Landracing Forum Home
October 21, 2017, 01:33:19 AM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News:
BACK TO LANDRACING.COM HOMEPAGE
 
   Home   Help Search Calendar Login Register  


(Note: Donations are not tax deductible)







Live Audio Streaming and Archives of Past Events
Next Live Event: TBD
Pages: [1]   Go Down
  Print  
Author Topic: Is this what I want  (Read 739 times)
0 Members and 1 Guest are viewing this topic.
wobblywalrus
Hero Member
*****
Offline Offline

Age: 64
Location: backwoods Oregon
Posts: 4394





Ignore
« on: August 16, 2017, 11:24:54 PM »

The power curve is from a dyno at elevation 150 feet.  It is a NA motor running on gasoline.  Note how the curve is climbing when it hits the rev limiter.  We lose peak power at B'ville.  Does the rpm at which peak power is produced lower?  If so this might be the curve I want. 


* 2017 Build 174.png (457.52 KB, 461x600 - viewed 66 times.)
Logged
Sumner
Global Moderator
Hero Member
***
Offline Offline

Age: 73
Location: Blanding, Utah
Posts: 3961


Blanding, Ut..a small dot in the middle of nowhere


WWW
« Reply #1 on: August 17, 2017, 11:33:58 AM »

Just a couple thoughts without knowing much about your setup.  What is your rpm drop between shifts, especially the last one or two?

You are making more HP above 7200 with the new power curve but less under it.  If you drop much lower than 7200 on those last shifts then you might not have the power you need to climb back up where you are now making more power.  If your rpm drop doesn't go below 7200 then I think your new found power will be quite noticable  grin.

If you haven't figured out your rpm drop between shifts one of these spreadsheets will give you the info you need for shifting at any point...

http://purplesagetradingpost.com/sumner/bvillecar/bville-spreadsheet-index.html

... go down the menu to the one that fits your application,

Sumner
Logged

RansomT
Sr. Member
****
Offline Offline

Age: 58
Location: Georgetown, KY
Posts: 459





Ignore
« Reply #2 on: August 17, 2017, 07:50:20 PM »

I would assume it works just like what I see on the dyno.  As the barometric pressure drops, the entire curve makes less power.  The shape of the curve including the peak TQ/HP remains the same, just a lower reading.
Logged
wobblywalrus
Hero Member
*****
Offline Offline

Age: 64
Location: backwoods Oregon
Posts: 4394





Ignore
« Reply #3 on: August 20, 2017, 09:02:51 AM »

That is what I assume, too.  It would be nice to verify if it actually does this or if there are other changes to the torque and power curves we do not know about.  A power and torque curve set from a NA engine dynoed near sea level and at SLC might be exactly what I need to look at.   
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!


Google visited last this page September 24, 2017, 07:10:13 PM