Flatshift timed ignition retard

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TurboFan
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Flatshift timed ignition retard

Post by TurboFan »

Hi guys!
What can I do to retard ignition after flatshift? I need this to prevent clutch from slipping immediatly after gear change on high boost. Didn't see any feature like Timed Retard After Launch for Flatshift. Also MAP accel triggering after flatshift going me crazy because it configured for spool time in gear not boost increase after gear change.
BMW 525i, stroker 2.8L, MS3-Pro 1.4.1, BIPs 373, 66mm turbo 30 psi
TurboFan
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Re: Flatshift timed ignition retard

Post by TurboFan »

Nobody has a mod?
BMW 525i, stroker 2.8L, MS3-Pro 1.4.1, BIPs 373, 66mm turbo 30 psi
Matt Cramer
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Re: Flatshift timed ignition retard

Post by Matt Cramer »

The code currently doesn't have a feature for the timing retard part. But if you post up an MSQ and data log, we can have a look at the AE issue part.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
TurboFan
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Re: Flatshift timed ignition retard

Post by TurboFan »

Why not? Timed retard launch presents. Can somebody point me in sources where is flatshift logic? I see only DO_LAUNCH. Is it pseudo flatshift based on launch algorithm?
BMW 525i, stroker 2.8L, MS3-Pro 1.4.1, BIPs 373, 66mm turbo 30 psi
mega_user
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Re: Flatshift timed ignition retard

Post by mega_user »

It would be great to have a timing retard function with flat shift. Instead of just ignition cut.
For sequential gearbox gearchage timing retard is enough to allow gearbox disengage and engage next gear.
TurboFan
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Re: Flatshift timed ignition retard

Post by TurboFan »

mega_user wrote:It would be great to have a timing retard function with flat shift. Instead of just ignition cut.
For sequential gearbox gearchage timing retard is enough to allow gearbox disengage and engage next gear.
May be to add an option in shift cut to change logic from ignition cut to retard.

Going crazy rebuilding and upgrading my clutch to support flatshift on 2 bar with 66mm turbo :D
BMW 525i, stroker 2.8L, MS3-Pro 1.4.1, BIPs 373, 66mm turbo 30 psi
TurboFan
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Re: Flatshift timed ignition retard

Post by TurboFan »

This is how done in basic EMU ECU from Poland for 600$ and plus 100$ for ETC module.
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MS3-Pro for 1200$ can't do this. :?
BMW 525i, stroker 2.8L, MS3-Pro 1.4.1, BIPs 373, 66mm turbo 30 psi
Paul_VR6
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Re: Flatshift timed ignition retard

Post by Paul_VR6 »

Ms users are expected to have proper hardware including a clutch.
-Paul
1992 Corrado SLC 3.6 VR6 11.38@120 - MS3 Pro Ultimate - Microsquirt I/O - Can EGT - Racepak IQ3s
kptuned.com - Megasquirting the World! Megasquirt Sales, Service, Tuning and More!
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Matt Cramer
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Re: Flatshift timed ignition retard

Post by Matt Cramer »

TurboFan wrote:Why not?
Mostly, because it previously hasn't been asked for. The features being added to the code had been temporarily tied off at the time you asked to focus on getting 1.5.1 into release status.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
vw_chuck
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Re: Flatshift timed ignition retard

Post by vw_chuck »

Didn't a motorcycle guy request this just recently? He was having issue with blowing up his tranny on shifts because the power came back on so hard.
TurboFan
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Re: Flatshift timed ignition retard

Post by TurboFan »

Matt Cramer wrote: Mostly, because it previously hasn't been asked for. The features being added to the code had been temporarily tied off at the time you asked to focus on getting 1.5.1 into release status.
I didn't ask for 1.5.1 happy with proven and stable 1.4.1 :D
Just give me Ignition retard time and Restore rate in Flatshift so clutch will be alive after 1/4 mile. Vipec and Link users laughing at me. :roll:
BMW 525i, stroker 2.8L, MS3-Pro 1.4.1, BIPs 373, 66mm turbo 30 psi
Matt Cramer
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Re: Flatshift timed ignition retard

Post by Matt Cramer »

TurboFan wrote:I didn't ask for 1.5.1 happy with proven and stable 1.4.1
Features get added to the latest version. If this one makes the cut, the soonest it could be added would be 1.5.2.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
TurboFan
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Re: Flatshift timed ignition retard

Post by TurboFan »

Matt Cramer wrote:
TurboFan wrote:I didn't ask for 1.5.1 happy with proven and stable 1.4.1
Features get added to the latest version. If this one makes the cut, the soonest it could be added would be 1.5.2.
Will waiting for configurable flatshift retard.
BMW 525i, stroker 2.8L, MS3-Pro 1.4.1, BIPs 373, 66mm turbo 30 psi
DNMakinson
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Re: Flatshift timed ignition retard

Post by DNMakinson »

Interesting. Turbofan, could it be that your clutch switch could use adjustment such that it transitions right at the top of the pedal stroke? If it is opening too soon as you re-engage, then power will be applied too soon, before the pressure plate is fully loading the clutch.

Just a thought.
jeffmarsh750
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Re: Flatshift timed ignition retard

Post by jeffmarsh750 »

Yes, I asked for it. Clutch slippage will keep the trans from breaking, too much and it smokes the clutch. A little torque control will help everyone. Make sure timing can be ramped back in at a progressive rate over time or it won't help anything.
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TurboFan
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Re: Flatshift timed ignition retard

Post by TurboFan »

jeffmarsh750 wrote:Yes, I asked for it. Clutch slippage will keep the trans from breaking, too much and it smokes the clutch. A little torque control will help everyone. Make sure timing can be ramped back in at a progressive rate over time or it won't help anything.
Yes timing must be ramped back in at configurable progressive rate over time after clutch switch. Without this feature I broke 2nd gear while flatshifting on medium boost at drag event.
BMW 525i, stroker 2.8L, MS3-Pro 1.4.1, BIPs 373, 66mm turbo 30 psi
acab
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Re: Flatshift timed ignition retard

Post by acab »

bump.

any news?
acab
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Re: Flatshift timed ignition retard

Post by acab »

jsmcortina, could you check this one future request?
ekam99
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Re: Flatshift timed ignition retard

Post by ekam99 »

Same here!!!
WOuld love to have a progressive restore of timing after FS. My issue is much more serious than a clutch slippage. I got a strong knock after releasing the clutch and even with proper knock retard, it got enough time to kill the piston ring grooves. Already opened the engine twice for piston replacement.

Please, add this feature!
jsmcortina
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Re: Flatshift timed ignition retard

Post by jsmcortina »

ekam99 wrote:WOuld love to have a progressive restore of timing after FS. My issue is much more serious than a clutch slippage. I got a strong knock after releasing the clutch and even with proper knock retard, it got enough time to kill the piston ring grooves. Already opened the engine twice for piston replacement.
I do not understand how this is related to knock. Could you explain why that would be the case?

I can understand the torque issue and how a timing slew could soften the blow on the clutch, gearbox etc.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

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