<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:<hr /><font size="1" face="Verdana, Helvetica, sans-serif">Originally posted by Banflu:
<strong>yes Rick... he does
need big carbs laughing
dunno about his present "chokes" though...
what are they anyway? the little "jets"?
</strong><hr /></blockquote><font size="1" face="Verdana, Helvetica, sans-serif">Banflu
It is not the body size (e.g. 40 or 45) which determines the airflow and therefore potential horsepower - it is the size of the main venturi or choke. I am just checking that the engine has been set up correctly on a rolling road, where by the correct choke can be established. If it has, and he already has the biggest choke fitted, then yes, he might want to upgrade. However there are a huge number of choke sizes to fit the Weber bodies.
e.g. On a 40 DCOE, you can get 24-36mm and on a 45 DCOE you can get 28-40mm.
So, you could have a 40 DCOE with a 36 mm choke and a 45 with a 28mm...... so the expense of "upgrading" to the bigger carbs will actually reduce performance until the chokes are changed.
Some people just buy the biggest number body with the assumption that it must go faster. It doesn't. Make sure he doesn't fall into this trap as carbs are too expensive to buy the wrong ones!!