Compression
Talking about CR I wondering your thoughts on this, a point I made in post #31, that keeps come back to me when I see conversations about cams cr and low end torque and it's hard to find a lot of dyno evidence in the 1500-2500 rpm range, but something doesn't add up to me.
I'm not really seeing the lack of torque in what dyno evidence I can find.
Like obviously bigger cams give up low end torque and lower cr gives up torque everywhere, but engines only seem like they can only go so low in torque (per cid) even at lower rpms like 1500-2500 rpms.
Guess question is there a minimal and or a non functional torque level around 1500-2500 rpm? guess it would be higher rpms for real big race cams. It just seem like were talking more about a cam with overlap not like operating at X rpm not necessarily the torque amount.
Eg. Cause even a 440 with very weak low end cause of big cam and low cr probably gonna have more torque than a /6 still. A stock /6 don't need a lot of gear and stall to function normally :) and a big cammed 440 even with enough cr still gonna require a stall.
On the low end torque production, what you’re seeing in the videos and articles is the inability of the dyno to properly load and give an accurate reading. That is also coupled with the know perameters of the engine, which is more than likely a camshaft and etc…. That doesn’t make good power or at least not the point of focus under a certain rpm.
A good example of this is you have a cam that is 260@050, what’s the concern of how much torque you’re making at 1500?
If you’re concerned, there’s a problem and it’s not the engine or dyno.
If your cam is 200, 208, 218@050, the dyno will read it. The more radical the cam, the more the dyno has a problem loading at a low rpm.
Cam and compression are one think that is linked together in the package. Cylinder head flow is t really part of it in the basic question asked by the OP. But as 99% of the threads here, topic drift.
What does cylinder head flow have to do with compression outside of chamber size, IDK. You just keep on chasing that rabbit down its hole. Why? IDK. Not that it doesn’t lead to interesting thoughts and discussions…..
IDK (Again) if the OP is finding this curve Beneficial or not.
I hope he is.
