Calibrating my Stg1 tune after 4-1 EL header install

[freerunner]

I justed wanted to share my experiences with the header install on my car (remember to think twice about safety if you think about modifying your rom):

Decided to keep my current tune (Stg. 1 with altered maf scaling etc.) and to update the missing bits. Went with the Stg. 2 EL cam maps and their corresponding ignition tables. I'm running 102 octane fuel, so there's an extra safety net.

The lower half of the rpm range felt great right from the start. I couldn't feel the torque dip any more. The engine pulled just linear from down low to top. Sound became great as well.

There are a couple of things I noticed:

• I don't know if the Stg2EL maps were developed for a 4-2-1 or 4-1 header but they work well enough as a baseline for mine.

• MAF scaling in the upper range was way off on the lean side (that's a good sign for a well working header). For safety purpose I enriched the table from 3.20V upwards by 2% before even firing the engine up. After warm up and some cautious logging it still ended up about 4% too lean! The irritations around the 60g/sec MAF range are gone. For the first time I had no issues re-scaling the MAF without excessive bumps.

• The clean maf scale exposed an imbalance of the OEM DI/PI calibration on my car. The port injectors seemed to inject about 2.7% less fuel than necessary. This was obvious looking at the log data. I just picked some random AFR value out of said area and divided them through its AFR_CMD like this: 12.5/12.16=1.02796

In the next step I used this result as a multiplier on the Injector Flow Scaling table. The outcome is a mostly perfect-flat AFR curve.

Before:
After:



Now from this point onwards, I could go two routes:
A) adjust timing for my fuel and call it a day
or
B) get the necessary tools up and try to tweak the cam timing.

[freerunner]

[post reserved]

[silvarbullet]

Very interesting, forgive the ignorance but Stg1/Stg2 EL sounds like OFT tunes correct?

I'll be getting my OFT soon and later on a 4-1 EL header as well (been drooling over the ptuning one). I'll be watching this thread to see how you go about adjust the cam timing.

sub'd

[steve99]

Originally Posted by silvarbullet

Very interesting, forgive the ignorance but Stg1/Stg2 EL sounds like OFT tunes correct?

I'll be getting my OFT soon and later on a 4-1 EL header as well (been drooling over the ptuning one). I'll be watching this thread to see how you go about adjust the cam timing.

sub'd

If you buy P-tuning header new, ask the-tuning guys for the cam tables

[silvarbullet]

Originally Posted by steve99

If you buy P-tuning header new, ask the-tuning guys for the cam tables

Awesome, thanks for the info.

[freerunner]

It's been a while since the OP. Unfortunately, I had to wait until the winter was over to get stable ambient temps.
Base maps were OFT v4, so the values in the 'cruise area' are original.
All the data in the tables about load 1.1+ have been determined with the help of vgi's mafscaling tool.
All values between cruise and wot have been smoothed manually.

I'm still concerned about the 4200 row in the exhaust table. It just looks wrong, but that's what the mafscaling tool came up with even after multiple tries to de-verify the results.
I've tried to use the highest gear possible, but most of the pulls were done in 3rd gear due to traffic and in particular because I don't want to hand out my driver's license.

I would not promise that I leave them in the current state, but here's a snapshot, nevertheless.
If anyone dares to test, please leave a comment here.

Exhaust retard:
,,0.15,0.20,0.30,0.40,0.50,0.60,0.70,0.80,0.85,0.90,0.95,1.00,1.10,1.20,1.30,1.40
800,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0
1000,0.0,0.0,0.0,10.0,10.0,10.0,5.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0
1200,0.0,0.0,10.0,20.0,20.0,20.0,10.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0
1600,10.0,20.0,20.0,30.0,30.0,30.0,15.0,5.0,5.0,5.0,5.0,10.0,10.0,10.0,10.0,10.0
2000,10.0,20.0,30.0,30.0,30.0,30.0,30.0,25.0,20.0,20.0,20.0,20.0,20.0,20.0,20.0,20.0
2200,10.0,20.0,30.0,30.0,30.0,30.0,30.0,28.0,27.0,26.0,25.0,24.0,22.0,22.0,22.0,22.0
2400,10.0,20.0,30.0,30.0,30.0,30.0,30.0,28.5,27.8,27.0,26.3,25.5,24.0,24.0,24.0,24.0
2800,20.0,30.0,30.0,30.0,30.0,30.0,30.0,29.0,28.5,28.0,27.5,27.0,26.0,26.0,26.0,26.0
3000,20.0,30.0,30.0,30.0,30.0,30.0,30.0,30.3,30.4,30.5,30.6,30.7,28.0,28.0,28.0,28.0
3600,20.0,30.0,35.0,35.0,35.0,30.0,30.0,31.3,31.9,32.5,33.1,33.8,34.0,34.0,34.0,34.0
3700,20.0,30.0,35.0,40.0,40.0,30.0,30.0,31.3,31.9,32.5,33.1,33.8,35.0,35.0,35.0,35.0
4000,20.0,30.0,35.0,40.0,40.0,30.0,30.0,31.0,31.5,32.0,32.5,33.0,34.0,34.0,34.0,34.0
4200,20.0,30.0,35.0,40.0,40.0,30.0,30.0,30.0,30.0,30.0,30.0,30.0,30.0,30.0,30.0,30.0
4400,20.0,30.0,35.0,40.0,40.0,30.0,30.0,32.0,33.0,34.0,35.0,36.0,38.0,38.0,38.0,38.0
4600,20.0,30.0,35.0,40.0,40.0,30.0,30.0,31.5,32.2,33.0,33.8,34.5,36.0,36.0,36.0,36.0
4800,20.0,30.0,35.0,40.0,40.0,30.0,30.0,31.3,31.9,32.5,33.1,33.7,35.0,35.0,35.0,35.0
5200,20.0,30.0,35.0,40.0,40.0,30.0,30.0,30.0,30.0,30.0,30.0,30.0,30.0,30.0,30.0,30.0
5600,20.0,30.0,35.0,40.0,40.0,30.0,30.0,28.8,28.1,27.5,26.9,26.2,25.0,25.0,25.0,25.0
6000,20.0,30.0,35.0,40.0,40.0,30.0,30.0,28.6,27.9,27.2,26.6,25.9,24.5,24.5,24.5,24.5
6400,20.0,30.0,35.0,40.0,40.0,30.0,30.0,28.5,27.8,27.0,26.3,25.5,24.0,24.0,24.0,24.0
6800,20.0,30.0,35.0,40.0,40.0,30.0,30.0,29.6,29.4,29.2,29.1,28.9,28.5,28.5,28.5,28.5
7000,20.0,30.0,35.0,40.0,40.0,30.0,30.0,29.5,29.2,29.0,28.8,28.5,28.0,28.0,28.0,28.0
7200,20.0,30.0,35.0,40.0,40.0,30.0,30.0,29.3,28.9,28.5,28.1,27.8,27.0,27.0,27.0,27.0
7400,20.0,30.0,35.0,40.0,40.0,30.0,30.0,28.9,28.3,27.8,27.2,26.6,25.5,25.5,25.5,25.5

Intake advance:
,,0.15,0.20,0.30,0.40,0.50,0.60,0.70,0.80,0.85,0.90,0.95,1.00,1.10,1.20,1.30,1.40
800,0.0,0.0,0.0,0.0,0.0,0.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0
1000,0.0,-5.0,-5.0,-5.0,-5.0,0.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0
1200,0.0,-10.0,-10.0,-10.0,-10.0,-10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0
1600,0.0,-10.0,0.0,0.0,0.0,0.0,10.0,10.0,10.0,15.0,15.0,10.0,10.0,10.0,10.0,10.0
2000,0.0,0.0,0.0,0.0,0.0,0.0,10.0,15.0,17.0,20.0,20.0,20.0,20.0,20.0,20.0,20.0
2200,5.0,5.0,5.0,5.0,5.0,5.0,10.0,17.0,20.0,20.0,20.0,25.0,30.0,30.0,30.0,30.0
2400,10.0,10.0,10.0,10.0,10.0,10.0,15.0,22.0,26.0,29.0,32.0,36.0,36.0,36.0,36.0,36.0
2800,10.0,10.0,10.0,10.0,10.0,10.0,15.0,23.0,26.0,30.0,34.0,38.0,38.0,38.0,38.0,38.0
3000,10.0,10.0,10.0,10.0,10.0,10.0,16.0,24.0,28.0,31.0,35.0,37.0,37.0,37.0,37.0,37.0
3600,10.0,10.0,10.0,20.0,20.0,20.0,20.0,25.0,28.0,30.0,32.0,35.0,37.0,37.0,37.0,37.0
3700,10.0,10.0,10.0,20.0,20.0,20.0,20.0,25.0,28.0,30.0,32.0,35.0,40.0,40.0,40.0,40.0
4000,10.0,10.0,10.0,20.0,20.0,20.0,20.0,25.0,28.0,30.0,32.0,35.0,40.0,40.0,40.0,40.0
4200,10.0,10.0,10.0,20.0,20.0,20.0,20.0,24.0,27.0,29.0,31.0,34.0,38.0,38.0,38.0,38.0
4400,10.0,10.0,10.0,20.0,20.0,20.0,20.0,24.0,26.0,28.0,31.0,33.0,37.0,37.0,37.0,37.0
4600,10.0,10.0,10.0,15.0,15.0,20.0,20.0,24.0,26.0,28.0,31.0,33.0,37.0,37.0,37.0,37.0
4800,10.0,10.0,10.0,10.0,10.0,20.0,20.0,24.0,26.0,28.0,31.0,33.0,37.0,37.0,37.0,37.0
5200,10.0,10.0,10.0,10.0,10.0,20.0,20.0,24.0,26.0,28.0,30.0,32.0,36.0,36.0,36.0,36.0
5600,10.0,10.0,10.0,10.0,10.0,20.0,20.0,23.0,25.0,26.0,28.0,30.0,33.0,33.0,33.0,33.0
6000,10.0,10.0,10.0,10.0,10.0,20.0,20.0,22.0,24.0,25.0,26.0,28.0,30.0,30.0,30.0,30.0
6400,10.0,10.0,10.0,10.0,10.0,20.0,20.0,22.0,23.0,24.0,24.0,25.0,27.0,27.0,27.0,27.0
6800,10.0,10.0,10.0,10.0,10.0,10.0,10.0,12.0,13.0,14.0,16.0,17.0,19.0,19.0,19.0,19.0
7000,10.0,10.0,10.0,10.0,10.0,10.0,10.0,12.0,12.0,13.0,14.0,14.0,16.0,16.0,16.0,16.0
7200,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,11.0,11.0,11.0,11.0,11.0,11.0
7400,10.0,10.0,10.0,10.0,10.0,10.0,10.0,10.0,9.0,9.0,9.0,8.0,8.0,8.0,8.0,8.0

PS: don't look at the numbers

[freerunner]

Cam maps updated. Power is much better in the lower rpms and the transition from cruise to WOT.
I actually had to pull some percent out of the first third of the DBW torque request maps to not run into drivability issues.
There are some improvements in the last thousand revs as well!

PS: The latter vdyno pic is from an old run with the stock header. Found it somewhere on my hard drive. Felt like posting it for a good laugh.

[Spec C Wannabe]

What software do you use for tuning/editing the rom file?


The interface looks very much like Ecuedit that I used to.

[freerunner]

Originally Posted by Spec C Wannabe

What software do you use for tuning/editing the rom file?


The interface looks very much like Ecuedit that I used to.

Brzedit. It's a spin-off of Ecuedit with some extra quirks for the platform, IIRC.

[tomm.brz]

A friend of mine has a skunk2 EL 4-1 catless header
so do you think these cam settings are better than the normally used taken from OTS v2 stage2 EL?

[freerunner]

I don't know if a Skunk header will benefit from my tables, since the calibration was done with a JDL. It could run better or worse compared to the OTS tables. But never perfect.
Closest relative imho is the P&L header. Runner layout looks nearly identical, although that doesn't mean anything. If runner diameter, length and stepping are different, the tables won't fit.
PS: I always thought the OTS EL tables have been developed on a gutted stock/HKS header type of thing.

[vtekdis]

Originally Posted by freerunner

Decided to keep my current tune (Stg. 1 with altered maf scaling etc.) and to update the missing bits. Went with the Stg. 2 EL cam maps and their corresponding ignition tables. I'm running 102 octane fuel, so there's an extra safety net.

I'm about to install a JDL EL catless header on my BRZ leaving the rest of the exhaust and intake stock. I was going to start with the latest v4 Stage 2+ release but my guess it's based on the UEL. What tune would you recommend to start with. I'm not sure if your's is catless or not so that's why I'm asking.

[freerunner]

Originally Posted by vtekdis

I'm about to install a JDL EL catless header on my BRZ leaving the rest of the exhaust and intake stock. I was going to start with the latest v4 Stage 2+ release but my guess it's based on the UEL. What tune would you recommend to start with. I'm not sure if your's is catless or not so that's why I'm asking.

I recommend going with the V4 or V2EL as base (whatever feels 'better' on your car) and throwing my VVT tables in. But don't use the old ones here or your car is going to be a drinker Can post the latest revision I'm running tomorrow. Going to bed right now.

[freerunner]

Have fun!