Volvo K24 turbo in audi application.

[Ruffiano]

610nm a few I would say if they are running 1.9 bar chips

was not aware, this is a 1.9 bar set up and only sees 335 or 454nm

[prj]

how many rs2 turbos are making 360 ftlbs of torque at the wheels? which is right around 450ctq?

I make that torque on RS2 turbo with 1.8 bar without blown up engines...
And on K26/K27 more, and I have mapped lots of cars like this.

Also, 034 graphs are not the best example of what can be done with stock ecu. If you want a bigger name tuner than little noname me, then look at MRC.

This "600nm bends rods" stuff is an age old myth... Look at in-cylinder pressure transducer analysis in any internal combustion engine during knock. PCP can easily spike 500%.

[Jamo]

was not aware, this is a 1.9 bar set up and only sees 335 or 454nm

That is a seriously cr@p setup, on the Rolling Road days I did stock RS2's with 3" exhaust blew that out the water unchippped!

[Billman]

The problem was that it run at 2 bar with almost the same fuel that gave him 0.94 lambda at 1.1 bar.
So he run 2 bar with a lambda of approx 1.
EGO correction and the other EGT and IAT boost/ ign retard features where disabled.

I think that even with knock control it could not be avoided that easily.

However it is a nice feature.

[prj]

2 bar with lambda 1?
Yeah, knock control will not save you, unless you set up mad enrich/limp mode.

Also, the H-Rods will not save it either, probably the pistons will let go if they are not all already chipped and melted.

[Jamo]

Just checked the map and log why is ego disabled at 0% thats mad, lambda is off under load and the mat / fuel enrichment could do with some tuning. Use the default config as a guidline

[djh]

out of interest if thats 034 do they do anything any good?

[UrS4boy]

That is a seriously cr@p setup, on the Rolling Road days I did stock RS2's with 3" exhaust blew that out the water unchippped!

Umm...Jamo those are *wheel* not crank numbers.

[Jamo]

Umm...Jamo those are *wheel* not crank numbers.

I'm aware of that they are STILL low, to me any US dyno figure I see are equivelant of european crank figures, I've yet to see evidence otherwise

[prj]

Umm...Jamo those are *wheel* not crank numbers.

Even then, not that good...

I also strongly disagree with this:


But hey, garbage in, garbage out, right?

[prj]

Anyway, if the K24-7400 car was really running close to lambda=1 at full boost, then that explains everything and I think there is nothing further to discuss.

I just hope the engine will be fully mapped to run correctly in the future, as it does not really matter what hardware you throw at it, it will still blow up every time with lambda=1 at that boost level.

[Rocco]

and who mapped it if is it possible to know?

it means near to 14.7AFR with 2bar of boost?

[andy10v]

I thought somebody on here had the 034 rs2 chipset at one point and it was rather low powered compared to what was on offer over here.

Anyway bad luck, hope you get her up and running again soon. Is it just going to be a stock engine with rods or any other plans.

Just curious, what kind of boost profile were you using, ie peak at what rpm and what at redline?

[prj]

it means near to 14.7AFR with 2bar of boost?

If what Billman is said is correct, then yes.

Have got also one bad experience with 034 lately. A guy bought a heavy duty check valve for the breather, that got stuck on first use and the turbo boosted the crank case.
Result... messed up crank and brand new bearings are garbage now...

So technically the part that was bad from the get go caused engine failure :/

[Billman]

In vems you adjust the main fuelling table through "VE". This comes in a calculation with the "req fuel" value and the ECU translates that in InjDC.

He requests 104 VE (fuel) and this amount gives at 1.1 bar a lambda value of 0.94. At 2 bars of boost the value is set at 108.
This is a very small VE value change and that why I say that most probably the lambda during 2 bar would be close to 1.

Idle lambda value was set at 80. So you can see that from idle to 1.1bar he has almost 20 value difference and from 1.1 to 2 bar only 4. And this is the point where it must become even richer.

As this goes way off topic I would suggest going further with it at the aftermarket topics where one can see other "vems maps".