S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

Yes/No: Is it normal for boost to spike higher during cold, winter weather than during warm weather?

Thread Tools
 
Search this Thread
 
Old 12-15-2005, 07:24 AM
  #1  
AudiWorld Super User
Thread Starter
 
VandyS4's Avatar
 
Join Date: Dec 2003
Posts: 6,906
Likes: 0
Received 0 Likes on 0 Posts
Default

Yes/No: Is it normal for boost to spike higher during cold, winter weather than during warm weather?
Old 12-15-2005, 07:52 AM
  #2  
AudiWorld Super User
 
WindyCityS4's Avatar
 
Join Date: Mar 2003
Posts: 7,550
Likes: 0
Received 0 Likes on 0 Posts
Default

No. Colder/denser air should equal less boost.
Old 12-15-2005, 08:22 AM
  #3  
AudiWorld Super User
 
dscottjr's Avatar
 
Join Date: Sep 2002
Posts: 14,586
Likes: 0
Received 0 Likes on 0 Posts
Default But, you could see a higher initial spike. If the wastegate duty cycle is kept at the same initial

starting point, you're going to have more boost until it regulates downward. Thus, a higher initial spike.
Old 12-15-2005, 09:53 AM
  #4  
AudiWorld Senior Member
 
Chuck-S4's Avatar
 
Join Date: Sep 2002
Posts: 1,698
Likes: 0
Received 0 Likes on 0 Posts
Default With regular N75 and Motronic, no, you should in fact see LESS boost...

When I was using the N75 with GIAC X last year (Stage 2+), I could boost maybe 14 PSI instead of 17 PSI; the air being more dense = less needed work to obtain same results in term of MAF.

With a standalone EBC setup however, cold weather like today makes me smile! Cold air is like rocket fuel...
Old 12-15-2005, 10:36 AM
  #5  
AudiWorld Super User
 
Hal_TT::CBP's Avatar
 
Join Date: Mar 2000
Posts: 9,779
Likes: 0
Received 0 Likes on 0 Posts
Default ... and how! Watched my Omori full sweep yestrerday on a 4th gear spike.

Then again the Omori I have is not accurate over 1.3B I've found. Good thing x-)
Old 12-15-2005, 06:15 PM
  #6  
AudiWorld Super User
Thread Starter
 
VandyS4's Avatar
 
Join Date: Dec 2003
Posts: 6,906
Likes: 0
Received 0 Likes on 0 Posts
Default

I was aware that held boost would be less, but I really just meant the spike. thx dscott
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
A6EX
A6 / S6 (C5 Platform) Discussion
6
12-10-2007 04:04 PM
Nate (ETKA+Scumbag)
A4 (B5 Platform) Discussion
4
12-05-2006 02:56 PM
ModifiedA4
A4 (B5 Platform) Discussion
16
04-11-2006 11:45 AM
Silver_02_Rice Eater
S4 / RS4 (B5 Platform) Discussion
3
01-08-2004 08:17 PM
SwifTT
TT (Mk1) Discussion
2
11-05-2001 02:13 PM



Quick Reply: Yes/No: Is it normal for boost to spike higher during cold, winter weather than during warm weather?



All times are GMT -8. The time now is 01:31 AM.