Turbo 5 Speed Data

[TGP37]

TABLES-CHARTS-3100TGP.zip

Thought I share the results from compilling all my logs into 1 excel doc and run calcs to make some interesting tables. Over 250k rows, 12 hours driving total.

Colored and in excel format for later use.

Not too many turbo 5 speed files out there, hope this helps someone some day.

I can post a unique table if requested. I am still working on the spark map, which isn't complete but is the best spark for highest torque while in trim 3 WOT.

EDIT: Attaching Spark and Open Loop Fuel Maps for turbo3100

TURBO3100_SPARK_OLFUEL.zip

[TGP37]

More data. In the AFR vs Torque chart, we can see the reduction of torque as the AFR gets richer on the top end. Spanning from 10.5 to 12.1.


Also noting 37% throttle appears to be the threshold for spool up/boost.

[TGP37]

Here is a large image with all the scatter charts, a lot of data.

trims are 0-idle, 1-decel, 2-normal/cruise, 3-wot, 4-high rpm

[TGP37]

Data analysis of Idle conditions and fuel consumption. Used injector data with IPW against RPM's to determine the precise amount of fuel delivered over a fixed amount of time. The time frame is 1/5th of a second which is the length of 1 data cell. HPT logged 5 frames per second.

Fuel injector per cylinder fires once per every 2 RPM's. At 700 RPM the injectors fire 350 times (per cylinder). If the IPW is 2.1 msecs, then a 36 lb/hr injector will deliver 0.00454 grams of fuel per 1 millisecond opened.

((IPW * 0.00454) * (RPM / 2)) / 300 = FXgs

FXgs = Fuel amount in grams per 0.2 seconds

((2.1 * 0.00454) * (700 / 2)) /300 =

FXgs = 0.011123 grams per 0.2 sec
FXgm =


Since we are dealing with idle conditions, a static average is effective. Noting the actual fuel delivery can be off a little as long as the same formula is used across the board.

Here is the table that I came up with using the massive data file from my 3100v6 turbo. Referrenced against AFR as well.

Best fuel saving idle is at 14.35:1 AFR at 670 RPM

[Z26-T]

How does this look?

[TGP37]

WOT spark region dropped for boost
WOT AFR dropped for boost (was 13.2-12.4 range, now in the low-mid 11's) will make more power, safer.

Bumped fuel cutoff limits to 7000 RPM to prevent nipping them in boost. Could cause lean condition and blow a piston.

Modified MAF Table slightly in referrence to the log file. This will balance fuel trims and keep from running lean in boost (pe mode)

Disabled torque limiters

Set MAP to default always. Prevents Barometric relearn function from screwing with fueling due to turbo.

I think that is it..........as always, be careful with new files.

EDIT: btw, it seems as if the accel enrichment is too weak. If your tip in response is slow or hesitates, try bumping up the AE Enrichment table. The current values are much lower then stock.

[robertisaar]

Bumped fuel cutoff limits to 7000 RPM to prevent nipping them in boost. Could cause lean condition and blow a piston.

care to explain this? why would a lean condition be present when hitting the rev limiter? when you exceed the rev limit, when it comes time to trigger the next injector's driver, instead of giving it the calculated BPW, it just doesn't drive it (0 BPW), it's essentially like DFCO since the engine is spinning but consuming no fuel.

[TGP37]

care to explain this? why would a lean condition be present when hitting the rev limiter? when you exceed the rev limit, when it comes time to trigger the next injector's driver, instead of giving it the calculated BPW, it just doesn't drive it (0 BPW), it's essentially like DFCO since the engine is spinning but consuming no fuel.

While in boost I would not want my injectors cut, especially at 6000 rpm. For a n/a it isn't such a big concern, as I've been told. Someone here said they blew a piston that way, hitting rev limit in boost, wish I remember who.

[robertisaar]

if you were spraying nitrous, i could see it being an issue, but with a turbo/supercharger.... i don't see it. if that's the way it happened, L67s would explode left and right from people bouncing them off of the limiter...

[TGP37]

I agree it's not common, yet still 6000 is kinda low for a fuel cutoff limit. IIRC the guy has a 5-speed and he may be driving with the pcm thinking he is in park/neutral. This is obd2 on a 95. I haven't a clue for details of the rig except it's a 3400v6 95 Beretta.

I suppose a leaky injector could foster a lean detonation if fuel cut is hit in boost. Just speculation on my part there.

[Z26-T]

The car believes that it's always in drive. I agree with raising the fuel cutoff to 7000. The original tune had it there, but I dropped it to 6000 without thinking much about it. If the injector leaks a bit, if there is any fuel condensation in the LIM, if my turbo is leaking oil in the intake side... etc. None of those are super likely, but still possible.

[Z26-T]

EDIT: btw, it seems as if the accel enrichment is too weak. If your tip in response is slow or hesitates, try bumping up the AE Enrichment table. The current values are much lower then stock.

Would you keep stock values or what does your AE look like? I was a bit confused to why they're so much lower than stock. Maybe the tuner was attempting to protect his auto trans?

Just changed all my spark tables to what yours are, also changed the Open Loop AF by RPM vs Air Mass to one of your tables. Changed to open loop only operation, raised fuel shut off, and set map to default always. Not sure exactly what to change with the WOT stuff and what torque limiters you disabled.. but making some progress

Still have a fair share of KR..

[TGP37]

Would you keep stock values or what does your AE look like? I was a bit confused to why they're so much lower than stock. Maybe the tuner was attempting to protect his auto trans?

Just changed all my spark tables to what yours are, also changed the Open Loop AF by RPM vs Air Mass to one of your tables. Changed to open loop only operation, raised fuel shut off, and set map to default always. Not sure exactly what to change with the WOT stuff and what torque limiters you disabled.. but making some progress

Still have a fair share of KR..

Spark tables, that table is not aggressive...safer and helps spool up faster. Then once you get used to the software and how she drives you can bump up the spark 1 degree at a time. Stop and back off 1 degree when you hit KR in a cell. Can't do that too well with false knock though.....

WOT is almost like open loop tables. There is a base AFR table then a modifier table versus time/RPM. ie- Base afr of 11.8, 3200 rpm -0.4 = 11.4. You then have TPS% trigger table and a time delay table for TPS% reached when PE enabled. I set my PE delay to zero across the board (maybe keep 0.5 secs at low RPM for not triggering PE in shifts). My TPS % is roughly 35% at 2800 RPM+. Slides to 60% at 1200 and lower.

AE, I would keep that stock until your done tuning the spark/afr, etc. It should be one of the last things to tune.


I also feel I need to put this out there: Open Loop is fun and gives more fueling control imho, just be aware you don't have auto correction to stoich. It would be wise to have a wideband if running open loop exclusively. But, I spent a long time refining that open loop table.....it won't cause any problems as long as other aspects of the tune are correct, like MAF table or injector flow rates.



EDIT: It just dawned on me your KR at low rpms (1800-2500) could be burst knock from having such a low AE. Set back to stock and see if your KR goes down.