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IDF/ #2 weak fire
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EBSTEVE
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Joined: September 11, 2005
Posts: 112
Location: Snohomish wa
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PostPosted: Sun Jan 15, 2017 6:20 pm    Post subject: Re: IDF/ #2 weak fire Reply with quote

Like I said mine were never drilled by Weber and I have never done it. That all being said I would still and tap top and bottom and be done with it.

txoval wrote:
If you go with the method shown at the link, you'd be depending on the o-ring at the plunger.

Can you not tap and plug the hole at the base?
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txoval
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Location: The Woodlands, TX
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PostPosted: Sun Jan 15, 2017 6:36 pm    Post subject: Re: IDF/ #2 weak fire Reply with quote

I like the way you think. Easy to tap and plug both ways. Just curious how others were doing it
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udidwht
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Location: Seattle, WA./ HB, Ca./ Shizuoka, Japan
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PostPosted: Tue Jan 17, 2017 1:12 pm    Post subject: Re: IDF/ #2 weak fire Reply with quote

EBSTEVE wrote:
I am at about 200'. I got the car to run on all 4 it was not linkage (it would do it without it hooked up).
I started with the air bypass screws at 1/2 turn out and got best lean in no time and the pump jets do nothing at idle. I drove the car and it needs a bunch more tuning / jetting but it moves along enough that I got a bit squirrely around a corner.

I have spent far too much time on my car and not enough with my family so I am going to fix the important one.

I will update when I finalize the jetting just in case anyone ever searches.

Thank you all for you help!


At 200' you'll need either 47.5 or 50. No higher than 50. Go down on your vents 28-30 with a 125-130 main. 180-190 air corrector jets.

Get your hands on an LM-2
_________________
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
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EBSTEVE
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Joined: September 11, 2005
Posts: 112
Location: Snohomish wa
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PostPosted: Wed Jan 18, 2017 7:25 am    Post subject: Re: IDF/ #2 weak fire Reply with quote

udidwht wrote:

At 200' you'll need either 47.5 or 50. No higher than 50. Go down on your vents 28-30 with a 125-130 main. 180-190 air corrector jets.

Get your hands on an LM-2


From what I have been told and read I thought the vents should actually be a bit larger with a 40mm intake valve, more between a 34-36. Won't a 28-30 restrict the motor at higher RPM's?

I am no expert but I am trying to understand before I go buying more vents and jets.
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67rustavenger Premium Member
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PostPosted: Wed Jan 18, 2017 9:53 am    Post subject: Re: IDF/ #2 weak fire Reply with quote

Read every page and post from the link below. Read it twice. It will take days This will make you a better tuner and help you understand the way carbs work.
Good Luck.
EDIT, Forgot the link as I was running to a meeting.
http://www.thesamba.com/vw/forum/viewtopic.php?t=293837

EBSTEVE wrote:
udidwht wrote:

At 200' you'll need either 47.5 or 50. No higher than 50. Go down on your vents 28-30 with a 125-130 main. 180-190 air corrector jets.

Get your hands on an LM-2


From what I have been told and read I thought the vents should actually be a bit larger with a 40mm intake valve, more between a 34-36. Won't a 28-30 restrict the motor at higher RPM's?

I am no expert but I am trying to understand before I go buying more vents and jets.

_________________
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!


Last edited by 67rustavenger on Wed Jan 18, 2017 12:57 pm; edited 1 time in total
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udidwht
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PostPosted: Wed Jan 18, 2017 10:14 am    Post subject: Re: IDF/ #2 weak fire Reply with quote

EBSTEVE wrote:
udidwht wrote:

At 200' you'll need either 47.5 or 50. No higher than 50. Go down on your vents 28-30 with a 125-130 main. 180-190 air corrector jets.

Get your hands on an LM-2


From what I have been told and read I thought the vents should actually be a bit larger with a 40mm intake valve, more between a 34-36. Won't a 28-30 restrict the motor at higher RPM's?

I am no expert but I am trying to understand before I go buying more vents and jets.


That won't be an issue. If the vents are to big you have issues at idle. 28-30 is where you want to be. I'd start with 28mm. Also be sure you clean them (carbs) real good as well as the distributor.
_________________
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
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