Volvo K24 turbo in audi application.

[Ross]

He beat me to the final bid... I forgot what time the auction ended and missed it

If he doesn't want to use it and decided to sell, drop me a line, but it would have to be by the end of May

I was hoping to see a write-up from prj on his experience with one by now, I am hoping to have a little first-hand experience of it this week

[Rocco]

Any updates on this turbo folks?

i know the guy who won the bid

he told me it, but he is not sure about if he will use the turbo or not

i would like to see more dyno draws about this special turbo

[s2_wot]

You could see previous purchase history which was in Spanish

Any updates on this turbo folks?

[Ruffiano]

You could see previous purchase history which was in Spanish

[Rocco]

so who bought the volvo turbo that was on ebay? someone spanish? 77 quid, thats a lot cheaper then a used rs2.

spanish ,why? can you see the name of the bidder?

[Ruffiano]

so who bought the volvo turbo that was on ebay? someone spanish? 77 quid, thats a lot cheaper then a used rs2.

[Ruffiano]

he dialed in his timing with a light. 53 is correct for his car. it should really be checked for all installations, small variations in flywheel reference pin locations will move TDC from the usual 57/58.





nothing wrong with that, it tops out at +40% anyway no matter what number you put in there. all that does is change how fast it ramps up under boost.



haven't seen anything different with this.

Thanks for chiming in Marc, Always enjoy your comments!

[a4kquattro]

Good start

Looking at the logfile some clean up in the configuration

Regarding trigger errors: TDC after trigger is 53? is this a new ECU? would expect to see 57 / 58 here

he dialed in his timing with a light. 53 is correct for his car. it should really be checked for all installations, small variations in flywheel reference pin locations will move TDC from the usual 57/58.

Coil charge time 30!

nothing wrong with that, it tops out at +40% anyway no matter what number you put in there. all that does is change how fast it ramps up under boost.

Map Corr set to 0 needs to be 100

haven't seen anything different with this.

[Jamo]

It's suppose to be for Alpha N correction but Pnanassy, GintsK and Mattias say it should be set to 100 so that it is ignored in any calculations

I'm sure Vas had a thread on it as well its linked to firmware 1.1.48

[Billman]

Good start

Looking at the logfile some clean up in the configuration

Regarding trigger errors: TDC after trigger is 53? is this a new ECU? would expect to see 57 / 58 here
Coil charge time 30!
Map Corr set to 0 needs to be 100

@Jamo
are you talking about the RPM/MAP Map Corr? What does it do? I have it set to 0 also.

[Jamo]

Good start

Looking at the logfile some clean up in the configuration

Regarding trigger errors: TDC after trigger is 53? is this a new ECU? would expect to see 57 / 58 here
Coil charge time 30!
Map Corr set to 0 needs to be 100

[Ruffiano]

you maybe have some trigger errors. At 3 minute you have an RPM jump that has nothing to do with the way the engine works.

Please try to make a log drive at 3000-3100 and press full throttle till 7000. That way we can see how your boost behaves and tell if the dip in the dyno run is caused by this.

that jump might be clutch slipping.

[Jamo]

Cheers

[prj]

What is the realistic max duty WGDC is it 90 or 100%?

Most Motronic documents state it is around 95%.
Only way to find out for sure is to use a scope.

[Jamo]

Motronic does not magically make your turbo surge. It's a purely physical process, and your engine management has nothing to do with it.
If you do not get surge on VEMS that means it's spooling slower.
That's pretty damn simple.

Reason you had horrid spool on Motronic, is because your tuner conveniently just set WGDC to 70%, and he did that everywhere for some reason, starting from 900 rpm.
Maybe because he did not know the axis values for the N75 map.
Correct way to map around surge is to set WGDC and target boost lower only in the area where there is surge, not all over the map and mess up spool. And there is no reason to set it as low as 70%... that hurts spool really badly.

In an aftermarket ECU, it would be correct to use gear-dependent boost control.

P.S.
You said you had surge at 2600 rpm. Well, in your Motronic target boost map, at 2600 RPM the target boost is max. Meaning literally "unlimited". I am sure if you do this on VEMS you will have surge too..

What is the realistic max duty WGDC is it 90 or 100%?