Warpy Carburetor
- RSorak 71Westy
- IAC Addict!
- Location: Memphis, TN
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- dtrumbo
- IAC Addict!
- Location: Mill Creek, WA
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That makes sense since these Webers don't have chokes.RSorak 71Westy wrote:Cough while warming up is going lean....i.e. wants more choke/fuel.
- Dick
1970 Transporter. 2015cc, dual Weber IDF 40's
1978 Riviera Camper. Bone stock GE 2.0L F.I.
1979 Super Beetle convertible.
... as it turns out, it was the coil!
1970 Transporter. 2015cc, dual Weber IDF 40's
1978 Riviera Camper. Bone stock GE 2.0L F.I.
1979 Super Beetle convertible.
... as it turns out, it was the coil!
- spiffy
- IAC Addict!
- Location: Walla Walla, WA
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Yeah D, you get the "cat sneeze" too right after cold start-up? The big dual carbed engines definitely are a tad grumpy for the first 10 seconds or so. They wake right up though.dtrumbo wrote:That makes sense since these Webers don't have chokes.RSorak 71Westy wrote:Cough while warming up is going lean....i.e. wants more choke/fuel.
78 Riviera "Spiffy"
67 Riviera "Bill"
67 Riviera "Bill"
- dtrumbo
- IAC Addict!
- Location: Mill Creek, WA
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That's exactly the right word to describe it! O.k. that's normal, I'll move on to finding leaks.spiffy wrote:Yeah D, you get the "cat sneeze" too right after cold start-up? The big dual carbed engines definitely are a tad grumpy for the first 10 seconds or so. They wake right up though.
- Dick
1970 Transporter. 2015cc, dual Weber IDF 40's
1978 Riviera Camper. Bone stock GE 2.0L F.I.
1979 Super Beetle convertible.
... as it turns out, it was the coil!
1970 Transporter. 2015cc, dual Weber IDF 40's
1978 Riviera Camper. Bone stock GE 2.0L F.I.
1979 Super Beetle convertible.
... as it turns out, it was the coil!
- hambone
- Post-Industrial Non-Secular Mennonite
- Location: Portland, Ore.
- Status: Offline
Glad to hear Mike. With mine, the excess pressure (over 10 PSI!) leaked out of the bowl after shutdown and dripped down the manifold and in/out, causing rich (!) startups. 4 PSI (according to a budget gauge) is working just fine.
I too would recommend a file for flanges. You can get a pretty good feel for flatness with practice.
I too would recommend a file for flanges. You can get a pretty good feel for flatness with practice.
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http://pdxvolksfolks.blogspot.com
it balances on your head just like a mattress balances on a bottle of wine
your brand new leopard skin pillbox hat
- Bookwus
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Hiya Bob,
Since I was starting out with a carb that was about .004 out in the middle of the flange, I wanted to go with a process that would be as accurate (read: flat) as was possible. That spelled the glass and sandpaper routine for me.
And since the flange metal (what is that stuff Solex made carbs out of anyway?) was soft the 220 ate it up pretty fast. Came out nice, shiny, smooth, and most importantly, flat.
No kidding! I'd still like to see the technique.hambone wrote:.I too would recommend a file for flanges. You can get a pretty good feel for flatness with practice.
Since I was starting out with a carb that was about .004 out in the middle of the flange, I wanted to go with a process that would be as accurate (read: flat) as was possible. That spelled the glass and sandpaper routine for me.
And since the flange metal (what is that stuff Solex made carbs out of anyway?) was soft the 220 ate it up pretty fast. Came out nice, shiny, smooth, and most importantly, flat.
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It does not have me.
It does not have me.
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- IAC Addict!
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Dual Webers need the heat from the heads to travel up the manifolds before they work right. I'd imagine that Solexes with no chokes or non functioning chokes would be the same. The gas condenses back to large droplets during warm up, giving a lean indication. Once warmed up, the heat from the heads keeps the gas vaporized. A sneeze or hiccup, that is only present for the first few minutes of driving, and goes away after warmup is an indication that your jetting is close. if it runs like a raped ape cold and gets lazy when warm you are to rich. If the sneezing or hiccuping diminishes but never goes completely away you are either to lean, have an unbalanced linkage, slightly unsynched carbs, or maybe a small vacuum leak, possibly throttle shafts.
Edited to add:
When going with dual carbs on an engine that had FI eliminate the phenolic spacers between the intakes and the heads. You will appreciate why on cooler/colder days, they insulate the manifolds from head heat. Did Type 4's ever use the metal intake gaskets? If so those would be the best to use.
Edited to add:
When going with dual carbs on an engine that had FI eliminate the phenolic spacers between the intakes and the heads. You will appreciate why on cooler/colder days, they insulate the manifolds from head heat. Did Type 4's ever use the metal intake gaskets? If so those would be the best to use.
1/20/2013 end of an error
never owned a gun. have fired a few.
never owned a gun. have fired a few.
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- IAC Addict!
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File approach.
A mill bastard file is a flat file with a fine cut. You lay the file flat on the surface of the flange and work the file in a diagonal motion in relation to its length. You don't need to have a perfect finish, file marks are fine, just don't gouge it. I tend to cut my own intake gaskets and use the waxy paper stuff that is about 1/16" thick. Port work is why I cut my own.
A mill bastard file is a flat file with a fine cut. You lay the file flat on the surface of the flange and work the file in a diagonal motion in relation to its length. You don't need to have a perfect finish, file marks are fine, just don't gouge it. I tend to cut my own intake gaskets and use the waxy paper stuff that is about 1/16" thick. Port work is why I cut my own.
1/20/2013 end of an error
never owned a gun. have fired a few.
never owned a gun. have fired a few.
- Amskeptic
- IAC "Help Desk"
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Factory dual carb buses used metal intake manifold gaskets for the cast iron manifolds, but also used phenolic spacers between the manifolds and the carbs.vdubyah73 wrote:Edited to add:
When going with dual carbs on an engine that had FI, eliminate the phenolic spacers between the intakes and the heads. You will appreciate why on cooler/colder days, they insulate the manifolds from head heat. Did Type 4's ever use the metal intake gaskets? If so those would be the best to use.
Colin
BobD - 78 Bus . . . 112,730 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles