N54 93 octane safe power levels

veer90

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Nov 16, 2016
576
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Rye, NY
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#1
Getting ready to retune my car on 93 octane, stock DI no meth. My knock sensors are desensitized on the hardware side so I can't really rely on them to pull time unless the knock is bad (built motor problems). Stock compression / stock head N54 with a built bottom end.

What's a realistic safe upper ceiling for hp? How much boost should I run to get there?

https://www.e90post.com/forums/showthread.php?t=1283955

A while back VTT put down average ~560whp STD on 93 octane with 25 psi and 4.5* on GC twins, so I think 530whp SAE would be a good place to stop. I'll try 23 psi and 3* for the base map.
 
Oct 28, 2017
758
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Monroe CT
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#2
If you have access to dyno a set of cans Is really the best way to go.
 

Torgus

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Nov 6, 2016
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Boston
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#3
A 6266 should have more headroom on pump 93 than a set of GCs I would think. Shame they don't list the Flow Rate in lb/min like most turbos.

Also, remember that very few have been able to touch that vendors #s with their products. YMMV
 
Last edited:

Torgus

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Nov 6, 2016
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Boston
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#4
Here you go: https://www.bummerboost.com/content...266-turbo-kit-makes-559-rear-wheel-horsepower

560 whp on pump 93.

Mod list:
JB4 + MHD - Tuned by EMP
Ethanol free 93 octane
Tuned on 20PSI (graph shows 21.5 but that was a boost spike)
DocRace 6266
AD-E 650HP intercooler
Fuel-it stage 2
550i clutch
MMP Port Injection with JB4 controller

I don't think you would need port injection on 93. I thought the injectors and HPFP could handle around this level with no PI. I could be wrong.


xShadows Dyno:



I'll dyno in the spring but I am hoping for 600+ whp on my 6466 + 93 pump and charegpipe 100% meth. I don't need to chase any crazy numbers. If I ever want more I can go direct port and bump it up to 700whp. But that is a lot of meth for fueling at that point.



veer90 Is this going to be your daily driver tune and then run 100% E85 for events or something?
 

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