gags_17 Posted July 6, 2011 Report Share Posted July 6, 2011 Hey fellers I keep hearing mixed emotions whethr or not a bigger carb or twin carbs is actually a good upgrade? Or just an excuse for ya motor to suck more fuel? Ive got a pretty worked 5k but the bloke I bought it off has left the standard carb on, He made mention of it having bigger jets, but will it be sufficient for the motor and its performance orientation? cheers guys Quote Link to comment Share on other sites More sharing options...
ae95- wagon kid Posted July 6, 2011 Report Share Posted July 6, 2011 pretty worked meaning what?? fuel+air= power if you have a stock 5k carb it will never be as performance orientated as twin webers or a single 32/36 If your motor is worked this may be the one thing lacking to give it that extra oomph that your motor needs Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted July 6, 2011 Report Share Posted July 6, 2011 Have you had it over a dyno with an oxy sensor? First you should see if the jetting is giving you the best performance and fuel economy. It will spend 99% of its life running in the bottom 25% of the carb, so mixture is more important than carb size. If it is fine for mixture all through the range and you reckon its bogging down at higher revs then carb is too small. If you've fitted a ground cam & a set of extractors then a better carb will improve it further up the throtle range, and if you can be bothered with the hassle of the fitting and tuning then a Weber or twin SUs will be worth it. Quote Link to comment Share on other sites More sharing options...
gags_17 Posted July 6, 2011 Author Report Share Posted July 6, 2011 hey :) Umm worked meaning balanced,raised comp, cam of unknown specs, raised comp, harnened valve springs,hardened push rods and fairly extensive head work, So sounds like ill be needing a new a carb,were would be the best place to get a decent carb set up in melbourne? Id rather not use ebay if I can, thanks guys Quote Link to comment Share on other sites More sharing options...
gags_17 Posted July 6, 2011 Author Report Share Posted July 6, 2011 oh and no i havent had it on a dyno yet, car is still being restored only just got some push rods for it today :D Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted July 6, 2011 Report Share Posted July 6, 2011 Don't rush it then- have a look around & think about what carb you'd want to use and then wait for a bargain you're happy with while you get it sorted out and on the road. Usual suspects would be the Weber 32/36 or a single DCOE Weber (or twins if you're really made of money) or twin inch & 1/2 SUs. The downdraught 32/36 is the cheapest as it uses a stock manifold, but that's also where it gives some performance away. It may be that it runs really well with the setup on there, you never know... Quote Link to comment Share on other sites More sharing options...
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