Cubic Inches of Air?
Thread Starter
Registered User
Joined: May 2011
Posts: 3
Likes: 0
Cubic Inches of Air? Hey Guys,
I was playing with some forumlas this morning for my own curiousity and for a build I have been contemplating and I have run into something that I am unsure how to figure out on my own.
I was working on the volumetric efficiency formula this morning trying to figure out my own setup and now I am wondering (knowing that the stock LS1flows 311 cubic inches of air at 6200 rpm), how would I figure out what it flows if I swapped out the heads or heads and intake for example?
Thanks.
I was playing with some forumlas this morning for my own curiousity and for a build I have been contemplating and I have run into something that I am unsure how to figure out on my own.
I was working on the volumetric efficiency formula this morning trying to figure out my own setup and now I am wondering (knowing that the stock LS1flows 311 cubic inches of air at 6200 rpm), how would I figure out what it flows if I swapped out the heads or heads and intake for example?
Thanks.
Thread Starter
Registered User
Joined: May 2011
Posts: 3
Likes: 0
I think I just answered my own question. But does this sound right? - to figure out the volume of air moved in the engine (346 ci).
Take the size of the engine and divide by the volumetric efficiency.
Ex. 346 / 90 % is 311.4
I figured this by working the Cubic Inches of Air formula backwards. I was wanting to know because I have lost alot of the stuff I used to know I am getting ready to work on a friends car and I am trying to re-learn some things again.
Edit: Ignore the part about the heads and intake in the first post - I don't know what I was thinking about (to many things not enough space - I guess).
Take the size of the engine and divide by the volumetric efficiency.
Ex. 346 / 90 % is 311.4
I figured this by working the Cubic Inches of Air formula backwards. I was wanting to know because I have lost alot of the stuff I used to know I am getting ready to work on a friends car and I am trying to re-learn some things again.
Edit: Ignore the part about the heads and intake in the first post - I don't know what I was thinking about (to many things not enough space - I guess).
Last edited by 02 SS LS2; May 30, 2011 at 03:03 PM.
not sure what your trying to do but a ls1 flow way more then 311 CI of air at 6200 rpm
311 would be for one pen and close of all cylinders maybe per sec but. what good is any of this info to you
311 would be for one pen and close of all cylinders maybe per sec but. what good is any of this info to you
Assuming the 311 figure to be accurate , then that amount of air every 2 revolutions so 6200 r's would be 3100 times 311 in 1 minute , so 964,100 cu inches of air in 1 minute at 6200rpm's .
Thread Starter
Registered User
Joined: May 2011
Posts: 3
Likes: 0
I was trying to figure out a Volumetric efficiency formula earlier (before it is converted to CFM).
I'm getting ready to work on a project and I was brushing up on the math and also trying to figure out so of the other calculators I seen just for my own benefit of knowing how it is done.
I'm getting ready to work on a project and I was brushing up on the math and also trying to figure out so of the other calculators I seen just for my own benefit of knowing how it is done.
