MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: b21playa on November 04, 2011, 07:52:01 am
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Got my car booked in with midlandvw later today for a dyno run and tweaks to my bluefin stage 2 map.
Will post results later today, can't wait to see what it's running with sports cat, tbe, twintercooler and carbonio
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Good luck...
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My numbers for my next one is 6,9,19,21,36,43..... :chicken:
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My numbers for my next one is 6,9,19,21,36,43..... :chicken:
Thanks for the heads up, just off to get my ticket... :laugh:
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Looks like the dsg can not be dyno'd correctly, so jody logged boost/fuel/ignition to see if it's running ok
Found that it was lacking in boost, at points it was requesting 1.1bar, and only producing 0.7bar. He reckons it could be the Pcv valve which I changed today, but have sent him logs to see if there is any difference
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Looks like the dsg can not be dyno'd correctly, so jody logged boost/fuel/ignition to see if it's running ok
Jody needs to read up on how to dyno a dsg car or go elsewhere. :smiley:
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Looks like the dsg can not be dyno'd correctly.........
:signLOL:
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And the bonus ball is........... :laugh:
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Why is it hard or different 2 dyno a dsg cos my results were poor and mine stage1 & dsg ??
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And the bonus ball is........... :laugh:
REVO!!
DSG can be rolling roaded (stating the obvious), but needs a modicum of intelligence on the operators behalf.
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Why is it hard or different 2 dyno a dsg cos my results were poor and mine stage1 & dsg ??
Because of the DSG kick down at the end of the peddle travel you have to feed in the power. Nick from r tech says that cars with DSG software constantly give better results on a dyno.
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Why is it hard or different 2 dyno a dsg cos my results were poor and mine stage1 & dsg ??
It's not. If you change up and hold the paddle it disables the kickdown..... :rolleye:
Or learn where the kickdown point is. :smiley:
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Hold paddle? Which one?
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The one you've just changed up with Rich.
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Ohh right... Didn't know that... So will that let it bounce of the limiter?
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No I still think it lets the box change up at the redline.
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Yup it does. I tried on a logging run and it shifted up at about 6500rpm (can't remember exactly)
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I've been on a few dynos now with my dsg :stupid:
Bet it was low down the rev range where it didn't meet requested boost, quite normal as the turbo hasnt spooled properly. If its the old fashioned coast down dyno he might have troubles getting the transmission losses.
Either way you should be able to get an idea of power. My superchips stage 3 only managed 314bhp on a dyno dynamics rolling road, but managed 320bhp on a dastek coast down rolling road with a stage 1 remap :rolleye:
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Yup it does. I tried on a logging run and it shifted up at about 6500rpm (can't remember exactly)
Were you in manual mode?
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Makes no difference bacillus, it will still shift by itself at that rpm unless you have dsg software. By keeping the paddle pressed it only prevents it shifting down a gear
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I've been told that the RRds that use the rundown to calculate trans. losses are more accurate.
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They might be with manuals? The dastek one that I used is well known for putting smiles on faces anyway. Dsg boxes aren't supposed to be coasted in neutral anyway. Also if a dsg runs on the dastek ones, it totally cocks up readings for any manual cars run straight after????
The bapro coast down dyno that shark has got is supposed to be accurate.
This topic was dsg boxes on dynos, just trying to figure out why he had problems
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I've been told that the RRds that use the rundown to calculate trans. losses are more accurate.
The tuning industry thinks otherwise (depending on dyno make/model) as the coastdown method doesnt actually measure a transmission loss. Some measure the loss as a percentage and applies this to guess at a flywheel power.
Take a car with 100hp at the wheels. Dyno measures a loss of 20hp during coastdown and applies this as a percentage so 20%, 120hp at flywheel. Add a turbo and nitrous and it makes 200hp at the wheels and apply the same 20% coastdown losses = 40hp to be added. Thats 20hp for free. Modern coastdown dynos use other factors but older ones use the above as a measurement factor.
Then look at what coastdowns measure, its not actually a transmission loss. The coastdown is often done in neutral, and sometimes in gear, either way its measuring a loss when the engine has no load on it, power must be tested while the engibe is under load, so this also applies to the losses. it cant measure losses through the tyres as during coastdown as the tyres are not having any force applied to them as they do under load during the run.
The day that Europe falls in line with Australia and the USA and uses wheel power will be the end of the dyno lottery.
I have had a car (380hp) on our dyno that has been on 5-6 other dynos and the actual wheel power has been within 10hp on all, and within 1 hp on another dyno dynamics. The estimated flywheel power has been +/- 15hp on other dynos and it was +56hp on the Dastek.
When comparing power figures, whp is the most accurate method.
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If anyone has problems with dsg during a dybo run just disconnect a rear ABS sensor, unplug the abs module under the bonnet or use vagcom, go into ABS measuring blocks or output tests and this helps run them properly.
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Yup it does. I tried on a logging run and it shifted up at about 6500rpm (can't remember exactly)
Were you in manual mode?
As has been said it doesn't matter.