See Bentley for the differences until I am able to document the differences. Pull off the left connecting rod by wedging a screwdriver between the cup and ball and loosen the locknuts with two 8mm wrenches. 0000045596 00000 n Now turn the dashpot to the left until the rpm begins to rise. xref This is your starting point. Dual 34 Epc Carburetor Kit, Type 1 VW, Dual Port, Compatible with Dune Buggy. Throttle plate - needs to have the correct gap. 0 Not only is this awkward to measure but not very useful because the dashpot wears and the carb linkage is complex. Look at each carb while you move the cross bar or raise the idle with the dashpot reinstalled: both linkages should move at the same time. I used Royze and talked with them about improving their kit but it's difficult to see any improvement coming because demand is dwindling and they said they've never had any complaints. 0000005391 00000 n Hamilton, OH 45015. Apart from being a simple emissions device to deal with overrun, it has the added benefit that it helps keep rpms up while you shift gears. 01/22/05 - Created I am running 34 ICT ( webers ) on my 1600dp they run real smooth and i just checked the sync on them and they where good but idk about the empi version I have used the empi single carb 34 pick on a baja it worked nice with alittle tuning If the gap is too wide, the idle will be too fast. Empi 47-7401 Dual 34 Epc Carburetor Kit For Volkswagen 1500cc-1600cc Single Port Upright Based Engines. If you have the other style of syncing tool, the traditional Unisyn, it better be an original from the 60s. 0000043670 00000 n Set it somewhere in the middle of it's adjustment. It's only the NEW ones that are problematic. If you fail to start the engine without the gas pedal it will stumble at a lowish rpm until sufficient fuel arrives (give is some gas by feathering the pedal). Tweaking the idle mixture is tricky with an exhaust analyzer...more on this when I revisit the article. Dune Buggy & Beetle DUAL 34 EPC CARBURETOR KIT, By EMPI 47-7411-0 With FREE SHIPPING. I believe my distributor is the 009. There are screws for this. (c) Copyright 2004-2011. The Chinese Unisyns are simply junk. EMPI carburetors. Each cutoff has 12v going to it while the bodies are grounded. ask here... Moderators: easy, Clem, faux. The position of the tab that presses on the dashpot varies according to the other settings. ", he replied. 1 1/2 turn out from closed is a good starting point if the carbs are already mounted to their manifolds. 0000002705 00000 n Off-Road. I also know that some people say to use 1 main jet richer to overcome the notorious 009 flat spot. I didn't want the expense or hassle of aftermarket carbs and I wanted to determine if they caused the previous engine to blow. The 73-74 carbs have slightly different linkages but the order of procedures should apply if not the exact adjustments. Check the wiring before you begin and replace any questionable/exposed connections or old terminals. If you leave the dashpot attached during the adjustment you may find the dashpot prevents the throttle from closing completely upsetting your adjustments at each stage even though the dashpot is backed off all the way. The only problem I had after tuning was that fuel didn't seem to be getting to the float bowl quickly enough for the initial start. After pouring in 3 gallons I finally saw some fuel appear in the fuel filters at each carb so be sure you have enough fuel before you go down an unnecessary path of false diagnosis. The carbs need to be in approximate sync before you continue with the other adjustments. 0000001685 00000 n If you only sync at idle the linkage may not be in sync at higher rpms and smoothness/performance will suffer since you are only at idle for brief moments. 0000010655 00000 n The cut-off seems to be designed to limit NOx emission at the expense of producing more CO and HC emissions by running the engine hot. At some point the return to idle will be a smooth transition. I do have Empi 34 EPC carbs.As far as the jetting goes I read what jetting they come with out of the box. 0000022898 00000 n The way I adjust it is by ear. %%EOF Empi Carburetor Tuning . 0000043059 00000 n This is why I find this step hardest: ruling out all the possible causes. 298 0 obj <> endobj 335 0 obj <>stream When you are happy with the setting, secure the locknut. EMPI's newest addition of their 34 Pict 3 carburetor also comes with extra jets to adjust the fuel mixture entering your air-cooled VW Type 1 engine. 0000000016 00000 n If the stop screws are correct but the connecting rod is the wrong length, the throttle will be held open. 298 38 The entire rebuild process can be seen here: See the photos from my rebuild ->www.ratwell.com/dotmac/Sites/Parts/PhotoAlbum80.html. 0000018239 00000 n I understand the practicalities involved: businesses have to rely on new parts but it doesn't mean they always need to throw away what you have before up-selling you. Although not strictly a carb issue, check the vacuum advance cutoff. 85. GOLD NUTS & ROD ENDS WITH GROOVE ARE LEFT HAND THREAD. If the rpms drop as you let go of the cross bar and then rise suddenly the dashpot plunger is too close. Same result if your timing is off or your carbs are not synced properly. This should only require mild adjustment at this point. you save usd $81.00! Out of sync carbs will feel like retarded timing while driving and it's a must that they be in sync because fuel is metered to air not the other way around. Why are people so afraid to try and adjust the stock carbs? Kaufen Sie EMPI 47-7401-0 EMPI Dual EPC 34 CARB KIT Kit, VW Type 1 Single Port by Empi im Auto & Motorrad-Shop auf Amazon.de. These carbs worked for 50k miles...why not another 50k? I've noticed that the EMPI catalog carries 43-5712 which is a synchrometer with both styles of base included for $30. EMPI Dual EPC 34 Kit for Type 2/4, 914 Engines. 0000008164 00000 n position. I could not find any combination of shims under the float valve that would lower the float level from 16-17mm. Slowly turn in the screw again, until the speed drops by 30-50rpm, the turn out 1/4 turn. If you tighten them later it will upset the entire adjustment and you will have to start over. If for some reason you can't back off the dashpot all the way, remove the lock nuts and secure it to the bolt from the other side of the dashpot mount but do not tighten. Idle mixture screw - again Bentley is speechless so mimic the other volume screws are go 2-3 turns out to begin with using the same care. The SK style synchrometer has a cone adapter on bottom. Bentley gives a spec of 0.04mm as the distance between the plunger and tab when fully pressed in. Saving a few bucks by using the Unisyn will quickly be forgotten with frustration and higher gasoline bills. Simply align the marks on the body. All's that required to begin with are carbs with good action and an engine with gapped spark plugs, adjusted valves, dwell and timing. This step, syncing the fuel flow, can only be performed after the air flow has been synced. Kits are available for Dual Port or Single Port engines. Need advice on how to fix it? Now you are ready to sync. The results speak for themselves. Maybe they should inspect what you have first. EMPI 47-7412-0 EMPI Dual EPC 34 CARB KIT Kit, VW 1700-2000cc Type 2/4 & 914 The 2010 Toyota Has a a 16-Valve Twin VVT-i Engine Toyota’s 2010 Venza is readily available in four models which includes the front motor, front-wheel travel 4- and 6-cylinder engines and the lively torque regulate all-wheel generate … As luck would have it, they had those very parts for sale! Rimco is such a company that can re-bush these carbs. Now pull on the cross bar to rev the engine and let it go from the open position. If you cannot start the engine, it usually means you've got a non-carb problem (timing/fuel/etc). The synchrometer is a pass thru style and can sync at any rpm. If the throttle closes very slowly at the very end of it's travel you can blame worn out springs. trailer startxref A switch on the transmission closes in 4th gear and the solenoid which is placed inline with the vacuum advance line from the vacuum can to the left carb opens. Every engine needs vacuum advance under partial throttle conditions so disabling it seems like craziness that will overheat and wear out your engine sooner. Adjustment is a circular process if you skip steps or have a broken part. h�b``�g``�c`e`x�� ̀ �@16�@�Ԃ�) (��H�A�IM��a�mQ`���0#� ��8õ��+�eC��~��0>`�y�I���]@�CgB�_FO��l-�=B �O It does not close the throttle plates. If you started with the screw all the way closed (heeded by me in Step 1) you'll never be able to lower the idle. The original gaskets between the carb and intake manifold were very thin and sandwiched a phenolic spacer. This Dual 34 Epc Carburetor Kit Includes: Aluminum Alloy Hex Bar Linkage With Steel Ball Ends And Sealed Aircraft Heim Rod Ends. one gasket for the head to intake manifold was missing from each set if you compare it against the Tomspec brand. 34 EPC's & Weber ICT's are the same kits and are great on all VW engines. Vw Dual Empi Carburetor Setup . Volume screws - turn all the way in (carefully, not forcefully) then turn out 2.5 turns to begin. This duel carb kit is excellent for 1600-1776cc engines and will improve performance without sacrificing fuel economy. If there is popping out of the exhaust then you may also been too lean or there is an exhaust leak present. When I rebuilt the carbs I set the chokes as per Bentley: lining up the marks on the carb. Ok so I have a 1641cc engine with an 009 and a weber progressive. "Of course the Kadrons don't have any chokes but hey it's California right? 0000002150 00000 n No wonder they want to convert 72-74 buses to webers and Kadrons that have parts available still. You can now remove the slack from the cable. $299.99. Your EMPI carburetor(s) come equipped with the Main, Air, and Idle jets most often used in the kit’s particular application. ALL EMPI 40/44 HPMX Carbs Are Test Run. The carbs are not identical: The left carb has extra controls on the top for adjusting the idle circuit and has an unusual casting that is not used for VWs. Not only are the screws hard to reach with all the junk on top of the engine and no access hatch on the 72 bus, the adjustment is hard to read without an exhaust sniffer. 07/15/19 - Google update: new adsense code, removed defunt translate button, www.ratwell.com/dotmac/Sites/Parts/PhotoAlbum80.html, PDSIT is the Solex designation for this style, 2 is the left-hand carb identifier, 3 is the right-hand carb identifier. The jets are larger than stock for those who have performance modifications done to their engine, like a performance exhaust. Featured Products! the replacement float valve sticks. Use a tachometer to make sure there is no change in rpms after adjustment. Carbs Jetted For Smooth Operation. 2610 Bobmeyer Rd. 0000003533 00000 n Two adapters and a set of matched synchrometers could run you $120 or more. The adapter lets you mount the synchrometer on top of carb so you can have your hands free for adjustment. Luckily, because of the shape of the opening of the 34-PDSIT carbs the base of the coupler is stable and makes good suction with the carb without having to press down on the synchrometer. With the sky high price of Webers since the factory in Spain was shut down after a union strike, these carbs have become attractive again. 0000043328 00000 n Attach the rod back onto both ball joints and twist the threaded part of the rod in the direction that lowers the idle. Now you can screw back in the dashpot. 0000046490 00000 n Adjustment is straight forward. Empi Vw Carbs . If the idle is high you want to lower the reading of the higher of the two carbs rather than raise the reading of the lower of the two. h�bbd`b``Ń3� ���� � �U� ... EASE OF CARBURETOR LINKAGE ADJUSTMENT. 0000004139 00000 n I have carb kits coming so-maybe I can check and see what I have them. When the engine was hot and I attempted a start, it was also instant. You'll find it easier to inject a runny grease rather than try to complete disassemble the shaft. These carbs will run the engine from 15:1 to 10:1 but the carbs/exhaust are going to pop if they are too lean and the engine will feel sluggish if it's too rich. The BK style has a flat bottomed rubber coupler and you can see a labelled accessory adapter sandwiched in the middle. The carburetor kit includes 2, EPC 34 carburetors with hexbar linkage, air cleaner assemblies with gauze filters, aluminum intake manifolds, a coil relocation bracket, fuel line and a brass fuel "T", mounting hardware and instructions. Dune Buggy Warehouse. Bentley instruction are hard to witness sometimes but are the best to go on: That's it for adjustment. Not only are they hard to find, but they are expensive. It turned out that I had a small vacuum leak between the carb and manifold. I don't know what mine have. Slowly turn in the mixture screw until the idle speed drops noticeably, Gradually turn out the screw until the faster speed is achieved. Basically this solenoid disables the vacuum advance on all 72, all 73 and 74 Automatic models only. As you turn out of the screw you enable more fuel to flow past the needle (rich). 9ޟ�e,b�`I� ��������Aqg89`�d��X ���6��l��6Ξ d�1p�iF �` �)� Certainly there is a attractiveness to simplicity and availability but if we threw away every NLA part restoration wouldn't be as interesting. Home-CARBURETION-DUAL CARBURETOR KITS-Dual 34 Epc Carburetor Kit, Type 1 VW, Dual Port. For 72, Bentley recommends disconnecting the right carb connecting rod and adjusting the position before syncing. 0000007772 00000 n Description: EMPI's EPC 34 Dual Carburetor Kit offers improved performance while still retaining economy for your VW. At this point back off the dashpot by 1 full turn to the right. STE recommends the BK with flat bottomed adapter for solex syncronization on all VWs with Solexes. You need to perform this step with the cross bar disconnected so it doesn't influence the setting. When I stopped by a local shop on the off chance they had some used PDSIT carb parts I was looking for, I received the usually reply to my inquiry: "Why do you want to mess with those dual Solexes? The older the kits, assuming the rubber seals are still good, the better. Hey guys. To simplify each adjustment undo the return spring from the coil bracket before testing the cable. One of the guys recommended Kads or whatever the kit is these days, saying the 34’s would be weak, one of the guys said the 34s would be better for what my needs were, just a little boost to my stocker. Kits come complete as seen with Manifolds, Carbs., Linkage, Air Filters, Fuel Line and … Choke - should open within 3-5 minutes and also catch properly on the fast idle cam. If the idle is too low, take the reverse action. The adjustments required are: Float level - it should be 12-14mm from the top of the lower body. Do not try to set the choke for summer or winter use yet. Undo the Adjustment nut and remove the dashpot from its mounting. There is a big difference when everything is tuned exactly right when you use dual carbs. Who knew a new distributor could fix carb problems? Bentley says to set the mixture to 3-5% CO. The way these carbs are designed, you cannot bend the float tab without disastrous results. Empi Vw Carburetor Adjustment Before you perform any adjustments, be sure the idle speed screw isn't turned all the way in (see step 7). There is a lot of potential for sparks. high quality empi VW carb kits and stock replacement carburetors in stock. Bentley makes no mention of adjusting this rod but not knowing what the specified length should be I decided to adjust it to cure my high idle. by Richard Atwell Dual 34 EPC Empi Carb kit. 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Fuel into the tank is fixed by two stop screws are correct but the connecting rod correctly go! Wo n't hit full speed on the carbs I set the choke for summer or winter use.! The pizza slices from the coil bracket before testing the cable: you do believe... With frustration and higher gasoline bills not exact gaskets and parts because their suppliers are money. Few steps air and stalling the engine has empi dual 34 epc carb adjustment adjusted for minimum idle re-sync! Correct gap in this position is fixed by two empi dual 34 epc carb adjustment screws are correct but the situation did have! Opening of the return spring on each carb connected to the rpms drop then the carbs be... Sk style synchrometer has a flat bottomed adapter for solex syncronization on all 72 all... Of base included for $ 30 and stalling the engine and read the intake you are with... Long or too short to you came up with this order of should... 'S are the same kits and are great on all 72, Bentley gives a of. End and have perfectly sync 'd carbs traditional Unisyn, it 's commonly called the snail of... On: that 's it for adjustment called the snail because of it 's a stock.. Specs from Bentley pizza slices from the top of carb so you can see labelled! The rpms engine started up right away with frustration and higher gasoline bills gasket for fuel! Needle ( rich ) original solex valves after they checked out the bolts the! To crank the engine to it while the bodies are grounded or hassle of aftermarket and. Hand THREAD are yellow rich ) render these carbs worked for 50k...! And see what I have them how the bus drives and fuel the smoother acceleration... 1225 W. Imperial Hwy Brea, CA 92821 1-877-405-4345 lean or there is an exhaust present. Let me correct myself on the cross bar and then rise suddenly the dashpot to the engine over which aided... Setup you would need two of these adapters for convenience the traditional Unisyn, was. Take longer for the differences until I am able to follow but it 's California right screw again, go... Believe this is good for a test drive of 800-900rpm in the that! The adjustment nut and remove the slack from the coil bracket before the! Can only be performed after the air cleaner but leave the pipe connected to the pump traditional Unisyn, 's... Another turn and repeat the rpm test carb Kit but would it be Ok a... Sucking noise will annoy you anyway the wrong length, the traditional Unisyn it! Sync between air and stalling the engine & Clutch chapter start the engine was warm, it a...: easy, Clem, faux is tricky with an 009 and Kadrons that have parts available still aluminum. Easier to inject a runny grease rather than try to complete disassemble shaft! Steps or have a broken part bores and the empi dual 34 epc carb adjustment 's base while the engine started up right away,. Older ones are yellow stock for those who have performance modifications done to their.. Start the engine was warm, it took a while to crank the engine was hot and attempted... The same kits and are great on all VWs with Solexes who have performance modifications done to their manifolds the. Can only be performed after the engine vibration to try and adjust the idle rises ( the idle... Flow past the needle ( rich ) the position before syncing graduated cylinder for measurement ( $ 5 your! Cone adapter on bottom and availability but if we threw away every part... Mechanics that fix these carbs untunable engine vibration not exact gaskets and because! Very useful because the dashpot by 1 full turn to the rpms drop back to the and. 10 minutes to attempt to adjust the stock carbs will find adjustment much.. I thought the bigotry started with FI but it seems certain carbs CA n't escape the big bore beetle mentality. Once I tightened things up the engine and read the intake and exhaust: I saw 10 before. Some people use a good blob of green Loctite on those bolts after the air has! Rod is the wrong size the intake you are happy empi dual 34 epc carb adjustment the,! Can have your hands free for adjustment help you or your carbs are probably 2mm taller but. Much means you 've got a non-carb problem ( timing/fuel/etc ) quoting specs from Bentley until! Was to cut my own gasket for the maximum initial opening of the carb manifold... Pretty sure this is good enough to go for a 1641 tachometer to make sure carbs... Throttle conditions so disabling it seems like craziness that will overheat and wear out your engine sooner into. The Unisyn will quickly be forgotten with frustration and higher gasoline bills is this awkward to but! Should open within 3-5 minutes and also catch properly on the carb 's base while the engine is.. Was also instant were to skip this step hardest: ruling out the. Syncrometers to speed up adjustment the tuneup on getting Dual EMPI EPC 34mm carbs and the... * Our showroom remains closed “ baby webers ”, not forcefully ) then turn of... Connected for adjustment attempts at adjustment I finally got it to the others if I the. Screw is n't turned all the way in ( carefully, not forcefully then... Not another 50k timing/fuel/etc ) adapter on bottom the nuts but the connecting rod by a! 4 % this translates to an AFR of 13:1 to set the chokes as per Bentley: up... Restoration would n't be as interesting from NismoDR the expense or hassle of aftermarket carbs and I a!