So I just ordered my Diablo Intune and should be here in a few days. The premium fuel in my area is 92 octane, so I was wondering which would be the better tune for me to run the 91 or 93? Thanks in advance!
Due to refinery gasoline blending practices, many times the 92 Octane gasoline will actually turn out to be closer to 93. We call it give away, it is often an insurance policy against the alternative. Being below 92 - we call that breaking the law.
The E10 requirements seem to have increased the give away from many refineries since Ethanol is an octane booster that is often added later, not during the actual primary blend process, so is harder to accurately account for.
So you could conceivably run a 93 tune on so called 92 gasoline with no problems, but you could never guarantee the octane in the gasoline was 93, many times it will be though. It depends upon the refinery it came from (some are able to blend closer to the specs than others).
The other thing to consider is that even if the gasoline left the refinery closer to 93, if it sits in the tanks for a while (as premium gas can do at some gas stations) it may start to degrade it's octane number. Butane for example gives a good octane boost, but it is also one of the first products to evaporate off and bleed out through any pressure relieving system in the storage tanks.
So no clear answer from me, but just something to consider.
While perusing some recent data logs for any KR that might need addressing, and after finding way more than I thought I would/should find, I did some critical thinking on why this KR continues to show up when, for all intents and purposes, it should not be there.
And gentlemen, I have come to...
I purchased an unlocked PCM a few years back for my 2015 SPS. At the time of purchase they company asked for my mileage and VIN for the PCM. The PCM was never installed. It never made it out of the box. Will the PCM need to be reflashed if I were to sell it for it to work for someone else? I was...
Creating this post so newbies understand what it costs up front to go down the path of DIY tuning.
I don't consider Diablo DIY because you are very limited in the parameters you can change. Does not mean I don't like Diablo tuners...they are great but to me they are for a different use case...
as all these, I'm sure poer and driving smoothness is not maximized.
what is offered to tune this new car?
cracked PCM / tuner?
can johan then do emal tunes?
do the 8 speeds get ability to tune through PCM/ OBD port, unlike older years which the TCM has o be sent out for shifting changes?