Cylinder Head w/math
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- Опубликовано: 8 фев 2025
- THE MATH:
377.6 cfm @.800
320 fps w/pitot
5.600 port length
280cc port volume
2.4 = constant
377.6 x 2.4 = 906.24 / 320 fps = 2.83in²
377.6 x 2.4 = 906.24 / 2.95in² = 307 fps
5.600 x 16.387 = 91.8 / 280cc = 3.05in² Avg CSA
5.600 x 16.387 = 91.8 / 3.05in² = 297 Avg FPS
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You have a PHD in port flow design ! Not many people with the amount of experience and knowledge you have doing this work. 👍
Port speed and velocity beats flow numbers every day. Good job
Thanks!
God I remember your words so clearly, " Math does not lie." I'm still learning.
This is gold info
Larry is the MAN! 320 is really fast but I guess with such a high port (18) it can be 🙂 I know on the dirt bike stuff we had high fps and it liked it
Real Nice Chad ! Thanks for your videos and Race Math Tech Shared. Brian R.
Great information sir
I have a few questions concerning your math. 1. Is the 2.4 constant good for all porting applications? 2. Is the average port length measured at the center of the throat area or the nearest edge? 3. Where does the 16.387 come from? That wasn't explained in the video. Is it another constant? Looking to port my Summit (Dart) Vortec heads to see if I can get them to flow at least as good as the Iron Eagle 180 cc heads. I have been looking for this info for a while, thanks for sharing!
1. Yes constant is for all applications.
2. Port length is the seat to the opening top and bottom divided by two. You are after the centerline.
3. 2.4 comes from (144 sq.inches / 60 seconds)..
16.387 is also a conversion factor in converting cc's to cubic inches and vice versa.
Killa job Chad love the videos🤙🏻🇦🇺
Wow I'm going to subscribe to your content, to try to absorb and learn. Thankyou for the education.
great video chad thank you
Always enjoy your vids
Get Your own Head blanks Cast up, offer an as cast version budget version with those Ports.
New subscriber 🔥🔥🔥
Hey Chad,I'm looking to start a build for my drag car here in Colorado, I love my small blocks, I like your 13 degree stuff,is it too large for a 421ci n/a?,I haven't started my build yet,I wanted to start with cylinder heads, its a 2800lb car,my last combo was a 23 degree 421 with Brodix raised runner Weld tech heads,best et here at Bandimere, I'd like to go alot quicker.....
How did you physically measure the the port though?
Hi Chad from down under, great video man ! You do some seriously good work ! Is it just me though or are your last 2 formula's in your description off ?
What air speed do you want on the apex of the short side at lift?
Is there a rule or relation between throat size and cam lift ?
320 fps is my main standard fantastic
If the Port's Ceiling and Floor lengths are utilized to obtain average port velocity as well as minimum CSA, then why arent these #'s available to the average joe? Head mfg's should post those #'s on their website!
because the average Joe would A. be absolutely confused by this stuff and b. you should be asking the guys who are doing the work what head you should be using on your application if youre buying heads from guys like Chad
Did you ever get your hands on a set of the TrickFlow 18* to see if they were the same or more capable?
I'm sure they would have made some of their own revisions, question is what and was it worth it?
Are the port measurments of the short and long turn radius
(4.500 + 6.700) ÷ 2 = 5.600
used in determining initial port volume sizing? If so, how?
Great
fluid manometer doesn't glitch, and is the most accurate when calibreated correctly.
I have never figured out how to calibrate a vertical manometer.
Chad , I have these heads . How much for the large program you have sir? Thanks for your time 😎👍
I wish I understood the translation of the math into cross-s.ectional area better
Is the 16.387 a constant too?
yes
16.387 is also a conversion factor in converting cc'c into cubic inches or vice versa