 Carb jetting?, I got lots of top end, no bottom |
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| VaccaRabite |
 Nov 9 2008, 11:21 AM
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En Garde!  Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region  |
So, ScottyB spent all of yesterday trying to get my carbs properly adjusted.
We can not get it to idle well below 1500 rpm. it sings around 3000, and screams above 4000. Even wthout load, we can tell the carbs are tuned for top end only. Here is the deal. My motor is a 2056. The carbs are 44 webers. I KNOW that I will have an easier time with 40s. But I don't have 40s. And I know that folks around here have gotten 44s to work with a 2056. (I'm looking squarely at you here, OpaAndy). So, engine particulars. 2056 motor. compression test gives a range of 135 to 148psi on a warm engine WebCam 494 grind Valves are (freshly) adjusted to .006 in and ex (as per the cam card) Deck deck height is .040 CR is 9.5 to 1 (calculated here: http://www.cprparts.com/ci_calc.html) Exhaust is EuroRace header with a turbo muffler My house sits at ~700feet elevation, but my driving area is between 100 and 1000 feet (I live around foothills) How should I jet these carbs to work with this motor? What should my venturii size be? I CAN NOT put my motor under load yet. The motor is in the car as of yesterday, but the car is NOT yet drivable. Zach |
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Posts in this topic
Vacca Rabite Carb jetting? Nov 9 2008, 11:21 AM
Kirmizi Zach, have you read Harney's Carburetor Clinic... Nov 9 2008, 11:27 AM r_towle Your venturis are to large.
What size do you have?... Nov 9 2008, 11:28 AM Kirmizi http://www.carburetorclinic.com/weber_tech.htm
Mik... Nov 9 2008, 11:30 AM rhodyguy bear with me a minute. with the linkage disconnect... Nov 9 2008, 11:30 AM
Vacca Rabite
bear with me a minute. with the linkage disconnec... Nov 9 2008, 11:34 AM type11969 Zach-
I have dell 40s on my 1.8 (equiv in fl... Nov 9 2008, 11:32 AM Vacca Rabite Another wrinkle. I don't know my vent size. ... Nov 9 2008, 11:36 AM r_towle
Another wrinkle. I don't know my vent size. ... Nov 9 2008, 02:04 PM stepuptotheMike Zach,
Looking at the notes on my 2056 with Weber ... Nov 9 2008, 11:45 AM rudedude I've go a similar 2056 with 33mm venturis in w... Nov 9 2008, 01:27 PM 904svo Sounds like you have a vacumn leak, get starter fl... Nov 9 2008, 01:42 PM Joe Ricard Doesn't matter.
I will also bet on a vaccum l... Nov 9 2008, 03:06 PM klink OK here's my two cents. Just got finished bui... Nov 9 2008, 08:06 PM 904svo
OK here's my two cents. Just got finished bu... Nov 9 2008, 08:45 PM klink So that's what those are....one of them went h... Nov 9 2008, 09:05 PM Vacca Rabite I just pulled a carb and took stock of what I had.... Nov 14 2008, 09:54 PM 904svo Change the mains to 135 that should help the low e... Nov 15 2008, 07:25 PM r_towle bigger main jets is compensating for the low air s... Nov 15 2008, 07:43 PM Vacca Rabite I have been emailing with the guy at Aircooled.net... Nov 15 2008, 10:35 PM r_towle well keep on trucking but watch your plugs and sme... Nov 15 2008, 10:53 PM Vacca Rabite
OR .....will I finally get to see your ugly ass ... Nov 15 2008, 11:07 PM Dr Evil Wish I could come over to play...too much stuff to... Nov 15 2008, 11:29 PM r_towle pa build marathon party....
Zach...when is your w... Nov 16 2008, 12:15 AM Vacca Rabite I get off the week between xmas and new years off,... Nov 16 2008, 06:20 AM rhodyguy how lumpy is the idle at 1050? can you live with t... Nov 16 2008, 12:25 PM Dr Evil When we had it idling it would load up so that if ... Nov 16 2008, 01:33 PM Vacca Rabite The phenolic gaskets that I have are paper backed ... Nov 16 2008, 06:09 PM Cevan Is there supposed to be a gasket on one or both si... Nov 16 2008, 06:12 PM Vacca Rabite I don't remember. Its been 3 years since I ya... Nov 16 2008, 06:20 PM type11969 Zach-
Did you actually check the float level... Nov 16 2008, 06:23 PM Vacca Rabite
Zach-
Did you actually check the float leve... Nov 16 2008, 06:37 PM type11969 Have you checked to see if fuel is dripping down t... Nov 16 2008, 06:56 PM 904svo Fuel pressure can only be 3lbs max any more than t... Nov 16 2008, 07:14 PM Vacca Rabite
Fuel pressure can only be 3lbs max any more than ... Nov 16 2008, 07:33 PM type11969 Is it a rotary (cylinder) or diaphram (box)? Rotar... Nov 16 2008, 07:35 PM Vacca Rabite
Is it a rotary (cylinder) or diaphram (box)? Rota... Nov 16 2008, 08:01 PM 904svo If its the rotary pump from Aircooled its set at 3... Nov 16 2008, 08:54 PM scotty b Slower velocity intake charge created a motor that... Nov 17 2008, 07:18 PM r_towle B)-->QUOTE(scotty b @ N... Nov 17 2008, 10:40 PM
Borderline I agree: The jetting sounds like it's in the ... Nov 17 2008, 10:37 PM
Dr Evil :popcorn: learning a lot in this thread :) Nov 17 2008, 10:51 PM
rhodyguy another thing to consider if you go chasing leaks.... Nov 18 2008, 10:03 AM
r_towle
another thing to consider if you go chasing leaks... Nov 18 2008, 10:27 AM
rhodyguy and...do not use steel cut washers under the intak... Nov 18 2008, 10:44 AM
904svo I also had a leak on my carbs which I chase for ov... Nov 18 2008, 10:54 AM
jmill
My floats are both ~10 to 11 mm when closed. I h... Nov 18 2008, 05:35 PM
Borderline I agree: The jetting sounds like it's in the ... Nov 17 2008, 10:37 PM Dr Evil :popcorn: learning a lot in this thread :) Nov 17 2008, 10:51 PM rhodyguy another thing to consider if you go chasing leaks.... Nov 18 2008, 10:03 AM r_towle
another thing to consider if you go chasing leaks... Nov 18 2008, 10:27 AM rhodyguy and...do not use steel cut washers under the intak... Nov 18 2008, 10:44 AM 904svo I also had a leak on my carbs which I chase for ov... Nov 18 2008, 10:54 AM jmill
My floats are both ~10 to 11 mm when closed. I h... Nov 18 2008, 05:35 PM  |
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