by Hauge » Fri Aug 22, 2008 3:40 pm
Anthrax or cholera ??
The Rochester is the "better" carb, no doubt about it. That means it has the capability of running smoother, draw less fuel etc.
But better is not always better. The rochester is more complicated which means it has a higher learning threshold. If you get into problems tuning it, your much on your own (at least here i sweden). Jets are harder to find, spareparts as well.
A holley is an "ugly" design for a carb... for example: big shallow float containers (cant find the right word now), which makes it sensitive to centrifugal/accelleration forces. Only one main jet, with a fixed sized jetting for the power valve, which makes some kind of pseudo double jetting. If you manage to get GOOD milage on a holley, you are lucky or has sacrificed a few hp on the top.
Whats positive with the holley is low build height, a lot of knowledge on the net, pretty cheap parts, modular design, easy to make it work decently.. works almost always right out of the box.
In essence if you know somebody with great knowledge of the rochester or can afford to pay someone or you have great patience/time or can buy one with the right jettings go with the rochester.
Personally I live with the milage on my holley the few summermonths we have in sweden. Well a holley is not foolproof either, right now i´m trying to persuade my reversed idle holley to accept my camshaft at idle.
that´s my cents
Let´s see if i have stirred up a bee´s nest
-76 Monza 2+2, 400", 8.8 rear ... if Ispell funny sometimes, Its because I´m Swedish and Hauge is a Norwegian name