Did some VAG-COM mass airflow testing tonight, with and without MAF screen, etc... (long)
05-03-2001, 06:23 AM
#23
Since the turbos need exhaust gas(air) to spin, so if you restrict the intake air,
the engine output wil be less, and the speed of the turbos will be reduced as well, because less air going in, means less air going out.( in theory). I don't see how they can overspin, when a large restriction can cause the turbos to actually pull a vacuum if the intake is blocked.
05-03-2001, 06:39 AM
#24
AudiWorld Super User
Join Date: Nov 2000
Posts: 4,219
Likes: 0
Received 0 Likes
on
0 Posts
This is true if the waste gate is always closed. But there is a band over which the waste gate ....
.... operates partially open. So, the first reaction to inlet restriction would be the waste gate closing more, allowing more of the restricted throughput of the engine to go to the turbo. And, all along the ECU senses WOT.
05-03-2001, 08:40 AM
#27
AudiWorld Super User
Thread Starter
Join Date: Feb 2001
Posts: 2,198
Likes: 0
Received 0 Likes
on
0 Posts
Interesting...
I'll have to check but I thought I saw as high as 180% load, but my flow rate never got quite that high. Now what variables go into the load calculation exactly? Also it was 80 degrees out, I suppose my flow rates might be higher in some cooler 40-50 degree weather.
Thread
Thread Starter
Forum
Replies
Last Post
back2black
S4 / RS4 (B5 Platform) Discussion
6
08-24-2004 06:04 AM
Qiish
S4 / RS4 (B5 Platform) Discussion
19
07-05-2004 12:12 PM
PSmalls::DoggieStyle
S4 / RS4 (B5 Platform) Discussion
11
06-07-2004 06:58 AM
