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Old 12-23-2012, 12:01 PM   #12
Jim/GA
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Join Date: May 2010
Location: Young Harris, GA
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Default Re: Which New Cam,,,330 or 340

Quote:
Originally Posted by Marco Tahtaras View Post
Actually Bill doesn't make any new cams similar to the "A". The B 330 is his improvement on the "B" profile. For the basic 340 Bill says:

" 340Touring cam has excellent torque 1600 to 3000 RPM range. Best run with larger intake valves and Weber carb & 6 or 7 to1 C.R. Head."
Thanks, Marco! This was also my understanding.

I have a cam in my S/W Town Sedan right now (heavy car) that begins to build torque at about 1600 RPM. It is not an IB340, but it sounds like it has roughly the same torque curve. I also have large valves, HC head, balanced crank.

I don't like the way this cam forces me to wind the engine to about 2200 RPM before shifting. If I don't, then when I go into the next higher gear, the engine is below 1600 RPM and it does not have good torque until I slowly accelerate up through 1600 again. On the plus side, it really wakes up at around 2000 RPM! I can run in O/D at 2000 RPM (50 MPH) all day long.

The next time I have an excuse to open the engine up, it will be getting an IB330.
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