LMan said:
Ive never heard this before.... a hyd flat-tappet running 'rougher' than a solid-lifter cam.. Can you elaborate?
Performance hydraulic cam compared to a performance solid of the same specs, both flat tappet:
The hydraulic will idle rougher, have less vacuum, less throttle response, less torque throughout the range, a narrower power band, and far less tuning needed than a solid lifter cam.
For a solid cam to act the same as a hydraulic in respect to idle, vacuum, low end torque, etc... it would need 20* more duration at .050".
The big drawback to solid cams is that they require more attention to detail and maintenance than the hyd version. That is why hydraulic cams were developed.
Porkchop:
All the hydraulic cams mentioned so far will diminish vacuum needed to run power accessories.
I like the idea put forth about using the Comp Extreme Energy that is one step below the XE284.
They are a very aggressive lobe design and dual pattern.
The C can use a dual pattern cam, and one step lower would give you back vacuum. Also, considering the weight of your car and stall converter, I think you are looking at too large cams. If you do go with one of these 280-somethings, you should probably look at more stall and more gear.
270H or 274XE got my vote. XE more than the other.
Then you can keep your street manners, stall, 3.50 gears, etc...
Dave