May 20, 2012, 11:45:20 AM
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Author Topic: Begining to Tune  (Read 645 times)

92Laser

  • JACKAL Owner
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  • Posts: 4
    • 1992
    • Laser RS Turbo
    • Motor: 4G63 2.0L
    • Head: 1G (large ports)
    • Turbo: GT30R
Begining to Tune
« on: July 03, 2011, 01:04:30 PM »
Okay, so I've read The guide by Hac  :rtfm And i'm curious about one thing, if the car had been previously tuned shoudl i use that same tune but set it up w/ 13.07 TOp and 11.00 bottom half on the AFR? that way the timing and EVERYTHING is the same as it was just not hte AFR and then tune from therE? Also, if anyone is willing or wanting to help me in this feel free to EMail me, Thank you!
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John_H

  • JACKAL Owner
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  • Posts: 227
    • 1991
    • Talon TSI AWD
    • Motor: 4G63 2.0L
    • Head: 1G (large ports)
    • Turbo: gt3076r
Re: Begining to Tune
« Reply #1 on: July 15, 2011, 03:17:50 PM »
the fuel table is only for the closed loop part of your tune.

So, whatever you setup your closed loop for(its very rudimentary, only tps is used) make that what you want.  Idle and very light cruise(row 1 and 2 probably) 14.7 or so.  Taper it down to where you are not in closed loop anymore going richer as you go further down the table(higher load rows)
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hakcenter

  • dev team
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  • Posts: 1047
    • 2006
    • Other
    • Motor: 4G63 2.0L
    • Head: 1G (large ports)
Re: Begining to Tune
« Reply #2 on: July 15, 2011, 10:16:19 PM »
Quote from: John_H on July 15, 2011, 03:17:50 PM
the fuel table is the target AFR unless in closed loop part.

Fixed
The fuel table is the target at all times, if your not in closed loop. No real reason to even enable closed loop IMHO.

If the car was tuned before, ya I'd just mess with the fuel ratios, IF you think the timing is what you want. Who's to know.
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AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.

John_H

  • JACKAL Owner
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  • Posts: 227
    • 1991
    • Talon TSI AWD
    • Motor: 4G63 2.0L
    • Head: 1G (large ports)
    • Turbo: gt3076r
Re: Begining to Tune
« Reply #3 on: August 22, 2011, 10:22:19 PM »
how can the program/ecu target a certain air/fuel ratio without knowing where the hell it is in relation to it? How does it know if its rich or lean compared to its target? 

If its in open loop its not getting feedback from its sensors.
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hakcenter

  • dev team
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  • Posts: 1047
    • 2006
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    • Motor: 4G63 2.0L
    • Head: 1G (large ports)
Re: Begining to Tune
« Reply #4 on: August 22, 2011, 11:36:18 PM »
Quote from: John_H on August 22, 2011, 10:22:19 PM
how can the program/ecu target a certain air/fuel ratio without knowing where the hell it is in relation to it? How does it know if its rich or lean compared to its target? 

If its in open loop its not getting feedback from its sensors.

Complicated algorithm's
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AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.

Kapok6

  • WEREWOLF Owner
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  • Posts: 283
  • 'ello poppet
    • 1991
    • Talon TSI AWD
    • Motor: 4G63 2.0L
    • Head: 2G (small ports)
    • Turbo: FP3065
Re: Begining to Tune
« Reply #5 on: September 26, 2011, 04:28:24 PM »
Quote from: hakcenter on August 22, 2011, 11:36:18 PM
Quote from: John_H on August 22, 2011, 10:22:19 PM
how can the program/ecu target a certain air/fuel ratio without knowing where the hell it is in relation to it? How does it know if its rich or lean compared to its target? 

If its in open loop its not getting feedback from its sensors.

Complicated algorithm's

 ::)  Love Haks responses
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1991 Eagle Talon TSi AWD-Ross 8:3.1 pistons, Eagle rods, ACL Race bearings, 2g small port head, HKS/Delta 272 cams, Evo springs/retainers, FP3065 @ 28psi (hopefully), FIC 1550's, Apex'i N1 turbo back exhaust, KYB GR-2's on Suspension Technnique springs, megan sturt bars, poly mounts/bushings

jrohner

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    • 1991
    • Eclipse GSX
    • Motor: 4G63 2.0L
    • Head: 1G (large ports)
    • Turbo: 16G
Re: Begining to Tune
« Reply #6 on: September 27, 2011, 10:11:08 PM »
Quote from: John_H on August 22, 2011, 10:22:19 PM
how can the program/ecu target a certain air/fuel ratio without knowing where the hell it is in relation to it? How does it know if its rich or lean compared to its target? 

If its in open loop its not getting feedback from its sensors.

It's not targeting an AFR, it's calculating the amount of fuel to inject to get what it thinks would be that AFR.
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