How To Synchronize Dual Carburetors On Your Classic Volkswagen Beetle
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- Опубліковано 29 вер 2024
- Explaining how to sync dual carbs for your VW and any other vehicle. These are Weber 40 IDF carbs, but this process is the same for all dual carb setups on type 1, type 2, type 3 and type 4 engines.
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You resemble a lot like Stephen cox on UA-cam?
Nicholas sanza I’ve watched a few of his videos in the past. If you think I’m similar to Stephen, I consider that a compliment. Thank you.
I’m doing mine tomorrow since I adjusted my valves from your valve adjustment video.
Awesome, glad the video helped you along 🤙
Okay Gary I checked the mixer on the carbs with the cane meter and the passenger side is a 5.5 and the driver side is a six
Which side should I match
@@ChrisSustayta you’ll have to figure that out as you want both sides to be the same. It’s not about the number as long as they both match and your idle rpm is where you want it.
Thanks so much! Been having issues with popping, spitting and backfire through my dellortos ever since the new engine.
I’m glad the video was helpful!
Hope you have a great safe rest of the week.
Just got my synchronizer in the mail I'm so glad you pointed out not to rev it up with that on there cuz I would have totally done that!!!
evil beetle customs& creations I’m speaking from experience, that’s why I mentioned it 😂
Stay safe and healthy.
Thx for explaining the adjustment of synchronisation 😍
Cheers mate 👍🏻🍻
I have other videos explaining syncing the carbs as well. Glad you found it useful. Have a great week and stay safe.
@@VWJawbreaker I subscribed to your Channel now 👍🏻
@@SatHoschi1834 I appreciate that man, make sure you say hello here and there!
Thank you!
@@Procooktip absolutely 🤙
Good info! 👍thanks for sharing!
I just ordered the duel Weber from Redline, (64 ICT) Where can I get a snail? Too, I love the exhaust sound? What set up is that? Thanks.
Eddie McGregor you can order a snail from just about any online VW parts suppler.
The exhaust is home made on this setup. I’ve since upgraded engines and exhaust.
Thank you for the Awesome video helped me understand better. Can you explain how the snail meter works? Like why did you set it to 4 and what that represents?
Also where do you buy them. I have a 2110cc engine in my 67 VW bug with 40 weber's
@@offensivegamers1440 glad the video helped you out!
The snail can be purchased at most any VW supplier.
What you’re doing is measuring the airflow on each cylinder to ensure the carbs are pulling in the proper flow so they are balanced. Don’t worry about the number 4, every engine will be slightly different. Dial in your carbs via rpm, lean beat idle, timing, etc. Then use the snail to make the necessary adjustments to make all 4 carb throats the same number. If the front and rear are slightly off and it’s running smooth, don’t stress it. You’re mostly measuring the left and right carb.
Do you have a video of putting in dual carb windows for adjustments
I don’t think I do. I’ll look later on but I’m pretty sure that footage was useless.
@@VWJawbreaker thanks, what was your finial jetting when all done tuning?
@@mastermatt289 sorry, but on which engine? I’ve jetted quite a few and I have a different engine in the car now.
@@VWJawbreaker your hot 2054
@@mastermatt289 right now I’m running 55 idles, 145 mains and 200 airs.
I was soooo looking forward to watching this video but once I saw that SKULL, I turned it off......
Matthew Isaacs sorry you feel that way but I do appreciate your comment.
What's the significance of the skull?
DonziGT230 none really other than my son picked it out for a bday or Christmas present a while back.
@@VWJawbreaker I was wondering if it has some 'hidden' meaning since Matthew apparently freaked out about it. Maybe he thinks there's something sinister about it? Or is just freaked out by an image? Hopefully he'll chime in.
DonziGT230 no hidden meaning. I do like skulls but not in a cult kind of way..... kids got me the shirt a while back 🤷♂️
To each their own though.
Thanks man , great vid - i’m new to dual webets so this was very very helpful - much thanks . I would really like to have been able to see the exact adjustment screw you turned on your carb - i still don’t know which screw to adjust but i guess i’ll look for another video contributor who may show that exact adjustment screw - Thanks again Man
On the side of the carb that faces outwards, there’s a mixture screw for each barrel. If you have the same IDF carbs, there are 2 on each carb.
Hope that helps 🤙
My 2110 w/Weber 44’s backfires thru thu the carburetor. Engine vibrates @2200 rpm’s. Suggestions?
Backfiring through the carbs is usually timing related.
What is the difference between single carburetor and dual carburetor VW Beetle Classics? Please explain and thank you ahead.
1 vs 2 carbs.
More performance, power and if tuned properly better mpg.
Nothing wrong with a stock single carb on a stock engine.
As per your procedure is was only able to get the passenger side to a four and the driver side would not come down to a five as I adjusted the carb it’s started to choke out.
Usually when you start dropping the idle down by adjusting the carbs, you may need to double check your timing.
Where can I buy one of those gauges for my dual carbs ever well explained bud 🤙🏻
Most VW stores have them or Amazon.
Where in Washington are you located? I’m having bad trouble with a base setting and synchronizing
I’m not in Washington but in Florida… kinda the opposite corner of the US.
Nice job brother! Good to learn something new! =)
CT thanks man!
Which carbs would you recommend for 1776 single port? Thanks
For a single port and dual carbs, your best options would be Kads or Weber 34’s imo.
I missed where you adjusted them; besides checking the left to right with the snifter?
I’d have to rewatch the video, it’s quite old.
I just didn't understand what you turned on the carb to adjust. would be cool to see the carb adjustment screw even if displayed on another carb , so we see what exactly to turn
Makes sense and I’ll try to redo the video at a later date. You’re turning the mixture screw on the side of the carb. There’s one per cylinder on dual carbs.
I committed on your past 1915 build. I told you I purchased a 1967 bus that has a 1915 not sure of heads and can tell it has a cam not to big. It has a 34 pitc carb and I just added a petronix with single vacuum advance. Any tips on total timing I have 32 deg. Now do I keep adding until it pings and then back off. Any advice would be appreciated.
I would do no more than 32 degrees, usually 28-30 degrees is normal.
@@VWJawbreaker Thank you. It’s been to many years but I’m having a blast using all my older tools like timing lights dwell meters. Thanks for the tip.
Great video. Im still a bit confused; when u use the snail to compare the right front barrell, versus the right rear barrell,…how do u make them the same?
Thanks!
I’m not too concerned about the front and rear barrels being the same as I’m looking for the same change between the front and rear. Most people I’ve seen don’t even look at the rear barrels, they only compare the L&R front barrels which is what you’d compare to sync the carbs.
IF the front and rears needed adjustment, you’d need to adjust the butterflies in the carb. There isn’t an adjustment knob for that.
@@VWJawbreaker ok makes sense. Also, i currently have the boxy style fan shroud with the 2 openings for the air. Is it better to change to the rounder fan shroud, in order to clear the carb. I see some videos that require putting dents into the shroud for fitment.
@@tomasalvarez6040 yes, the 36hp style shroud does give more room for the dual carbs. I ran dual carbs with a stock shroud without issue also. Personal preference and intake manifold style plays a role.
Ever since I adjusted my valves on the passenger side I hear a clunking noise, could it be that one of the valves might be two tight I gauged them all at .06 with my feeler gauge
Hard to say what the noise could be unless I’m there to hear it.
If your valves are all at .006”, you’ll hear a slight tick but not a clunk.
@@VWJawbreaker clunking as it is trying to start like the starter trying to turn the motor
@@ChrisSustayta if the valves are too tight, you shouldn’t have that problem. Check your battery voltage, grounds, starter and the power going to starter solenoid.
Im having an issue with my 1835 motor. I have dual IDF 40's and when Im at idle I have the carbs synced perfectly. they read around 6. When I put throttle on it maybe go up to 10 on the left the right jumps to 20. Im suspicious that the linkage bushing on the left hand side is worn . Does that make sense. Ive already checked compression, leak down, had the carbs rebuilt and checked for leaks around the intake manifold and where the carb connects to the manifold. Thoughts? Also Im backfiring like crazy when I take the throttle up.
If you’re having the carbs read that much if a difference, they aren’t synced properly. If both read the same at idle, then it’s your linkage that’s out of adjustment most likely.
@@VWJawbreaker Do you think it could be the linkage bushings? Also could improperly synced carb cause backfiring?
It could be the bushings, linkage or a combo of the above. With the car off, adjust the linkage so both carbs open the exact amount at the same exact time. Once they are synced and the linkage adjusted, you can go from there regarding the backfire.
I dont know why, but i thought they were adjusted by using the bypass.
Maybe in other applications but not on VW’s.
Some people fine tune the IDF’s with the bypass screw but your main adjustments and syncing should be done with the bypass screws closed.
hello, maybe stupid question but why synchronize at 4? Is there a reason for?
Don’t focus on the number, every vehicle will be different slightly.
Focus on the rpm you want and get both sides to match.
@@VWJawbreaker got it, thanks for the quick reply :)
Absolutely!
What is the tool called that you used to set the carbs up with?
Not sure which one you’re referring to.
what is that meter you used called?
Airflow meter.
Deluxe Carburetor Airflow Meter www.amazon.com/dp/B00CMC57R0/?coliid=IODLJ9IGJZDCW&colid=2QRRIOZBRWGYN&psc=1&ref_=cm_sw_r_apin_lstpd_N8MWWE46CK4GCM3JF8AV&language=en_US
So I just advanced my timing a bit and she smoothed out nice
Haha, well that was easy! I just commented on your other post to double check the timing lol
So cool.
Excellent video , content and delivery , well done Jaws 👍...thank you .
5150mxVW thank you buddy!
So many questions, so little time.I don't think I've ever seen this done before. I have to ask, WHY?
1) I SEE THIS ALL THE TIME. WHAT MAKES THESE GET OUT OF SYNC?
2) IS THERE ANY WAY TO AVOID THEM FROM GETTING OUT OF ADJUSTMENT?
3) HOW DO YOU KNOW, OR WHAT DOES THE CAR DO DIFFERENTLY TO LET YOU KNOW THEY NEED ATTENTION?
ITS MIND BLOWING TO ME THAT THESE CARBS WORK GREAT AND ARE A BIG HELP TO THE VW ENGINE. YOU WOULD THINK OVER THE YEARS SOMEBODY WOULD HAVE CAME UP WITH A SYSTEM TO TUNE THEM ONCE AND BE DONE. I COULD SEE MY OCD KICKING IN WITH THESE. I WOULD BE OUT THERE EVERYDAY ADJUSTING THEM BEFORE LEAVING THE DRIVEWAY.
GREAT HOW TO VIDEO.
- KEEP DUBBING -
Volkswagenplanet thank you for the questions, I think they will be better answered in an upcoming video!
I appreciate you buddy!
@@VWJawbreaker anytime.
Just moved to my first set of weber 40s. Only ran single carbs, so this is VERY helpful. Thx for the step by steps.
Glad you found the video helpful.
man, thank you for this video. i just started my 1915cc, the first ive ever built, and was very intimidated by tuning the carbs... this explains it perfectly and makes me not panic as much lol.... thank you!!
Glad the video was able to help you out!!
Very good video. I’m snooping through your videos today LOL, I had a set of the webers and I must say they ran very nice.
Vintage Beetle And Memories thanks man, I sometimes go back to my old videos just for reference points or refreshers lol
VWJawbreaker Nothing wrong with that at all, LOL you have a really good channel. I go through a few videos of the time.
Great video! I am about to try this on a 71 Advemturewagen...wish me luck! Just got to go buy the tool...
Just take it step by step and don’t rush through it. There’s other great videos out there also that may explain it better if you need.
Good luck!
Great How To Video. You do great work. Engine sound smooth and sweet. Thanks for sharing and helping us. BigW:-)
I liked and subscribed. I watched the entire video. You are great at explaining things and generous with your time, which is why I really thought you were going to show me how to adjust the carburetor. I see your hand moving on something in the back but you never said or showed what it was.
Thank you, I appreciate that.
I was adjusting the mixture screw for lean best idle.
I did what you showed on your video. So far so good, but at acceleration engine does not sound well! It also back fires. What could it be?
Could be a few different things.
Vacuum leak
Possible clogged idle jet
Accelerator not adjusted correctly
Carb jetted too lean.
Thank you so much for posting this dual carbureted video. I was feeling discouraged about my vw and a bit overwhelmed as I am a first vw owner as there were not many videos out there covering this topic
I’m glad it was able to help you out. Don’t get discouraged, there’s tons of good VW people out there that’ll be happy to help you out.
Thank you for this! Just synched my carbs and it went smoothly!
Glad to hear!!
Hello there What type of carburetors is perfect compatible with 1.6 engine Vw old beetle
Depends, lots of options. Depends on the engine, what performance you want but there’s several single and dual applications that will work.
quit looking at your face on the camera look into the lens, you can watch the video later to see how hansom you are.
VW MOSES thanks for the feedback! However I’m only using my smart phone and not a real camera system..... I’m low budget 😂
I have the same snail.... Ah, Hell with it!! Would be easier to make a video!! Keep up the great work!!
VeeDub P8 I figured you had the same one.... make a video, I’ll watch it and see if I learn anything new!
Really helpful video cheers buddy
Happy that the video helped you out!
@@VWJawbreaker well it will come in handy when I get my T2 up and running to make sure things are good. cheers
HEY GARY THANKS FOR THE VIDEO , I HAVE TO BUY THE SYNC TOOL , WHEN IDLING THE LEFT EXHAUST POPS ON AND OFF YOUR THOUGHTS , IT'S A 62 VW DUNE BUGGY ! ( DUEL WEBERS 2 BARREL)
I’d start with double checking your valve lash. Depending on the engine and setup, most all valves should be set to .006”
@@VWJawbreaker ok thanks
VWs are a piece of cake. Been playing with them since the late 70s
Once you understand them they are very easy and a lot of fun!
G'day Kevin from Australia. Great video content perfect.
Question: how do you know. ✌
Kevin Hamling usually the engine will run rough and not sound smooth. That’s usually due to one carburetor not being in sync with the other causing one side of the engine to run at a higher rpm than the other.
Thanks for watching!
@@VWJawbreaker so if one side is running at a higher rpm does that mean the crankshaft is broke? I dont see how one side can run at a higher rpm than the other side. One side can run with more piston force but not higher rpm
Zundfolge1432 one side will not necessarily run at a higher rpm, the side with the higher idle will “carry” the rpm load more than the other side. That’s what causes a very rough idle and off sound.
@@VWJawbreaker ok yes that works. I had dual dellortoes 36, gave up on them after a while but spent hours playing with sinc. wasnt satisfied with them. sync at idle yes but ran worse off the line with both linkage angles on both sides equal. Left side had to open slower to make it run right. I never understood why this had to be that way, unless for some unknown reason the carbs themselves flowed differently or maybe ran different air fuel mixes per what ever throttle position they were at.
Zundfolge1432 sound like there was something wrong with the carbs or jets if it ran that way. If the linkage was opening the same amount on both sides and at the same time, then it’s the carbs. They can be a pain sometimes until you get them figured out and dialed in.
Thanks man! Helpful info!
Thanks for watching and commenting , glad you found it useful!
Hey man Kevin here from Australia. This is one of your most informative video. I always refer back to this.
✌ Peace man
Kevin Hamling awesome man, thanks for the feedback!!
I dont know if you'll see this comment, but with the dual carburetors I wanted to know what the gauge you have behind the fan is? is that required for dual carb, I have heard it is connected to the fuel filter. Please let me know.
Hey Remy, I try my hardest to reply to all comments.
The gauge on the firewall is a fuel pressure gauge connected to a fuel pressure regulator.
It is important for all of the carbs that we run on our VW’s to be at no more than 3psi. With the regulator I can adjust the fuel pressure as needed.
The fuel filter in my application is located by the transmission.
@@VWJawbreaker oh awesome, can you let me know where you got yours from? im looking to buy a 71 beetle, and wanted to dual carb it but I keep seeing this gauge on alot of beetles and wanted to know what it was and how it worked.
@@remyvincent7380 I picked it up from either Amazon or Jegs. It’s the Holley low psi fuel pressure regulator.
Hi, what all do you have going on with your fuel line setup? is that a regulator and pressure gauge?
Tony Peltier hi there. Yes, that is a fuel pressure regulator with a pressure gauge also. Most carbs don’t like more than 3lbs of fuel pressure, more than that the fuel pump can over power the needle and seat.
once again the most useful video pertaining to what im doing right now with my buggy, thank you!
I’m glad the video helped you with your buggy. Have a great rest of the week!
Awesome, I almost got my kit on
Did you ever put the idf carb update kit on your set up?
Nope, never bought them.
Very straight forward and useful. Thanks.
Glad you found the video helpful!
So my 74 westy has ni choke? I jave new carbs. Ill put it on and sync and see if it starts.
Charlie B depends on what carbs you have. Some brands have chokes and some don’t.
VWJAWBREAKER Theres no choke connect to it . Wont start though
Charlie B if they don’t have a choke, you’ll need to press the gas pedal down a little to raise the rpms up until it gets warmed up.
Thanks for the info, regards from the uk .
Thanks for stopping by! Hope you have a great weekend.
Amazing video, thank you very much!
Glad you found the video helpful!
@VWJAWBREAKER I just bought the tool. I can't wait to get this baby purring like brand new! Also, I'll be sure not to rev the engine with the snail on top, lol!
Good tutorial here, thanks for sharing 👍
Hope it was able to help you along. Have a great week!
@@VWJawbreaker definitely, and you as well!
Great video! I do have a question I legit thought the idle mixture screws would play a part in the sync process? How do you know you have the idle mixture screws set properly?
Mileage Unknown yes good point. You’d want to ensure you have the lean best idle set as well.
That was a perfect tutorial !!!
Thank you very much
I’m glad you found the video helpful!
Have a great weekend.
Great info my man,you are the man!
Appreciate that, hope it helped ya out.
Total newbie to this. How do you know 4 is the right idle setting?
You’d need a tachometer to properly determine the rpm speed. My engine at the desired rpm speed, my sail reads between 4 and 4.5.
@@VWJawbreaker Thanks for the reply, what are some have have tools for keeping your bug tuned up?
@@KingDupue I have an older video of stuff I carry with me.... tools, parts, etc. probably recorded it a few years ago. I kinda go overboard a little but it’s good to have more than you need so you’re not having to rely on someone else while on the side of the road.
good vid man. i adjusted mine the other day but missed a crucial step.I didnt disconnnect my linkage and so now my idle is way too high. its running good but scary to drive lol. im going to go out and redo it now. thanks!
Josh Cloutier been there before man! Disconnect one side of the linkage and double check your sync.... you’ll get it, I have faith in ya!
@@VWJawbreaker yeah it's pretty easy just takes doing it the right way once. I should have watched yout video first 😂
Josh Cloutier I never claim to know what I’m talking about, I’m just dumb enough to make videos 😂
@@VWJawbreaker Nah you've got it right for sure man. 😄👍
Josh Cloutier I appreciate that brother because I hate filming myself! 🤪
Great shirt! What fuel pressure you run?
No more than 3lbs of fuel pressure. The carbs on running on my new engine prefer 2.5lbs.
Great video as always
Glad you enjoyed it!
I love you videos!!! 💪🏽💯
Appreciate you buddy! 🙏🤙
Great DIY video...thanks.
m schiffel I’m glad you found it useful. Thanks for watching!
I love your exhaust 👌 good idea 💡
Thanks!
👍✌
Helps alot thanks
Glad it was able to help you out.
very helpful video
I’m glad you found it useful. Thanks for being here.
Thanks!
Thank you for being here.
Nice job man!
Good Old Mike's Garage thank you sir.
Volkswagenplanet ?
@@VWJawbreaker sorry, fell asleep on my phone
Volkswagenplanet hope you had a good nap.
Hello, I have a vw type1 and 1.6 engine I have DRLA 36 mounted and I have a question whether they are adjusted in the same way as you, what are the optimal values on the scale for the carburetor. Answer me how you can
jozek kalata it really doesn’t matter what brand dual carbs you’re using, the process on syncing the carbs is the same.
thank you for your reply.
jozek kalata anytime!
Dude you’re car sounds so good
Thanks man, and to think that was my old engine. 👍
VWJAWBREAKER what engine you got in it now
The one in this video was a 1641 with a C35 cam, head work, etc.
now I’m running a 2054 stroker with large heads and cam, etc. There is a playlist on the 2054cc engine.
VWJAWBREAKER niceeee
Awesome video!!!!
Diego Cruz I appreciate that. Thanks for being here and be safe out there.
@@VWJawbreaker growing up I had a neighbor that had a beetle with a double weber set up and I can remember clearly that he could NOT get them tuned correctly... It blow's my mind to see that with a little patience and the right tools it can be done!!!
Diego Cruz it can be done, it’s just not an easy task for people who don’t understand them.
Great video. Here's an idea for a new video,that's not available on UA-cam yet. Install a wideband to fine tune those IDF carburetors. You'll have to change your exhaust system to a 4 into 1 header,but your engine will run better and use less fuel.
Romeo you are correct and it is on my list to do as soon as I get a wide band. I already have a bung that I can weld into the exhaust header at the collector.
Thanks for the comment and suggestion, just need to find a way to get the wide band past the wife 😁
@@VWJawbreaker
When you do get to chance to make the video, make a series of it ,with lots of details information. It will help your channel out big time. If you want read more how other folks are doing with widebands,check out the samba forums, wideband. Good luck