Go Back  AudiWorld Forums > Audi Models > Audi allroad
Reload this Page >

Turbo Lag is not a buzz word - Tip Lag is not Turbo Lag: Even more tiresome thoughts... =)

Notices
Audi allroad Discussion forum for the original Audi allroad

Turbo Lag is not a buzz word - Tip Lag is not Turbo Lag: Even more tiresome thoughts... =)

 
Old 10-09-2002, 10:52 AM
  #1  
AudiWorld Super User
Thread Starter
 
Join Date: May 2002
Posts: 3,833
Default Turbo Lag is not a buzz word - Tip Lag is not Turbo Lag: Even more tiresome thoughts... =)

Turbo Lag -- By the laws of this universe, pressure in the intake manifold must be built up over time, and can not be instantaneously raised to a fix point above ambient air pressure. This time delay, between no boost and max boost, is Turbo Lag. For the period to elapse, engine RPMs must build, exhaust gasses generated, and the turbos spooled.

Tip Lag -- I've heard several different things referred to as "Tip Lag".

a) Car at stop, brakes applied. Brake lifted and Gas quickly applied. Car doesn't go. --> This seems to be software related. Accellerator pedal position does not immediately correlate to fuel delivered. The earliest of allroad reviews claimed the throttle was too touchy from a stop in offroad situations. Audi has apparently addressed that, to an extreme.

b) Car rolling slowly. Gas applied. Car takes time to build rpms, boost, etc... --> This isn't an inherant design problem with either the transmission or the turbos. Any car will bog if it's accellerating from too high a gear, and too low a position on the Tach. Just use that tip button.

c) Car doesn't accellerate as fast as a 6-spd. --> That's the torque converter, which necessarily loses some torque as heat - while introducing a delay in the torque delivery... can't do anything about that, short of buying a manual. ;-)
itacud is offline  
Old 10-09-2002, 11:17 AM
  #2  
New Member
 
Join Date: Apr 2002
Posts: 284
Default your a) is what I notice, and I believe it's intentionally programmed into the chip(s).

...and p.s., my 1999 Saab 9-5 V-6 with asymmetrical light turbo had NO discernible turbo lag. Of course there must have been a lag (see physics lessons above and below) but all those steps took place within the envelope of perception.
Ting and CSR is offline  
Old 10-09-2002, 11:37 AM
  #3  
AudiWorld Senior Member
 
TheLex's Avatar
 
Join Date: Oct 2002
Posts: 1,605
Default Big Question - if throttle has been intentionally "desensitized"...

then how can we change that? Would it be a mechanical change or can we do it via software? For if your (a)is really true, we should be able to correct it!
TheLex is offline  
Old 10-09-2002, 12:12 PM
  #4  
New Member
 
Join Date: Oct 2002
Posts: 309
Default

Is buying a manual the only answer? Why did my previous Turbo Volvo show no lag?? Just asking.
mazzy is offline  
Old 10-09-2002, 01:37 PM
  #5  
Junior Member
 
Join Date: Jan 2002
Posts: 1,576
Default I find turbo lag quite short, and not really a problem...

It's TIP lag that's the problem, mostly under full or nearly full throttle, from a standstill or slowly moving. The dealer says my ar has the latest TCM.
ar2002 is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
morrisond
S4 (B9 Platform) Discussion
30
01-01-2016 06:50 PM
hardipk5
Audi 90 / 80 / Coupe quattro / Cabriolet
17
11-24-2015 03:42 AM
BriGuy01-2.7T
A6 / S6 (C5 Platform) Discussion
37
10-22-2015 08:04 AM
brjones
A4 (B8 Platform) Discussion
0
09-23-2015 09:32 PM
Al_Bundy
Parts For Sale
0
09-02-2015 07:24 AM


Thread Tools
Search this Thread
Quick Reply: Turbo Lag is not a buzz word - Tip Lag is not Turbo Lag: Even more tiresome thoughts... =)


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: