mrfred

iTrader: (50)

My calculation is not an estimation. Its the real deal. Its like the difference between calculated load and 2-byte load.

evo828

thanks.

l2r99gst

iTrader: (2)

OK, I have edited and updated post #27 on the previous page after getting a few corrections from mrfred. So, those should be the good instructions for ROM 96940011. Hopefully, I will get to test this weekend or coming week to give the final OK.

Thanks goes to mrfred.


Eric

cpoku

iTrader: (2)

I applaud your genius, so you will make the stock ecu perform better stand-alones

l2r99gst

iTrader: (2)

mrfred, did you log IATs in this data, also? I want to build a VE curve based off of your data for your car.

When I get a chance to log mine, I want to compare the VE curve from my VIII to your IX and see how much Mivec is affecting the curve.

Just eyeballing your data, I assumed an intake temp of 70*F and got about 95% VE at 5000 RPM and 89% VE at 7000 RPM, but I would need exact IATs to calculate better. If I remember correctly, you are still on the stock airbox, so your car would be a good candidate to build a VE table for the IX.


Thanks,
Eric

joedr

iTrader: (27)

Hi mrfred!

Can I port this change on a tephra bin? I can not tell if this patch will have any interference with his modded bin.

Seems pretty cool to have this and the IAT patch together with the tephra mods.

Congrats on this findings!

mrfred

iTrader: (50)

Yep, its compatible with a tephra ROM. Follow the instructions, and you'll be good to go.

joedr

iTrader: (27)

Thanks mrfred!

A lot of good mods have become available to the IX!

mrfred

iTrader: (50)

Eric,

I try to get together a new plot with temp at the MAF and in the UICP.

l2r99gst

iTrader: (2)

OK, I verified this today on my 96940011 ROM. It works as expected. I'm using LogWorks instead of EvoScan, and I need to nail down a few issues with that, but it seems to have worked fine.

I did three pulls in third gear. Two with my cutout closed and one open, to see the difference. I'm running moderate boost, only about 22 psi peak, tapering to about 20. Also, minimal mods (272/264 gsc and ebay cone filter). With my cutout closed I peaked at about 36 lb/min and with the cut-out open I peaked at about 39 lbs/min. Shows how restrictive the stock cat and cat-back are. That's roughly a 30 HP gain from bypassing the stock cat/cat-back.

Also, the 4000-7000 RPM times when from about 4.2s to about 3.4s closed/open. I know my car is pretty slow to begin with, since I haven't even had any time to really tune it yet and I have to fix a couple knock issues from various sources, but I just thought I would give some numbers to show the gains of an exhaust compared to stock.

I'll post up some LogWorks graphs later to show what I am referring to. Also, I will include maf intake temp and upper IC intake temp to show how the stock IC performs (or lock of performance).


Eric

l2r99gst

iTrader: (2)

OK, here are the screenshots of the logs.

Cut-out open:


Comparison of cut-out open (solid lines) to cut-out closed (dotted lines):


With the cut-out open:
-spoolup is about 250-300 RPM quicker
-boost roughly averages about 0.4 psi greater
-AFR is about 0.5 points leaner in a few spots, most likely due to the fact that I am hitting cells that I haven't had a chance to tune yet
-mass airflow is about 3lbs/min greater (38.7 vs 36.0) at peak airflow
- 3900-6900 RPM is 3.44s vs 4.26s with cut-out closed (I know my car is slow...still need to tune it properly)

Other interesting facts for stock intercooler:
Ambient temps (around 50*F - forgot to look it up)
MAF temp beginning of pull to end - 58*F - 48*F (10*F drop)
Upper IC intake temp, beginning of pull to end - 65*F - 79*F (14*F rise, roughly 30*F above ambient)

Edit: Updated graphs. The original graphs had only the MSB of the 2-byte mass airflow graphed. I fixed that and reattached the new graphs.


Eric

joedr

iTrader: (27)

Is the formula for MPG correct?

I am getting the following calculations and all are in the thousand area. I was expecting something between 5-40 range.

Any insight?

Data:

mrfred

iTrader: (50)

The mpg values should definitely be what you said. Mileage I record from the patch matches almost perfectly with what I see when I fill up. Sounds like something is wrong somewhere with the setup.

joedr

iTrader: (27)

mrfred,

Can you check my configuration?

Here is what it is on my rom:



Here are my data settings in Evoscan (BTW... AFRMAP stays at 128 always):



Is this correct?

Thanks in advanced!

mrfred

iTrader: (50)

I see two problems in your EvoScan setup:

1) Wrong units for AFRMAP. Should be 128/x*14.7

2) Speed needs to be enabled and placed before the mileage calculation.

Makes those changes and let me know what happens with the mileage numbers.