First of all. The stock setup is very good at hauling a Kombi around. They are efficient, quite, and work well. They will give you more torque then a bigger carby upgrade. All round perfect for hauling a Kombi.
But if you must play with Carbs. DO IT PROPERLY. That unfortunately means spending money.
Get the best carbies you can. Make sure there is no slop in the shafts, if there is get them bushed. No matter the history buy new carbie kits and re-kit them (you can do this yourself) buy a book on it. There is a book that covers both Dells and Webs. Set the floats, and the fuel pumps to default levels.
Rebuild you dizzy while you are at it. A shagged dizzy will never tune properly.
Buy the best linkages. They are incredibly important. I would recommend getting rose jointed linkages. Rose joints are IMO better then ball joint linkages. Set the spring and the throttle pull to be in the same spot if possible to save flex in the linkages.
Use all new fuel hose and new fuel filter, drain the old crappy fuel outta your tank and fill it up with the fuel you will run your car on all the time, or the worst fuel you intend to use (unleaded not premium) you must tune the car to run on the worst fuel you will use, if you tune it to run on PULP then fill it Will ULP it will ping like mad.
Get the car running as best you can. And then ring up a reputable Dyno tuner (that still does carbies) in your area and book an appointment. Give your car to the Dyno tuner for the day and get them to tune it. they will change jets, tubes etc and set timing.
Pay your money. And drive home, feel the power.
And the most important point.
DON'T FIDDLE. Don't touch timing, jetting, idle jets/screws. Don't touch anything accept maybe the idle speed screw. You have just spent the $ for a pro tunned setup, you CANNOT DO ANY BETTER. If it's not right take it back.
The only way you can tune a car to run properly is on a Dyno. The dyno guys put a knock sensor on your block, and oxy sensor up your exhaust and change jets to tune it out based on the numbers across the rev range.
You can't tell the tune of a car by the colour of the exhaust etc anymore as unleaded fuel burns differently. you need an O2 sensor.
72TWINCAB wrote:I had twin dellortos and I found them more trouble than they're worth.
Dells are very good. IMO Better made then weber, and contrary to popular belief parts are still obtainable.
Akses in Brisbane has main jets, idle jets, tubes and kits for dells and Weber's. All reasonably priced.
72TWINCAB wrote:Yes you do get more power, but maintaining and keeping them tuned is a constant pain in the ass.
I got my Triple, yes Triple 44 Dells tuned on my "Day Car" 3 years ago and it still runs like a dream.
72TWINCAB wrote:Unless you know how to tune and maintain them yourself they will cost you a fortune.
They will cost you a fortune if you tune them yourself. If you set them a bit to rich you will get cylinder wash and thinned oil which could lead to a rebuild (not cheap) or at best poor fuel economy (fuels not cheap). Alternatively you could set them up lean which will cause over heating and pinging and therefore a rebuild = not cheap.
Carby Kits:
Akses in Brisbane.
Cheap as you can get them, they are a trade outlet.
Dyno Tuning:
Brisbane Tuning & Turbo Centre.
The only carby Dyno tuner I am aware of in Brisbane that is any good. There is another guy at Redcliffe that the Mini guys use but I can't remember the shops name. He charged me $300ish to tune the 240Z (triples) and that included jets, tubes and dyno time. So a twin carb might be cheaper.
If you get them done properly and don't fiddle they will be no trouble at all. My 240Z has been driving for 3 1/2 years and counting without being touched at all, and drives very well. Even if it is extremely over carbed.