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dellorto

  1. Jetting Dellorto DHLA40 vs. DHLA40H

    The Classic Alfa Romeos
    Hi all, I’m in the process of swapping over a pair of Solex carbs for a pair of DHLA 40H carbs on a 2.0L Alfa nord engine (S2 spider). I’ve checked all the jets, and have the following: Idle emulsion + jet: 7850.3 emulsion, 0.50 jet Main emulsion + jet: 7772.7 emulsion, 1.35 jet This appears...
  2. 1.7 16V boxer Dellorto RA Throttle body O-rings

    Alfa 33, Sud & Sprint
    Hello! I'm looking for the correct O-ring sizes for the throttle body's idle air bypass screw(if there is one), and for the synchronising gauge vacuum ports. I have recently purchased a 146 with 1.7 16V boxer. (I think there are more people here with this engine than on the 145/146 forum) It...
  3. Rebuilding Dellorto

    The Classic Alfa Romeos
    I'm just in the process of rebuilding a set of dhla 40f carbs for a 2 litre gtv, I've got the Haynes manual as reference for Jets and emulsion tubes but has anyone got any ideas tips that they used in regards to the jetting of this model of carby, cheers.
  4. Twin dellorto 40mm

    The Classic Alfa Romeos
    Hi I'm going to try to reconnect the choke cable on my 1982 GTV with twin 40 mm dellorto carburettors, can someone tell me if the cable only goes to the carby closest to the firewall or connects to both carbys,if someone could post a picture of their setup I'd appreciate it,cheers.
  5. Dellorto carburettor fuel pressure

    The Classic Alfa Romeos
    Hi, I am new to carburettors, so please be gentle with me. I have a 1975 Alfetta with a 1750 Nord engine in it, running with a pair of Dellortos and the stock FilterKing regulator/filter. I recently rebuilt the regulator, removing all the varnish and crud, and the decomposing seals, and fit a...
  6. Dellorto Drip alfasud

    Alfa 33, Sud & Sprint
    Has anyone got any experience with the Dellorto drip? At least I think that's what its called, when the engine is running it drips fuel from the pump jet down the carb. I have set the fuel pressure to 3 on the regulator How do you fix it? HELP!!! https://www.youtube.com/watch?v=C7lpKLCL28c...
  7. Performance Fuel Filter for 33 16V but With Dell'Orto's

    Alfa 33, Sud & Sprint
    Good Morning, I have my 33 running on Carbs rather than Fuel Injection and Performance is a difference, only problem is in Malta we have BAD Fuel, The stuff I find in my fuel filter (Sand, Rust, Some Guey Stuff), anyhow till now I've been using an in-line fuel filter about 6 micron but if the...
  8. Dellorto jetting for 1300 nord?

    The Classic Alfa Romeos
    Anyone know the factory jetting for Dellorto 40DHLA fitted to 1300 Nord? Picked up a set of 40s with 28 chokes off a Alfa so should be near enough to get up and running for a rolling road session, just wondered if anyone knew so I could check...do they follow Weber sizes?
  9. Dellorto "drip"

    The Classic Alfa Romeos
    As you may have gathered from my extensive thread I had a problem with lumpy tickover, I've checked or changed everything ignition and fuel wise and while she runs very sweetly in all other conditions she just will not idle smoothly, I'm trying to ignore it as everything else is lovely but its...
  10. Dellorto throttle body synchronizing, idle synchronizing

    Alfa 33, Sud & Sprint
    good day :) i see lots of alfas are rebuilded, but no topics about synchronizing. topic is about 33/145/146 1.7 16v Dellorto throttle bodies, electronic injection. is it so easy for you, or do you give it for someone else to make it? i have to make it from the beginning, idle is horrible...
  11. Dellorto Pump Jet adjustments?

    Alfa 33, Sud & Sprint
    Never paid much attention to the pump jets much as long as they all pump when you blip the throttle. Was looking at the small nut on the end of the push rod with spring that actions the diaphragm. I noticed on one carb the nut was screwed in much further than the other. I evened them out a...
  12. Twin Dellorto Throttle Cable

    Alfa 33, Sud & Sprint
    Hi have just finished swapping my single carb sud S3 engine with a twin dellorto engine out of a 33. Unfortunately I cant see a way of using the single carb throttle cable and cant find a twin carb cable locally. Has anyone modded the single carb cable to work? Pics would be great. Otherwise...
  13. Help with dellorto carbs

    Alfa 33, Sud & Sprint
    After much head scratching, I've accepted defeat and have to ask for more help with my carbs in the sud. After rebuilding the carbs and solving some other problems, I've been presented with a new issue that has me stumped. The car idles perfectly but dies as soon as i apply anything other than...
  14. Dellorto needle valve differences

    Alfa 33, Sud & Sprint
    Just curious of the pros and cons of the 2 types of needle valves on the Dellorto DRLA carbs. I currently have new spring loaded type needles. My old ones I removed were the original fixed type. Which is better? If any. Cheers
  15. Idling fast when hot! Dellorto carbs

    Alfa 33, Sud & Sprint
    I have a problem with the rpm. When the engine has been working hard on the motorway and it gets up to a good temperature the idling surges to about 1350 rpm when I stop. If I wait it may take 1 minute or so to get below 1000 rpm. I thinking an air leak on one of the carbs - either one of the...
  16. Dellorto DRLA 40 parts prices

    Alfa 33, Sud & Sprint
    Evening lads, I have just been pricing up the stuff I need to rebuild and re jet my carbs and I come out at 150 quid inc. postage and VAT:wow: If anyone has come across these parts cheaper or has jets and choke lying around please please please give me a shout! I have a pic of the prices I...
  17. Dellorto DRLA 40 Manual?

    Alfa 33, Sud & Sprint
    search removed - Forgot all about this... Evening Gents, I have found technical manuals for dcoe and dhla carbs but cant find one for my drla's I'm looking for somthing like this How to Build and Power Tune Weber and Dellorto DCOE and DHLA Carburettors Speedpro Series: Amazon.co.uk: Des...
  18. Dellorto 40's

    Alfa 33, Sud & Sprint
    Anyone looking for a matched pair ? Send me a PM, looking for around £200 May swap for early sprint parts :)
  19. Twin Dellorto Carbs Vacuum Advance Question

    Alfa 33, Sud & Sprint
    Good Afternoon, Been a while busy with a new job... anyhow I got some time to finally pay some good attention to my 33. Anyway after replacing a gunged up Fuel Pump I noticed that when I remove the Vaccum Advance tubing from the Left Carb or from the Distributor, nothing happens in terms of...
  20. Dellorto float finally given up after 23 years of service

    Alfa 33, Sud & Sprint
    Installed a new pair of floats in my DRLA carbs this week. Old one had a crack in it but wasn't at the point of flooding luckily. I set them at the same height of the old ones but it was obvious the old ones were much less floaty than the new ones. Way too lean. Adjusted them 1mm higher and a...
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