also where is best place to buy, thanx in advance
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also where is best place to buy, thanx in advance
2165cc type1, 140 mains. It really depends on altitude, port velocity, compression, cam etc. So I don't know exactly what you will get out of what everybody else runs, unless they have the same motor as you.
Haven't bought anything here yet, but looks like a good deal:
http://stores.ebay.com/ALFA1750S-CARBURETORS-PARTS-STORE_WEBER-CARBURETORS__W0QQ_fsubZ9QQ_sidZ14256877QQ_trksidZp4634Q2ec0Q2em322
Haven't bought anything here yet, but looks like a good deal:
http://stores.ebay.com/ALFA1750S-CARBURETORS-PARTS-STORE_WEBER-CARBURETORS__W0QQ_fsubZ9QQ_sidZ14256877QQ_trksidZp4634Q2ec0Q2em322
weberjets.com
2L T4, sll bolt on stuff (carbs, A1, ignition) setup for ocean level
55 idles
F11
200 airs
135 mains
36mm
I have extra 50 idles, 175 airs and 125 mains if you need em (for 1/2 price of weberjets.com). not sure on the airs though as it looks like the P.O. soldered / drilled them
2L T4, sll bolt on stuff (carbs, A1, ignition) setup for ocean level
55 idles
F11
200 airs
135 mains
36mm
I have extra 50 idles, 175 airs and 125 mains if you need em (for 1/2 price of weberjets.com). not sure on the airs though as it looks like the P.O. soldered / drilled them
Check C B Performance as a parts source, one of many......They may have a link to a chart used in their "Weber Manual" listing jet reccomendations for various size engines....These reccomendations are meant to be a starting point and not as an absolute fix....
C B Perf. drills their jets to a reccomended size for a given engine, when they sell a turnkey motor....It may say one thing and be something else entirely.....I'm told this is a common practice with a lot of builders as it keeps inventory down to a minimum....
Hope this helps....
C B Perf. drills their jets to a reccomended size for a given engine, when they sell a turnkey motor....It may say one thing and be something else entirely.....I'm told this is a common practice with a lot of builders as it keeps inventory down to a minimum....
Hope this helps....
Thought I'd offer up my setup for reference.
I have a 1915 type 1 with an Ingle W110 mild cam, 041 Heads (just larger than stock valves), counter-weighted forged crank, balanced rods. Bosche 009 Distributor with a CompuFire Electronic Ignition, 45000 volt performance coil, Bosche WA8 spark plugs.
For carbs, I have brand new EMPI HPMX 44 Weber dual carbs with 36 venturis. Right out of the box, I disassembled and set the floats and made sure bench settings were dialed in and that everything looked right by the book. I've seen and heard lots of info good and bad on these carbs but so far, I'm well pleased with how I have them running now.
For Carb jetting, I tried MANY combinations (from lean progressing to richer) and the final combination by far has been the best:
Idle jets 55
Main jets 145
Air 200
Emulsion Tubes F11
Venturi 36
This probably looks rich on the Mains to most folks and at times can act a little rich. However, I tried so many combinations and this gives the best all around performance I experienced in all the testing.
Additionally, I came across a formula (I forget where I got it) to help calculate what jets should be close for a given setup. Here's how it calc'd for my carbs:
Idles jet size = 36 (venturi size) * 1.6 = 57.6
Mains jet size = 36 (venturi size) * 4.2 = 151.2
As you can see from the formula, my jets are "leaner" than the jet settings calculated but my final jets are not too far off. I never actually tried larger jets than the finals because this combination makes the engine run like a champ. I'm sure larger would still work but would likely be too rich.
I'm certainly not the most knowledgeable person on the forum about carbs and I don't claim this setup to be ABSOLUTELY perfect. But I can't argue with the all around performance this particular combination has proven to give.
Good luck, happy tuning and I hope this helps!
Trent E.
I have a 1915 type 1 with an Ingle W110 mild cam, 041 Heads (just larger than stock valves), counter-weighted forged crank, balanced rods. Bosche 009 Distributor with a CompuFire Electronic Ignition, 45000 volt performance coil, Bosche WA8 spark plugs.
For carbs, I have brand new EMPI HPMX 44 Weber dual carbs with 36 venturis. Right out of the box, I disassembled and set the floats and made sure bench settings were dialed in and that everything looked right by the book. I've seen and heard lots of info good and bad on these carbs but so far, I'm well pleased with how I have them running now.
For Carb jetting, I tried MANY combinations (from lean progressing to richer) and the final combination by far has been the best:
Idle jets 55
Main jets 145
Air 200
Emulsion Tubes F11
Venturi 36
This probably looks rich on the Mains to most folks and at times can act a little rich. However, I tried so many combinations and this gives the best all around performance I experienced in all the testing.
Additionally, I came across a formula (I forget where I got it) to help calculate what jets should be close for a given setup. Here's how it calc'd for my carbs:
Idles jet size = 36 (venturi size) * 1.6 = 57.6
Mains jet size = 36 (venturi size) * 4.2 = 151.2
As you can see from the formula, my jets are "leaner" than the jet settings calculated but my final jets are not too far off. I never actually tried larger jets than the finals because this combination makes the engine run like a champ. I'm sure larger would still work but would likely be too rich.
I'm certainly not the most knowledgeable person on the forum about carbs and I don't claim this setup to be ABSOLUTELY perfect. But I can't argue with the all around performance this particular combination has proven to give.
Good luck, happy tuning and I hope this helps!
Trent E.
2367 cc on 44 IDF Webers.
155 mains
175 air
155 mains
175 air
Hey Trent , good seeing you here :)
Thanks Alan. Good to be seen!
what should be the sizes for a 1776 cc displacement with 44 webers?
thanks in advance
thanks in advance
A 1776 would be better suited to a pair of single throats, but 40 IDF dual-throats is about max. I personally think you will have a hard time getting 44 IDF carbs to run well on that size motor. Jet size: unknown for your application. Try aircooled.net for some jetting info. They have some good info there.
Daniel;
they work well the only issue is the consumption, otherwise there is no popping or so. I found the necessary sizes in Bob Tomlinson (?)'s weber book but I dont know the stock sizes, does anyone know what are the sizes of air bypass jets and mixture jets of a stock 44 weber?
thanks in advance
they work well the only issue is the consumption, otherwise there is no popping or so. I found the necessary sizes in Bob Tomlinson (?)'s weber book but I dont know the stock sizes, does anyone know what are the sizes of air bypass jets and mixture jets of a stock 44 weber?
thanks in advance
u can find this info at www.cbperformance.com enter weber jets in search box and on the page that shows up there is jet size page, click it.
Burak, they all don't necessarily come with the same "stock" size. All the jet sizes should be stamped on the jets themselves. As long as you are the first owner, none of them should be reamed out larger as a lot of engine builders do.