INSTALLATION INSTRUCTIONSWEBI

-• CARBURETORS i

READ AND UNDERSTAND ALLSTEPS OF THESE INSTRUCTIONS BEFOREBEGINNING THIS INSTALLATION.

V.W. BUS, VANAGON, PORSCHE 914ALL TYPE IV CARBURETED & INJECTED ENGINES

(Except Models 411,412)For Kit Nos. K1347, K1348, K1349Using (2) Weber IDF CARBURETORS

TOOLS AND EQUIPMENT PARTS SUPPLIED WITHNEEDED: INSTALLATION KIT

Combination, box or open end wrenches (metric) 1 - Hardware KitSocket set with 12 mm socket 1 - Throttle Linkage KitScrewdriver (regular and Phillips) 2 - Weber IDF CarburetorsPliers %" Drive Ratchet 2 - Intake ManifoldsGasket Scraper %" Drive Extension (10-12") 2 - Air FilterAssembliesRags %" Drive Swivel 1 - Fuel FilterCleaning Solvent %" Open-End WrenchKnife NOTE: Fuel injected applications mustGasket Sealer purchase a low pressure fuel

pump and a new distributor.

The following instructions are based on an engine in stock condition, if you have made modifications to your engine, some of the followingsteps may not apply to your application.

PRELIMINARY DISASSEMBLY FOR FUELINJECTED AND CARBURETED ENGINES.

1. Remove the vehicle's gas cap.

2. Disconnect the battery.

3. Remove the stock air filter and attachedcomponents.

4. Remove the distributor cap and ignitionwires. Identify the wires for correctreassembly.

5. Disconnect the throttle cable.

DISASSEMBLY FOR FUEL INJECTED ENGINES

(CARBURETED ENGINES GO TO STEP #13)

Stock fuel injection fuel pump MUST bereplaced. Before attempting removal of the fuelpump; either drain the fuel tank, orclamp off thefuel line BEFORE the fuel filter. Clamping isonly recommended if hose is in good condition.

6. Disconnect the electrical lead to the stockfuel pump. Remove the fuel pump bracketand pump assembly. (FIG. A) Replace thestock fuel filter, if necessary.

7. InstalI the replacement fuel pump, per themanufacturer's recommendations. Remove the fuel line clamp once the pump isinstalled. Check for fuel leaks.

8. Disconnect the metal fuel line to the injectors at the point illustrated in FIG. A. Installthe new filter supplied in the kit. DO NOTRECONNECT FUEL LINE.

1. FILLER CAP ASSEMBLY

2. EXPANSION TANKS

3. GRAVITY VENT VALVES

4. FUEL GAUGE SENOING UNIT

5. RUBBER GASKET

8. FUEL TANK SECURING STRAPS

7. FUEL TANK

8. FUEL FILTER

•«. FUEL PUMP BRACKET ASSEMBLY

•10. FUEL PUMP

>PARTS TO BE REMOVED OR PLUGGED OFF

INSTALLREPLACEMENT

FUEL FILTERFROM KIT

11. CHARCOAL FILTER BRACKET

12. CHARCOAL FILTER BRACKET

•13. INJECTOR SEALS

•14. INJECTOR RETAINERS

•IS. FUEL INJECTORS

•18. HOSE CLAMPS

•17. MAIN FUEL RIG

•IB. FUEL PRESSURE REGULATOR

•19. COLO START VALVE

20. TO AIR FILTER

21. FROM RIGHT COOLING AIR SHROUD

Legal in California ONLY lor racing vehicles which may NEVER be used upon a highway.

WEBER U.S.

V

9. Disconnect the fuel pressure regulator andplug itoff with the cap provided in the kit.

10. Disconnect all electrical components forthe stock fuel injection system. Either tapethe wires,or use tie-wraps to position themin a safe area. Tape all connectors to prevent any shorts.

11 Remove the mounting nuts and any otherhardware retaining the intake and fuelinjection system. Remove the manifoldsand injection housing as one assembly.Insert a clean rag in the intake ports andclean the mounting surface with a gasketscraper.

12 STOCK FUEL INJECTION DISTRIBUTORASSEMBLY MUST BE REPLACED. Disconnect and remove the stock distributor.Install the replacement distributor per themanufacturer's recommendations. PROCEED TO WEBER CARBURETOR INSTALLATION SECTION.

DISASSEMBLY FOR CARBURETED ENGINES

13. Remove the stock fuel lines from the original carburetors.

14. Disconnect the electric choke/idle cutoffsolenoid wire. (Insulate the wire connectors to preventanyshorts. These wireswillnot be used.)

15. Unbolt the stock intake manifolds andremove carburetors and intakes as oneassembly.

16. Insert a clean rag in the intake ports andthoroughly clean the mounting surfacewith a gasket scraper. PROCEED TO THEWEBER CARBURETOR INSTALLATIONSECTION.

WEBER CARBURETOR INSTALLATION

BENCH ASSEMBLY

17. Use the thread locking compound suppliedto install the carburetor mounting studsinto the flanges of the new intake manifolds. (NOTE: If thecorrect stud tool Is notavailable, the "double-nut"method can beused. Lock two nuts approximately 113 waydown the stud. Using a suitable wrench onthe top nut, tighten the stud into the manifold flange.)

18. Insert the throttle lever spacers and locknuts on each carburetor lever. (FIG. E)

19. Install the flange gaskets and carburetorson the manifolds. Secure them in placeusing the lockwashers and nuts from thekit. DO NOT OVER-TIGHTEN THE CARBURETOR HOLD DOWN NUTS. MAXIMUM TORQUE SHOULD NOT EXCEED 10FT/LBS.

20. Install the center pull-lever and the left andright extension arms onto the cross-bar sothere is 60° between the centerline of theseparts. Install the jam nuts onto the ball-ends and thread the ball-ends into eachend of the cross-bar. (FIG. B.)

,^S=60

LEFT EXT.ARM

-4-CENTERPULL-LEVER

-XCENTER

PULL-LEVER

FIG.B

RIGHTEXT. ARM

FINAL INSTALLATION

/ YT JAM NUT

•ALL-EKO

21. If spark plugs need to be replaced, installnew ones at this time.

22. Remove the rags from the intake ports andinstall the manifold gaskets from the kit.Install the left-side (Driver's Side) manifoldand carburetor first. Installation will be easier using a %" drive ratchet with a 10-12"extension and swivel. Secure the manifoldin place using the nuts from the kit. Installright side (Passenger's Side) manifold andcarburetor in the same manner.

23. Replace the distributor cap and ignitionwires.

24. Install the carburetor air horn assembly asshown in FIG. C on the left-side (Driver'sSide) carburetor, using the lockwashersand nuts provided. DO NOT INSTALLTHERIGHT SIDE COMPONENTS AT THISTIME. DUE TO THE LENGTH REQUIREDFOR THE CROSS-BAR TO SEAT PROPERLY IN THE BRACKETS, THE RIGHTAND LEFT SIDE ASSEMBLY OF PARTSCANNOT BE DONE SIMULTANEOUSLY.

AIR FILTERAND COVER

NUT

LOCKWASHER

AIR HORN

AIR FILTERBASE

GASKET

CROSS-BARBRACKET

GASKET

FIG. C

l

AIR HORNASSEMBLY

25.

26.

27.

28.

Install the cross-bar self-centering springinside the left bracket bushing.

Insert the left-hand ball-end into the leftbracket bushing and spring. Temporarilybrace the cross-bar up to perform step #7.

Install the carburetor air horn assemblycomponents on the right side carburetor.DO NOT BOLT DOWN COMPONENTS.Install the self-centering spring in thebushing. Unbrace the cross-bar and insertthe ball-end into the right bracket andbushing. (NOTE: Some repositioning ofthe bracket may be necessary to get crossbar to seat in bushing.) Once the cross-barhas seated, secure the air horn assemblyusing the lockwasher and nuts provided.

Adjust the cross-bar ball-ends to achieve a1/32" clearance between the bushingflange and ball flange. (FIG. D) Once theball-ends are adjusted correctly, lock thejam nuts in place.

FIG.D

29. Install the carburetor linkage rods on eachof the extension arms as shown in FIG. E

EXT. ARM

CROSS-BAR /

SET SCREW

FIG. E

AIR FILTER

THROTTLELEVERSPACER

LINKAGEROD

THROTTLELEVERNUT

THROTTLECABLE

NOTE: CHECK THROTTLE OPERATIONFOR FREE MOVEMENT. IF THERE IS ANYINDICATION OF STICKING OR BINDING,CORRECT AS NECESSARY BEFOREPROCEEDING.

30. Remove the plug from the fuel line. Installthe new fuel hose from the outlet of the newfilter to both carburetors using the tee-fitting and clamps provided.

31. . PORSCHE 914 VEHICLES ONLY: Removethe hex nuts and lock washers from thecase-half studs. Slide the throttle cablebracket over the studs and re-installthe lockwashers and hex nuts. Installthe cable housing in the threaded hole.Adjust the cable to the correct tensionand lock the cable housing nuts in place.

THROTTLE ^^gjCABLE BRACKET ^

HEX

NUT

LOCKWASHER

CASE HALF STUDS

FIG.F

THROTTLE CABLE

HOUSING NUTS

THROTTLE CABLE

HOUSING

32. Connect the carburetor return springs.BEFORE STARTING THE ENGINE TOSYNCHRONIZE THE CARBURETORS, BESURE CARBURETOR LINKAGE MOVESFREELY AND IGNITION WIRES HAVEBEEN REPLACED IN THE CORRECT FIRING ORDER.

33. Replace the gas cap and reconnect thebattery.

34. Start the engine and check for fuel andvacuum leaks. Correct if necessary beforeproceeding.

35. Synchronize and set idle mixture per thespecial instructions included with the kit.

36. After carburetor synchronizing is completed, turn the engine off and proceedwith throttle cable installation.

37. Install the throttle cable trunion andshortner as shown in FIG. F Align the center pull-lever on the cross-bar with throttlecable and tube. Secure it in place by tightening the set screw.

38. Position thestock throttle cable next tothe 41. CHECK FOR ADEQUATE CLEARANCEshortner and measure the excess cable to BEFORE CLOSING HOODbe removed. NOTE: BEFORE CUTTINGTHE THROTTLE CABLE, BE SURE YOUHAVE ALLOWED ENOUGH CABLE TOFIT If you should have any questions after readinq2£?J£[? SSJSPSHTES ^J?. HAVE th*se instructions please contact the Weber•fffi'&e* SCREW HOLD ,TSECURELY Technical Service Department during normalIN PLACE. business hours.

39. Once the cable is measured, cut the excess(if any). Insert the new cable end into theshortner. Lock the cable in place by tightening down the set screw.

40. Install the air filter assemblies.

6/86 445.1347-IN

CAMUMTORS i

WEBER CARBURETOR SYNCHRONIZING &IDLE MIXTURE ADJUSTMENT

CARBURETOR SYNCHRONIZATIONPROCEDURE

1. Remove the air filter assemblies

H 2. Disconnect the throttle linkage rods on ALLH carburetors.

WEBER MODEL DCOE

Fig. B.

3. Turn "out" (counter clock-wise) the idlespeed screw, (Fig. A), on each carburetor,until the tip of the screw is flush with thecasting. Check for binding or sticking ofthe throttle plates. With the idle speedscrew in this position, the throttle platesshould be completely closed in the bores.Correct any misalignment or bindingBEFORE proceeding.

4. Turn "in" (clockwise) the idle speed screw,on each carburetor, until the tip of thescrew just touches the carburetor lever.From this "contact" position, turn each idlespeed screw exactly one (1-) full turn "in"This is your preliminary set point.

AIR

BY PASS

SCREW &JAM NUT

AIR BY PASSSCREW &

.JAM NUTO)

IDLESPEED

SCREW

IDLE SPEED

SCREW

WEBER MODEL IDF-XE

Fig. AIDLE JETS

IDLE

MIXTURE

SCREW IDLE MIXTURESCREW

VAC.

PADVANCEPORT

7. To synchronize the carburetors, adjusteach idle speed screw (Fig. A) until a balanced airflow reading is obtained on theSyncrometer.

8. After the carburetors are synchronized,reinstall the linkage rods. If the linkage rodlength is not correct the throttle leverposition will be affected. To adjust linkagerod length loosen the right and left handednuts and turn the rod shaft to shorten orlengthen the rod as necessary. (Fig. B)NOTE: When linkage rods are properlyadjusted the Syncrometer reading will remain as originally set in Step #8. When rodsare adjusted, lock the rod nuts in place.

AIR BYPASS

SCREW &

JAM NUT , ACCELERATOR PUMPIDLE MIXTURE ADJUSTMENT NUTSCREW

AIR BYPASS

SCREW &JAM NUT

IDLE MIXTURESCREW

THE ABOVE VIEW TYPIFIES THE GENERAL LOCATION OFTHE IDLE SPEED, IDLE MIXTURE AND AIR BYPASS SCREWS.

THE EXACT LOCATION ON YOUR WEBER CARBURETORMAY DIFFER SLIGHTLY.

5. Install a Redline Syncrometer, or otherreliable synchronizing tool, according tothe manufacturer's directions.

6. Start the engine. CAUTION: Be sure theloose throttle-rods are not interfering withother linkage components.

SILVER NUT— RIGHT HANDED

GOLD NUT— LEFT HANDEDTHREAD

CARBURETOR SYNCHRONIZATIONPROCEDURE (Cont)

9. If idle mixture and idle speed adjustmentsare not required, turn engine off andremove Syncrometer. Replace air filterassemblies and this procedure iscomplete.

IDLE MIXTURE & IDLE SPEED ADJUSTMENT

This "Lean-Best" idle setting procedure can beused to adjust your carburetor in the absence ofan Infrared Exhaust Analyzer. Those with ananalyzercan set idlemixtureto the engine manufacturer's specifications.

10. Ifa tachometer is available, install it prior tostarting the engine. If a tachometer is notavailable, set idle mixture "by ear."

11. Startengine.Besure engine isat operatingtemperature and choke is not engaged.

12. Turn "in" (clockwise) the idle mixturescrew until the engine RPM begins to fluctuate on the tachometer. (If adjusting "byear," until a noticeable change in speed isheard.) (Fig. A)

13. Turn "out" (counter-clockwise) the idlemixture screw slowly, until the engine idlespeed becomes steady. Try to obtain theleannest setting without affecting the idlespeed. If necessary repeat Steps 13 and 14until the best setting is achieved. Repeatthis procedure for each carburetor. Try to maintain a balanced settingbetween all carburetors. EXAMPLE: Eachcarburetor idle mixture screw should bewithin Va turn of each other.

14. Once the idle mixture has been set, finetune the idle speed ifnecessary, to meet theengine manufacturer's specification usingthe idle speed screw. (Fig. A) Try to keepthe adjustment equal on all carburetors.

15. Recheck the carburetor synchronization ifany idle speed adjustment is made andcheck the linkage rod position.

16. Turn the engine off. Remove tachometerand Synchronizer. Replace the air filterassemblies.

Should any further assistance be required,please contact our Technical Assistance Dept.during normal busines hours.

r.s* *>

NOTES

__... ,. . .-...:. , •-,-,.-. - - -.WEBER. «• • i - CMBURfTCAS

WEBER CARBURETOR TROUBLESHOOTING GUIDEThisguide is intended for diagnostic purposes only. Specific procedures and adjustments should be

obtained from factory service manuals or carburetor specifications sheet.

Every Weber carburetor isthoroughly tested at the factory and meets highquality and performancestandards.

Since other engine component problems affect the performance of the carburetor, it is stronglyrecommended to perform the General Engine Checks section of this guide BEFORE making anycarburetor adjustments.

GENERAL ENGINE CHECKS

IGNITION SYSTEM:1. Cracked, broken wires2. Incorrect ignition wire location (firing order)3. Timing improperly adjusted4. Distributor cap cracked, arcing5. Low coil output6. Corroded plug terminals7. Incorrect vacuum advance hose connection8. Points corroded, wrong gap .9. Incorrect spark plug gap

EMISSION SYSTEM:1. Cracked, loose vacuum hoses2. Improper vacuum hose connections3. Faulty EGR valve operation4. Airpumpdivertervalve, anti-backfire valvefaulty5. Faulty PCV valve operation6. Dirty breather filters

• Charcoal canister• Valve cover breather• PCV filter (inside air filter assembly)

7. Faulty feedback system operation8. Vacuum delay valves (switches) faulty

FUEL SUPPLY SYSTEM

1. Dirty fuel filter2. Incorrect fuel pump pressure (1.5-3.5 psi)3. Restricted, kinked fuel lines4. Fuel lines in contact with hot surface5. Contaminated fuel

SPARK PLUG ANALYSIS

Normal spark plug condition is a sandy browndeposit on the insulator surface with no signs ofelectrode damage. The following informationwill help you analyze your plugs' condition.

OIL DEPOSITS — WET FOULING1. Worn piston rings, bearings, seals1. Excessive cylinder wear2. Leaking — damaged head gasket

BLACK CARBON BUILD-UP, DRY FOULING1. Fuel mixture too rich2. Dirty air filter3. Engine over heating4. Defective ignition wires5. Sticking valves, worn seals6. High carburetor float level7. Damaged, sticking needle and seat assembly8. Incorrect fuel pump pressure (1.5-3.5 psi)9. Spark plug heat range too cold

BLISTERED, BURNED ELECTRODES1. Spark plug heat range too hot2. Timing improperly adjusted3. Engine over heating4. Incorrect spark plug gap5. Burned engine valves6. Wrong type of fuel

INSULATORS CHIPPED

1. Incorrect spark plug gap2. Improper spark plug installation3. Severe detonation

PLUG GAP BRIDGED

1. Lead deposits fused to electrodes2. Engine over-heating3. Spark plug heat range too hot

GASOLINE FOULING

1. Distributor cap cracked, arcing2. Loose, broken ignition wires3. Low ignition coil output

ONCE THE ABOVE CHECKS HAVE

BEEN PERFORMED, THE FOLLOWING SPECIFIC PROBLEMS CAN BEANALYZED.

Pagel

:.c£fv»h-' iM?^m^im££m :*&•..•-:?:•&-•*:

WEBER CARBURETOR TROUBLESHOOTING GUIDE

ENGINE WILL NOT START

Over 90% of Engine Failure To Start Conditions areIgnition System Related

1. Open circuit between starter and solenoid, orbetween ignition switch and solenoid

2. Starter motor faulty3. Battery charge too low4. Low ignition coil output

ENGINE HARD TO START WHENCOLD — STARTS & STALLS

1. Incorrect choke operation {worn coil, electricalconnection faulty)

2. Fast idle speed too low3. Improper choke pull-off operation4. Low carburetor float level5. Timing improperly adjusted6. Damaged, sticking needle and seat7. Engine flooded

ROUGH IDLE,SURGING, MISSING, STALLING

1. Incorrect idle speed and idle mixtureadjustment

2. Timing improperly adjusted3. Vacuum leak4. Incorrect vacuum advance hose

connection5. Faulty EGR valve operation6. Faulty PCV valve operation7. Incorrect choke operation (coil setting)8. Improper choke pull-off diaphragm

operation9. Improper vacuum hose connections

10. Low carburetor float level11. Restricted, kinked fuel lines12. Restricted fuel filter13. Distributor cap cracked, arcing14. Loose, corroded, or broken ignition wires15. Damaged idle mixture adjusting screw16. Distributor shaft worn (loose)17. Faulty idle solenoid operation18. Restricted carburetor jets or airbleeds19. Restricted air, breather filters20. Worn valves and seals21. Incorrect spark plug gap

ENGINE KNOCKS, PINGING

1. Timing improperly adjusted2. Incorrect vacuum hose connections3. Distributor malfunction4. Carburetor jets too lean, restricted5. Low carburetor float level6. Poor quality fuel

REDLINE / WEBER

ENGINE KNOCKS, PINGING (Cont.)

7. Faulty EGR valve operation8. Faulty feedback system operation9. PCV system malfunction

10. Loose fan belts11. Faulty vacuum delay valve (switch) faulty

DIESELING, ENGINE RUN-ON

1. Faulty idle solenoid operation2. Carburetor linkage binding3. Incorrect idle speed and idle mixture

adjustment4. Timing improperly adjusted

HESITATION, POORACCELERATION FLAT SPOT

1. Vacuum leaks

2. Improper vacuum hose connections3. Timing improperly adjusted4. Low carburetor float level5. Loose, corroded or broken ignition wires6. Low ignition coil output7. Fouled, damaged spark plugs8. Incorrect accelerator pump operation9. Incorrect fuel pump pressure (1.5-3.5 psi)

10. Restricted, kinked fuel lines11. Restricted fuel filter12. Carburetor power enrichment system

malfunction

POOR LOW SPEED OPERATION

1. Indirect idle speed and idle mixture adjustment2. Dirty air filter3. Timing improperly adjusted4. Loose, corroded, or broken ignition wires5. Distributor cap cracked, arcing6. Restricted idle jets, air bleeds7. Incorrect carburetor float level

POOR HIGH SPEED OPERATION

1. Incorrect vacuum advance hose connection2. Incorrect distributor centrifugal advance3. Incorrect spark plug gap4. Incorrect carburetor main jets, air correctors5. Incorrect vacuum hose connections6. Dirty air and, or breather filters7. Incorrect fuel pump pressure (1.5-3.5 psi)8. Worn distributor shaft9. Worn distributor shaft

10. Incorrect carburetor float level11. Restricted, kinked fuel lines12. Restricted fuel filter

99907.012

wHHWEBER CARBURETOR SYNCHRONIZING &IDLE MIXTURE ADJUSTMENT

CARBURETOR SYNCHRONIZATIONPROCEDURE

1. Remove the air filter assemblies

2. Disconnect the throttle linkage rods on ALLcarburetors.

3. Turn "out" (counter clock-wise) the idlespeed screw, (Fig. A), on each carburetor,

"'until the tip of the screw is flush with thecasting. Check for binding or sticking ofthe throttle plates. With the idle speedscrew in this position, the throttle platesshould be completely closed in the bores.Correct any misalignment or bindingBEFORE prqceeding.

4. Turn "in'y(dtodkwise) the idle speedscrew,on each carburetor, until the tip of thescrew justnfSuches the carburetor lever.From this "contact" position, turn each idlespeed screw exactly one (1) full turn "in"This is your preliminary set point.

IDLE SPEEDSCREW

AIR BYPASSSCREW &JAM NUT

IDLE MIXTURE ADJUSTMENT NUTSCREW

WEBER MODEL IDF-XE

Fig. AIDLE JETS

AIR BYPASSSCREW &JAM NUT

IDLE MIXTURESCREW

THE AGOVE VIEW TYPIFIES THE GENERAL LOCATION OFTHE IDLE SPEED, IDLE MIXTURE AND AIR BYPASS SCREWS.THE EXACT LOCATION ON YOUR WEBER CARBURETORMAY DIFFER SLIGHTLY.

5. Install a Redline Syncrometer, or otherreliable synchronizing tool, according tothe manufacturer's directions.

6. Start the engine. CAUTION: Be sure theloose throttle-rods are not Interfering withother linkage components.

7.

(If tiie barrels of trie sasecarbar3 tor r.ave an equalreadingi :o to step j)

This step is for Weber Carburetors with AirBypass Screws ONLY, for all other WeberCarburetors proceed to Step #8.

(A) Loosen the jam nuts and close the airbypass screws on each carburetor(Fig. A)

(B) Each carburetor should be adjustedseparately. Use the Synchrometer todetermine which carburetor barrel produces the lower reading.

(C) Adjust the air bypass screw corresponding with the low reading barreluntil the Syncrometer readingmatches the higher barrel. Once bothbarrels of the carburetor show thesame reading, lock down the jam nuts.(NOTE: On Weber 3 Barrel Carburetors this process must be expanded toadjust the air bypass screws on the 2lowest reading barrels).

(D) Repeat Steps B and C for eachcarburetor.

8. To synchronize the carburetors, adjusteach idle speed screw (Fig. A) until a balanced airflow reading is obtained on theSyncrometer.

9. After the carburetors are synchronized,reinstall the linkage rods. Ifthe linkage rodlength is not correct the throttle leverposition will be affected. To adjust linkagerod length loosen the right and left handednuts and turn the rod shaft to shorten orlengthen the rod as necessary. (Fig. B)NOTE: When linkage rods are propertyadjusted the Syncrometer reading will remain as originally set in Step #8.When rodsare adjusted, lock the rod nuts in place.

SILVER NUT - RIGHT HANDED

GOLD NUT — LEFT HANDEDTHREAD

3/9Zf "" 609-60-05

CARBURETORSYNCHRONIZATIONPROCEDURE (Cont)

i If idle mixture anci idle speecI adventsare not required, turn eng fi|ter-Siln^SprocW.co.p.ete.

lDLEM.XTURE&.DLE SPEED ADJUSTMENT

used to adjust your carb^etor ^ an^al^nSe^u^etotheenginemanu-facturer's specifications.

Sanb91ethseet3Elare''byear:'rPe«a^K«e»:ng

£-^7. ^Sircriange'-n speed ft^eard.) (Fig-A)

„.-, A/A^kuf/se.) the idleTurn 'out" (c0"nX'ntTl'he engine idlemixture screw slowly, u"«"»* «tain tn,speed becomes steady, iry w |d„leannest setting without affecting ^speed. If necessary repeat b^epsuntil the best setting is achieve k^_this Procedurjlor ea=n ttin?retor Try to maintain a °*™£gr-. ££

within V. turn of each otner.

cneck the linkage rod position.

assemblies. _

12.

13.

14.

CARBURETOR^SYNCHROMETERAn extraordinary-newcalibration instrumentthateven works on mum-barrel, progressivecarburetors.

EASY TO READ numberically cali-Alarge, easy ^jeaQJ^ fast preci.

retort regardless of position.SECRETS JN THE SLEEVE meter is aThe secret to ^SgdSicuy into the carbure-mbberslewth^a^y seal Alltor air horn. ^J^SSSS^ the Synchrom-incom.ng air mustpass|""*g |etyou serv»ceS^At38SRSS« carburetors.

I

DUAL WEBER CARB KIT INSTRUCTIONS

1. Mount carbs on intake manifolds with the threaded studs, nuts and gaskets supplied.Be careful that carbs are mounted so that the operating arm is facing the back ofthe car onboth sides. Now mount the manifolds on the engine using the gaskets supplied. Use Partnumber 4505-11, Manifold Nut Set, for easier installation of all manifolds.. Be sure that themanifolds do not interfere with the fan housing or any part of the body. This will not allowthe manifolds to seal properly. Any leak can cause poor or uneven idle.2. Attach the fuel hose and "TEE" fitting supplied. The use ofafuel pressure regulatorset to 1 1/2 to 2 lbs is recommended. Note: The regulator must be Mounted before the"TEE".

4. Mount the throttle linkage per instructions supplied with the linkage kit used. A"TayCo" Cross Bar linkage kit for your carb kit is recommended for optimum performance.4. Each engine must bejetted individually to meet its own characteristics. Before starting any rejetting, the valves must be properly adjusted and the timing set correctly. Incorrecttiming and valve adjustment is the major cause of poor performance, and is impossible to getan engine jetted properly.Form 1088