Quote:
Originally Posted by DougD
I can't believe you guys let him get by with the 40hp quote. Same cam, same specs, just a roller lifter vs a flat tappet give you 40 more hp. My BS buzzer just went off.....
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Doug, search some other forums if you want to get a second opinion. You can probably search this one as well, I think I've heard Keith Craft say the same thing.
The key here is that you can't really have the EXACT specs between a flat tappet and a roller camshaft. The .050/seat durations and the lifts may be simliar, but the weight of the lifters, the ramps needed at open/close, etc., cause the lobes to be designed differently. The amount of horsepower that you can get from a swap can be significant.