Couple more datalogs... trying new things - SRT Forums

SRTrent · 11-07-2009, 01:19 AM

this one is in 3rd gear at like 16-17ish psi
Deposit Files

this one is in 3rd gear at like 19ish psi

Deposit Files

Let me know what you think

lyncoo · 11-07-2009, 01:24 AM

i tried to look at it it said no serial port available. im trying to figure this stuff out lol

SRTrent · 11-07-2009, 01:31 AM

Yeah dude this shit is confusing

And they get mad at me... You gotta open up DS Dataviewer to view it I believe.

Louisvilleguy · 11-07-2009, 12:12 PM

The first run looks good knock wise. Only one degree at around the magical 5400 rpm point but it drops off quickly. One thing that looks odd to me is the commanded a/f. What does your wideband read? Do you have a scangauge? It would be helpful to record A/F and RPM on your scangauge during the pull so you have a log of the actual A/F that you could compare and tune the car with. Also depending on your A/F, you could possibly try adding more timing in.

Duster: In regards to the first log he posted, the PCM is really trying to command an A/F that rich? I know there is probably more to it than that, but I am new to looking at these types of logs. I just picked up my DSP yesterday.

On the second log it seems to want to knock in the higher RPM range. Again what are your A/F's getting up to at the higher boost?

Lastly, I think you should log BARO as well. This way you can tell how much boost the PCM is really seeing (Avg Map to Use - BARO = psi). I would trust that more than a gauge.

SRTrent · 11-07-2009, 12:22 PM

hmm I think I'll do that later then it would be good to show boost on a datalog. My AFR's get up to 12.5ish around redline on the wideband. It's confusing to me too.

**gump1114** · 11-07-2009, 06:10 PM

Quote: Originally Posted by Louisvilleguy

Lastly, I think you should log BARO as well. This way you can tell how much boost the PCM is really seeing (Avg Map to Use - BARO = psi). I would trust that more than a gauge.

very very usefull info!

SRTrent · 11-08-2009, 05:51 PM

What injectors should I get to max out the stock turbo? I can't even boost 17psi without even being too lean no matter how much fuel I give it so I don't know if anything is wrong or not.. they say you can boost 18psi on the stock fuel system well I can't...

**gump1114** · 11-08-2009, 06:44 PM

get a fuel return line and raise the fuel pressure and you can boost much more on the stockers.

SRTrent · 11-08-2009, 07:00 PM

Also with the way the weather is changing from hot during the day to cold at night really is fucking with the tune... so gay. Actually it's hot tonight too.

SRTrent · 11-08-2009, 11:52 PM

I just click on AVG MAP TO USE but it doesn't say anything about BARO and it just read as high as 29psi on AVG MAP TO USE

ptperformance · 11-09-2009, 07:52 AM

Quote: Originally Posted by SRTrent

What injectors should I get to max out the stock turbo? I can't even boost 17psi without even being too lean no matter how much fuel I give it so I don't know if anything is wrong or not.. they say you can boost 18psi on the stock fuel system well I can't...

Get a set of 750 injectors so you don't have to screw around with buying another set later on. Just get a rescale for them and you should be good to go.

Quote: Originally Posted by SRTrent

I just click on AVG MAP TO USE but it doesn't say anything about BARO and it just read as high as 29psi on AVG MAP TO USE

What CROM file are you on? You can read the BARO you just have to know where to find it. Look around some and I am sure you can find that PID.

The reaon you see 29 psi is because you have to take the normally pressure (1 bar) into the equation. So 14 ish psi - boost pressure (AVE MAP TO USE) = acutal pressure. Also remember that you're only going to be able to see what the sensor can read out to. So, we have a 2.25 bar sensor, the most it can calculate is 18.8 psi or 29.2 ish in your AVE MAP TO USE pid. Hope that makes sense.

SRTrent · 11-09-2009, 08:42 AM

What about Stg 2 injectors? Would that be plenty of fuel to max out the stocker? I'm not gonna go big turbo for maybe another couple years...

Gizmodo · 11-09-2009, 08:54 AM

Quote: Originally Posted by SRTrent

I just click on AVG MAP TO USE but it doesn't say anything about BARO and it just read as high as 29psi on AVG MAP TO USE

Look under fuel flows.

ptperformance · 11-09-2009, 11:46 AM

Quote: Originally Posted by SRTrent

What about Stg 2 injectors? Would that be plenty of fuel to max out the stocker? I'm not gonna go big turbo for maybe another couple years...

It is but remember that they run close to max duty cycle when you start getting close to 380 ft lbs of tq. I still say get 750's so you have the bigger injectors when you get a bigger turbo.

SRTrent · 11-09-2009, 04:24 PM

Oh yeah and I'm on the newest CROM version 9v18 I think it is... It costs to get injectors rescaled? When I do get the injectors rescaled should I just put in the 3 bar MAP and TIP sensors too so I don't have to worry about them later?