developing a plan

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Re: developing a plan

Unread postby decipha » Fri Sep 13, 2019 2:46 pm

first dial in the maf curve

the maf histogram will do it for you in cloaed loop just aimply apply the error and repeat. No need in making logs til after you get the fuel dialed in.
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Re: developing a plan

Unread postby canuck1 » Fri Sep 13, 2019 4:04 pm

So how does the maf histogram produce and store its values? If its not log file data then where are the MAF_N vs Imaf vs Fuel error1 values stored or associated with? I guess I always assumed they were produced as you began logging data and so were tied to datalog files somehow?

Sean
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Re: developing a plan

Unread postby decipha » Fri Sep 13, 2019 4:38 pm

no its saved in temporary memory and is erased when you press clear or close out tunerpro
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Vehicle Information: Supercoupin' x10
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91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce
07 GMC 2500HD 6L - Veranafer

Re: developing a plan

Unread postby canuck1 » Sat Sep 14, 2019 2:48 pm

So which value format do I use from Hist_MAF? Average? Running Average? And do I use these values to multiply and change corresponding MAF Transfer Function values?

Sean
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A9L ECM E9ZF-12A650-A2A with Moates F3 chip, Burn2, Quarterhorse, A9L2 calibration

Re: developing a plan

Unread postby decipha » Sat Sep 14, 2019 3:34 pm

running average

yes its the multiplier for the maf correction

see the fuel write up
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91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
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98 Camaro SS - Bounquisha
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03 Marauder - DyShyKy
00 Explorer 5L - Bernyce
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Re: developing a plan

Unread postby canuck1 » Sat Sep 14, 2019 11:45 pm

OK, got it. I'm still working on understanding what the fuel write up is instructing me to do. Some of the info is broken or missing?
"If PRLDSW=0 and FN035 is scaled properly as per the Scaling Write Up your fuel table should be set as follows: FN1362 Base Fuel Table" The link to the image of FN1362 Base Fuel Table is broken and not viewable.

It seems to suggest that it would be easier to dial in fuel by adjusting the 3 injector values as opposed to 30 MAF cells:

"why bother with adjusting 30pts on a maf curve if you can change just 3 injector values and your fuel is perfect every time?"

and yet it doesn't tell me where to go to get the correction data for injectors or how and where to apply it.

Once I have identified my corrections are NOT linear, how do I go about modifying injector values? Do I need to install my wideband to do this or can I use one of the fuel error histograms to provide the correction percentage and then multiply this by either hi slope, low slope or breakpoint (depending on where the error range is occuring)?

I'm trying not to start adjusting things only to have someone tell me "shoulda done THIS first..." and then have to go back and do it all again!

I think this thing is drivable. I'm going to drive it to the pump and fill it tomorrow if the weather cooperates.

Sean
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351w based 396 c.i. stroker. Mass-Flo-EFI style intake w 46lb Pico injectors, AFR 195CC Renegade heads, Comp XE274HR, 10.4:1 CR, custom long tube headers and sidepipes. 5spd manual trans, 3.73:1 rear.
A9L ECM E9ZF-12A650-A2A with Moates F3 chip, Burn2, Quarterhorse, A9L2 calibration

Re: developing a plan

Unread postby decipha » Sun Sep 15, 2019 12:13 am

yes ive been meaning to update the fuel write up to include more details just hadnt the time

see the a9l2 tune for the fuel table

the only way you can dial in fuel using the injector data is if you have a known actual dialed in maf curve

otherwise you have to dial in fuel using the maf transfer first

then, you can use the fuel error histogram to see how your fuel fluctuates and use that to dial in the injectors.
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decipha
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Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce
07 GMC 2500HD 6L - Veranafer

Re: developing a plan

Unread postby canuck1 » Sun Sep 15, 2019 6:40 pm

Thanks. I checked FN1307/1362 and the values look correct for what you've suggested.

I drove to the pump today. Drama free. Its less than a mile from my house, so I took the chance and it behaved pretty normally. I didn't give it any more throttle than required to get moving.

With rain threatening, I wasn't able to log any of the drive though. My car has no top, I didn't want to get caught in the open with my laptop out beside me. Are these Hist_MAF values usable to begin applying against my MAF transfer function values? See attached image from earlier log.

Sean
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Name: Sean Gibbs
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351w based 396 c.i. stroker. Mass-Flo-EFI style intake w 46lb Pico injectors, AFR 195CC Renegade heads, Comp XE274HR, 10.4:1 CR, custom long tube headers and sidepipes. 5spd manual trans, 3.73:1 rear.
A9L ECM E9ZF-12A650-A2A with Moates F3 chip, Burn2, Quarterhorse, A9L2 calibration

Re: developing a plan

Unread postby decipha » Sun Sep 15, 2019 6:44 pm

yep apply those corrections and go for another cruise weather permitting and repeat until eventually all of your errors are as close to 1 as you can get them
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decipha
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Posts: 17845
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce
07 GMC 2500HD 6L - Veranafer

Re: developing a plan

Unread postby canuck1 » Tue Oct 01, 2019 2:04 pm

Spark table questions. Excuse my ignorance. I've read the spark write up, and I thought I was premature in wanting to do this yet, but its been recommended I add the additional timing I can afford now (before I've finished dialing in MAF etc.). I have AFR 195cc Renegade cylinder heads and I run 94 octane fuel exclusively. My heads aren't specifically listed in the MBT Reference Chart values provided, but I see AFR (36, 48) , as well as AFR 205 (33, 44). Being conservative, I'd probably opt for the lower advance range. Anyone willing to suggest a better option?

This is what I came up with (see attached)

Does this look like a reasonable starting point? Altogether too much?

Thanks for any input.

Sean
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canuck1
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Posts: 85
Joined: Fri May 10, 2019 2:40 pm
Location: Victoria, BC CANADA
Name: Sean Gibbs
Vehicle Information: Factory 5 roadster
351w based 396 c.i. stroker. Mass-Flo-EFI style intake w 46lb Pico injectors, AFR 195CC Renegade heads, Comp XE274HR, 10.4:1 CR, custom long tube headers and sidepipes. 5spd manual trans, 3.73:1 rear.
A9L ECM E9ZF-12A650-A2A with Moates F3 chip, Burn2, Quarterhorse, A9L2 calibration

Re: developing a plan

Unread postby decipha » Thu Oct 03, 2019 11:02 am

looks good to me
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decipha
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Posts: 17845
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce
07 GMC 2500HD 6L - Veranafer

Re: developing a plan

Unread postby canuck1 » Tue Oct 08, 2019 2:20 pm

I have a general question about how to approach dialing in fuel via modifying MAF values. If it seems like I've asked this before, its because I'm still not understanding what I've reviewed here or in the write ups.

1.) I only have partial injector specs, and so, reason to doubt the values I've inserted in my tune. Will making changes to MAF transfer function essentially mask the issue if my injector slopes or breakpoint are the things that need attention? In other words, once my MAF values are all within .97-1.03 fuel error percentage, is it still possible for the injector parameters to be in need of correction and will I be able to identify which injector parameter needs the love?

2.) Is there a way to identify breakpoint in my injector slopes from datalogs? I'm using a generic breakpoint value from a GUFB A9L bin, since I don't have one for my injectors. What can I use to help tell me whether I'm close enough or WAY off!?

Sean
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canuck1
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Posts: 85
Joined: Fri May 10, 2019 2:40 pm
Location: Victoria, BC CANADA
Name: Sean Gibbs
Vehicle Information: Factory 5 roadster
351w based 396 c.i. stroker. Mass-Flo-EFI style intake w 46lb Pico injectors, AFR 195CC Renegade heads, Comp XE274HR, 10.4:1 CR, custom long tube headers and sidepipes. 5spd manual trans, 3.73:1 rear.
A9L ECM E9ZF-12A650-A2A with Moates F3 chip, Burn2, Quarterhorse, A9L2 calibration

Re: developing a plan

Unread postby decipha » Tue Oct 08, 2019 3:01 pm

yes if you dial in the maf the injector inconsistencies will show themselves. Thats what the fuel error histogram is for. For any given maf voltage (ad count) the fuel error will be 0. If you don't have the exact same fuel error for a specific maf count at all conditions then your injectors need to be dialed in.

if you have the mass flow maf setup then load in that maf curve and leave it then dial in only the injectors.
User avatar
decipha
Tooner
 
Posts: 17845
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce
07 GMC 2500HD 6L - Veranafer

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