Ansix Auto FA24 BRZ/GR86 Accusump Oil Pressure Drop Testing Results - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Ansix Auto · 08-31-2023, 04:07 PM

We've uploaded a video showing our results from testing a 2qt Accusump on our 2023 Subaru BRZ Track car.

Please feel free to comment on YouTube or post here if you have any questions.

BioRebel · 09-01-2023, 03:53 PM

You mention seeing a drop due to the JR dual radiator being paired with the OEM exchanger. But I'm not sure you specified what the drop looked like. Was it just a lower overall pressure? Or were the dips worse (longer and lower)?

Ansix Auto · 09-01-2023, 06:03 PM

The pressure drops were from the cornering. The lower overall pressure was due to the JR radiator and oil cooler combo. The instructions suggest to install it along with the stock heat exchanger. We removed the stock heat exchanger to offset the additional resistance caused by the JR cooler.

As mentioned in the video, the JR cooler makes your oil pressure around 30psi lower vs without. Removing the stock HX recovers about 10psi.

Ultramaroon · 09-01-2023, 07:04 PM

Thanks very much for so effectively testing and reporting your results. @blsfrs, did you see this? Starvation issues aside, it looks like your experience with the JR radiator is not unique. I'm more disappointed than surprised. Caveat emptor.

BioRebel · 09-01-2023, 07:31 PM

Quote:

Originally Posted by Ansix Auto

The pressure drops were from the cornering. The lower overall pressure was due to the JR radiator and oil cooler combo. The instructions suggest to install it along with the stock heat exchanger. We removed the stock heat exchanger to offset the additional resistance caused by the JR cooler.

As mentioned in the video, the JR cooler makes your oil pressure around 30psi lower vs without. Removing the stock HX recovers about 10psi.

That is an insane amount and one I've not seen reported by anyone else. Do you have data to back this claim up?

DarkSunrise · 09-01-2023, 07:59 PM

Quote:

Originally Posted by Ansix Auto

As mentioned in the video, the JR cooler makes your oil pressure around 30psi lower vs without. Removing the stock HX recovers about 10psi.

Does that mean pulling the stock HX is worth 10 psi on a stock setup? If so, I'm going to pull it and add a dedicated OC. I know from the 1st gen that the Setrab 613 core is only about a 5 psi restriction (by itself, no lines). Sounds like a dedicated OC would be a better solution (less or comparable restriction, much more cooling).

Ansix Auto · 09-01-2023, 08:27 PM

Yes it does, but the 10psi is done at 95*C oil temp. The difference will be smaller at higher oil temps / lower oil viscosities. You're right about the dedicated cooler, that's what we mention in our recommendations in the video.

BioRebel, check out this post about the JR radiator / cooler combo.

https://www.ft86club.com/forums/show...&postcount=346

toyota_86 · 09-01-2023, 10:46 PM

Can you take off the heat exchanger carefully so it can be replaced and look like it hasn't been touched if failure happens?

Ansix Auto · 09-01-2023, 10:56 PM

Absolutely you can.

VoltsFRS2013 · 09-02-2023, 12:16 AM

So pretty much, to mitigate the oiling issues on track you need to money dump another what, $5 - $8k in parts im assuming?

Unfortunate.

Ansix Auto · 09-02-2023, 12:53 AM

Where did that price come from?

Just use a good oil and the accusump with install kit is $600.

You can skip the baffle. It’s up to you if you want an oil cooler.

BioRebel · 09-02-2023, 10:24 AM

Quote:

Originally Posted by Ansix Auto

Yes it does, but the 10psi is done at 95*C oil temp. The difference will be smaller at higher oil temps / lower oil viscosities. You're right about the dedicated cooler, that's what we mention in our recommendations in the video.

BioRebel, check out this post about the JR radiator / cooler combo.

https://www.ft86club.com/forums/show...&postcount=346

That post documents a 10psi drop. Even still I've seen videos and data from others that doesn't show a drop as high as you're claiming.

Ansix Auto · 09-02-2023, 01:35 PM

Thats the data we collected. We have no reason to make it up. I’ve posted the deltas on the other forum. Feel free to disregard it.

We’re not the only ones that have documented this.

https://www.*********/threads/vincen...23/post-150985

OldBiker · 09-03-2023, 03:19 AM

Any theories as to what is causing the pressure drop? The pickup is starved of oil, the pump loses prime, etc? If so, where is the oil during the right turn?

PS: Nice video and thanks for doing the work.

08-31-2023, 04:07 PM	#1
Ansix Auto FT86Club Official Vendor Join Date: Oct 2022 Drives: 2023 BRZ Location: Canada Posts: 64 Thanks: 5 Thanked 77 Times in 34 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Ansix Auto FA24 BRZ/GR86 Accusump Oil Pressure Drop Testing Results We've uploaded a video showing our results from testing a 2qt Accusump on our 2023 Subaru BRZ Track car. Please feel free to comment on YouTube or post here if you have any questions. __________________ Check out our GR86 and BRZ products! https://ansixauto.com/subaru/

09-01-2023, 06:03 PM	#3
Ansix Auto FT86Club Official Vendor Join Date: Oct 2022 Drives: 2023 BRZ Location: Canada Posts: 64 Thanks: 5 Thanked 77 Times in 34 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	The pressure drops were from the cornering. The lower overall pressure was due to the JR radiator and oil cooler combo. The instructions suggest to install it along with the stock heat exchanger. We removed the stock heat exchanger to offset the additional resistance caused by the JR cooler. As mentioned in the video, the JR cooler makes your oil pressure around 30psi lower vs without. Removing the stock HX recovers about 10psi. __________________ Check out our GR86 and BRZ products! https://ansixauto.com/subaru/

09-01-2023, 07:04 PM	#4
Ultramaroon totaled Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,219 Thanks: 52,742 Thanked 36,989 Times in 19,190 Posts Mentioned: 1112 Post(s) Tagged: 9 Thread(s)	Thanks very much for so effectively testing and reporting your results. @blsfrs, did you see this? Starvation issues aside, it looks like your experience with the JR radiator is not unique. I'm more disappointed than surprised. Caveat emptor. __________________ service manuals

09-01-2023, 08:27 PM	#7
Ansix Auto FT86Club Official Vendor Join Date: Oct 2022 Drives: 2023 BRZ Location: Canada Posts: 64 Thanks: 5 Thanked 77 Times in 34 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Yes it does, but the 10psi is done at 95C oil temp. The difference will be smaller at higher oil temps / lower oil viscosities. You're right about the dedicated cooler, that's what we mention in our recommendations in the video. BioRebel, check out this post about the JR radiator / cooler combo. https://www.ft86club.com/forums/show...&postcount=346 __________________ Check out our GR86 and BRZ products!* https://ansixauto.com/subaru/

09-01-2023, 10:56 PM	#9
Ansix Auto FT86Club Official Vendor Join Date: Oct 2022 Drives: 2023 BRZ Location: Canada Posts: 64 Thanks: 5 Thanked 77 Times in 34 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Absolutely you can. __________________ Check out our GR86 and BRZ products! https://ansixauto.com/subaru/

09-01-2023, 03:53 PM	#2
BioRebel Senior Member Join Date: May 2022 Drives: Mini Cooper S Location: Somewhere Posts: 111 Thanks: 50 Thanked 35 Times in 22 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	You mention seeing a drop due to the JR dual radiator being paired with the OEM exchanger. But I'm not sure you specified what the drop looked like. Was it just a lower overall pressure? Or were the dips worse (longer and lower)?

09-01-2023, 10:46 PM	#8
toyota_86 Member Join Date: Jan 2013 Drives: Toyota 86 (old) / GR86 - (current) Location: Melbourne - Australia Posts: 17 Thanks: 0 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Can you take off the heat exchanger carefully so it can be replaced and look like it hasn't been touched if failure happens?

09-02-2023, 12:53 AM	#11
Ansix Auto FT86Club Official Vendor Join Date: Oct 2022 Drives: 2023 BRZ Location: Canada Posts: 64 Thanks: 5 Thanked 77 Times in 34 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Where did that price come from? Just use a good oil and the accusump with install kit is $600. You can skip the baffle. It’s up to you if you want an oil cooler. __________________ Check out our GR86 and BRZ products! https://ansixauto.com/subaru/

09-02-2023, 01:35 PM	#13
Ansix Auto FT86Club Official Vendor Join Date: Oct 2022 Drives: 2023 BRZ Location: Canada Posts: 64 Thanks: 5 Thanked 77 Times in 34 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Thats the data we collected. We have no reason to make it up. I’ve posted the deltas on the other forum. Feel free to disregard it. We’re not the only ones that have documented this. https://www.*******/threads/vincen...23/post-150985 __________________ Check out our GR86 and BRZ products!** https://ansixauto.com/subaru/

09-03-2023, 03:19 AM	#14
OldBiker Member Join Date: Mar 2023 Drives: 2023 Gray BRZ Location: SoCal Posts: 86 Thanks: 75 Thanked 92 Times in 45 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Any theories as to what is causing the pressure drop? The pickup is starved of oil, the pump loses prime, etc? If so, where is the oil during the right turn? PS: Nice video and thanks for doing the work.

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