Mechanical Advance for Dual Weber ICT?

[mikewilkinson007]

I just finished a top end rebuild and added dual ICT carbs to my 72 SP.

She was running pretty well but not as good as I liked so I started tinkering and checking everything. On a whim, I replaced the SVDA with a different SVDA and then with a crappy old Bosch 009 and now it runs like a champ!

Is a mech advance distributor the best option for a (my) dual carb set up?
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72 Super - Marina Blue
1641 AH Dual Port
Dual Weber ICT 34's
Bosch 034

Long Gone: 70 Vert, 66, 68, 73SB, 70, 72, 61 Rag and a 64 with a cinder block in the spare tire well.

[Xevin]

I'm no expert. But since your set up is no longer stock and it runs like a champ. Keep using it. What's the details on your timing?
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Keep on Busin'

[cletus_zuber]

I'm no expert either. I did run a SVDa with my ict's and it worked well.
I'm still not sure the vacuum port on those carbs is correct for the svda.
It ran well so I left it alone. I never tried an 009 on those.
Bocsh 034 distributor, I have never tried any newer aftermarket distributors.

On the Kadrons I have now, which are similar to the ICT in my opinion, I have run a 034, an 019, and a 009, all German made, I can't tell any difference between any of them. I run the 019 because its oldest, cast iron, made in 1960 something or other.
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1972 1302
HPMX 40's & 019

[mikewilkinson007]

I run the 009 at 28 degrees max.

I don't have an OE 034. I have a couple knockoffs. One of those worked flawlessly when I was running the 34 pict 3.

I really question whether the vacuum signal is SVDA correct with the ICT setup. I mean it worked.... but it clearly runs better with the 009. If this continues after I play with it some more.....I may just get a 010 or 019 and call it good.

That 009 I'm using has got about a million miles on it and is really loose.
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72 Super - Marina Blue
1641 AH Dual Port
Dual Weber ICT 34's
Bosch 034

Long Gone: 70 Vert, 66, 68, 73SB, 70, 72, 61 Rag and a 64 with a cinder block in the spare tire well.

[Xevin]

Buy one from Glenn if you go that route.
https://www.thesamba.com/vw/classifieds/search.php...065b8018ec
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Keep on Busin'

[Glenn]

[cletus_zuber]

Mike W how are you timing the SVDA? Try your 28 max with the vacuum line disconnected and see if that works.
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1972 1302
HPMX 40's & 019

[mikewilkinson007]

[mikewilkinson007]

Another thing.....

I only hooked up the vacuum line to one carb and plugged the other. Wonder what using a "t" in the line would do as far as vacuum strength?
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72 Super - Marina Blue
1641 AH Dual Port
Dual Weber ICT 34's
Bosch 034

Long Gone: 70 Vert, 66, 68, 73SB, 70, 72, 61 Rag and a 64 with a cinder block in the spare tire well.

[wcfvw69]

The SVDA vacuum can's require lots of vacuum. They usually start to pull around 140MM HG and reach full advance around 200-230MM HG. So, you have to tap into a strong vacuum signal to achieve this much vacuum.
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[Multi69s]

You can pull vacuum from both sides and it may be what is needed for your SVDA. I am pulling vacuum from all four cylinders on my Type 4 engine with dual 40DCNFs in order to use my SVDA and it runs great.
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69 road Bug 2110
73 Squareback - 2L, T4, Automatic W/ AC
Gone, but many fond memories 69 Baja Bug 2010 - 5 Rib Bus Transaxle
Gone but not forgotten 72 Baja Bug 2010
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[mikewilkinson007]

Timed the SVDA to 28 all in and it's running great. And cooler.
_________________
72 Super - Marina Blue
1641 AH Dual Port
Dual Weber ICT 34's
Bosch 034

Long Gone: 70 Vert, 66, 68, 73SB, 70, 72, 61 Rag and a 64 with a cinder block in the spare tire well.

[Xevin]

[mikewilkinson007]

Very nice, Now when you need a rebuilt SVDA you can buy one from Bill (wcfvw69)

Yeah. I'm already in touch with him. He's been very helpful.
_________________
72 Super - Marina Blue
1641 AH Dual Port
Dual Weber ICT 34's
Bosch 034

Long Gone: 70 Vert, 66, 68, 73SB, 70, 72, 61 Rag and a 64 with a cinder block in the spare tire well.