Turbo lag
#5
turbo lag happens with the pedal is initially pressed down around 2 thoudsand or lower rpms and doesn;t have enough exhaust pressure to spin the turbo fast enough to build boost...at around 28-29 hundred you create enough pressure to spin the spool fast enough to create a pressure which gives you the boost....every turbo has it,but its not somehting that increases with time
#6
it's an annoying characteristic with single turbo engines. if you want to spend some coin, do this:
1. milltek high flow cat and cat back
2. chip w/ new diverter valve
3. AWE front mount intercooler (just for power gains)
mod 1 and 2 will reduce the lag. mod 1+2 will help even more.
1. milltek high flow cat and cat back
2. chip w/ new diverter valve
3. AWE front mount intercooler (just for power gains)
mod 1 and 2 will reduce the lag. mod 1+2 will help even more.
#8
When I got my 2007 A4 - I was sincerely worried because I found tip in throttle response to be...difficult due to the "lag".
For another unrelated transmission issue, they flashed my TCM to level 50 (From 35). I can actually feel the software difference.
It now sort of "bleeds" off the power as the car revs slowly in city traffic, almost no neck jerk now....hell, the only way I know it's a turbo is when i'm on the highway...and go VROOM.
For another unrelated transmission issue, they flashed my TCM to level 50 (From 35). I can actually feel the software difference.
It now sort of "bleeds" off the power as the car revs slowly in city traffic, almost no neck jerk now....hell, the only way I know it's a turbo is when i'm on the highway...and go VROOM.
#9
turbo lag happens with the pedal is initially pressed down around 2 thoudsand or lower rpms and doesn;t have enough exhaust pressure to spin the turbo fast enough to build boost...at around 28-29 hundred you create enough pressure to spin the spool fast enough to create a pressure which gives you the boost....every turbo has it,but its not somehting that increases with time
http://en.wikipedia.org/wiki/Turbocharger
Turbos do tend to decrease over time as the the parts wear, EBC's even have a feature that allow you to help over come this issue. If a N75 valve is being used to control boost you could notice a drop in power since the ecu does not adjust for a drop in boost pressure, the problem is that the N75 signal to open is set and isn't based on boost that is actually being made like a EBC does.
Last edited by Mike-2ptzero; 07-12-2009 at 12:15 PM.
#10
Turbo Lag
A pair of turbochargers mounted to an Inline 6 engine (2JZ-GTE from a MkIV Toyota Supra) in a dragster.
The time required to bring the turbo up to a speed where it can function effectively is called turbo lag. This is noticed as a hesitation in throttle response when coming off idle. This is symptomatic of the time taken for the exhaust system driving the turbine to come to high pressure and for the turbine rotor to overcome its rotational inertia and reach the speed necessary to supply boost pressure.
pulled off wiki sounds just like what i tried to describe
A pair of turbochargers mounted to an Inline 6 engine (2JZ-GTE from a MkIV Toyota Supra) in a dragster.
The time required to bring the turbo up to a speed where it can function effectively is called turbo lag. This is noticed as a hesitation in throttle response when coming off idle. This is symptomatic of the time taken for the exhaust system driving the turbine to come to high pressure and for the turbine rotor to overcome its rotational inertia and reach the speed necessary to supply boost pressure.
pulled off wiki sounds just like what i tried to describe