1. Carb Balancing Tool

Chit fund software excel. ImagesCategoriesDescriptionPriceU20 CarburatorPartnumber:2000 Carburator Information Special NoteIndividual 2000 carb pieces are located in this section. For kits go to section marked on the navigation bar 'Carburator Kits and Packages' or click, to go to the section.SEE TEXTU20 CarburatorPartnumber:Datsun Roadster Su 2000 2 Barrel High Flow Air Cleaner Assembly AFTERMARKET ENGLAND & AFTERMARKET USA2000 SU High Flow Re-Usable Air Cleaner AssemblyCan be purchased with or without velocity stacks. Price is for air cleaner, drilled back plate,gaskets a 3 retaining clips. Velocity stacks can be added to the order.Let your 2000 breath a little easier. Note: There is no provision in the back plate for PCV hose mounting. There are after market PCV filters that can be attached to your valve cover breather outlet. Venting directly into the air filter can damage the assembly.

Click to view Mikuni/Solex version of this assembly.$212.00U20 CarburatorPartnumber:Datsun Float Chamber Needle and Seat AFTERMARKET JAPANU20 needle and seat w/gasket.To order a PairOrder by PART# 1179PR $60.00Correct float level should never be assumed. Use the following, Z Therapy checking method, each time you change the float needle and seats or gaskets:Hold the float chamber lid so that the float lever arm is facing toward the ground and is fully open. Raise the arm up until the float needle closes. You can tell when it is closed if you blow threw the inlet tube and the air stops. The distance from the float arm to the bottom of the lid should be.550 of a inch.

Bend the tab on the float lid lever to achieve this measurement.$38.00EAU20 CarburatorR16 CarburatorCablesPartnumber:Datsun Roadster / Fairlady / 510 SU Choke Cable Assemblies -OLD STYLE GENUINE CABLE & BEZELNISSAN & AFTER MARKET USAOriginal choke cables with original looking Heavy Duty injection molded replica knobsThese Nissan choke cables are the longer 2000 choke cables. The longer casings can be trimmed when the ends fray.

Set up and balance twin SU carburettors.This page: Notes on the SU carburettor, basic tuning advice and hints on balancing twin carbsOriginal twin MC2 SU carburettors fitted to a Ford special, with the earlier type of mechanical linkages.This shot shows a pair of late 1.75' carbs fitted to an MG Metro engine, fitted under a Mini's bonnet. The mixture adjustment is different on these carbs when compared to the earlier type with brass adjusting nut underneath.Re-manufactured twin SU carbs fitted to a new Aquaplane manifold on this sidevalve FordAdvice on tuning twin SU carburettor setups from scratch Please note: All advice on oldclassiccar is just that, advice. If you have any doubts about your own abilities when it comes to working on your car, I'd recommend getting hands-on advice & help from someone who is used to working on old cars.

I can't accept any responsibility for mistakes you make, or things being damaged as a result of your working on a car after having read articles on this site. If in doubt, check with a marque expert first. You can find contacts for owners clubs in the club directory (see homepage).The advice on this page first appeared in a that I started on the subject of setting up a new pair of SU carbs from scratch. If you have any further comments on tuning SU carburettors, by all means join in on the site forum.Tips on setting up these popular carb installationsThe car I owned at the time had recently been fitted with a brand spanking new pair of SU carburettors. Annoyingly the engine was a pig to start, and a peek through at the pistons after I'd removed the air cleaners suggested that they were way out of balance, and needed a good looking at. I posted a question on the forum about how to initially set up the mixtures and idle on both new carbs.

The replies are summarised below:SU H and HS carburettors. 1: Unscrew throttle adjusting screw until the face just clears the stop. Open by screwing in 1 1/2 turns. 2: Remove Piston and Suction Chamber, disconnect mixture control wire, and screw jet adjusting screw until jet is flush with carburettor bridge (or full up if you cant). Replace parts, and check Piston falls freely on the bridge (by using piston lift pin).

Turn jet adjusting screw 2 complete turns (or 12 flats if accessibility and visibility is restricted, eg on Minis!). 3: Start engine, and adjust to desired idling speed (eg, warning light glowing). 4: Turn jet adjusting screw to obtain fastest idling speed WITH EVEN FIRING. 5: As the engine speed may have increased, readjust Throttle Adjusting Screw. 6: Check mixture strength. Use Lifting Pin to lift piston about 1/32”. A) If the engine speed increases, and continues to increase, the mixture is to RICH.

B) If engine speed decreases, the mixture is to WEAK. C) If engine speed momentarily increases slightly, the mixture is CORRECT. 7: The exhaust note should be regular and even. If it sounds ‘splashy,’ the mixture is too weak. If there is a rhythmical misfire, together with blackish smoke, it’s too rich.

8: Re-connect mixture control wire with about 1/16 inch free movement before it starts to pull on the cam lever. 9: Set Choke knob (on dash) to max. Movement (about 5/8 inch) without moving the carburettor jet, and adjust the fast idle cam to give a fast tickover, about 1000RPM.Thanks to UJ & UKD for the information given above, which is a useful starting point when setting up carbs, perhaps after a rebuild.

Carb Balancing Tool

If anyone would like to chime in with corrections, or additional information, then please do so, ideally via the thread on the forum (link above). Perhaps you are a master of balancing twin carbs using a length of tubing pressed to your ear, comparing the intake hiss of both carbies?