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 Matt's Tune Thread

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charlieRobinson
Abaddon
matt270avian
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matt270avian
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matt270avian


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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyTue Dec 02, 2014 2:02 pm

It's in and readable/writeable. Yaaaaaayyyy.
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turtleman
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyTue Dec 02, 2014 2:07 pm

Do not try to write your old OSID onto the replacement PCM. It will instabrick
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matt270avian
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyTue Dec 02, 2014 2:16 pm

turtleman wrote:
Do not try to write your old OSID onto the replacement PCM. It will instabrick


I didn't do anything more than write the my bin and update the VIN.

Abaddon - I didn't see the option to do a crank learn, so I haven't tried starting/cranking it yet. Can you guide me a little more to where it is?
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Abaddon
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyTue Dec 02, 2014 2:32 pm

The Crank Relearn should be under "Scan". Hook up to the PCM/DHP via "scanner"....the same place you go to start a Log. There should be an option for "Crankshaft Variation Relearn". At least I think I recall that's where it is. If you can't find it, post back (obviously) and I'll go hook up to my Riv and find it.
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matt270avian
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyTue Dec 02, 2014 3:05 pm

Yep that's it. It's under real time controls. Thanks everybody for helping me and not letting me freak out too much. Car started right up and is purring like usual.
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Abaddon
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyTue Dec 02, 2014 3:14 pm

thumbsup

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matt270avian
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyTue Dec 02, 2014 3:28 pm

Only problem is whenever I tried to do a learn it failed. I read somewhere saying that if it failed it could be that it doesn't need a learn. No CEL lit up either.
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Abaddon
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyTue Dec 02, 2014 3:38 pm

matt270avian wrote:
Only problem is whenever I tried to do a learn it failed. I read somewhere saying that if it failed it could be that it doesn't need a learn. No CEL lit up either.


You went WOT and bounced off the Fuel Cutoff?

You probably don't need to do it. You didn't load a "fresh" file. You loaded what was already there...

I wouldn't worry about it unless it actually sets a code for it.


Last edited by Abaddon on Tue Dec 02, 2014 3:39 pm; edited 1 time in total
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matt270avian
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyTue Dec 02, 2014 3:39 pm

Abaddon wrote:

matt270avian wrote:
Only problem is whenever I tried to do a learn it failed. I read somewhere saying that if it failed it could be that it doesn't need a learn. No CEL lit up either.


You went WOT and bounced off the Fuel Cutoff?

I wouldn't worry about it unless it actually sets a code for it.

I didn't. It didn't even make it to the stage to prompt me for it.
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deekster_caddy
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Dec 03, 2014 9:10 am

You should probably do a full read before another write if you are having trouble writing.
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Abaddon
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Dec 03, 2014 9:15 am

deekster_caddy wrote:
You should probably do a full read before another write if you are having trouble writing.

No no. It wouldn't let him do a Crankshaft Variation Relearn. It probably doesn't need it considering he loaded a full (old) tune, not a fresh cal which would require a relearn.
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Dec 03, 2014 9:18 am

Abaddon wrote:

deekster_caddy wrote:
You should probably do a full read before another write if you are having trouble writing.


No no. It wouldn't let him do a Crankshaft Variation Relearn. It probably doesn't need it considering he loaded a full (old) tune, not a fresh cal which would require a relearn.

Oh, oh whoops - I read it too quickly. Yeah, okay. I've also seen somewhere that a CASE learn is only for '97 or '98 and newer, and not all 3800s require them.
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matt270avian
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Dec 03, 2014 9:21 am

Plus it was a '96 SC PCM that I got, sooooooo....
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matt270avian
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Dec 10, 2014 12:43 pm

I've gotten the MAF tune pretty much dialed in to where the LTFT are at .781 at WOT (ideally you want 0 or slightly negative, want to avoid positive) and the STFT are locked at 0 under WOT. After a couple of days I can probably have the LTFT's slightly negative and can move on to messing with the timing. Still seeing ~4* of KR under WOT but I blame the slightly positive LTFT's for that. O2 is reading ~860 under WOT which is pretty low, but I'm willing to bet that once I get the LTFT's where they should be my O2 should be reading ~920 under WOT.
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matt270avian
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Apr 08, 2015 8:41 am

Alright, I'm pretty much set where I want to be for now. Fuel trims could use some very slight adjustments (which I will probably do), but I'm pretty happy with what I have so far. Here's a scan in case anyone is interested. Any knock above 4* only happened during shifting.

https://www.dropbox.com/s/f57f9lj5mtkxb1l/4815.csv?dl=0
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charlieRobinson
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Apr 08, 2015 9:31 am

you should add an RPM column to this but..
Rows 230-237 you are getting crap timing + KR. Why are you running a 3.4"?
2627-2633 same thing. you hit 8 degrees of KR @ WOT with crap timing.

you said ~4 * of KR @ WOT but your spreadsheet shows much more than 4, bro.
You have no WOT sections in this scan with decent timing.

Put a bigger pulley on and make more power. you are cheating yourself.
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matt270avian
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Apr 08, 2015 9:36 am

charlieRobinson wrote:
you should add an RPM column to this but..
Rows 230-237 you are getting crap timing + KR. Why are you running a 3.4"?
2627-2633 same thing. you hit 8 degrees of KR @ WOT with crap timing.

you said ~4 * of KR @ WOT but your spreadsheet shows much more than 4, bro.
You have no WOT sections in this scan with decent timing.

Put a bigger pulley on and make more power. you are cheating yourself.

I said anything above 4* was during a shift. I do kind of regret getting rid of the 3.5, but I've got some more stuff coming so I'll take care of that. This was my first test of a new timing table, here's a scan with the stock one.

https://www.dropbox.com/s/us5w5a5rakuyb1z/4615.csv?dl=0
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Apr 08, 2015 9:53 am

i dont know man. didnt look like you were shifting at WOT ~80mph
Add an RPM column so we know where shifts are happening.
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Abaddon
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Apr 08, 2015 10:03 am

charlieRobinson wrote:
i dont know man. didnt look like you were shifting at WOT ~80mph
Add an RPM column so we know where shifts are happening.

+1. RPM should ALWAYS be included in a scan otherwise you'll get lost trying to figure out what happened where...
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matt270avian
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Apr 08, 2015 10:09 am

charlieRobinson wrote:
i dont know man. didnt look like you were shifting at WOT ~80mph
Add an RPM column so we know where shifts are happening.

Shift points are set ~84 IIRC. Will add RPM for future scans.
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charlieRobinson
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Apr 08, 2015 10:09 am

i want to see your WOT timing at 17-18 with 0 KR. LETS GO!
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Abaddon
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Apr 08, 2015 10:13 am

charlieRobinson wrote:
i want to see your WOT timing at 17-18 with 0 KR. LETS GO!

Kids and their Timing rolleyes
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charlieRobinson
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Apr 08, 2015 10:16 am

Abaddon wrote:

charlieRobinson wrote:
i want to see your WOT timing at 17-18 with 0 KR. LETS GO!


Kids and their Timing rolleyes

This is ZZP's Turbo Tim's recommendation for max power on the L67. I did not make up those #s. study
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Abaddon
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Apr 08, 2015 10:32 am

More boost with less timing would be more beneficial in Matts case IMO. He needs all the lower end he can get running around a parking lot....there is more than one way to tune an engine, not just TIMING TIMING TIMING!!! Personal preference and scenario play a HUGE role. He isn't going to be WOT at 84mph running the courses he does. Just sayin....

It's up to Matt though, of course.
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matt270avian
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PostSubject: Re: Matt's Tune Thread   Matt's Tune Thread - Page 3 EmptyWed Apr 08, 2015 10:39 am

Abaddon wrote:
More boost with less timing would be more beneficial in Matts case IMO. He needs all the lower end he can get running around a parking lot....there is more than one way to tune an engine, not just TIMING TIMING TIMING!!! Personal preference and scenario play a HUGE role. He isn't going to be WOT at 84mph running the courses he does. Just sayin....

It's up to Matt though, of course.

For what I do, low end power is more important. It's really really rare that I ever get to the top of second. Most of the time I'm mid-bottom of second. If I stay in first the transmission slips (torque converter?) and the engine will just rev up.
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