IDF 40 mm carb jetting suggestions/help

[jpsport]

I am struggling with my carbs. Here is my challenges and I can’t be the only one who is done something dumb. Pulled off kadrons

IDF, dual 40mm, standard jets, Venturi 28, f11 tubes .50 idle, air, mains out of the box etc.

Engine AE code 1972:
1641cc
041 heads
Stock rockers
C/W crank balanced with 12 lb flywheel
009 distributor with points

Here we go,
Engle 110 cam

Can’t get an idle to save my life, runs super rich just horrible. Very frustrating

What jetting and Venturi combination would work best for a decent idle and runs good not great.

What timing?

Help Samba group?

[vwracerdave]

try some 45 or 47.5 idle jets from ACN. http://vwparts.aircooled.net/Weber-IDF-DCNF-Idle-Jets-p/74405.htm
_________________
2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK

[jpsport]

I did try the .45 idle and ran less rich but still struggled with idle and he air flow adjustment screws had no impact the idle did not fall of in either direction in or out.

[QRP]

[madmike]

check the enrichment plungers, had a pair stuck once
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'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

[67rustavenger]

Any carb/s I buy. Get cleaned and the floats set before installation.
It does not matter who I get them from. The carbs get a rough handling during shipping.
Did you check the float level?
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I have learned over the years.
Cheap parts are gonna disappoint you.
Buy Once, Cry Once!

There's never enough time to do it right the first time. But there's always enough time to do it thrice.
GFY's Xevin and VW_Jimbo!

[tattooed_pariah]

[jpsport]

What is a enrichment plunger never heard of that one.

[KROC]

What is your fuel pressure? 50 idles will be close enough.
Check your float heights
Re sync. them, make sure your throttle linkage is dead nuts even on each carb
You need to have responding A/F mixture screws at idle on all 4 holes before you move forward with tuning.

[tattooed_pariah]

[udidwht]

47.5 idles

10-11mm float height with gasket in place ball NOT depressed

Fuel pressure 3-3.5psi max (critical)

115 mains

190 air corrector jets

And get an SVDA on it.
_________________
1972 Westy Hardtop/Type-4 2056cc
96mm Biral AA P/C's~7.8:1CR
Headflow Masters New AMC 42x36mm heads w/Porsche swivel adjusters
71mm Stroke
73 Web Cam w/Web solids
Dual 40mm IDF Webers - LM-2 - 47.5 idles/125 mains/190 air corr./F11 tubes/28mm Vents - Float height 10.45mm/Drop 32mm
Bosch SVDA w/Pertronix module (7.5 initial 28 total @ 3400rpm)
Bosch W8CC plugs
Pertronix Flamethrower 40K coil
S&S 4-1 w/Walker QP 17862
3 rib 002 Trans
185R14 Hankook tires

[jpsport]

Will a SVDA actually work with a cam that big on a 1641 cc engine.

[udidwht]