Hiccup At WOT

Discussion of tuning specific to MAZDASPEED6/MAZDASPEED Atenza/Mazda 6 MPS vehicles
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kwambe5
Posts: 14
Joined: January 8th, 2021, 3:47 pm

Hiccup At WOT

Post by kwambe5 »

Hello fellow VersaTuners!
I have a map that I have developed from a combination of my old 93Oct and some of the stock tables that come with Versatune that I have used to develop a CST4 map for E30 mix. I have recently been having a slight hiccup under WOT, usually at higher gears/speeds. I cannot seem to see in my logs unless I am missing something that you people who have more experience can see.

Mods are as follows; Corksport - HPFP, EBCS, TMIC, 3" Intake (w/corresponding MAF cal), 3" downpipe, CST4 turbo, TMM insert, RMM. Self-made 3" exhaust, EGR delete, dual catch can setup, Damond PMM and short shift plate, SURE Rear differential mounts and weighted shift knob,
Attachments
VersaTuner Logs Aug.zip
(739.92 KiB) Downloaded 73 times
mituc
VersaTuner guru
Posts: 1324
Joined: December 17th, 2011, 2:47 pm
Location: Iasi/Romania

Re: Hiccup At WOT

Post by mituc »

We don't have your tune to confirm this but it looks like boost cut 100%.
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
kwambe5
Posts: 14
Joined: January 8th, 2021, 3:47 pm

Re: Hiccup At WOT

Post by kwambe5 »

Here is my tune in its current form.
Attachments
CST4KDUB E-30 8_ FSG668 v2.04.vtune
(152.29 KiB) Downloaded 90 times
mituc
VersaTuner guru
Posts: 1324
Joined: December 17th, 2011, 2:47 pm
Location: Iasi/Romania

Re: Hiccup At WOT

Post by mituc »

Ok, so I looked again at the logs and correlated with the tune.
It looks like things start to oscillate when the injector duty cycle exceeds 100%.
With those target AFRs, ignition timing, boost limits and spool strategy you will kill that turbo pretty fast.
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
kwambe5
Posts: 14
Joined: January 8th, 2021, 3:47 pm

Re: Hiccup At WOT

Post by kwambe5 »

Ok, are there changes that you would recommend? Reduce load desired and back off the timing?
mituc
VersaTuner guru
Posts: 1324
Joined: December 17th, 2011, 2:47 pm
Location: Iasi/Romania

Re: Hiccup At WOT

Post by mituc »

Considering how the tune looks like I'd change it all. At this point hiring an e-tuner would not be a bad move at all.
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
kwambe5
Posts: 14
Joined: January 8th, 2021, 3:47 pm

Re: Hiccup At WOT

Post by kwambe5 »

Gotcha! Thanks
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