WOT Shift RPM's for drag racing?

[StealBlueSho]

LMS 4+x tunes don't shift until close to 7K rpms... The boost starts to dive after 6500 rpms.. and the tune runs really rich in the higher RPMs... They advance the timing pretty good through the whole rpm range...

The LMS tunes keep the IAT down significantly though... They are not pushing the turbos outside of their effeciency to start pushing hot air...

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[StealBlueSho]

I stand corrected (Maybe).... I datalogged all my LMS tunes... which shows that the shift is happening around 6350 RPMS.. HOWEVER.. I know the tach swings very close to 7K... and the resolution of the SCTx4 does not capture the RPMS very well at the high end...  so... I suspect that the shift happens between 6400 - 6600 maybe? I highly doubt LMS will chime in.... would be nice!

[BOT_ROCKET]

I stand corrected (Maybe).... I datalogged all my LMS tunes... which shows that the shift is happening around 6350 RPMS.. HOWEVER.. I know the tach swings very close to 7K... and the resolution of the SCTx4 does not capture the RPMS very well at the high end...  so... I suspect that the shift happens between 6400 - 6600 maybe? I highly doubt LMS will chime in.... would be nice!

is there a minimum number of things you can configure to log? maybe build a config that only logs rpm so you get the best resolution possible.

[16MagSport]

The 2.7 Eco F150 I drove pulled a lot harder at high rpm vs the Explorer.


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[StealBlueSho]

I stand corrected (Maybe).... I datalogged all my LMS tunes... which shows that the shift is happening around 6350 RPMS.. HOWEVER.. I know the tach swings very close to 7K... and the resolution of the SCTx4 does not capture the RPMS very well at the high end...  so... I suspect that the shift happens between 6400 - 6600 maybe? I highly doubt LMS will chime in.... would be nice!

is there a minimum number of things you can configure to log? maybe build a config that only logs rpm so you get the best resolution possible.

Yup, you could log one thing at a time. I no longer have my SCTx4 so I can't log anything at the moment...

Would provide marginally better resolution...

It is funny though... at the higher RPMs the boost dips and the fuel mixture richens up quite a bit..They also don't drop the spark as much during the shift as other tuners.. but their overall approach is much different..

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[GT500R]

LMS 4+x tunes don't shift until close to 7K rpms... The boost starts to dive after 6500 rpms.. and the tune runs really rich in the higher RPMs... They advance the timing pretty good through the whole rpm range...

The LMS tunes keep the IAT down significantly though... They are not pushing the turbos outside of their effeciency to start pushing hot air...

Sent from my Nexus 6P using Tapatalk

Not sure what you are seeing but I see an average increase of around 40+*C in "charge air cooler temp" start of a run to 100 mph each time.

What do you consider IAT being down?

I am around 17 psi at 6200 rpm which I would consider right outside their efficiency based on the maps and calcs.

[GT500R]

Cool tests! Do you have any STFT data? The amount of boost you're running also has an impact because you can see it heat up the manifold charge temps (IAT2).

The transverse 3.5L EB doesn't seem to like it above 6k RPM very much. I guess the 2.7L EB reacts better at higher RPMs.

STFT data?

[StealBlueSho]

LMS 4+x tunes don't shift until close to 7K rpms... The boost starts to dive after 6500 rpms.. and the tune runs really rich in the higher RPMs... They advance the timing pretty good through the whole rpm range...

The LMS tunes keep the IAT down significantly though... They are not pushing the turbos outside of their effeciency to start pushing hot air...

Sent from my Nexus 6P using Tapatalk

Not sure what you are seeing but I see an average increase of around 40+*C in "charge air cooler temp" start of a run to 100 mph each time.

What do you consider IAT being down?

I am around 17 psi at 6200 rpm which I would consider right outside their efficiency based on the maps and calcs.

So I don't measure the CAC temp.. I believe that's part of the datapoints Torrie collects. I collect data off the intake manifold which is "IAT2"... I see an increase of 18 degrees F from 0 - 100 with ambient temps around 72..

40C incease would be over 100F increase... that's A LOT... but its a different sensor...

[GT500R]

LMS 4+x tunes don't shift until close to 7K rpms... The boost starts to dive after 6500 rpms.. and the tune runs really rich in the higher RPMs... They advance the timing pretty good through the whole rpm range...

The LMS tunes keep the IAT down significantly though... They are not pushing the turbos outside of their effeciency to start pushing hot air...

Sent from my Nexus 6P using Tapatalk

Not sure what you are seeing but I see an average increase of around 40+*C in "charge air cooler temp" start of a run to 100 mph each time.

What do you consider IAT being down?

I am around 17 psi at 6200 rpm which I would consider right outside their efficiency based on the maps and calcs.

So I don't measure the CAC temp.. I believe that's part of the datapoints Torrie collects. I collect data off the intake manifold which is "IAT2"... I see an increase of 18 degrees F from 0 - 100 with ambient temps around 72..

40C incease would be over 100F increase... that's A LOT... but its a different sensor...

Ah, gotcha.  Yes I don't have the IAT2 set up on my logs but will do so. 

Thanks.