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
Fair enough guess
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.
If you assume a lot. Let’s look at the rpm peak hp.
Where does it happen?
This you can not answer.
Again with how efficient it is.
This you can not answer.
Where is peak torque?
You can not answer that.
All of this is you trying to justify yourself without enough information & being precise in the estimate. Then you use math to justify which is bad math because you assume much.
Why do you continue to argue your right when you don’t have enough information to even possibly be in the ball park?
Oh! You mean in English it is to say; “Thin Air!” Gotcha! LOL
COOL
Thats is an eg.. guess of peak hp at 5500 rpm
That’s a big guess.
Most dyno graph I've seen tq falls around 85-95% at peak hp rest is just math
Remember that - Most I’ve seen statement.
Just point out there mathematics that fit even with a guess
Nope!
You used his name in justification
Did I promise 100% accuracy, just how to mathematically guesstimate. And how does this make me right or wrong.
You were being precise with bad math and guessing & assuming big time.
This doesn't need to be contentious, Why does this bug you so?
It doesn’t bug me. Not one bit. I’m calling you out on a HUGE ASSUMPTION and very bad math.
But you could be right!
It doesn’t have to on going. But you can’t resist and must prove yourself being right and arguing with me on your bad choices and making assumptions with it being backed by math.
This thread is going down in flames with your steadfast belief your right and using math as proof and a continuing of your postings.
You’re not helping. Your hurting. You do no homework. You just assume. If you took a wild *** guess and just wrote 440hp/430lbs. Tq. and let it ride, that would be one thing but you just assume and assume and assume without asking a decent question to the OP about his engine.
You Assumed a camshaft, his lift is correct or is it the listed lift for an LA cam and no further math correction was done which leads to the cylinder head flow capability. What the heck is the head flowing? IDK - WTH a stage 2 porting is! Is there a 3 or 4?
Without knowing the cam specs, actual lift, cylinder head flow and IMO, header size would help if not what’s being done with the exhaust piping, your just pissing in the wind.
But of course, as you demonstrated, these factors do not matter because your math proved it all unworthy of being known or cared about.
I presented these questions to the OP to better understand the engine’s potential of power and you don’t give a flying F! But just continue to drill in what the average guy does and engines make. While the OP may indeed be an average guy or a new fella not knowing anything, how do you know a really smart fella did t build the engine and select a really good cam for the tasks at hand?
You don’t! Ask some freaking questions and help out instead of stomp on people for potentially being average or less then. Get your *** out of the calculators and into the real world. I’m tellin ya that you really know how to **** on people. Your some kind of special.
And another funny thing, you always cry about me being mean and mad when we have these conversations. Truth of the matter is, I just sit here and shake my head on most of the utter crap you post up as if you have been there and done that. I roll my eyes and say to myself, this poor guy, WTF is he thinking and what planet did he call from?
Sincerely, I thought you were not only smarter than you post but a way better person.
Truly, sincerely, best of luck with your crate engine.
but so is guessing out of thinair, but yes there's variables. I was given an eg.. to the OP if he knows what rpm he built for how to mathematically guesstimate.
