Weber Set-Up and Tune Discussion - Page 9 - JeepForum.com

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post #121 of 1100 Old 12-09-2010, 07:44 AM
ChaseB
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I use the same filter Cooper! Mine is already soaked in oil! Damn 258 block!! I'll be cleaning mine out today lol

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post #122 of 1100 Old 12-27-2010, 01:10 PM
CACooper
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Hey guys. Sorry it has been awhile since my last post... Been busy with the holidays. Hope everyone has had a very Merry Christmas and is looking forward to a blessed New Year.

I wanted to let you know what we have done to the carb over the last couple of days.

As I posted before, we had the timing set to about 10*BTDC and the carb tuned to about 5/8 turn on the idle and a turn and a half on the mixtures. We were still getting a pretty good miss (random) and had a heck of a flutter on the vacuum gauge. I had resolved that this is just the best we were going to get as it is a 25 year old engine afterall. The thing that bothered me the most, however was that it smelled like hell and was burning my eyes (which as far as I can tell means it was running too lean).

In anycase, we decided to start over and tune the carb based on max vacuum as opposed to playing it by ear. So we first hooked up the vacuum gauge and advanced the timing as far as we could while still maintaining a steady needle (around 20inHg) and then backed it down two in (per some instrauctions we found online). Then we backed the idle screw all the way out and reset it to about 7/16 a turn.

From there, we adjusted the mixture screws until the vacuum climbed back up to 19 inHG, or something close to that (Just below the point where we could eliminate all jumping and fluttering. Then we started over.

After about five iterations, adjusting it up slightly each time, we were able to really smooth out the engine and get rid of the smell... She now runs fantastic with no acrid smell and NO miss!!!

The trickiest part was getting the timing back up to a decent level as the needle really started to flutter once we got up to 8-10*... We finally settled on about 7* figuring that the marks are possibly inaccurate after 25 years of wear.

Thought this update may be helpful to someone out there.

Take care and Happy New Year!!!

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...I have tentatively decided I actually enjoy this Cooper-person. Deal with it.
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post #123 of 1100 Old 12-27-2010, 02:33 PM Thread Starter
swatson454
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Excellent work!


Shawn

Live in a way that those who know you but don't know God will come to know God because they know you.
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post #124 of 1100 Old 12-27-2010, 02:40 PM
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Excellent work!


Shawn
Thank you sir!... Had it not been for you and your assistance, we would still be bleeding vacuum out the plates and screwing around with 45's. Fortunately my father-in-law has some excellent tools and a good mind for this stuff and we were able to put this finishing touches on it with the vacuum gauge. If anyone is struggling with the final tuning, I highly recommend going that route!

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...I have tentatively decided I actually enjoy this Cooper-person. Deal with it.
Quote:
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For some reason I keep underestimating you.
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post #125 of 1100 Old 12-28-2010, 09:47 PM
ms198
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ok i just got my weber 38 and took it apart to clean it up. im not sure what the plate is called but it is the one with the hose connection. does this need a gasket between it and the carb. it didn't have one when i got it and the exploded views from the website don't include the adaptor plates. thanks.
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post #126 of 1100 Old 01-01-2011, 02:54 PM
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bump
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post #127 of 1100 Old 01-01-2011, 06:44 PM Thread Starter
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Quote:
Originally Posted by ms198 View Post
ok i just got my weber 38 and took it apart to clean it up. im not sure what the plate is called but it is the one with the hose connection. does this need a gasket between it and the carb. it didn't have one when i got it and the exploded views from the website don't include the adaptor plates. thanks.
If you're referring to the upper adaptor plate with the large, brass port in it, yes, a gasket is needed. You'll need one between the manifold and first adaptor plate; one between the first and second adaptor plate and one between the upper adaptor plate and the carb.

Hope that helps.


Shawn

Live in a way that those who know you but don't know God will come to know God because they know you.
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post #128 of 1100 Old 01-01-2011, 06:46 PM
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thanks!
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post #129 of 1100 Old 01-09-2011, 05:01 PM
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help i started with a empi 32/36. went to a motorcraft 2100. really hate the gas mileage. found a Weber 32/36 at the pull a part what jets do i need to put in it?
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post #130 of 1100 Old 01-09-2011, 05:26 PM
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help i started with a empi 32/36. went to a motorcraft 2100. really hate the gas mileage. found a Weber 32/36 at the pull a part what jets do i need to put in it?
55's are preferable.

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post #131 of 1100 Old 01-09-2011, 06:25 PM
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ok so i think i need to put 75 primary 60 secondary, 145 mains, 170 paj ,160 saj
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post #132 of 1100 Old 01-09-2011, 06:38 PM
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ok so i think i need to put 75 primary 60 secondary, 145 mains, 170 paj ,160 saj
These are in fact the typical sizes that are used in many a 32/36DGV application, you may also want to consider having a .080 idle jet on hand to set in the primary for a trial period...all depending on the condition of the engine and of course it's ignition system.
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post #133 of 1100 Old 01-10-2011, 01:14 PM
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OK so some info. i do work on cars a lot. when i got my jeep it had a bad motor. i rebuilt the motor putting everything new in it. its bored 40 over, has a new stock cam vale job, it has a split header with dual exhaust, its been nuttered, im fixing to team rush it. the empi ran good the only problem i had was that when you kicked in the secondary it would bog down something bad so i ordered a kit, but the kit was for a Weber i didn't know it at the time. so when i pulled the carb off to check the inside of it the gasket tore. that's when i put the mc 2100 on it. its a great carb but i only get about 5mpg. more info the jeep has a body lift, shackle suppesion lift, running 33 and auto tranny.
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post #134 of 1100 Old 01-10-2011, 01:15 PM
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mcmud,
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post #135 of 1100 Old 01-10-2011, 01:16 PM
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mcmud, where is the best place to order the jets from?
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