small hose on cam cover - Page 4 - Alfa Romeo Bulletin Board & Forums
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post #46 of 54 (permalink) Old 01-14-2019, 06:35 PM
But Mad North-Northwest
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Man, it was stuck in there pretty good and no easy way to get a screwdriver on it. Had to hit it with a torch and then use pliers, but it came out. Hole was completely plugged up with hard carbon: had to drill that sucker out.

Thanks for the help guys. Going to be a bit until I can test it out (everything is disassembled right now) but it looks like I'll have vacuum advance again.

Tom

1963 Giulia Spider (1750 engine)
1974 GTV
1991 Spider
Former: 1987 Milano Gold
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post #47 of 54 (permalink) Old 01-14-2019, 07:42 PM
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I assume you have that 45 deg angles brass nipple coming out of the #1 carb, like shown in the two pcis above - mine and Ben's. Couldn't you just have drilled through that nipple with a small drill bit?
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post #48 of 54 (permalink) Old 01-14-2019, 08:01 PM
But Mad North-Northwest
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Nope, my Dellortos do not have any vacuum takeoff. The only port is the one to #1 on the intake manifold, and that's currently hooked up to the distributor advance. Though it wasn't doing much advancing given that it was plugged.

Tom

1963 Giulia Spider (1750 engine)
1974 GTV
1991 Spider
Former: 1987 Milano Gold
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post #49 of 54 (permalink) Old 01-15-2019, 12:08 AM
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Quote:
Originally Posted by Gubi View Post
Nope, my Dellortos do not have any vacuum takeoff.
what Bruce its trying to tell you is that you can drill your front dellorto body for a vacuum conection like the Hs and the Ns bodys, perhaps Gordon Raymon can hekp you here? hes very experinced in the carb stuff
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post #50 of 54 (permalink) Old 01-15-2019, 12:13 AM
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Ive used my own picture to let you understand what to do, hoop it helps
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post #51 of 54 (permalink) Old 01-15-2019, 06:37 AM
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Quote:
Originally Posted by Gubi View Post
Nope, my Dellortos do not have any vacuum takeoff. The only port is the one to #1 on the intake manifold, and that's currently hooked up to the distributor advance. Though it wasn't doing much advancing given that it was plugged.
OK Sorry, I don't think I've seen a picture of your takeoff nipple so I don't know what I'm talking about. Is the takeoff on the engine side of the butterfly choke the "H's are?

PS: I thinjk by "plug", John means installing the nipple.

Last edited by Anfanuts; 01-15-2019 at 06:44 AM.
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post #52 of 54 (permalink) Old 01-15-2019, 08:08 AM
But Mad North-Northwest
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So this car has no vacuum takeoff nipple on the Dellortos. There is a nipple on the intake manifold to runner #1 that is currently hooked up to the distributor advance. This was plugged up with carbon but is now unplugged.

There's really no point in drilling the carbs given that I already have a port to use for advance. The small port from the top of the cam cover is just plugged now.

Tom

1963 Giulia Spider (1750 engine)
1974 GTV
1991 Spider
Former: 1987 Milano Gold
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post #53 of 54 (permalink) Old 01-15-2019, 09:36 AM
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Quote:
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So this car has no vacuum takeoff nipple on the Dellortos. There is a nipple on the intake manifold to runner #1 that is currently hooked up to the distributor advance. This was plugged up with carbon but is now unplugged.

There's really no point in drilling the carbs given that I already have a port to use for advance. The small port from the top of the cam cover is just plugged now.
good luck with it, tell us if it worked out well
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post #54 of 54 (permalink) Old 02-21-2019, 07:44 AM
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Hooked up the vacuum advance last weekend to the port to intake runner #1. The line had a bit of pulsing vacuum but it didn't seem to cause any problems, so I didn't install a vacuum damper: I figure the orifice in the nipple is enough.

Seems to be working well. Idle went up 200 RPMs and it seemed a bit more peppy at part throttle.

This week I'm in the process of switching it to a 123Ignition distributor. The Alfetta service manual had the vacuum advance curve for the stock distributor, so I plan to program the same curve into the 123.
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Tom

1963 Giulia Spider (1750 engine)
1974 GTV
1991 Spider
Former: 1987 Milano Gold
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