He also has some tuning habits that most of us dont agree with. I believe you are correct though.

 

Scot Grey is running 87 on his EVO as well. I don't get the point though.
He also dosen't tune with a WB as well, so.....

 

I don't really understand why you would want to tune for 87 octane, but to each their own..

 

Went out and did some more tweaking and logging today.

27 psi on 91 oct.



27psi peak, 23psi at 7000 rpm

This chart now has turbo lbs/min logged as well. 41.5 lbs/min max

Little bit of knock noise at spool up, but other than that, no knock.

Wideband AFR at 11.3-10.9

 

Bryan,

Do you know what I would love to see from your setup? Logged AITs from a GM AIT sensor. I want to know how good of a job the ETS 3.5" is doing on cooling the charge. That is the IC I am contemplating on getting and would like to see some solid data on it first.

Have you ever thought about buying an AIT sensor and logging intake temps from the upper IC pipe or IM?

BTW, great results!


Eric

 

Actually I have thought alot about getting a AIT sensor. It would help a ton in tuning for the track.

I wish there was a way to log it via EvoScan.

btw, does the lbs/min seem right?

On another note, I hit 300 load on a couple pulls. It feels very weird seeing 300 load on 91 octane. haha

 

I am going to get the GM AIT and start logging it. I have the Innovate SSi4, so I can log 4 additional sensors. I already have my GM 3.3 bar hooked up to it, so adding in a GM AIT would help. I was just wondering if you had one or were going to get one because you have the IC that I want to get.

Your lb/min looks about right to me. I'll run it through a few quick calcs to see.


Eric

 

I'm pretty sure that there is a way to log manifold air temp via EvoScan. In concept, the manifold air temp signal gets wired into the fuel temperature ADC on the ECU, and then to keep the ECU happy, the fuel temperature is simulated, probably with just a simple constant.

If you are willing to risk a few bucks buying the GM temp sensor, I could help you get it working.

 

btw, since we are on the AIT tip..

The Evo X has a AIT sensor on the MAF and the intake manifold.

 

I hate the DataLogLab dyno but at least for the before/after I'll post it:



Same stretch of road for both. 25.5psi vs 27psi. The 27psi also has a open filter while the 25.5psi had a drop-in filter. So not a direct comparison peak hp wise, but the torque sure improved.

 

I think it's time for me to upgrade my injectors for some added headroom.

Hitting 95% IDC at 7500 rpm with Denso 720cc injectors.

 

OK, a bit of boring math again, but your lb/min seem to agree pretty well with some calculations.

First I used an equation that I made for boost estimate to find what your AIT truly is at the IM:

BoostEst=[(load*T)/(P*VE*280)]-14.7
T = actual intake air temp (not MAF temp) in degrees Rankin (degrees F +460)
P = atmospheric pressure in psi at the MAF(baro)
VE = VE of engine at the RPM being measured

26.8=[(290*T)/(14.5*1*280)]-14.7
T= 121 F


Then, I used your data above for the 5500RPM point:

Using your 5500 RPM point (where VE should be about 1)
26.8 psi = (26.8+14.7)/14.7 = 2.82

2.82[122*5500*1/(1728*2)]=547.5 CFM

547.5 * .069 (this is roughly the conversion for your 121 intake temps) = 37.78 lb/min


Your graph shows about 37 lb/min at 5500 RPM, so everything seems to be checking out well.


Note: There are a lot of assumptions taken, like the 1 VE at 5500 RPM, baro of 14.5, etc (For example, chaning baro to 14.3, changes intake temps to 112 and changes the lb/min slightly higher), but this is just a calculation to see if we are in the ballpark and it appears that way.

Eric

 

Cool thanks Eric.

I wonder what the most lbs/min out of a Green is so far. I know i'm not close to it on 91, even with the higher boost but it would be interesting to see.

 

A user on this board that I knew of from the DSMLink boards tested the green when it first came out. He had C-16 and ran the green without the line to the wastegate, so basically maxing the turbo out for all it's worth. DSMLink recorded 48.7 lbs/min.

I know I have made reference to that screenshot before in a post for something, but if you want to search for it, his screenname is kjewer or kjewer1.

Edit: Here ya go...I found a post where I reference it. It is in the thread where I was looking for logs to correlate load with mass airflow: https://www.evolutionm.net/forums/sh...=297809&page=2 Look at post #29.


Eric

 

So, it would seem you are saving the 27psi peak for around 5250RPM, and limiting the initial spike to around 23-24psi.

No way of knowing what your timing map looks like, but I would guess is doesn't ramp up too quickly until the boost tapers around 6000