Quote:
Originally Posted by metromizer
The problem with high compression and longer durations cams is exacty as has already been pointed out, you loose low rpm torque. I think there are several drivers, but reversion back up the intake tract is a huge one..
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The question is whether better mileage is possible lugging at 1400rpm with more torque, or whether spinning 2500rpm with high compression more efficiently. I consider it something "not closed" until better researched, and since I don't even know where to find such cams, and they seem to have been rare enough that only a few people even remember or ever had one.
A v8 with the torque of a v6? That's fine if it gets the mileage of a v6 too, especially if high RPM power actually remains and with the right gear it can still get up and perform. It may actually remain one of the easier ways to improve mileage on older setups that require too many other swaps to get mileage on. (ie changing transmissions, axle ratios, etc) It was a solution for it's day, and i'd like to see how it stacks up to modern ones. Perhaps there is some situation where it would actually still even be superior.