1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Carbies

Discussion in 'Performance' started by 77bay, Apr 11, 2012.

  1. 77bay

    77bay Active Member

    Messages:
    1,361
    Location:
    Woody Point
    Just rebuilding a 2 litre for everyday use. What is better, dual 40 IDFs or single 32-36 progressive? Any bigger progressive kits available?
    Motor is slightly warm, want to keep fuel economy reasonable but want the option of pickup if needed. Had 40 DCN webers on the last one, drank like a sailor! Any opinions/info?
     
  2. Kai

    Kai Well-Known Member

    Messages:
    4,793
    Location:
    Sydney, NSW
    stock carbs if you want fuel economy. Kadrons (single throat, twin carbs) could be an option available as 40s. although i've never tried them. I have twin 36 DRLA dells and they chew the fuel on my otherwise stock 1800 auto.
     
  3. vassy69SC

    vassy69SC Active Member

    Messages:
    995
    Location:
    Brisbane
    36 or 40mm in Dellorto or Weber can return good fuel economy(12l/100km in my single cab) if tuned well. The venturi size is as critical as jetting. Send/post me some info on your motor and I can make some recommendations. Info needed includes heads (valve sizes), cam and exhaust. My wife's 1640cc Dormobile returned around 14-15l/100km over our 5000km trip around Tassie and would have weighed well over 2 tonne with the 4 of us and our gear. Foot was close to the floor around Tassie. :)
     
  4. kombijohn

    kombijohn New Member

    Messages:
    3
    Location:
    Sunshine Coast, QLD
    Hi. I'm going through the same decision myself. RECARB in kawana (sunshine coast) have recommended the 32-36 single progressive and said this has worked well on 2L kombis. I want to do more homework first. Good luck with yours. Keep the post going. Cheers, John
     
  5. Kai

    Kai Well-Known Member

    Messages:
    4,793
    Location:
    Sydney, NSW
    Read posts on the samba regarding single, progressive carbs.
     
  6. 77bay

    77bay Active Member

    Messages:
    1,361
    Location:
    Woody Point
    Having the motor rebuilt by Gary at Contis'. 104 cam slightly bigger pistons. Gary has only done 2 single carb setups in his time and had good reports. Checked the samba etc but still in two minds. Less hassle with a single, cheaper setup, better economy wise. Maybe lose a little topend speed at the 120km but does that really matter?

    Will post more on specs when they are finalised, thanks for input so far guys. All is very helpful.
     
  7. courty

    courty New Member

    Messages:
    103
    Location:
    Adelaide
    Now I am no expert when it comes to carbies on Kombi engines, but I do have a thought. My Escort RS2000 came out of the factory with a Weber 32/36 DGAV, progressive carb. A common upgrade to a stock engine was to fit a 38/38 DGMS, sycronous carb, and I do have one in the shed for my escort. Typically in an escort you see better low down torque and a increase in top end power, add a cam and its a different story. It seems that the 32/36 DGAV gets a mention from time to time, has anyone played with a 38/38, with slightly larger barrells and the sycronous operation and it will bolt to the same manifold as a 32/36. Just a thought and maybe a good option for those wanting to steer clear of twin carbs.
     
  8. Radar15

    Radar15 Active Member

    Messages:
    1,084
    Location:
    Brisbane, Queensland
    Single carbs on a Type IV never work (the fuel can't atomise properly) so they may be cheaper, but you will never get it running right. Invest in a set of Kadrons and have a well running bus.
     
  9. vassy69SC

    vassy69SC Active Member

    Messages:
    995
    Location:
    Brisbane
    Dual carbs are not shrouded in smoke and magic tricks.
    Be courageous and take the step. I guarantee you will not go back to a single carb.
     
  10. ian.mezz

    ian.mezz New Member

    Messages:
    376
    Location:
    newcastle
    buy a couple of real Weber's , multi carburetor are the closest thing to fuel injection, Brockie's commodore used 4 Weber's.:cool:
     
  11. Kai

    Kai Well-Known Member

    Messages:
    4,793
    Location:
    Sydney, NSW
    Alfa1750 or something on eBay has 40idf real Italian carbs. Got a set of 36 drlas last year
     
  12. DakDak67

    DakDak67 Guest

    Dual Webers rock!! instant throttle response and a huge fuel bill...... love'm!!
     
  13. kombiwhisperer

    kombiwhisperer Member

    Messages:
    146
    Location:
    fraser coast queensland
    It's all about the set-up, after 30 years as a proffessional I am still learning---
    Your engine has to have sufficent airflow to run whatever carby combination you want to fit.
    The problem with the progressive manifolds is they pool fuel in the joins, give you false mixture readings and drink heaps of juice as a result.

    If Ibuild a 96 bore 2lt, with Hi-torque cam, tidy heads and slightly higher compression, tight deck height, the biggest I run are 36IDF's with small venturis for road use.

    One of my customers went to Albany and back and averaged 12l/100, at 105/115km/hr
     
  14. 77bay

    77bay Active Member

    Messages:
    1,361
    Location:
    Woody Point
    Leaning towards 36mm Delortos. Should give a mix of power and economy hopefully.
     
  15. vassy69SC

    vassy69SC Active Member

    Messages:
    995
    Location:
    Brisbane

    Good choice.
     
  16. I had a progressive linkage dual throat solex on My bus a looong time ago before I bought my 40mm dellortos and I get waay better economy, throttle response and performance with the dellortos!!

    If your motor is stock(cam,heads etc) then you can run 40mm dellortos but as Marcus said you have to set the jetting and Venturi size accordingly. I'm running 34mm vents on 40mm carbs but I've got a cam change and ported and flowed 1800 heads as well. On a Stocko depending on condition of everything you would run say 28-32mm vents and jet to suit. You will need less throttle to actually accelerate cause the engine has a throat for each cylinder.

    The myth that dual carbs are no good exists because people buy carbs and bolt them on with no set up and it doesn't run properly or they buy something that passion fingers have butchered!!

    Would you buy any old rim to fit on your kombi then find it doesn't fit right or has the wrong stud pattern? Same applies to carbs. Do your homework first and find what you need to make them work properly not just get it to run.

    My dearly departed grandfather drove an ex army 77 bus for years with a 2.0l type 4 with 40mm dells on it and loved the economy he got even towing his boat!! He liked he could stay in 4th and accelerate up hills without the need to change down to 3rd.
     
    Last edited: May 7, 2012
  17. 66 deluxe

    66 deluxe New Member

    Messages:
    291
    Location:
    North Brisbane
    Dual Dellortos 45 DRLA's on a 2270 type 4 in my bug i get over 300k's to a tank which is about 30 litres i think. This is sitting on 75-80mph the whole time.
     
  18. vassy69SC

    vassy69SC Active Member

    Messages:
    995
    Location:
    Brisbane
    Nice Damo ;)
     

Share This Page