« previous next »
Pages: [1]   Go Down

Author Topic: HP motor potential/comparison tool  (Read 1510 times)

0 Members and 35 Guests are viewing this topic.

Offline

  • Nitro Hotsaw
  • *******
  • Posts: 759
  • Karma: 52

    • Total Badges: 22
    Badges: (View All)
    Third year Anniversary Level 5 500 Posts Apple User Second year Anniversary One year Anniversary
HP motor potential/comparison tool
« on: September 26, 2016, 08:30:51 pm »
...as it says.

opens in libre office or other spreadsheet type program.

-lets you compare one or two motors.
-lets you verify reasonableness of HP clams and/or potential.
-helps to see what is going on with geeky engineering terms.  hahaha.

hope it helps
-joe
Logged
hiatus

Share on Bluesky Share on Facebook

Like Like x 1 View List

Offline

  • Nitro Hotsaw
  • *******
  • Posts: 759
  • Karma: 52

    • Total Badges: 22
    Badges: (View All)
    Third year Anniversary Level 5 500 Posts Apple User Second year Anniversary One year Anniversary
Re: HP motor potential/comparison tool
« Reply #1 on: September 26, 2016, 09:07:10 pm »
the way it works, all that needs to be input is three things: stock rpm and hp and lastly motor size in cc. 

it calculates things like bmep, cfm, and some efficiencies.

there are some ranges that the numbers fall into.

then you can type in a new hp value for the same motor, and see if it can happen.

...if the new hp you want out of it is within these ranges, chances are it will work.

possibly more digital garbage.  this stuff helps me learn, hope it may help someone else as well.

Logged
hiatus
Like Like x 1 View List

Offline

  • Nitro Hotsaw
  • *******
  • Posts: 759
  • Karma: 52

    • Total Badges: 22
    Badges: (View All)
    Third year Anniversary Level 5 500 Posts Apple User Second year Anniversary One year Anniversary
Re: HP motor potential/comparison tool
« Reply #2 on: September 28, 2016, 08:37:36 pm »
jack kane's  web site reference material was used for the quick program. good stuff: 
Volumetric Efficiency (and the REAL factor: MASS AIRFLOW), by EPI Inc.
Unserdtanding the practical limits of Volumetric Efficiency and its value in estimating real engine performance
epi-eng.com


ranges used came from bsfc of the leanest stock saw i could find, and a saw used in prof. blair's book; ve from book as well.

a screenshot of the program follows:  (about the most that could be added was about 2 hp for this jonsereds 52, before it goes outside one of the ranges).
Logged
hiatus

Offline

  • 6 cube
  • ****
  • Posts: 209
  • Karma: 32

    • Total Badges: 21
    Badges: (View All)
    Level 5 Third year Anniversary Second year Anniversary 100 Posts 50 Posts Level 4
Re: HP motor potential/comparison tool
« Reply #3 on: September 29, 2016, 08:44:53 pm »
Hey Joe - I downloaded it but it will likely be a few days until I can look at it.  Looks interesting from your description.
Logged
Pages: [1]   Go Up
« previous next »
 

Related Topics

  Subject / Started by Replies Last post
6 Replies
6032 Views 		Last post March 09, 2011, 08:01:32 pm
by hamish
3 Replies
2414 Views 		Last post September 03, 2011, 12:03:47 pm
by man of stihl
5 Replies
1690 Views 		Last post July 15, 2012, 11:47:28 am
by Old Iron Logging
2 Replies
1706 Views 		Last post July 15, 2012, 08:18:23 pm
by Cut4fun .
41 Replies
3935 Views 		Last post February 28, 2013, 04:43:02 pm
by HolmenTree
2 Replies
1994 Views 		Last post August 18, 2014, 09:02:55 pm
by 1manband
7 Replies
2144 Views 		Last post July 09, 2014, 03:41:15 pm
by Cut4fun .
0 Replies
662 Views 		Last post February 06, 2015, 09:37:31 pm
by northern boy
5 Replies
3708 Views 		Last post April 04, 2016, 10:02:25 am
by 660magnum
0 Replies
754 Views 		Last post May 07, 2019, 01:30:49 pm
by Cut4fun .