Ok.. How much LBS min does the 2.7L motor of ours ingest every Min.

Thread Tools
 
Search this Thread
 
Old 11-13-2004, 12:55 AM
  #1  
AudiWorld Super User
Thread Starter
 
Johnny Bravo's Avatar
 
Join Date: Jun 2000
Posts: 5,382
Likes: 0
Received 0 Likes on 0 Posts
Default Ok.. How much LBS min does the 2.7L motor of ours ingest every Min.

2.7L TT @ conditions :

22 PSI ( nice target PSI )
4000 RPM ( youd want to make full boost by then )
110 deg F intake temp ( ok iat )


what do you guys come up with.. Ill compare it to my notes..

Im trying to match a turbo.

Looks like the GT22 would be most up to this task.
Old 11-13-2004, 02:28 PM
  #2  
AudiWorld Super User
 
Mike2kS4's Avatar
 
Join Date: Jun 2002
Posts: 12,088
Likes: 0
Received 0 Likes on 0 Posts
Default Taking your question literally ~32lbs of air per minute/~420cfm for 2.7l@22#@4000rpm.

This info really won't help you at all in sizing the turbo properly. You're going to have to do calculations for many points on the compressor map to find out if you're anywhere near the ballpark.

Hint: In our cars a GT22 will fall flat on its face well before a K04.16 will.

Edit: Redid my calculations taking ambient temperature into account, knew I forgot something, not much of a diff though
Old 11-13-2004, 07:05 PM
  #3  
AudiWorld Super User
 
Imolavirus@BuehnEngineering's Avatar
 
Join Date: Mar 2002
Posts: 17,933
Likes: 0
Received 0 Likes on 0 Posts
Default

what volumetric efficiency is that at?
Old 11-13-2004, 10:09 PM
  #4  
AudiWorld Super User
 
Mike2kS4's Avatar
 
Join Date: Jun 2002
Posts: 12,088
Likes: 0
Received 0 Likes on 0 Posts
Default 90%VE at 70degF with a 2.5DR.

Best guess of VE at that RPM. It should peter down to the high 70's near redline as RPM increases.
Old 11-13-2004, 11:06 PM
  #5  
AudiWorld Super User
 
Imolavirus@BuehnEngineering's Avatar
 
Join Date: Mar 2002
Posts: 17,933
Likes: 0
Received 0 Likes on 0 Posts
Default

i was going to say....i got lower numbers but i was using 80%VE
Old 11-20-2004, 06:46 PM
  #6  
AudiWorld Super User
 
Audeye A6's Avatar
 
Join Date: Dec 2003
Posts: 4,246
Likes: 0
Received 0 Likes on 0 Posts
Default

OK mathmatichians time to smoke a bowl and relax!
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Sully
TT (Mk1) Discussion
1
04-02-2007 03:58 PM
[ej257]
A4 (B5 Platform) Discussion
2
02-08-2002 10:51 PM



Quick Reply: Ok.. How much LBS min does the 2.7L motor of ours ingest every Min.



All times are GMT -8. The time now is 09:31 PM.