Dyno pull vs long duration WOT run.
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MBWorld Fanatic!
Joined: Jul 2005
Posts: 3,174
Likes: 19
From: London, UK
No longer stock '06 E55, A3 3.2 Quattro, GLE 400d, R107 280SL, Golf Polo
Dyno pull vs long duration WOT run.
OK so there we go.
How is a dyno pull different to a sustained WOT run (e.g. 1 mile drag) in terms of A/F ratio and fuel flow ....?
If fuel pressure is stable surely there should be no issue? Or are we hitting injector duty cycle limits on the longer runs...?
I am curious why we dont see evidence of this on a dyno pull.... even if it is for a brief moment.
How is a dyno pull different to a sustained WOT run (e.g. 1 mile drag) in terms of A/F ratio and fuel flow ....?
If fuel pressure is stable surely there should be no issue? Or are we hitting injector duty cycle limits on the longer runs...?
I am curious why we dont see evidence of this on a dyno pull.... even if it is for a brief moment.
MBWorld Fanatic!
Joined: Jun 2010
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From: Puerto Rico
2005 E55 AMG
In real life you are hitting a wall of air at 150mph+ that you aren't hitting on a dyno. This makes a HUGE difference. Some dyno's also put less stress on the car even in the low rpms ( like dynojets ) because the drum weighs less than the car.
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Joined: Jul 2007
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From: Houston/ Austin /Toronto / UAE / Minneapolis / Orlando /Cincinnati
Eurocharged Performance ML63 and TT lambo
OK so there we go.
How is a dyno pull different to a sustained WOT run (e.g. 1 mile drag) in terms of A/F ratio and fuel flow ....?
If fuel pressure is stable surely there should be no issue? Or are we hitting injector duty cycle limits on the longer runs...?
I am curious why we dont see evidence of this on a dyno pull.... even if it is for a brief moment.
How is a dyno pull different to a sustained WOT run (e.g. 1 mile drag) in terms of A/F ratio and fuel flow ....?
If fuel pressure is stable surely there should be no issue? Or are we hitting injector duty cycle limits on the longer runs...?
I am curious why we dont see evidence of this on a dyno pull.... even if it is for a brief moment.
this!!!!
Thread Starter
MBWorld Fanatic!
Joined: Jul 2005
Posts: 3,174
Likes: 19
From: London, UK
No longer stock '06 E55, A3 3.2 Quattro, GLE 400d, R107 280SL, Golf Polo
Ok so it's due to the load on the drivetrain at high speed. I'm curious why some of the "older" tuners dont play with the injectors ... E.g kleemann.... Is it because more recent cars have reached even higher outputs?
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Joined: Jul 2007
Posts: 5,459
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From: Houston/ Austin /Toronto / UAE / Minneapolis / Orlando /Cincinnati
Eurocharged Performance ML63 and TT lambo
I think that would be a good assumption. More and more people are going to bigger pullies and throttle bodies etc as well...
