Weber/Dellorto - Page 2 - Alfa Romeo Bulletin Board & Forums
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post #16 of 31 (permalink) Old 02-05-2016, 09:15 AM
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My 2L with 40DCOE116/117 emissions Webers made 169 HP on the dyno and got 24 mpg before I switched to 45DCOE152's.

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post #17 of 31 (permalink) Old 02-05-2016, 11:40 AM
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My 2L with 40DCOE116/117 emissions Webers made 169 HP on the dyno and got 24 mpg before I switched to 45DCOE152's.
You should put your foot down every now and then
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post #18 of 31 (permalink) Old 02-05-2016, 01:24 PM
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You should put your foot down every now and then
I do, very frequently.

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post #19 of 31 (permalink) Old 02-05-2016, 02:13 PM
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I'll just stand by and watch the carnage; this is gettin as bad as an oil thread..................almost.

First Alfa a 1964 Giulia Spider, then a '57 Giulietta, '67 Giulia Super, '72 GTV, '63 Giulia Spider (modified to Veloce specs +), '72 GT Jr.
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post #20 of 31 (permalink) Old 02-05-2016, 04:32 PM
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the H being even more of an emissions carbie in that it's mixture screws were recessed and sealed under a lead plug
These screws control the air bypasses used to equalize the flow at idle speed because the butterflies practically never seat evenly. Of course they do affect the mixture when played with, but they are hardly supposed to. The mixture is set mainly by the idle fuel jets.

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post #21 of 31 (permalink) Old 02-05-2016, 05:35 PM
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Thank you QV usually called a mixture screw in this part of the world is there a correct or universal name for these screws.

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Last edited by sportiva; 02-06-2016 at 11:56 AM.
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post #22 of 31 (permalink) Old 02-06-2016, 04:44 PM
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I did a search and found an answer " MIXTURE SCREW" to easy

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post #23 of 31 (permalink) Old 02-08-2016, 12:53 PM
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At Alfaholics we've found very little to choose between Weber and Dellorto carbs, neither is "better" or "worse" than the other. Except in two crucial areas.

1. You can still buy new Webers. Ok they may be Spanish not Italian (so what?) but new carbs are always preferable to some junk mismatched "pair" you picked up on EBay.

2. Webers have been the biggest seller for years so anyone with a rolling road will have a big box of jets and chokes they can swap around. They're also more familiar with the effects of a jet swap so your rolling road session will accomplish more in less time and at less cost.

For what it's worth, in the UK at least, 2 litre engines on Dellortos were considered to be quicker than Weber equipped cars in stock form. I like Dellortos personally, they're simple devices that work well.


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post #24 of 31 (permalink) Old 02-08-2016, 02:15 PM
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My 2L with 40DCOE116/117 emissions Webers made 169 HP on the dyno and got 24 mpg before I switched to 45DCOE152's.
Switch to Dellortos and make more power !!

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post #25 of 31 (permalink) Old 02-08-2016, 11:39 PM
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I like Dellortos personally, they're simple devices that work well.
I couldnt agree more with this
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post #26 of 31 (permalink) Old 02-09-2016, 09:52 AM
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Originally Posted by Mound Dawg View Post
At Alfaholics we've found very little to choose between Weber and Dellorto carbs, neither is "better" or "worse" than the other. Except in two crucial areas.

1. You can still buy new Webers. Ok they may be Spanish not Italian (so what?) but new carbs are always preferable to some junk mismatched "pair" you picked up on EBay.
I believe some machining is required to complete them properly.

I also believe Dellortos are superior in the accelerator pump design. Piston versus diaphragm ???


Also regarding jets, just solder up the existing holes and redrill them. That is what we did with my Sud race engine when we needed to change the jetting. You can purchase the drill bits from somewhere (my father obtained the right size one for me as he has/had the NZ automotive connections, but I'm sure UK/USA, etc. has the same).

My 1750 has Solexes, that have now been completely ruined as where they were stored allowed water in. They will be replaced with Weber or Dellortos from an Alfa that didn't make it, and rebuilt.
Pete

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post #27 of 31 (permalink) Old 02-09-2016, 02:06 PM
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Also regarding jets, just solder up the existing holes and redrill them. That is what we did with my Sud race engine when we needed to change the jetting. You can purchase the drill bits from somewhere (my father obtained the right size one for me as he has/had the NZ automotive connections, but I'm sure UK/USA, etc. has the same).

Yes, you could do that but it's a bit laborious though when you're paying the guy at the rolling road by the hour to tune your car and he's sitting there scratching his backside while you break out the soldering iron and Dremel.

As I went on to say, it's easier to go to a rolling road where they have a big box of spare jets that they can just pull the right ones out of and fit in two minutes. With Webers there's a good chance that'll happen. With Dellortos it's a much smaller chance.

Dellortos may be "better", I tend to agree but Webers are better for more people simply because of their ubiquity.
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post #28 of 31 (permalink) Old 04-16-2018, 01:29 PM
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Dellorto Carbs are as configurable and my opinion better than Webers
https://www.dellorto.co.uk/product-c...ts/dhla-parts/

The older I get.. the faster I was....
Tom

Last edited by Tom Frasca; 04-16-2018 at 01:33 PM.
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post #29 of 31 (permalink) Old 04-16-2018, 03:17 PM Thread Starter
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Dellorto Carbs are as configurable and my opinion better than Webers
https://www.dellorto.co.uk/product-c...ts/dhla-parts/
I agree...
But they don't look as good
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post #30 of 31 (permalink) Old 04-16-2018, 03:27 PM
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I agree...
But they don't look as good
The ugly ones are always better.....(waiting to get clobbered by the censors)...
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The older I get.. the faster I was....
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