N54Tech.com - International Turbo Racing Discussion
(#5926)
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dingo6610 dingo6610 is offline
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Join Date: Aug 2019
Car: 2017 Infiniti Q50 RS400
Default 04-12-2021, 11:14 AM

Quote:
Originally Posted by JCB
Yeah this log you peak out at 13.1PSI right as you cross 5k RPM. Not sure where the 14.7 you are looking for is coming from - is that advertised peak for an RS?.

Anyway, go back and look at logs from other RS models in the thread. I think you will find yours is performing normally. Now that you have JB4 you can focus on your total boost and dial that in.
Thanks. Yes, the stock turbos peak at 14.7 psi, https://www.autoguide.com/auto-news/...-turbo-v6.html
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(#5927)
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mikemike mikemike is offline
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Car: Q 50
Default 04-21-2021, 01:43 PM

Quote:
Originally Posted by Q50UK
Thanks I’ll try this.
Did this ever happen again? I had something like this happen the other day and what I noticed was my intake temp was 160..I'm in Florida so it's hot. I had removed the front intake cover because it sounds nice without it but I was obviously getting heat soaked. With the cover i do get 130/140 mostly in traffic/city driving in open road is around 95. And that limp mode seems to hit around 160.
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(#5928)
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roymacavoy22 roymacavoy22 is offline
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Car: 2016 Q50
Default Log - Yesterday, 11:24 AM

Could you please take a look and give your opinion. Thank you.

2016 q50 ldp, cbe, BM inlets,
Attached Files
File Type: csv q50.csv (19.2 KB, 4 views)
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(#5929)
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JCB JCB is offline
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Car: 2018 Q50 3.0t
Default Yesterday, 11:36 AM

Tin Cup - what gas/octane are you running. Timing drops very low on that 1st pull. Looks a little better on the 2nd one.
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(#5930)
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roymacavoy22 roymacavoy22 is offline
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Default Yesterday, 11:44 AM

Quote:
Originally Posted by JCB
Tin Cup - what gas/octane are you running. Timing drops very low on that 1st pull. Looks a little better on the 2nd one.
E30 blend.
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(#5931)
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JCB JCB is offline
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Car: 2018 Q50 3.0t
Default Yesterday, 01:04 PM

If you achieved the desired octane outcome with the E30 I think your log should look healthier than just a standard 93 octane car running these same boost levels. To me it looks a little iffy. Was expecting you to say you are on 91 octane or at best 93. My advice would have been...consider backing off a pound of boost, definitely don't add anything additional unless you can find some better fuel.

Given you are experimenting with fuel, I would START by using up what you have and put a fresh tank of good quality 93 octane (or 91 if that is all you have available) and begin logging with map 1. Log and move up if you don't see concerning drops in timing (Ign1). Repeat until you see problems in timing. THEN you would start adding a few gallons of E30 to see if you can improve from there.
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(#5932)
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roymacavoy22 roymacavoy22 is offline
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Car: 2016 Q50
Default Map 3 pull - Yesterday, 02:50 PM

Here is a pull on map 3. Better?
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File Type: csv P50_M3_R1_210422_1550.csv (10.1 KB, 3 views)
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(#5933)
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JCB JCB is offline
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Car: 2018 Q50 3.0t
Default Yesterday, 03:56 PM

Yes, that looks very healthy to me. I would try Map 4 and see how it reacts.
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