> and pulled the carbs yesterday (that was fun!) as one of the carb
>
> >> pistons was sticking ever so slightly. Stripped the carbs except for
>
> >> the throttle
>
> > shaft
>
> >> and found the floats were set a bit low. Put it all back together
>
> >> and
>
> > still
>
> >> having an issue as she is running quite rich, hence the call for help.
>
> >>
>
> >> Car: late '64 build BJ8 MkIII
>
> >> Carbs : HD8 (I think they were new about 15 years ago - not original
>
> >> to car).
>
> >> Cam : Dennis Welch DWR-1 (installed about 15 years ago).
>
> >> Distributor : stock with Petronix Ignitor (Petronix installed last
>
> >> weekend in the hopes it would help). New rotor.
>
> >> Coil : Lucas Sportcoil
>
> >> Plugs : new Autolite gapped at 25 (installed a couple of weekends
>
> >> ago) Timing : 15 degrees with strobe (my attempt at static timing was
>
> >> a dismal failure!).
>
> >>
>
> >> I set the carbs as per the manual - 3.5 turns open on the idle trim
>
> >> screws and 2.5 turn rich on the jet adjusting screw. Fast idle
>
> >> adjusting screw completely off of the cam lobe.
>
> >>
>
> >> The best I can get it is with the jets totally lean (i.e. not sitting
>
> >> on
>
> > the
>
> >> cam lobe) and the fast idle screws setting the idle speed. Idle trim
>
> > screws
>
> >> backed way out with little impact on idle. Carbs are still running
> rich.
>
> >>
>
> >> I think I have memorized the adjustment procedure from the manuals I
>
> >> read them so many time - (Bentley, BMC, and Haynes), and Norman
>
> >> Nock's
>
> > wonderful
>
> >> collection of papers.
>
> >>
>
> >> Should I be going to a leaner needle in the carbs? Or am I just
>
> >> screwing
>
> > up
>
> >> somewhere? This is my first attempt at adjusting SU's and I'm not
>
> >> too
>
> > happy
>
> >> with what I have done so far.
>
> >>
>
> >> Any and all suggestions appreciated (except maybe if I have to yank
>
> >> the carbs again).
>
> >>
>
> >> Thanks in advance.
>
> >>
>
> >> Bob England
>
> >>
>
> >> _______________________________________________
>
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>
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>
> >>
>
>
> >> http://autox.team.net/mailman/listinfo/healeys
>
> >>
>
> >> Unsubscribe/Manage:
>
> > http://autox.team.net/mailman/options/healeys/frogeye at porterscustom.co
>
> > m
>
> >>
>
> >>
>
> --
>
> Dave Porter Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM
>
> 87107 505-352-1378 Go HERE: my world www.porterbikes.com/
> <http://www.porterbikes.com/>
>
> ---
>
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>
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>
>
>
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>
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>
--
Dave Porter Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM
87107 505-352-1378 Go HERE: my world www.porterbikes.com/
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