 New carbs- one barrel pulling in too much air |
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| tornik550 |
 Jul 1 2013, 07:45 PM
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Senior Member  Group: Members Posts: 1,248 Joined: 29-January 07 From: Ohio Member No.: 7,486 Region Association: None  |
I purchased brand new weber 44 idf carbs from redline weber recently. I set everything equally between all barrels. I set the idle stop at 1/2 turn on both carbs. The engine started right up. I disconnected the linkage. Checked the air flow with a snail. Equal readings on cyl 1,2. Cyl 3 was pulling in so much air it was off the chart and cyl 4 was barely getting any air. I backed off the idle stop completely and I am still getting a huge amount of air in cyl 3 and almost none in cyl 4.
I took the carb off and visually inspected. Everything appears normal. Both butterflies appear closed. FYI- I am certain that this is not a valve or cylinder problem. Everything was fine with my previous setup. Any ideas? |
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| rhodyguy |
Jul 2 2013, 11:38 AM
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,249 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
to add to my post. closing all of the by-pass screws and measuring the flow on each throat helps you find a baseline. you then have to bring the highest ones down to the lowest. not to exceed the max # of turns out (by passing the venturi) specified in thomlinson's weber manual.
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Posts in this topic
tornik550 New carbs- one barrel pulling in too much air Jul 1 2013, 07:45 PM
kg6dxn Temporarily swap the carbs right & left. If th... Jul 1 2013, 08:12 PM
tornik550
Temporarily swap the carbs right & left. If t... Jul 1 2013, 08:20 PM brant there is a balance adjustment screw between barrel... Jul 1 2013, 08:16 PM tornik550
there is a balance adjustment screw between barre... Jul 1 2013, 08:22 PM Dr Evil Dang, Steve. You have a fecal touch with carbs. Jul 1 2013, 08:28 PM tornik550
Dang, Steve. You have a fecal touch with carbs.
... Jul 1 2013, 09:23 PM McMark Not the first time I've seen new webers with t... Jul 1 2013, 08:38 PM ThePaintedMan
Not the first time I've seen new webers with ... Jul 1 2013, 09:38 PM rhodyguy by balance adj you mean air bypass screws right? d... Jul 2 2013, 06:45 AM ThePaintedMan
by balance adj you mean air bypass screws right? ... Jul 2 2013, 07:37 AM McMark
Bad manufacturing seems to be a very good reason. Jul 2 2013, 08:45 AM Mblizzard I bet you got the set that I sent back to Redline... Jul 2 2013, 09:14 AM yeahmag This isn't necessarily abnormal. Close all the... Jul 2 2013, 10:34 AM rhodyguy that is NOT a good nor a rational reason mark. ;) ... Jul 2 2013, 11:24 AM yeahmag It's just the opposite. With all the bleed scr... Jul 2 2013, 12:05 PM tornik550
It's just the opposite. With all the bleed sc... Jul 2 2013, 12:17 PM ThePaintedMan
One of the problems is that I cannot reduce the a... Jul 2 2013, 12:27 PM yeahmag Now that... Is a problem. That sounds like a bad t... Jul 2 2013, 12:23 PM McMark You can't really see if the throttle plates ar... Jul 2 2013, 12:59 PM stugray
you need to be very careful loosening those scre... Jul 2 2013, 01:05 PM rhodyguy for heavens sake. how in the hell, with all 4 by-p... Jul 3 2013, 08:11 AM McMark Sorry you're the one that's backwards. Al... Jul 3 2013, 11:32 AM Jake Raby This was a common issue with the "Genuine... Jul 3 2013, 01:42 PM tornik550 I found a way to fix my problem. Return the carbs... Jul 3 2013, 01:49 PM tornik550 UPDATE-
The issue appears to be that the throttle... Jul 4 2013, 06:43 PM McMark They realized that because of their name reputatio... Jul 4 2013, 11:56 PM |
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