[Mgs] . Re: H4 or HS4 carbs on an MGA 1600 and Electronic Ignition or Points (Robert J. Guinness)
Charley & Peggy Robinson
ccrobins at ktc.com
Thu Jan 11 16:06:52 MST 2018
Wow, that's a lot of miles on that little long-stroke 4-banger!
CR
On 1/11/2018 10:15 AM, Joel Martin via Mgs wrote:
> Robert
>
> The aftermarket distributors are prone to quality control issues and I
> would avoid them if possible. I would recommend sending your original
> distributor to Advanced and having it rebuilt and install a Petronix
> module instead of the points. (Petronix verses points, always a
> difference of opinion) Keep a new set of points, rotor and condensor
> in the car in case the Petronix fails. It has not happened to me but
> best to be prepared - this will at least get you going again.
>
> I am the original owner of a 1973 MGB with over 223,000 miles on the
> car. The next thing we did was send the HIF4 carbs to Mr. Johnson in
> OK and had them rebuilt with new throttle shafts - they were leaking.
> Spray some carb cleaner on the throttle shafts while the car is
> running. If RPM's change - shafts are leaking. New coil, spark plugs
> and plug wires and you should be all set.
>
> With these changes, the car starts on the first turn of key, runs and
> idles excellent. About 8,000 miles since the above changes were
> made. I wish we had done this years ago - made a big difference for
> around $500 total.
>
> Best of luck.
>
> Joel Martin
>
>
> ------------------------------------------------------------------------
> *From:* "mgs-request at autox.team.net" <mgs-request at autox.team.net>
> *To:* mgs at autox.team.net
> *Sent:* Wednesday, January 10, 2018 5:03 PM
> *Subject:* Mgs Digest, Vol 128, Issue 4
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> 1. H4 or HS4 carbs on an MGA 1600 and Electronic Ignition or
> Points (Charley & Peggy Robinson)Re:
> 2. Re: H4 or HS4 carbs on an MGA 1600 and Electronic Ignition or
> Points (Robert J. Guinness)
> 3. Re: H4 or HS4 carbs on an MGA 1600 and Electronic Ignition
> (Eric Russell)
> 4. Re: H4 or HS4 carbs on an MGA 1600 and Electronic Ignition or
> Points (John DiFede)
> 5. Re: H4 or HS4 carbs on an MGA 1600 and Electronic Ignition or
> Points (Osborne, Paul)
> 6. Re: H4 or HS4 carbs on an MGA 1600 and Electronic Ignition
> (Andrew Lundgren)
> 7. Re: H4 or HS4 carbs on an MGA 1600 and Electronic Ignition or
> Points (PaulHunt73)
> 8. Re: H4 or HS4 carbs on an MGA 1600 and Electronic Ignition or
> Points (Robert J. Guinness)
> 9. Re: H4 or HS4 carbs on an MGA 1600 and Electronic Ignition or
> Points (Charley & Peggy Robinson)
> How well does the engine run? If it runs well I wouldn't mess with it.
>
> CR
>
> On 1/9/2018 10:52 AM, Robert J. Guinness via Mgs wrote:
>> I bought an MGA 1600 with HS4 carbs conversion and a crane fireball
>> electronic ignition. I would like to go back to a stock set up.
>> What are the *significant* pros and cons for doing so, for example
>> power (rather than ease of maintenance)? I know the H4s, but I am
>> unfamiliar with working with HS4s (same with points vs electronic
>> ignition).
>> --
>> e-mail signature
>> Robert Guinness
>>
>>
>> _______________________________________________
>>
>> Mgs at autox.team.net <mailto:Mgs at autox.team.net>
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>
> It ran great for @400 miles on a run from Raleigh, NC to just North of
> Caryville, TN in the New Years Eve subzero weather, then quit. Would
> fade and then rev back up (until it didn't anymore). Probably a
> combination of fuel pump, bad fuel, coil, and voltage regulator
> issues. Man was it cold on that mountain waiting for AAA!
>
> On 1/9/2018 2:40 PM, Charley & Peggy Robinson wrote:
>> How well does the engine run? If it runs well I wouldn't mess with it.
>>
>> CR
>>
>> On 1/9/2018 10:52 AM, Robert J. Guinness via Mgs wrote:
>>> I bought an MGA 1600 with HS4 carbs conversion and a crane fireball
>>> electronic ignition. I would like to go back to a stock set up.
>>> What are the *significant* pros and cons for doing so, for example
>>> power (rather than ease of maintenance)? I know the H4s, but I am
>>> unfamiliar with working with HS4s (same with points vs electronic
>>> ignition).
>>> --
>>> e-mail signature
>>> Robert Guinness
>>>
>>>
>>> _______________________________________________
>>>
>>> Mgs at autox.team.net <mailto:Mgs at autox.team.net>
>>> Donate:http://www.team.net/donate.html
>>> Suggested annual donation $12.75
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>>> Unsubscribe:http://autox.team.net/mailman/options/mgs/ccrobins@ktc.com
>>
>
> --
> e-mail signature
> Robert Guinness
> I can't imagine any significant power difference between H4 & HS4 carbs.
> The throats are the same. I suspect the HS4 carbs will be a little less
> leak-prone. (the rubber grommets on the H4 float bowl tend to be a weak
> point, IME) I don't think HS4's came with the decel valve in the
> throttle plate - if they did that could be a small difference in power.
>
> I am not a fan of replacement electronic ignition systems. When they
> work they work just fine. But when they don't work, replacement of the
> entire unit seems like the only option. With points, an occasional
> tune-up keeps it working fine. And if something does go wrong when
> you're on the road, a tiny kit with spare points & condensor is almost
> surely all you'd need to get going again.
>
> Eric Russell
> Mebane, NC
> > Date: Tue, 9 Jan 2018 10:52:13 -0600
> > From: "Robert J. Guinness" <guinness at stclegal.com
> <mailto:guinness at stclegal.com>>
> > To: mgs at autox.team.net <mailto:mgs at autox.team.net>
> > Subject: [Mgs] H4 or HS4 carbs on an MGA 1600 and Electronic Ignition
> >
> > I bought an MGA 1600 with HS4 carbs conversion and a crane fireball
> > electronic ignition.? I would like to go back to a stock set up.? What
> > are the *significant* pros and cons for doing so, for example power
> > (rather than ease of maintenance)?? I know the H4s, but I am unfamiliar
> > with working with HS4s (same with points vs electronic ignition).
> >
>
>
>
> If you decide to go with an electronic ignition get a pertronix unit.
> I have used both , the crane set up with its brackets and screws and
> shutter wheel is difficult to set up correctly and can loosen up and
> fail. The benefit of electronic ignition is not having to set up the
> points at tune up time. Keep a set of points and condenser in the
> glove box in the event the electronic system fails
>
> Sent from my iPhone
>
> On Jan 9, 2018, at 11:52 AM, Robert J. Guinness via Mgs
> <mgs at autox.team.net <mailto:mgs at autox.team.net>> wrote:
>
>> I bought an MGA 1600 with HS4 carbs conversion and a crane fireball
>> electronic ignition. I would like to go back to a stock set up.
>> What are the *significant* pros and cons for doing so, for example
>> power (rather than ease of maintenance)? I know the H4s, but I am
>> unfamiliar with working with HS4s (same with points vs electronic
>> ignition).
>> --
>> e-mail signature
>> Robert Guinness
>> _______________________________________________
>>
>> Mgs at autox.team.net <mailto:Mgs at autox.team.net>
>> Donate: http://www.team.net/donate.html
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> I assume that your back home. First I would work on why it stopped
> running. Getting back running reliable before I would do anything.
>
> paul
>
>
> Paul Osborne
> Department of Electrical and Computer Eng.
> University of Rochester
> 201 Hopeman Building RC
> Rochester NY 14627
> 585-275-5226
>
>
>
> On Jan 9, 2018, at 3:59 PM, Robert J. Guinness via Mgs
> <mgs at autox.team.net <mailto:mgs at autox.team.net>> wrote:
>
>> It ran great for @400 miles on a run from Raleigh, NC to just North
>> of Caryville, TN in the New Years Eve subzero weather, then quit.
>> Would fade and then rev back up (until it didn't anymore). Probably
>> a combination of fuel pump, bad fuel, coil, and voltage regulator
>> issues. Man was it cold on that mountain waiting for AAA!
>>
>> On 1/9/2018 2:40 PM, Charley & Peggy Robinson wrote:
>>> How well does the engine run? If it runs well I wouldn't mess with it.
>>>
>>> CR
>>>
>>> On 1/9/2018 10:52 AM, Robert J. Guinness via Mgs wrote:
>>>> I bought an MGA 1600 with HS4 carbs conversion and a crane fireball
>>>> electronic ignition. I would like to go back to a stock set up.
>>>> What are the *significant* pros and cons for doing so, for example
>>>> power (rather than ease of maintenance)? I know the H4s, but I am
>>>> unfamiliar with working with HS4s (same with points vs electronic
>>>> ignition).
>>>> --
>>>> e-mail signature
>>>> Robert Guinness
>>>>
>>>>
>>>> _______________________________________________
>>>>
>>>> Mgs at autox.team.net <mailto:Mgs at autox.team.net>
>>>> Donate:http://www.team.net/donate.html
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>>>
>>
>> --
>> e-mail signature
>> Robert Guinness
>> _______________________________________________
>>
>> Mgs at autox.team.net <mailto:Mgs at autox.team.net>
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>
> If it were me, I'd put a set of points in the tool box in case the
> electronics fail and not worry about the carbs.
>
> But my cars need me to spend money and time on things that are broken,
> and I'm not that much of a purist. I go original generally but it
> doesn't need to be the same year if something else works out. But my
> cars will never be concourse.
>
> I've got a 70 B with electric ignition and non original engine, and a
> 78 with SUs, that has been converted to chrome and lowered.
>
> Andrew
>
> On Jan 9, 2018 6:32 PM, "Eric Russell via Mgs" <mgs at autox.team.net
> <mailto:mgs at autox.team.net>> wrote:
>
> I can't imagine any significant power difference between H4 & HS4
> carbs. The throats are the same. I suspect the HS4 carbs will be a
> little less leak-prone. (the rubber grommets on the H4 float bowl
> tend to be a weak point, IME) I don't think HS4's came with the
> decel valve in the throttle plate - if they did that could be a
> small difference in power.
>
> I am not a fan of replacement electronic ignition systems. When
> they work they work just fine. But when they don't work,
> replacement of the entire unit seems like the only option. With
> points, an occasional tune-up keeps it working fine. And if
> something does go wrong when you're on the road, a tiny kit with
> spare points & condensor is almost surely all you'd need to get
> going again.
>
> Eric Russell
> Mebane, NC
>
> Date: Tue, 9 Jan 2018 10:52:13 -0600
> From: "Robert J. Guinness" <guinness at stclegal.com
> <mailto:guinness at stclegal.com>>
> To: mgs at autox.team.net <mailto:mgs at autox.team.net>
> Subject: [Mgs] H4 or HS4 carbs on an MGA 1600 and Electronic
> Ignition
>
> I bought an MGA 1600 with HS4 carbs conversion and a crane
> fireball
> electronic ignition.? I would like to go back to a stock set
> up.? What
> are the *significant* pros and cons for doing so, for example
> power
> (rather than ease of maintenance)?? I know the H4s, but I am
> unfamiliar
> with working with HS4s (same with points vs electronic ignition).
>
>
> ______________________________ _________________
>
> Mgs at autox.team.net <mailto:Mgs at autox.team.net>
> Donate: http://www.team.net/donate.htm l
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>
> e-mail signature
> Under those circumstances a fault has obviously developed. I'd
> definitely resolve that first. If you start messing changing major
> components and still have problems you won't know whether the original
> fault is still there, or it is something you have done, or both. But
> why do you think four things all happened to go wrong at the same time?
> PaulH.
>
> ----- Original Message -----
>
> It ran great for @400 miles on a run from Raleigh, NC to just
> North of Caryville, TN in the New Years Eve subzero weather, then
> quit. Would fade and then rev back up (until it didn't anymore).
> Probably a combination of fuel pump, bad fuel, coil, and voltage
> regulator issues. Man was it cold on that mountain waiting for AAA!
>
> Here are the reasons for my suspicions.
> The prior owner did not drive the car very much.
> Fuel Pump (weak slow clicking from the points and sharp blow to the
> pump caused increase in performance)
> Bad Gas (Problems began almost immediately after refueling. Lack of
> prior driving and severe cold may have settled some debris & water in
> bottom of the tank).
> Coil (I had similar problems on another MGA that turned out to be an
> overheating and failing coil)
> Voltage Regulator ( Problems arose after turned on lights and wipers
> and heater -- the starter would not crank and no electrics on
> failure. Started it a couple of time with the hand crank though. The
> seller gave me the charger as part of the deal and he had a trickle
> charger installed permanently in the car. I was able to recharge the
> battery overnight and then it cranked well. Of course, it could be
> the generator or wiring downstream from the regulator. It is on my to
> do list )
> The heater control valve also sprang a leak over the distributor, but
> that seems to have occurred only after the breakdown.
> My question really is whether I should go back to the OEM set up
> (which I have n irrational preference for) assuming all the other
> problems are already sorted. Or would I be giving up some significant
> performance enhancements. It did go over the Continental Divide in NC
> strong and well at 60 MPH.
>
>
> On 1/10/2018 2:13 AM, PaulHunt73 wrote:
>> e-mail signature
>> Under those circumstances a fault has obviously developed. I'd
>> definitely resolve that first. If you start messing changing major
>> components and still have problems you won't know whether the
>> original fault is still there, or it is something you have done, or
>> both. But why do you think four things all happened to go wrong at
>> the same time?
>> PaulH.
>>
>> ----- Original Message -----
>>
>> It ran great for @400 miles on a run from Raleigh, NC to just
>> North of Caryville, TN in the New Years Eve subzero weather, then
>> quit. Would fade and then rev back up (until it didn't
>> anymore). Probably a combination of fuel pump, bad fuel, coil,
>> and voltage regulator issues. Man was it cold on that mountain
>> waiting for AAA!
>>
>
> --
> e-mail signature
> Robert Guinness
> Agreed, need to find out why it stopped running first.
>
> CR
> On 1/10/2018 2:13 AM, PaulHunt73 via Mgs wrote:
>> e-mail signature
>> Under those circumstances a fault has obviously developed. I'd
>> definitely resolve that first. If you start messing changing major
>> components and still have problems you won't know whether the
>> original fault is still there, or it is something you have done, or
>> both. But why do you think four things all happened to go wrong at
>> the same time?
>> PaulH.
>>
>
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