 any tips for tuning weber 34ict? |
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| JOE M |
 Aug 28 2009, 03:49 PM
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#1
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Member  Group: Members Posts: 293 Joined: 27-August 07 From: N.H Member No.: 8,042 Region Association: None  |
Curious about how to set the carbs up.The timing is close but may be out slightly.I started by turning the air mixture screws all the way in and than backing both off by 2 1/2 turns to start. I let the car idle and than I move 1 side until the car runs rough than back off the other way about 1/2 turn.I did the same for the other side. It runs ok but pops through the exhaust every now and than.It gets better when I take the throtle linkage off.I think my biggest problem is seting the idle speed screw. Is there something I should do prior to starting any other alignment?I read the procedure but I am stumped. What typically causes it to pop through the exhaust?I did check the vacum on both sides and they are real close ( within 1 of each other).
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| 904svo |
Aug 28 2009, 07:11 PM
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#2
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904SVO Group: Members Posts: 1,124 Joined: 17-November 05 From: Woodstock,Georgia Member No.: 5,146 |
Try this.
 Just had a crazy problem an this fix it, just like a VW setup. |
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| JOE M |
Aug 28 2009, 07:46 PM
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#3
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Member Group: Members Posts: 293 Joined: 27-August 07 From: N.H Member No.: 8,042 Region Association: None |
QUOTE(904svo @ Aug 28 2009, 06:11 PM)  Try this. Just had a crazy problem an this fix it, just like a VW setup. My new ignition came with a vacuum advance. I hooked the lines from the carbs to the distributor advance. I placed a "t" between the carbs and ran it to that way. Should I bring vacuum from both carbs? I have the ports on the manifolds blocked off still but I guess I could run a hose from them. What are these ports for anyway? |
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| 904svo |
Aug 28 2009, 11:18 PM
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#4
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904SVO Group: Members Posts: 1,124 Joined: 17-November 05 From: Woodstock,Georgia Member No.: 5,146 |
QUOTE(JOE M @ Aug 28 2009, 05:46 PM) QUOTE(904svo @ Aug 28 2009, 06:11 PM) Try this. Just had a crazy problem an this fix it, just like a VW setup. My new ignition came with a vacuum advance. I hooked the lines from the carbs to the distributor advance. I placed a "t" between the carbs and ran it to that way. Should I bring vacuum from both carbs? I have the ports on the manifolds blocked off still but I guess I could run a hose from them. What are these ports for anyway? Get a non-contact thermometer and check the exhaust temperature you will find the rear two cylinders are running cool as compare to the front cylinders by tying the two manifolds together this will cause the rear two cylinders to draw gas now. I just went through this,that's why VW tie them together to correct the problem at idle. |
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| JOE M |
Aug 29 2009, 08:24 AM
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#5
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Member Group: Members Posts: 293 Joined: 27-August 07 From: N.H Member No.: 8,042 Region Association: None |
QUOTE(904svo @ Aug 28 2009, 10:18 PM) QUOTE(JOE M @ Aug 28 2009, 05:46 PM) QUOTE(904svo @ Aug 28 2009, 06:11 PM) Try this. Just had a crazy problem an this fix it, just like a VW setup. My new ignition came with a vacuum advance. I hooked the lines from the carbs to the distributor advance. I placed a "t" between the carbs and ran it to that way. Should I bring vacuum from both carbs? I have the ports on the manifolds blocked off still but I guess I could run a hose from them. What are these ports for anyway? Get a non-contact thermometer and check the exhaust temperature you will find the rear two cylinders are running cool as compare to the front cylinders by tying the two manifolds together this will cause the rear two cylinders to draw gas now. I just went through this,that's why VW tie them together to correct the problem at idle. So am I actually going to link both carbs together where the red ports are than t it off somewhere between or are they run seperately? |
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Posts in this topic
JOE M any tips for tuning weber 34ict? Aug 28 2009, 03:49 PM
JOE M By the way it seems to smoke through the breather.... Aug 28 2009, 03:52 PM
neil30076
By the way it seems to smoke through the breather... Aug 28 2009, 04:20 PM jmill
What typically causes it to pop through the exhau... Aug 28 2009, 04:03 PM McMark Make sure to sync the airflow for the left/right c... Aug 28 2009, 05:01 PM JOE M
Make sure to sync the airflow for the left/right ... Aug 28 2009, 06:25 PM aircooledtechguy Here's how I sync duals. . .
First ensure al... Aug 28 2009, 05:38 PM McMark
I think this is a slightly improper description,... Aug 28 2009, 06:43 PM JOE M
I think this is a slightly improper description... Aug 28 2009, 06:52 PM aircooledtechguy
I think this is a slightly improper description, ... Aug 29 2009, 10:14 AM JOE M
[quote name='McMark' post='1208515' date='Aug 28 ... Aug 29 2009, 10:31 AM 904svo
[quote name='JOE M' post='1208536' date='Aug 28 ... Aug 29 2009, 08:35 AM McMark Jake Raby sells a breather box.
Chris Foley sells ... Aug 28 2009, 07:32 PM McMark The exhaust can seem tight and still have a leak. ... Aug 28 2009, 07:38 PM McMark The port with thr red cap should NOT be used for v... Aug 28 2009, 09:40 PM r_towle if you exhaust is leaking, get a small 2*4 and hol... Aug 28 2009, 10:53 PM JOE M Easy enough--how about for the vacum advance. Shou... Aug 29 2009, 08:44 AM McMark Yup. VW did it with their dual single throat Sole... Aug 29 2009, 11:11 AM McMark Oh, just remember to pull the balance tube and plu... Aug 29 2009, 11:27 AM hi4head I installed a set of the Weber 34 ICT's last y... Aug 30 2009, 08:48 PM JOE M
I installed a set of the Weber 34 ICT's last ... Aug 31 2009, 11:12 AM McMark You don't want to T your vacuum lines to atmos... Aug 31 2009, 01:38 PM r_towle Two type of vacuum ports bud.
the manifold vacuum ... Aug 31 2009, 05:02 PM hi4head Joe,
Rich is right on with his comments. If it he... Sep 1 2009, 07:39 PM jcd914
Finally, I have a short length of hose connected ... Sep 2 2009, 01:43 PM JOE M Thanks for all your help. I installed all the conn... Sep 2 2009, 05:02 AM r_towle Flip the carbs side for side and flip the linkage ... Sep 2 2009, 06:59 AM JOE M
Flip the carbs side for side and flip the linkage... Sep 2 2009, 11:08 AM r_towle You can get what you have to work fine...really.
I... Sep 2 2009, 12:33 PM hi4head Joe,
Sorry if this is hijacking your thread a litt... Sep 3 2009, 06:55 PM JOE M
Joe,
Sorry if this is hijacking your thread a lit... Sep 4 2009, 07:21 AM |
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