 2056 mild carb settings, new tune advice needed |
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| RFoulds |
 May 8 2023, 05:58 PM
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#1
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Green Teen 66  Group: Members Posts: 837 Joined: 10-August 09 From: La Quinta, CA Member No.: 10,656 Region Association: Southwest Region 
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Now that the milder 2056 is in the car, I could use some advice on carb tune.
compression is at 8.8:1, valves are 44/38, cam is Webcam 86a. Weber IDF 40's have 37mm venturis, 135 mains airjets 200 F11 emulsion tube I am told by the builder that I should step down to 34 venturis, but, have no idea where else to start. Car will go to a good tuner soon enough, just want o have a good starting point. |
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| slapshot |
Sep 8 2023, 06:06 PM
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#2
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Member Group: Members Posts: 58 Joined: 11-June 23 From: Utah Member No.: 27,409 Region Association: Rocky Mountains
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I'v got a 75 914 2.0 unknown piston and crank with
Weber 40 DNCF 101-250 4D Venturis: 30mm Mains: 145 Idle Jets: 65 Airjets: 210 Emulsion Tube: F36 When I bought it it had 57.5 Idle Jets and back fired at idle and at 2500 RPM. I went down to 50s and it got worse. It runs lots better with 65s. Theres some popping when coasting in gear. I'm at ~4300ft elevation. 50s should be the right size from what I've read but they are not working in my car. My idle mixture screws have to be turned way out also for it to run good. They were between 10 and 11 turns with the 57.5s when I got it. I've got it at 5 turns with the 65s. Big idles and lots of turns. It doesn't seem right but its running way better. |
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Posts in this topic
RFoulds 2056 mild carb settings May 8 2023, 05:58 PM
nditiz1 I would start with 115 mains, 28 vents, 50 idle.
... May 8 2023, 06:22 PM
930cabman
I would start with 115 mains, 28 vents, 50 idle.
... May 9 2023, 05:57 AM r_towle Agree with above
Venturis are fir airflow volume a... May 8 2023, 07:18 PM VaccaRabite Yeah. 37mm and 34mm vents are HUGE. They make se... May 9 2023, 08:33 AM sportlicherFahrer I have a very similar engine combo in my '73 c... May 9 2023, 08:51 AM RFoulds Anyone have some 32 vents to sell? Cant seem to s... May 11 2023, 04:18 PM sportlicherFahrer Looks like they may be in stock at CB :confused: ... May 11 2023, 04:32 PM RFoulds
Looks like they may be in stock at CB :confused:... May 11 2023, 05:31 PM 930cabman Or Pegasus, generally has most any Weber stuff May 11 2023, 05:28 PM nditiz1 Pierce manifolds is my go to for all weber parts. ... May 11 2023, 06:47 PM rfinegan
Pierce manifolds is my go to for all weber parts.... May 12 2023, 06:27 AM 930cabman +1 with Pierce, they always have May 12 2023, 09:40 AM GBX0073 Randy Congrats on getting your engine back looking... May 14 2023, 11:15 AM Spoke Hijack:
On my 2056, I have some popping when the ... Sep 5 2023, 06:28 AM rhodyguy For starters get a set of 32mm Venturi. Go thru th... Sep 5 2023, 06:34 AM nditiz1 @spoke
I get popping out of my carbs until fully... Sep 5 2023, 08:15 AM Spoke
@[url=http://www.914world.com/bbs2/index.php?show... Sep 5 2023, 12:54 PM Spoke @nditiz1
Checked all adjustments and synched the... Sep 7 2023, 09:47 PM 930cabman
[b]@[url=http://www.914world.com/bbs2/index.php?s... Sep 8 2023, 05:42 AM |
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