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Originally Posted by VFR750
After 5 years of carbs on a 3.0 I can say the list is 100% accurate.
Honestly, they are a love/dislike thing. (Hate is too strong a word here).
There is no doubt there is added power especially with a cam change. They look awesome and have a vintage look that make you smile and garners a lot of positive atention.
But the intake noise can be irritating of if the carbs are out of adjustment. I measured over 95db inside the car honking around. Full throttle is closer to 100db.
Fuel mileage is definately worse. But highway cruising can be ok. 20 mpg at 65+. Around town is where you suffer because you have to run them rich to handle throttle motion.
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Spot-on right there!!!
Throttle response on any 6-throttle intake is light years better than the CIS system when properly set up. This applies to carbs, MFI and EFI.
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Changing to carbs is really expensive when you add in all of the changes that are needed. Plus alternate jets. While not as expensive as efi. I'm not sure if I haven't already spent the equivalent of a efi system with the tweaks, rebuild, manifold upgrade and recently a cam.
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EFI certainly delivers better fuel economy, however Engine Management is much more expensive when you factor all the hardware and the time needed to properly program it.
Carbs certainly aren't for everyone simply due to ideosyncrasies that few people now understand and are willing to deal with (cold starting is one). Plus, it takes patience to fine tune them for best drivability.
Smog compliance is a big obstacle for anyone living in CA with a '76 or newer car.
Carbs offer excellent performance, however I am very careful about recommending them to my clients, depending on the individual.
