Knock retard timers

Discussion of tuning specific to MAZDASPEED3/MAZDASPEED Axela/Mazda 3 MPS vehicles
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mituc
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Knock retard timers

Post by mituc »

I remember that a while ago skiptowncat had some weird KR issue, with the knock retard dissipating fairly slow after the initial occurrence and he increased the Knock Retard Decrement Step sizes from 640 to like 960 or so and the behavior he observed after the change matches the description in Versatuner
Now, my e-tuner (Lex) set them for me from 640 to 400. And it's also this:
http://www.mazdaspeedforums.org/forum/f ... post887019
http://www.mazdaspeedforums.org/forum/f ... post887756

I'm pretty sure it's about the same timers so now I wonder what's the catch. Is the 640 value at the top of some Gaussian distribution bell and any value lower or higher than that will lead to quicker dissipation or what?!
Last edited by mituc on January 7th, 2013, 1:50 am, edited 1 time in total.
2008 Cosmic Blue Mazda 3MPS
Built engine + WMI + GTX3071 gen2, ~509BHP @34PSI
2008 Icy Blue Mazda CX7
Stock engine and exhaust (YES!!), JBR3" + GTX2867 gen2 + Autotech HPFP, self-tuned to 330-ish BHP
skiptownmcat
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Re: Knock retard timers

Post by skiptownmcat »

Hmm.. I would like to know the answer to this too.
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joey
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Re: Knock retard timers

Post by joey »

Me three
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YuraL
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Re: Knock retard timers

Post by YuraL »

I set 320.
Retards are reduced faster than in stock.
400+ Mazda6 MPS
ATP GTX3071, AEM SRI, CPe TIP, Treadstone TR11 FMIC, 3" Rud Exhaust, KMD HPFP, Methanol Injection Kit, CP Forged Pistons, K1 Forged Rods
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mituc
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Re: Knock retard timers

Post by mituc »

Ok, so lowering that value is what we need.

Thanks Yura!
2008 Cosmic Blue Mazda 3MPS
Built engine + WMI + GTX3071 gen2, ~509BHP @34PSI
2008 Icy Blue Mazda CX7
Stock engine and exhaust (YES!!), JBR3" + GTX2867 gen2 + Autotech HPFP, self-tuned to 330-ish BHP
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