Magnum 360 build. (HP/tq?)
This how I Guesstimate and was sharing my method if one chooses to use it, the dyno guy from engine masters uses a similar one but based on 1.25lbs-ft and 90% so you just got to guess peak hp's rpm and math the rest.
The main variables are
What rpm peak hp will happen
How efficient lbs-ft per cid
And tq % at peak hp, rest is just math, tq x rpm / 5252 = hp, which is how I think and make sense of things.
Thinair
Your reply was off base and half way to insane & here’s why I think your response should not been.
“What rpm do you think peak hp will happen at?”
You’re asking someone asking us because he doesn’t know where leak torque is going to happen? This is stupid. How can you ask a guy this very question when that is his question?!?!
Unbelievable!!!!!
I was given an eg.. to the OP if he knows what rpm he built for how to mathematically guesstimate.
“Say 5500 rpm you can kind of figure it out,
Say = eg..
an average guy build is gonna make 1.15 to 1.25 lbs-ft per cid so say 1.2 average x cid = 438 peak tq.”
How do you get peak torque at 5500? There is absolutely no basis to get this number but only through assumption.
Thats is an eg.. guess of peak hp at 5500 rpm
“tq at peak hp averages 90% of peak tq so 394 tq x 5500 rpm / 5252 = 413 hp @ 5500 and 438 tq around 1000-1500 rpms lower.”
Again, only under gross assumptions can this work.
Most dyno graph I've seen tq falls around 85-95% at peak hp rest is just math
You have no idea of head flow, exhaust flow, header size, cam duration @.050 or advertised or the overlap. Is this an LA cam or a Magnum cam…. Ground on what lobe series?
What size carb is he using?
Your making guesses through assumptions.
That's why I said say/eg 5500
And the. You defend it and even worse you drag GTX John into this? Dang! You got some balls kid. Some set of balls dragging GTX John into defending you and using his guess as a crutch as a defense on being correct.
Un-freakin-believe- ABLE!
Just point out there mathematics that fit even with a guess
If you assume a lot of factors. And you did.
And now I see you blaming GTX John?
How did I blame him?
WTF?
Is this a “Anything to be in the right” thing for you?
Did I promise 100% accuracy, just how to mathematically guesstimate. And how does this make me right or wrong.
This doesn't need to be contentious, Why does this bug you so?