So I had a bit of blowby...

[XfireZ51]

Originally Posted by Ccmano

Nice.. I'm jealous you have both Pete and Al so near by. It will have to be on the job training for me at some point.
H

Could be cheaper/faster shipping it back here. These guys along w Marc have forgotten more than I'll ever know. Which allows me to just turn the key and motor off.

[Ccmano]

Originally Posted by XfireZ51

Could be cheaper/faster shipping it back here. These guys along w Marc have forgotten more than I'll ever know. Which allows me to just turn the key and motor off.

... and open the check book.
H

[XfireZ51]

Originally Posted by Ccmano

... and open the check book.
H

Do it once and do it right.

[Blue Flame Restorations]

Car is in good hands. Glad to see you getting it rebuilt.

[XfireZ51]

Have gotten the keys back from Pete so now I get the chance to drive around a bit, and do some datalogging. Anytime I do any kind of modification to the motor or drivetrain, I check the fueling calibration to tune the operation for as optimum as I can. You would be surprised how mods like flywheels, rear axles, injector changes affect the tune. I'm not speaking of something that's "good enough", its about a tune that is specific to the motor and the modification state it is in at the moment.

As an illustration, I had modified the tune to the motor prior to heading to MR5.
I suspect the broken ring had already occurred although the motor gave no indication of a problem idling or cruising. Even MPG was good at 23-24. We drove over 2300miles in 10days, and aside from the oil consumption, the motor never hiccuped.
I have attached pics of the changes to the fueling tables made after my initial logging session yesterday. Its rich pretty much all over the operating range.
The tables are of the new calibration so the negative numbers are fuel being removed compared to the previous cal.
Its important to get this part of the fueling correct before ever taking it to the dyno for WOT tuning. One depends on the other. And part throttle really can't be done on a dyno. Maybe an engine dyno, but even the OEMs do their fine tuning after logging lots of miles over many different types of environments and roads. I'll take it out again today to confirm the changes and update. Its an iterative process. Rinse and repeat.

[Ccmano]

Are you using TunercatPro to datalog?
H

[XfireZ51]

Originally Posted by Ccmano

Are you using TunercatPro to datalog?
H

No. Not sure that Tcat even offers a datalogger. TunerPro does and there's also a version for use on an Android tablet which I also have connecting to ALDL via Bluetooth. But I have been using EASE(Personal) diagnostics for the last 15 years. I may switch over to TPRT logging because of the simplicity of the tablet logging.

[XfireZ51]

Did some more datalogging today w initial revision of calibration. Noticeably smoother. Acceleration responsive to the smallest change in throttle position.
To illustrate the difference between the initial tune and the new one I just created, attached are pics showing the changes to the same VE table and
how much change was needed for each revision. The 9.18 table is the most recent revision which I will datalog next. You can see how the table got "cleaned up" quite a bit with first revision. You will never get to all zeros, but the recommended delta to the VE will be insignificant. You'll see a seesawing of the VE% between one revision and the next. And that's how u know you are as close as you'll get on this aspect of the tune.

[XfireZ51]

Update: Recheck of Compression #s after rehab.

1 220#
3. 222
5. 221
7. 220

2. 232
4. 230
6. 234
8. 242

Thanks Pete.

[tpepmeie]

The bank-to-bank comparison is interesting. Cam timing?


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