Mechanical Idle Set

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Mechanical Idle Set

Unread postby Mikestang » Thu Jun 27, 2019 10:14 am

Trying this for the first time. I want to set my Racecar to just use mechanical idle, DA1 LUX0. I see the write up for setting Mechanical Idle, just have a few clarification questions.

FN800 "Allow 0% ISCDC at 0 lbs/hr, remove clip of 10%, Clip max ISCDC to 98%, reduce 100% values" Make 0 lb = 0% (was10%) understand that, Top 2 are 100% so I change them to 98%, then says Reduce 100% values... is that just a dual statement saying to reduce the 100% values to 98%?


Then set my deseried idle with the base screw and get TPS back to .9ish volts?

So Idle air tuning in all in the ISC multiplier table? How much effect will this have?
Everyday I learn how much I don't know....
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Re: Mechanical Idle Set

Unread postby decipha » Thu Jun 27, 2019 11:46 am

thats not advisable on map strategies since so much is dependent on accurate air anticipation. On mass air its measured so no big deal but MAP is quite a bit different.

but yeah correct simply change the 1.00 dc to .98 to clip the isc just as you have done

tps voltage doesn't matter on fords

fn875 the airmass function for idle needs to be set to all .6s to nullify it and ITHBMA the throttle body airmass subtractor needs to be set to 0

then go reduce the isc multiplier to 0.172 at warm stable idle and dial in the throttle stop so ipsibr is at or near 0.00 at warm stable idle

then go dial in the isc multiplier for cold starts just as you would otherwise
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Re: Mechanical Idle Set

Unread postby Mikestang » Thu Jun 27, 2019 1:19 pm

Thanks, maybe Ill just revisit the other way.

Quick Q (for Decipha), I read somewhere that you suggested setting all injector timing cells to 500? You said it helped with fuel smells at idle, less time for fuel to puddle on the back of the valve. Is this accurate? CAnt find where I read that.
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Re: Mechanical Idle Set

Unread postby decipha » Thu Jun 27, 2019 2:56 pm

yep been doing that on all my tunes for the past 10 yrs, its prob covered in the fuel write up
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Re: Mechanical Idle Set

Unread postby gamh44 » Thu Jun 27, 2019 2:56 pm

Was just reading this the other day ...

http://www.efidynotuning.com/cam.htm

Down the bottom of the page under Injector Timing.
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Re: Mechanical Idle Set

Unread postby Mikestang » Thu Jun 27, 2019 3:51 pm

gamh44 wrote:Was just reading this the other day ...

http://www.efidynotuning.com/cam.htm

Down the bottom of the page under Injector Timing.


Thanks man, I was thinking there was a pic of the table with it. Good to know I did not imagine it
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(many more mods...)
Moates QH chip
Binary Editor software w/Innovate software
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86 Capri EFI 5.0L Engine
Mostly Stock, F-cam, Valvetrain upgrades, Long Tube headers
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Re: Mechanical Idle Set

Unread postby mustangdriver » Mon Jul 08, 2019 12:14 pm

I set ITHBMA to 0. When starting the engine, it turns too high - over 1500 rpm. After a few seconds, he always swings up and down between 1000-1300.
ITHBMA set to 0.550 - all ok. Engine is immediately stable with 900 rpm in cold condition.
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Re: Mechanical Idle Set

Unread postby Mikestang » Wed Jul 10, 2019 9:37 am

mustangdriver wrote:I set ITHBMA to 0. When starting the engine, it turns too high - over 1500 rpm. After a few seconds, he always swings up and down between 1000-1300.
ITHBMA set to 0.550 - all ok. Engine is immediately stable with 900 rpm in cold condition.


.550 is where my setting is stock. I would usually log calculated air flow from the MAF and to obtain this air flow number. But this is a SD computer and it does not give me a lbmin air flow number to enter in this field.
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Trick Flow upper and lower extrude honed
(many more mods...)
Moates QH chip
Binary Editor software w/Innovate software
A3M1
Vehicle 2 Information: 1981 Mustang SCCA A-Sedan car Restored by Me
86 Capri EFI 5.0L Engine
Mostly Stock, F-cam, Valvetrain upgrades, Long Tube headers
DA1 PCM, Using BE and QH with Innovate AFR

Re: Mechanical Idle Set

Unread postby Mikestang » Mon Jul 15, 2019 9:40 am

I decided to go ahead an try the mechanical idle setup. Seems to be working pretty good. Only issue is a high rev at start up. I can see that IAC command at crank is 100% but I cannot find in the tune where to adjust this? DA1 where is this control at?
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347 Stroker, custom cam, 185 CNC Trick Flow heads w/PAC springs
Trick Flow upper and lower extrude honed
(many more mods...)
Moates QH chip
Binary Editor software w/Innovate software
A3M1
Vehicle 2 Information: 1981 Mustang SCCA A-Sedan car Restored by Me
86 Capri EFI 5.0L Engine
Mostly Stock, F-cam, Valvetrain upgrades, Long Tube headers
DA1 PCM, Using BE and QH with Innovate AFR

Re: Mechanical Idle Set

Unread postby decipha » Mon Jul 15, 2019 3:24 pm

off the top of my head fn884 is the number that comes to mind ita the cranking iscdc lower it if the iscdc is commanded too high during crank

immediately after fire off the isc nultiplier table comes in to play so if its after crank the iscdc ia high you need to dial in the isc multiplier table
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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
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Re: Mechanical Idle Set

Unread postby Mikestang » Mon Jul 15, 2019 5:54 pm

decipha wrote:off the top of my head fn884 is the number that comes to mind ita the cranking iscdc lower it if the iscdc is commanded too high during crank

immediately after fire off the isc nultiplier table comes in to play so if its after crank the iscdc ia high you need to dial in the isc multiplier table



No FN884 comes up in a search. I even searched crank, or crank isc, that's what I assumed it would be under. Nothing though.
Ya is only during crank, come down to idle immediately after starts.
Everyday I learn how much I don't know....
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Trick Flow upper and lower extrude honed
(many more mods...)
Moates QH chip
Binary Editor software w/Innovate software
A3M1
Vehicle 2 Information: 1981 Mustang SCCA A-Sedan car Restored by Me
86 Capri EFI 5.0L Engine
Mostly Stock, F-cam, Valvetrain upgrades, Long Tube headers
DA1 PCM, Using BE and QH with Innovate AFR

Re: Mechanical Idle Set

Unread postby Mikestang » Wed Jul 17, 2019 2:23 pm

Anyone else have any idea where the cranking IAC preposition setting is in a DA1?
Everyday I learn how much I don't know....
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Vehicle Information: 1986 Ford Mustang GT, Sonic Blue
347 Stroker, custom cam, 185 CNC Trick Flow heads w/PAC springs
Trick Flow upper and lower extrude honed
(many more mods...)
Moates QH chip
Binary Editor software w/Innovate software
A3M1
Vehicle 2 Information: 1981 Mustang SCCA A-Sedan car Restored by Me
86 Capri EFI 5.0L Engine
Mostly Stock, F-cam, Valvetrain upgrades, Long Tube headers
DA1 PCM, Using BE and QH with Innovate AFR

Re: Mechanical Idle Set

Unread postby decipha » Wed Jul 17, 2019 4:04 pm

if u cant find it then you may not have access to it
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decipha
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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: Mechanical Idle Set

Unread postby mustangdriver » Sun Jul 21, 2019 5:57 am

capture_21072019_135535.jpg
Try it as in my examples
You do not have the required permissions to view the files attached to this post.
my english is not good, but my Mustangs are top :)
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Edelbrock Heads, Carb, Manifold, V2a Headers, X-pipe, 340HP

Re: Mechanical Idle Set

Unread postby Mikestang » Sun Jul 21, 2019 9:14 am

mustangdriver wrote:
capture_21072019_135535.jpg
Try it as in my examples


Neither look like my stock table. Are u suggesting changing Idle Airflow Drive Lb to all .7?
Everyday I learn how much I don't know....
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Mikestang
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Posts: 87
Joined: Mon Oct 14, 2013 7:58 pm
Location: Firestone, CO
Name: Mike
Vehicle Information: 1986 Ford Mustang GT, Sonic Blue
347 Stroker, custom cam, 185 CNC Trick Flow heads w/PAC springs
Trick Flow upper and lower extrude honed
(many more mods...)
Moates QH chip
Binary Editor software w/Innovate software
A3M1
Vehicle 2 Information: 1981 Mustang SCCA A-Sedan car Restored by Me
86 Capri EFI 5.0L Engine
Mostly Stock, F-cam, Valvetrain upgrades, Long Tube headers
DA1 PCM, Using BE and QH with Innovate AFR

Re: Mechanical Idle Set

Unread postby Mikestang » Tue Jul 23, 2019 11:42 am

Emailed Derek, he said that Dashpot Preposition was not in the LUX0.cry file. He has added it and sent out a new LUX0 file to the people that had bought it from him.

Have not been home to look at the file yet. Derek said that stock command during cranking is 60%... so not sure why mine is saying 100%.
Everyday I learn how much I don't know....
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Mikestang
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Posts: 87
Joined: Mon Oct 14, 2013 7:58 pm
Location: Firestone, CO
Name: Mike
Vehicle Information: 1986 Ford Mustang GT, Sonic Blue
347 Stroker, custom cam, 185 CNC Trick Flow heads w/PAC springs
Trick Flow upper and lower extrude honed
(many more mods...)
Moates QH chip
Binary Editor software w/Innovate software
A3M1
Vehicle 2 Information: 1981 Mustang SCCA A-Sedan car Restored by Me
86 Capri EFI 5.0L Engine
Mostly Stock, F-cam, Valvetrain upgrades, Long Tube headers
DA1 PCM, Using BE and QH with Innovate AFR


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