[E90ice]

I remember a while ago, somebody posted a dyno sheet that showed an increase in hp after dropping some of the mid-range torque values by a bit.

Does anyone have any info about this?

Are you guys running straight values across the board or gradually increasing values?

What is our goal, regarding boost and dataloging? Is it to keep the boost as steady as possible throughout the rev band?

[Driver72]

Well as some of you know, i'm probably the first and may still be the only person to run gradual increasing values on the v2.
Been doing so a few days after I installed the v2 and speaking to Shiv in early December.

As for lowering values and getting more power?
I think those are anamolies in the tests. Or they've raised their values to a point they are getting too much boost and not enough air coming in and choking off the power, therefore showing higher numbers with less values but appropriate boost levels for the air they can get in.

[Mr. 5]

I don't know too much about the v2 because I haven't had the experience with it yet, but I remember reading that if you increase the hp then it looks like the torque will go down and vice versa.

I don't know about you guys, but I would rather increase hp than the torque right now to focus more on the higher end speed without loosing traction.
The more the torque the more wheel spin and wasted power.
That's my 2 cents.

[e90AW335i]

Originally Posted by Mr. 5

I don't know about you guys, but I would rather increase hp than the torque right now to focus more on the higher end speed without loosing traction.
The more the torque the more wheel spin and wasted power.
That's my 2 cents.

+1. An ideal situation would be to limit the torque in the very beginning of the RPM range and maximize the hp at the later RPMs....

[O-cha]

You guys are funny.

[e90AW335i]

Originally Posted by O-cha

You guys are funny.

Thanks....

[335iheLLraiseR]

the dyno in question was done by Shiv himself if I remember correctly. It was in a thread he started at the early stages of the the release of V2.

[stillclaimndp]

adjusting the tq values up on 2.02 raise both hp and tq~

[scalbert]

If you increase the values higher than the current octane will support, you will start inducing knock. When this occurs you will start loosing power as the DME pulls timing. By lowering the user values you will get out of the knock range make more power.

This is why there are limits as to how high you can put the values based on the octane you are running.

[E90ice]

Originally Posted by scalbert

If you increase the values higher than the current octane will support, you will start inducing knock. When this occurs you will start loosing power as the DME pulls timing. By lowering the user values you will get out of the knock range make more power.

This is why there are limits as to how high you can put the values based on the octane you are running.

So, if you don't hear knock, does that mean you are fine?...or you should still check boost and datalog?

[e90AW335i]

Originally Posted by E90ice

So, if you don't hear knock, does that mean you are fine?...or you should still check boost and datalog?

You should still check boost for sure....

[scalbert]

Originally Posted by E90ice

So, if you don't hear knock, does that mean you are fine?...or you should still check boost and datalog?

Not at all, the DME will hear it well before it is audible to you. You should go by the recomendation of Vishnu; max of 92% - 93% on 91 octane and 93% - 94% on 93 octane. The datalogs will not tell you if the DME is measuring knock activity. The datalogs are to confirm the boost being run.

[midlife]

Originally Posted by scalbert

Not at all, the DME will hear it well before it is audible to you. You should go by the recomendation of Vishnu; max of 92% - 93% on 91 octane and 93% - 94% on 93 octane. The datalogs will not tell you if the DME is measuring knock activity. The datalogs are to confirm the boost being run.

if one has an auto scanner that records timing advance,
couldn´t you basically start with vishnu torque/octane recommendations,
then slowly raise torque values until you see some ignition retard (due to anti knock)?

thanks

[Sniz]

Originally Posted by midlife

if one has an auto scanner that records timing advance,
couldn´t you basically start with vishnu torque/octane recommendations,
then slowly raise torque values until you see some ignition retard (due to anti knock)?

thanks

I suppose that could work. You could raise it up until you see the ignition timing change and then pull it back a bit.

That would be putting you on the ragged edge of safety though. Given the poor gasoline you are running i'm not sure I would push it that far though.

[leftcoastman]

Originally Posted by 335iheLLraiseR

the dyno in question was done by Shiv himself if I remember correctly. It was in a thread he started at the early stages of the the release of V2.

It was an observation that I noted. Search for my original V2 dyno and you'll see the graph. I lowered midrange and peak hp went up a bit.

Shiv's explanation is that the lower output at midrange resulted in less turbo heating, so when it got to the top end, it could squeeze out a bit more Hp.

[scalbert]

Originally Posted by midlife

if one has an auto scanner that records timing advance,
couldn´t you basically start with vishnu torque/octane recommendations,
then slowly raise torque values until you see some ignition retard (due to anti knock)?

Hypothetically yes, it should work. But it is not as good as seeing the actual ignition timing retard. Plus, I am not sure the the total advance returned with ODBII data includes any knock retard; it may be the base advance value prior to any offset. If so, it may still indicate what is occuring but would not be imediate. It may take a few pulls in one state to see the adaptation.

Again, until we get a real tool to measure advance AND retard, this is just guess work.