Stroker specific cams?

nm9stheham said
YR, this is the OP's stated goal for this engine/cam on page 1 of this thread. I'd suspect this has a lot to do with the results... this project/design is not about peak HP.

FWIW..... The other thing about narrow LSA is that it is going to make your lower RPM engine operation less torquey. Yeah, I know, narrow LSA moves the torque peak down and/or extend the higher levels of the torque band down, and it does make the exhaust pull-through work better at 'lower' RPM's.. but 'lower' is all relative and is still up in what I would consider 'mid range' RPM's. Once you go low enough in RPM the exhaust pull through stops and the intake reversion goes up with a narrow LSA, and the torque is gonna drop off the table. That is a reason all of the catalog 'torque' cams have LSA's up on the 112-114 range. If you are running certain forms of engine operation, too narrow on LSA just hurts low RPM operation, regardless of carb or EFI. All depends on what you are doing with the engine.

It's all dependent on the combo. I've played with desktop dyno for years. I know there are some who think it's bullshit, but the better info you put in, the better the info that comes out. And without fail, on certain combos, especially mild builds, a wide LSA wins out every single time below 5000 RPM and that's where 90% or more of a street engine's time is spent. Yes, it's not as much of a peak torque number, but it's a flatter curve with more available torque, for a longer time, in some cases a lot longer time.

As I and many others including yourself have said many times and it falls upon deaf ears with all the "gurus" it all depends on what you're doing. My rule has always been look at all the factory high performance engines. Except for VERY few exceptions, the camshafts were ground on wide LSAs like 113-116 AND THEY WORKED and worked very well. Most times for a street car, the farther away you get from that recipe, the worse of a "street car" you end up with.

But of course, like I said, you caint tell all that to people who've done it all and know it all.