997 Turbo / GT2 2006–2012 Turbo discussion on the 997 model Porsche 911 Twin Turbo.
Sponsored by:
Sponsored by: Bears Transport

New Datalog!!!

Thread Tools
 
Search this Thread
 
Rate Thread
 
  #31  
Old 05-03-2013, 06:38 AM
bbywu's Avatar
Registered User
Join Date: Jan 2007
Location: OR Room 5
Posts: 10,778
Rep Power: 1006
bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !
Originally Posted by Talisman013

Thanks, but isnt it 1.4 * 14.7 20.58psi?

EDIT: nevermind, checked, its 14.5037738

for a very long time I thought 1 bar was the same as atmospheric pressure (14.7)
I think you are getting lambda conversion confused with boost pressure. 14.7 is the stoichiometric conversion of lambda.

Take a look at the sticky I made on the top of this forum, "Tuning with Durametric."

https://www.6speedonline.com/forums/...ic-primer.html
 
  #32  
Old 05-03-2013, 07:28 AM
nevert00fast's Avatar
Registered User
Join Date: Jun 2008
Location: Long Island, NY
Posts: 533
Rep Power: 39
nevert00fast is infamous around these partsnevert00fast is infamous around these parts
Originally Posted by bbywu
I think you are getting lambda conversion confused with boost pressure. 14.7 is the stoichiometric conversion of lambda.

Take a look at the sticky I made on the top of this forum, "Tuning with Durametric."

https://www.6speedonline.com/forums/...ic-primer.html
I think the standard atmospheric pressure is 14.70(14.696) PSI at sea level, since the value is identical with Stoich and so close to 1 bar/14.50 psi it's confusing.
 
  #33  
Old 05-03-2013, 08:23 AM
bbywu's Avatar
Registered User
Join Date: Jan 2007
Location: OR Room 5
Posts: 10,778
Rep Power: 1006
bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !bbywu Is a GOD !
Could be. Usually, I take the measured atmospheric pressure at idle, and subtract that value from the measured pressure during the run. The difference is the additional pressure produced from the turbos.

Since weather, altitude changes the numbers somewhat, the idling pressure seems more accurate to me.
 
  #34  
Old 05-08-2013, 11:01 PM
AriS4's Avatar
Registered User
Join Date: May 2010
Location: Los Angeles
Posts: 466
Rep Power: 56
AriS4 has a reputation beyond reputeAriS4 has a reputation beyond reputeAriS4 has a reputation beyond reputeAriS4 has a reputation beyond reputeAriS4 has a reputation beyond reputeAriS4 has a reputation beyond reputeAriS4 has a reputation beyond reputeAriS4 has a reputation beyond reputeAriS4 has a reputation beyond reputeAriS4 has a reputation beyond reputeAriS4 has a reputation beyond repute
I am VERY new to logging (just started to play with it...so excuse anything that sounds OFF) but
target .80 to .85 ?
Isn't that a bit on the ballzy - lean side ?

also looks like timing is having a hard time staying steady (or increasing or not falling off - ie - line 746 and on - could be knocking ? righ arond there the lambas are looking quite high too )
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
COBB Tuning
GT3/GT2
3
11-03-2015 08:39 AM
jyupitt1
991 Turbo
6
09-10-2015 03:56 AM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: New Datalog!!!



All times are GMT -6. The time now is 12:24 AM.