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Discussion Starter #1
I was so happy to stumble onto this BB, been looking for yrs 4 something similar!!
I am the happy owner of a 1974 AR 2000 GTV Automatic Restoration project...or rather the car owns me:D .
I have a couple of Questions I hope you folks don't mind?/!..
1. How many Automatic GTVs were produced....I have had some sketchy answers...to my Knowledge here in South Africa there are only 23...I dunno 'bout the rest of the globe¿..
2. Would it be wise to swap the points system for an electronic ignition system??
3. on the Marelli Dizzy there is a vacuum unit, where does it connect to?...I have been told to look for a connection on Carb nr1....I have Dell'ortos...I have not seen a "pipe" leading out...and wich would be Carb nr1¿, would it be a problem if it was not connected [the reason why I am asking is that the timing seems to be out all the time or rather it goes out of time quickly-(that does not make sense does it)].
I have so many more Q's but for now, I hope you guys can give me some of your valuable experience and input, I look forward and thnk you in advance.
Paul - 1974 AR GTV (auto):confused:
 

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Trained (ex)Professional, , 1953-2018 RIP,
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Hi, Paul. Welcome to AlfaBB.
Pretty rare bird ya got there. Can't help with production figures but I have some thoughts on the two other questions.

>2. Would it be wise to swap the points system for an electronic ignition system??<

Depends. Each have their good and bad points. Electronic ignitions trigger the coil more accurately and are pretty much maintenance free. They would be my choice if building a high performance engine or a track car. However, they can, and usually at the worst possible moment, just plain stop working.
Point ignitions require routine maintenance but are fairly reliable. They can also be adjusted by the side of the road with a thin coin and a book of matches. They would be my choice for a show car (originality) or a slightly modified street car.

>3. on the Marelli Dizzy there is a vacuum unit, where does it connect to?...I have been told to look for a connection on Carb nr1....I have Dell'ortos...I have not seen a "pipe" leading out...and wich would be Carb nr1¿, would it be a problem if it was not connected [the reason why I am asking is that the timing seems to be out all the time or rather it goes out of time quickly-(that does not make sense does it)].<

US version '74 GTVs don't have a vacuum diaphram so I don't know if yours is for timing advance or retard. A service manual specific to your model should provide that info as well as where to hook it up. On Weber equipped cars, the "pipe" is on the intake manifold for cyl. #1, not the #1 carb, which is the carb toward the front of the car.
Timing going out all the time may indicate a problem with the distributor; worn shaft bushings, sticking advance mechanism, worn rotor slot, etc.
 

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I had one too!

Hi Paul,

I had one of these babies with the ZF trans. For a 3 speed auto, it had a lot of grunt. No second gear issues too, what a dream!

The interior looks sweet too! I have some pics which I will post later.

As far as I know, there are 3 or 4 here in Australia including the one I used to own.:(

I missed it to be honest. I wished I had kept it.
 

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Welcome to AlfaBB Paul and Marco. You guys should post pictures in the gallery. I've never heard of any automatic GTV's in the U.S.

I saw this one a few years back on eBay. I think it was in Australia.
 

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Discussion Starter #6
Tx

Tx for the replies Guys.

I must confess that my interior is exactly the same except for those seats... mine are brown vinyl... I actually just bought a new set of seats front and back... just have to go and pick 'em up.
Except for the mags and the engine I will be restoring the car to it's original colour and interior..or as close as possible as the PO killed the interior... the center console is a total mess broken etc etc and 90% of the switches broken or after market/non Alfa equipped...

I found the “pipe” on the intake manifold for cyl. #1 but it is connected to the top of the “cam shaft cover” ...should there be a t-pice in there??...lol..sorry for the stupidity!!!
I have looked again and again at my Brooklands OWM.... not much in there re: this vacuum unit.. and various mechanics has told me diff on having it connected and not to worry about it...
I have had the engine overhauled (by a "professional"¿) and had the Dizzy replaced about 3000kms ago...
I used to have the Bosch dizzy, it broke ..and I was ripped off (nothing like hindsight to see the error of ones ways) and an "Alfa" garage replaced it with a Marelli dizzy...

The prob seems now that one day...the car will be running great, power, speed, fun..etc etc..then the next day...no power.. even feels like i am running on 3 cylinders or that the carbs are buggered, as if I am not getting enough feal thru the system, but this should not be the case - seeing all the work that has been done to the car recently...I have had the carbs set and tested by a carb specialist who told me the Crabs were great and the car was running perfectly (was one of theose days were the mechanic thought I was silly cause the car was going great!!)
My biggest prob at the moment is that in the morning the car refuses to start unless I pump the hell out of the gas (it being winter here does not help either)...
Tomorrow I am actually setting the timing... again...and doing a full service... plugs points filters...only 5000km's after the overhaul...

I will report back what happens...and I will post a pic as soon as I can...I have pics somewhere... prob will have to reshoot, again tx for the replies and patience...

Paul.
 

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Ah, hah!! If the original dizzy was a Bosch, it was more than likely an 045 JF4 which have no vacuum units. So I see no need to hook up the Marelli's vacuum diaphram...yet. A question though. Does the Marelli have one or two sets of points? And if it has two sets, does the vacuum unit act on both sets or just one set? And does the Marelli have a mechanical advance mechanism? Sorry, that's 3 questions. ;)
Good luck with the service!
 

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Discussion Starter #9
erm...

papajam said:
Ah, hah!! If the original dizzy was a Bosch, it was more than likely an 045 JF4 which have no vacuum units. So I see no need to hook up the Marelli's vacuum diaphram...yet. A question though. Does the Marelli have one or two sets of points? And if it has two sets, does the vacuum unit act on both sets or just one set? And does the Marelli have a mechanical advance mechanism? Sorry, that's 3 questions. ;)
Good luck with the service!
HMM....the service went great....just came back from a test drive...
and OMW I am all in love again!!!....BFS!!!

it seems the mechanic did not change points, condenser, rotor and neither the dizzy cap from my old Bosch (is this possible???)
the reason I say this is that the dizzy cap for instance: the cotact points are all scored and marked from where the rotor had cut it when the bushes on the Bosch went....there is this huge gash/mark on the rotor arm and well the points I am just guessing...

OK....with regards to your q's...
Yes, the Bosch had no vacuum unit...I connected up the vacuum unit now....and...well...erm..the car is going great...so it could be a case of yes..it needed it..or no...it does not matter as the timing was very out
1) I have the standard igniyion/not the dual system, so I only have one set of points....I guess that answers Q2 as well then..
3) mechanical advance mechanism?....erm....doh...how would I tell???...

Marco...did you find the g/box to be lazy??
I basiccaly drive my car as a semi auto....

anyways...I am all happy and crap...

Tx again!!
Paul.
 

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Hey Paul,

Yes I drove the car pretty much like a manual. Just a tad lazy the autobox if left to its own. I hear the autobox can take a lot of punishment (not that I ever trash any of my Alfas).

:)
 

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Glad the car is running better with the new ignition parts. That's good news.
I think the best way to test the dizzy's advance is with a timing light. After timing the engine to the "F" mark on the pulley at idle, rev the engine to the high RPM spec (4500-5000) and look for the "M" mark on the pulley to line up with the pointer. If the M mark doesn't line up, then the dizzy's advance isn't up to snuff. Could be that the advance isn't working right or or it has the wrong advance curve for your engine.
When you hook up the vacuum unit with the engine idling, does the engine speed increase, decrease or stay the same?
The two springs are attached to the weights of the centrifugal (mechanical) advance as fitted to this Marelli S103B.
 

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Discussion Starter #12 (Edited)
Nope

Hi Jim...

Nope....the idling does not change when I connect or disconnect the vacuum pipe....would seem strange...but I thought that the vacuum would kick in at higher revs¿

"...The two springs are attached to the weights of the centrifugal (mechanical) advance as fitted to this Marelli S103B...."
=nope....my Marelli does not have those on....

I set the timing up as prescribed in My Brooklans OWM...
and the missing is gone...
I must confess....I had a hell of a time seeing the timing marks....
and at 4600rpms it was pure hell....maybe cause this was the 1st time that I actually succefully set the timing...

car starts 1st time now....runs smoothly....I am happy...
but hell we will see 2morrow morning...

Again..Tx for all your replies!!
I will be bugging with some more...since I have seen some interesting "differences" in pics here...I mean in the engine bay...

time and money will cure it all..!!!
Paul.
 

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It would seem that the vacuum unit may not be working. Or that it requires a steady vacuum signal instead of the pulsing signal it's getting from only one cylinder. The "pipe" fitting, however, may be ported vacuum and not manifold vacuum (don't know for sure). Ported vacuum increases when the throttle opened while manifold vacuum decreases when the throttle is opened. But if the timing is good at both idle and high speed with the vacuum unit disconnected, then the mechanical advance is working so the vacuum unit need not be hooked up.
Your particular Marelli may have the advance weights and springs under the breakerplate.
 
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