HKS tune working in Europe on JDM BRZ? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Jonas · 04-11-2023, 06:40 AM

Hi guys,

I moved back to Sweden from Tokyo in 2021 and brought my track car with me; a 2013 Subaru BRZ. At the time the car had some mods including HKS headers, HKS Hi-Power SPEC-L II exhaust, HKS Fire Racing plugs, and a HKS ECU tune. I drove the car quite extensively on the circuit last year with no problems.

This year I just installed the HKS SuperCharger GT2 kit and used the HKS Flash Tool to install the corresponding ECU tune.

However, I'm now getting really nervous that it won't work well with the Swedish fuel after installing the supercharger. We have 95 and 98 octane fuel in Sweden, the 95 octane has a 10% ethanol mix and the 98 octane has a 5% ethanol mix (for green house gas emission reduction reasons).

I will of course only run the 98 octane fuel, but how compatible is that with the Japanese "premium" fuel that I assume the tune is configured for? Will I run into knocking problems and potentially damage my engine?

Would love some feedback from someone who knows more about this.

Thanks,

Jonas

tomm.brz · 04-11-2023, 07:19 AM

can t you look at vital parameters like adcabce multiplier abd knock corection and ap fine correction?
hks tunes are rich and a bit conservative you should be ok with 98ron
but never put 95

Jonas · 04-11-2023, 08:58 AM

Quote:

Originally Posted by tomm.brz

can t you look at vital parameters like adcabce multiplier abd knock corection and ap fine correction?
hks tunes are rich and a bit conservative you should be ok with 98ron
but never put 95

Well, how do I look at those? Sorry for being new to this. Any software you can guide me to?

Good to hear that 98 should be OK! Thanks! 🙏

tomm.brz · 04-11-2023, 09:08 AM

well here almost nobody have an hks flasher, those tune files also are not editable

But maybe if you connect it to the obd2 in your car, there is a section where you can see live data of the ecu while driving

Jonas · 04-13-2023, 01:24 AM

Quote:

Originally Posted by tomm.brz

well here almost nobody have an hks flasher, those tune files also are not editable

But maybe if you connect it to the obd2 in your car, there is a section where you can see live data of the ecu while driving

Unfortunately it doesn't seem to have that functionality. Thanks anyway.

gpvecchi · 04-13-2023, 03:25 PM

HKS tune for EU models? AFAIK it's available only for US or JP models...

tomm.brz · 04-13-2023, 03:34 PM

he has a jdm model from tokyo, probably A01A calibration

04-11-2023, 06:40 AM	#1
Jonas Junior Member Join Date: Aug 2020 Drives: Subaru BRZ, Jaguar F-Type V6 Location: Tokyo, Japan Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	HKS tune working in Europe on JDM BRZ? Hi guys, I moved back to Sweden from Tokyo in 2021 and brought my track car with me; a 2013 Subaru BRZ. At the time the car had some mods including HKS headers, HKS Hi-Power SPEC-L II exhaust, HKS Fire Racing plugs, and a HKS ECU tune. I drove the car quite extensively on the circuit last year with no problems. This year I just installed the HKS SuperCharger GT2 kit and used the HKS Flash Tool to install the corresponding ECU tune. However, I'm now getting really nervous that it won't work well with the Swedish fuel after installing the supercharger. We have 95 and 98 octane fuel in Sweden, the 95 octane has a 10% ethanol mix and the 98 octane has a 5% ethanol mix (for green house gas emission reduction reasons). I will of course only run the 98 octane fuel, but how compatible is that with the Japanese "premium" fuel that I assume the tune is configured for? Will I run into knocking problems and potentially damage my engine? Would love some feedback from someone who knows more about this. Thanks, Jonas

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04-11-2023, 07:19 AM	#2
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,199 Thanks: 500 Thanked 1,067 Times in 775 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	can t you look at vital parameters like adcabce multiplier abd knock corection and ap fine correction? hks tunes are rich and a bit conservative you should be ok with 98ron but never put 95

04-11-2023, 09:08 AM	#4
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,199 Thanks: 500 Thanked 1,067 Times in 775 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	well here almost nobody have an hks flasher, those tune files also are not editable But maybe if you connect it to the obd2 in your car, there is a section where you can see live data of the ecu while driving

04-13-2023, 03:25 PM	#6
gpvecchi Senior Member Join Date: Mar 2018 Drives: Toyota 86 GT Limited PP (Model G) Location: Italy Posts: 1,018 Thanks: 406 Thanked 335 Times in 187 Posts Mentioned: 14 Post(s) Tagged: 0 Thread(s)	HKS tune for EU models? AFAIK it's available only for US or JP models...

04-13-2023, 03:34 PM	#7
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,199 Thanks: 500 Thanked 1,067 Times in 775 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	he has a jdm model from tokyo, probably A01A calibration

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