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weber help to lean

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Old 08-29-2011, 02:06 PM
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weber help to lean

so let me start i just had my motor built and well my weber i bought wasnt jetted right so i blew my head gasket just a lil leak and i know i have a 32 36 but dont know what model exactly how do i tell and i need bigger jets where do i get them ive looked everywhere pls any help would be awesome thanks
Old 08-29-2011, 02:25 PM
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so i learned stock jets are like 140 and they only have bigger ones up to 150 or 55 for my 32 36 is that still to lean and if it is what should i do this a brand new carb
Old 08-29-2011, 02:43 PM
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Typically you don't change primary and secondary main jets which is the 1.40mm you mention above, you change the primary idle jet.

Read this to the letter, follow it exactly. I have seen too many people just slap a weber onto these 22r's and then complain they are crap.

http://www.redlineweber.com/html/Tec...lean_best_.htm

I shouldn't even post this as I have said it on here, many many times and I know for a fact it shows up in the search feature.

Second of all you need to find out if the previous owner changed ANY of the jets in the carb, which means you have to tear it apart to find out if you no longer can contact the owner. And it's not just the main and primary jets, you also have air corrector jets and all the other ones as well. The above mentioned lean best idle adjustment ONLY assumes you have the correct sizing to start with.

Factory Jet sizes are here assuming it's a 32/36 DGEV electric choke and not a DGV manual choke. : http://www.webercarbsdirect.com/v/vs...3236DGAVEV.pdf

Thirdly this site should have every jet you need. http://www.webercarbsdirect.com 73801.140 would be the one you are looking for but they have them from 100 all the way to 210. But again that is not how to properly tune these webers unless your running a trick setup like the sync link kit or a highly modified race motor.

Last edited by xxxtreme22r; 08-29-2011 at 02:55 PM.
Old 08-29-2011, 03:42 PM
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thanks for the reply i appciate it i just talked to the guy who built it and does for a living where my truck is sitting in his yard lol he says that for how much i got it built i need a 38 or holley and said 38 would be pushin it
Old 08-29-2011, 03:44 PM
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the only reason why you would need a 38 is if your running a hybrid or a stroked motor. Mine is perfectly fine with a header, 268 cam, stock head 20 over with a 10 thous shaved block. 2 1/4" exhaust. Your probably not running much more compression then I am. As the 40 over will counteract the KB pistons you got.

Stock 22R Aisan 326 cfm - ~ 224 HP
Weber 32/36 DGEV IC 325 cfm - ~ 224 HP
Weber 34 DGEC 300 cfm - 207 HP
Weber 38 DGES 390 cfm - 270 HP

These are ball park estimates and temp/engine efficiency will play a part as well.

Last edited by xxxtreme22r; 08-29-2011 at 03:58 PM.
Old 08-29-2011, 04:00 PM
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ok maybe ill just stick with my carb so i can get 100 to 210 main jets what would you do if it was yours and do i need just those ones or what all would i need jet wise i would rather get all new jets for the whole im sorry if this in a thread some where and thanks for all the help
Old 08-29-2011, 04:03 PM
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l'd tear the thing apart if the guy can't tell you exactly which jets he changed so you can put them back to stock. Then go from there. And I'll be honest, I am not too familiar with rejetting anything other then the primary idle jet. Which in most cases is all that is needed. However, a 38 would probably "feel" better with the lager tire size and whatnot, just letting you know what you have should be fine.

Last edited by xxxtreme22r; 08-29-2011 at 04:05 PM.
Old 08-29-2011, 04:09 PM
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ok ill start from there the carb was picked off craigslist for cheap but had the box and recipt said only used for a month or so ill try to put it back to stock the best i can but i have a feeling ill still need bigger jets afterwards thanks for all and sorry you had to deal with a newb
Old 08-29-2011, 04:12 PM
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na that's fine, if your gonna tear apart the carb to check all the jets you might as well get a rebuild ki for it. My guess is that the guy ran it for a month because he didn't know what he was doing and got rid of it. Which is typical of someone with a weber. As alot of people slap the thing on don't read the directions that come with it then bash the carb. I have had 0 issues with the carb on mine, just the crappy two-piece adapter which I remedied this weekend buy using the 1 piece transdapt adapter. Oh and the occasional stalling when off-road but that;'s to be expected from most carb's that haven't been modified to handle bouncing around and such.
Old 08-29-2011, 04:13 PM
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seen that you re edited last post lol ya idk anything about carbs thats why my guys doing it but should i just get bigger jets since a 38 is bigger anyaway more gas to haul ass?

Last edited by creswellhick; 08-29-2011 at 04:16 PM.
Old 08-29-2011, 04:19 PM
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I only had to go up on one jet for the primary idle jet from the stock 60 to a 70. currently I am right at 2 turns out. I have not changed one thing internally to the carb. Only regulated my fuel pressure down with a holly regulator to 3.5 psi and blocked off my fuel return line per the instructions.

Last edited by xxxtreme22r; 08-29-2011 at 04:21 PM.
Old 08-29-2011, 04:24 PM
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ok ill talk to my guy tomorow tell him whats up and order all my jets after wards
Old 08-30-2011, 10:22 AM
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so i talked to my guy he wants me to get all stock jets turn it back to stock and then run one up on the primary jet does that sound right
Old 08-30-2011, 10:25 AM
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correct, that's what I was originally saying, to save yourself some coin, find out which stuff he had changed out.
Old 08-30-2011, 10:29 AM
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thanks im just going to run all new jets guess i got given the wrong carb this one was off a vw he had a toy one right next to it
Old 08-30-2011, 10:48 AM
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called weber got hung up on twice while transfer me and they wont answer calls from my phone number so i use my gf phone answerd first ring and they tell me the guy just left for the warehouse it will be an hour or so or oder online if i could order online i wouldnt of called you bad cus service in my opinon theres got to be more then 1 guy who you can place a order through
Old 08-30-2011, 01:07 PM
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after many hours finally just placed my order will be shipped tommorow they said 2 to 3 days from new york to oregon i say a week but we will see went one up on primary jet from stock and i told them whats been done and they recomend one up on main jet so i got that and a stock one just in case and thankyou for your help
Old 08-30-2011, 01:08 PM
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no problem. so you went with a 65 primary idle jet? I am running a 70 (two sizes up) and I am sitting at 2 turns out.
Old 08-30-2011, 01:25 PM
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i would like to tell u but idk the numbers i knw rigs but carbs are mystery but if thats one size up then sure lol
Old 08-30-2011, 01:26 PM
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Just trying to make sure you ordered the primary idle jet and not the primary main jet.


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