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Old 07-22-2020, 12:06 PM   #3753
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Originally Posted by BR-ZED View Post
That might explain it then.... this was middle of the band, around 4k. Will have to check my logs when i get home to see what it looks like at higher rpm.

Toast, was that on the stock pulley? 11 is a lot bigger than 9...
my bar per logs is .7 over 1 bar at 7300 rpm = 10 psi

my bar at idle averages .30 to .25 .. I'm just gonna call it .7 below standard atmospheric press.. -10 psi at idle below so that's a vacuum

Idle log below .. I'm not able to use datazap on current comp so that link may or may not work

https://datazap.me/u/scdata2?log=0&data=30
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Old 07-22-2020, 03:27 PM   #3754
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Hey All!

I've been a member of this thread since it popped up in 2015. I bought a BRZ limited back in 2013, and purchased the Edelbrock in February 2016. My car has been mostly garage parked for the last two years due to work, and now I'm finally getting it back in running shape. I just had the recall work done last month, and I've put about 500 miles on the engine. I've re-read the entire thread and I can't thank you all enough for the valuable information you've shared here.

After reading through, I have flagged these as the needed fixes/updates:
- v2 Coolant Surge Tank
- Upgraded bypass actuator kit
- Update Delicious Tune (currently on v21)
- Dbox firmware update potentially (purchased when first released)

Is there anything I have missed?

Last edited by Silverfox; 07-22-2020 at 06:30 PM.
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Old 07-22-2020, 07:49 PM   #3755
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Looks like that covers it.. I don't know how they update the firmware or if that is necessary on the Dbox, call DT on that one and see if it's necessary.
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Old 07-22-2020, 08:47 PM   #3756
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Originally Posted by toast View Post
Where in the rpm range are you measuring 6 psi of boost? At 7k I hit a little over 11psi.

Most people misunderstand how boost is created by a roots blower. It generates constant boost only in an open system. Once you attach it to an engine you get linear boost with rpm.

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https://www.ft86club.com/forums/show...postcount=3357
Count me as one of the ones amongst the uneducated... I did not realize it grew linearly w/ RPM. It is misleading because when you get on the throttle the boost jumps way up, so it is hard to not think it is full boost... it definitely grows w/ RPM but does so subtly. I should have reviewed my logs instead of just going with a few datapoints i mentally grabbed off my ECU Connect dashboard.

It would be really nice if ECU Connect let you review logs in the tool. Anyone have any good tools for reviewing logs directly on your android? I also cannot find the files so have to resort to using the "share" option inside the app which is a little annoying.

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Originally Posted by AKITA View Post
my bar per logs is .7 over 1 bar at 7300 rpm = 10 psi

my bar at idle averages .30 to .25 .. I'm just gonna call it .7 below standard atmospheric press.. -10 psi at idle below so that's a vacuum

Idle log below .. I'm not able to use datazap on current comp so that link may or may not work

https://datazap.me/u/scdata2?log=0&data=30
Yeah that log link doesn't work... it just takes me to my datazap home page. But you will see our numbers are in line w/ each other.

The way my logs are set up makes it seem they are logged directly to PSI, which is nice I don't have to do the conversions...

First log I see
off throttle ~3 psi
idle ~5 psi
full throttle ~7400 rpm 24.3 psi
atmosphere 14.8 psi

So yeah I am at about 9.5 psi of boost, cool.
https://datazap.me/u/br-zed/sc-log-3...5-35&solo=7-35

In another log (not posted) I seem to be idling around 1000 rpm (seems a little high) at 5.6 psi. Probabyl would drop w/ a lower idle.

In this log I again see good numbers
https://datazap.me/u/br-zed/sc-log-4...g=0&data=15-35
24.9 psi @ 7388 rpm
25.4 psi @ 7204 rpm
24.7 psi @ 7348 rpm
25.1 psi @ 7356 rpm
atmosphere 14.74 psi, so boost is 10.16 psi, 10.66 psi, 9.96 psi, 10.36 psi.

So it looks like our cars are right in line w/ each other.

So I guess I am not worried as much. The supercharger is louder than you all describe (that doesn't bother me assuming there is no defect) but it appears to be working properly so that is a good sign. And I assume there are no vacuum leaks or boost leaks since it is hitting all the numbers listed above. It drives really well.

Hopefully Edelbrock will get back to me on this pulley. Doing a SC install during COVID sucks, they have a skeleton crew so everything is taking longer. But as for now the car will be garaged until I get a new pulley...

Last edited by BR-ZED; 07-22-2020 at 08:59 PM.
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Old 07-22-2020, 09:41 PM   #3757
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Originally Posted by BR-ZED View Post



In another log (not posted) I seem to be idling around 1000 rpm (seems a little high) at 5.6 psi. Probabyl would drop w/ a lower idle.

In this log I again see good numbers
https://datazap.me/u/br-zed/sc-log-4...g=0&data=15-35
24.9 psi @ 7388 rpm
25.4 psi @ 7204 rpm
24.7 psi @ 7348 rpm
25.1 psi @ 7356 rpm
atmosphere 14.74 psi, so boost is 10.16 psi, 10.66 psi, 9.96 psi, 10.36 psi.

So it looks like our cars are right in line w/ each other.

So I guess I am not worried as much. The supercharger is louder than you all describe (that doesn't bother me assuming there is no defect) but it appears to be working properly so that is a good sign. And I assume there are no vacuum leaks or boost leaks since it is hitting all the numbers listed above. It drives really well.

Hopefully Edelbrock will get back to me on this pulley. Doing a SC install during COVID sucks, they have a skeleton crew so everything is taking longer. But as for now the car will be garaged until I get a new pulley...
I think there was just a little conversion/communication error since you say your logging reports direct psi.. so 14.7 - 5.6 = -9.1 vacuum which is very close to mine I idle.. I also idle at 900-950 not quite 1000 ... I'll repost that link but don't think I need to.. and look over the ones you posted.. but yeah that sounds better

29.50 idle
https://datazap.me/u/akita/scdata2?log=0&data=30

29.54 final WOT
https://datazap.me/u/akita/sc-6th-da...1&zoom=112-274

Last edited by AKITA; 07-22-2020 at 10:57 PM.
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Old 07-22-2020, 10:53 PM   #3758
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Originally Posted by CSG Mike View Post
No need for the dbox with current tuning techniques.
Could you elaborate on this statement? Currently shopping around for a tune or just going with an update to my current Delicious Tune and Dbox. I trust your guys' word considering I bought all my mods from you.
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Old 07-22-2020, 11:08 PM   #3759
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Could you elaborate on this statement? Currently shopping around for a tune or just going with an update to my current Delicious Tune and Dbox. I trust your guys' word considering I bought all my mods from you.
Kind of curious myself now, as if you check my above logs.. in final WOT.. I've got a MAP voltage flutter between 6-7k.. and I got a brand new Dbox setup with DT tune.. you have to wonder what that would look like without.. would it? just gonna throw that out there and see what responses that gets. maybe it's nothing
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Old 07-23-2020, 12:04 AM   #3760
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Could you elaborate on this statement? Currently shopping around for a tune or just going with an update to my current Delicious Tune and Dbox. I trust your guys' word considering I bought all my mods from you.
The function of the dbox can effectively be performed by Ecutek with the current CSG Edelbrock tunes, thus eliminating the need for the dbox.
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Old 07-23-2020, 12:23 AM   #3761
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The function of the dbox can effectively be performed by Ecutek with the current CSG Edelbrock tunes, thus eliminating the need for the dbox.
Thanks for the clarification!

Follow up question (and for anyone else who can answer as well): with delicious recommending SN Plus oils to prevent LSPI, what are you guys recommending for oil these days? (Previously I ran Motul 300V 5w30)

Cheers
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Old 07-23-2020, 01:30 AM   #3762
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Thanks for the clarification!

Follow up question (and for anyone else who can answer as well): with delicious recommending SN Plus oils to prevent LSPI, what are you guys recommending for oil these days? (Previously I ran Motul 300V 5w30)

Cheers
LSPI was never an issue before to begin with
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Old 07-23-2020, 12:28 PM   #3763
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Thanks for the clarification!

Follow up question (and for anyone else who can answer as well): with delicious recommending SN Plus oils to prevent LSPI, what are you guys recommending for oil these days? (Previously I ran Motul 300V 5w30)

Cheers
I'm also in for oil recommendations for the supercharged engines - have some outstanding credit on a website and they sell the Motul oils for engine and diff and whatnot, might use up a chunk of that credit and get some
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Old 07-23-2020, 01:19 PM   #3764
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LSPI was never an issue before to begin with
Interesting, can you explain why some boosted 86's are very picky in low RPM + boost?... I'm going through remote log revisions due to low RPM, high gear IAM drop when I hit boost (pressure over ambient). Pretty much highway passing and such. I experienced it very badly with the Edelbrock ROM and the initial ROM's from Delicious. I thought it was a mechanical issue. After a few revisions we have almost eliminated it. In the process I have removed some of the mechanical variables: Replaced plugs, checked coils, cleaned/checked/new seals for the DI injectors and checked compression. The engine has 40K miles and aside from that IAM drop/knock at low RPM the car runs beautifully.
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Old 07-23-2020, 02:38 PM   #3765
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I'm looking to buy an Edelbrock kit but was wondering if any of the owners have done an e-tune with Openflash through an OFT? I know ECUTEK is better for this application, but I just don't know if I want to be locked in with ECUTEK especially with its relatively steep entry cost(Cable + License cost).

Btw I created a post asking the same thing in the software tuning section but I'm asking the same thing here just cause this is a little more specific and could probably get a faster response.

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Old 07-23-2020, 03:39 PM   #3766
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I know ECUTEK is better for this application, but I just don't know if I want to be locked in with ECUTEK especially with its relatively steep entry cost(Cable + License cost).

Thanks
Nobody will likely recommend this with some limitations that exist with OFT in this application (tuners can't protect their intellectual property). You pay $500 plus you will pay OFT another $300 to write /make another applicable tune (this is if you can get them to respond, I've never heard from them about a request I made regarding a popular FI solution OFT is used for, never heard from them) and I don't think it will be anywhere near what you can get with Ecutek. So total for tuning (which outside of solid install and sound working machine) is very important, from Ecutek 1500-1800 compared to OFT at around 800 call it an extra 1000, while you have thousands invested in the hardware installing... most will tell you OFT is not a smart route unless you know enough to do it yourself. (not even sure it would be the smartest then, most economical maybe)
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