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rastomas
Samba Member
Joined: April 05, 2007
Posts: 258
Location: rosendale, ny
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 Posted: Thu Apr 20, 2017 8:52 am Post subject: Re: Dual Solex Linkage |
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'Brass cup'
I used a brass or steel "finishing washer" from the local hdware.
Actually, I used three! They stack tightly, and I wasn't sure how long they'd last...couldn't find stock... If one wears thru, there's another one right behind it.
So far, so good.
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"It's not 'You are what you eat', it's 'You are what you don't SHIT". Wavy Gravy.
'74 Westy
Last edited by rastomas on Thu Apr 20, 2017 5:50 pm; edited 1 time in total |
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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 51127
Location: Surrey B.C. Canada, but thinking of Ukraine
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| Posted: Thu Apr 20, 2017 10:00 am Post subject: Re: Dual Solex Linkage |
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| lil-jinx wrote: |
Notice the left pizza slice is not filly seated,you need to remove them thick gaskets.
Busdaddy,is there a grommet or seal of some kind that seals where the warm air valve sit in the piece that is attached to the rear tin?
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Yes, theres a fat hollow donut with a separate lip that keys into the flange on the metal opening. Don't know the part number off hand, sorry.
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Слава Україні! |
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notchboy
Samba Member
Joined: April 27, 2002
Posts: 22449
Location: Escondido CA
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notchboy
Samba Member
Joined: April 27, 2002
Posts: 22449
Location: Escondido CA
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| Posted: Thu Apr 20, 2017 10:42 am Post subject: Re: Dual Solex Linkage |
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And yes - like busdaddy says your right side could be bent out. Bend it in to take out the slack!
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| t3kg wrote: |
OK, this thread is over. You win. |
Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top |
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lil-jinx
Samba Member
Joined: August 14, 2013
Posts: 1109
Location: New Brunswick,Canada
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60vwnewengland
Twin #2
Joined: June 25, 2003
Posts: 1784
Location: District of Columbia & Cape Cod
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| Posted: Sat May 13, 2017 4:10 pm Post subject: Re: Dual Solex Linkage |
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Does anyone have more photos of the plastic cup and spring for the linkage?
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77 Westy - Cape Cod Sage
LLAP |
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60vwnewengland
Twin #2
Joined: June 25, 2003
Posts: 1784
Location: District of Columbia & Cape Cod
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| Posted: Sat Jun 02, 2018 11:31 am Post subject: Re: Dual Solex Linkage |
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Reviving this thread because we've got questions about the dashpot. We got these carbs running great and synchronized with the snail airflow meter.
The ratwell, Bentley, and other website with the synchronize procedures were a great help. That leaves me us with this last question.
What does the dashpot do?
Here's a photo of the dashpot on the setup in the bus currently.
It's missing the spring and plunger.
Is it a crucial part other than what Ratwell says below? It doesn't really seem to serve a except for when the linkage returns to the idle position. Thoughts?
From Ratwell:
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5. Dashpot
Now you can screw back in the dashpot. Bentley gives a spec of 0.04mm as the distance between the plunger and tab when fully pressed in. Not only is this awkward to measure but not very useful because the dashpot wears and the carb linkage is complex.
The way I adjust it is by ear. Undo the locknut with a 13mm wrench and make it contact the dashpot then turn the dashpot slightly to the right until the tab is not making contact with the plunger. If for some reason you can't back off the dashpot all the way, remove the lock nuts and secure it to the bolt from the other side of the dashpot mount but do not tighten.
Now pull on the cross bar to rev the engine and let it go from the open position. Listen to the rpms drop and watch your tachometer and verify that the rpms drop back to the idle rpm instantly. This is your starting point.
Now turn the dashpot to the left until the rpm begins to rise. At this point back off the dashpot by 1 full turn to the right. Now pull on the cross bar linkage again, let go, and listen to the rpms. If the rpms drop as you let go of the cross bar and then rise suddenly the dashpot plunger is too close. Back off the dashpot another turn and repeat the rpm test. At some point the return to idle will be a smooth transition. It may feel too long or too short to you. When you are happy with the setting, secure the locknut.
Lose the temptation to throw away the dashpot. Apart from being a simple emissions device to deal with overrun, it has the added benefit that it helps keep rpms up while you shift gears. With the long shifter in the bus, this really smooths out the driving experience despite the nature of the manual transmission.
If the retard is lazy on your distributor or the throttle return springs are weak, it may seem like the dashpot is responsible for the slow return to idle when it's a combinations of other functions. |
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77 Westy - Cape Cod Sage
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xyzzy
Samba Member
Joined: March 24, 2014
Posts: 229
Location: Encinitas, CA
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| Posted: Sat Jun 02, 2018 5:12 pm Post subject: Re: Dual Solex Linkage |
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I just did this today with Colin on my 73.
The ears with the ball joints on each carb may be bent.
The linkage pipe takes a spring and socket in the right side at the right carb. The linkage should not fall out when compressed. The dashpot should hit in the center of the tab-plate, and the air box cleaner should fit on the mount to give it slight clearance between the linkage pipe and the air box lip.
Here's what it looks like assembled, I can easily take any additional photos you may need:
Here's the spring/socket for the right side of the pipe:
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1973 VW Westfalia 2L hydraulic, dual Solex PDSIT
1987 VW Vanagon Westfalia |
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60vwnewengland
Twin #2
Joined: June 25, 2003
Posts: 1784
Location: District of Columbia & Cape Cod
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| Posted: Sat Jun 02, 2018 6:09 pm Post subject: Re: Dual Solex Linkage |
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Thanks xyzzy. We’re good with the linkage. My question concerns the dashpot on the drivers side carb and if the spring and plunger that’s missing from the dashpot on my setup is a big deal.
Also, it looks like your missing a hose that connects from the fan shroud to the charcoal canister?
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77 Westy - Cape Cod Sage
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airschooled
Air-Schooled
Joined: April 04, 2012
Posts: 12721
Location: on a bike ride somewhere
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| Posted: Sat Jun 02, 2018 8:11 pm Post subject: Re: Dual Solex Linkage |
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Hi there,
The dashpot was an effective way to reduce backfiring, mismatched shifts, jerky throttle release in first and second gear, and hydrocarbon emissions. It is essentially a mechanical version of a vacuum operated throttle positioner. You can read about those here...
https://www.thesamba.com/vw/forum/viewtopic.php?t=641337
Robbie
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60vwnewengland
Twin #2
Joined: June 25, 2003
Posts: 1784
Location: District of Columbia & Cape Cod
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| Posted: Sun Jun 03, 2018 5:28 pm Post subject: Re: Dual Solex Linkage |
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| asiab3 wrote: |
Hi there,
The dashpot was an effective way to reduce backfiring, mismatched shifts, jerky throttle release in first and second gear, and hydrocarbon emissions. It is essentially a mechanical version of a vacuum operated throttle positioner. You can read about those here...
https://www.thesamba.com/vw/forum/viewtopic.php?t=641337
Robbie |
Thanks Robbie. Info is much appreciated. -Dan
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77 Westy - Cape Cod Sage
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