Video shows that octane doesn't make power.

a word to the wise, i would delete this post asap.
I got banned for posting the same pic.

 

Total timing = base + advance. I don't know why they would use that term unless that is what they meant. They also said further advance didn't yield any more torque so any adjustments the engine would have made would be retard, which don't increase torque unless you are already past MBT. It sounds like you are trying to say that a production LS3 from GM, with the GM EFI system, would also not benefit from fuel with an octane rating over 87. I know that is false.

 

If it doesn’t knock on 87 then why bother going higher? If I had a boosted or higher compression engine that required it to prevent preignition (knocking) then I’d buy it. I don’t so I won’t. My mileage is great on regular and performance isn’t an issue.

 

It won't knock on 85 either, so why not use that?

 

I've run 85 since delivery, no knocking whatsoever. (In colorado though )

 

But…you just did it again, guilty by associating.

 

lol, i dont think that counts.

 

That's what they set it to. It doesn't mean the engine management system doesn't adjust after the fact based on all the inputs. It's the base map.... They attempted more timing, but it produced no additional power.

The whole point is that octane does not equal more power. It completely depends on if the engine build can take advantage of the octane being used.

As it applies 2GR-FKS, I know that aftermarket tunes take advantage of it and why they had octane specific tunes. The stock tune? Does anyone have dyno sheets showing the increase in power?

 

I don't think anyone is going to pay for Dyno time to test different fuels, so probably not. If timing advance increases, torque increases at that rpm/load up until MBT timing is achieved. The 2GR ECU will advance timing whenever possible to do so without knock. Higher octane rating allows for more ignition timing advance.

 

Won’t most engines detune with lower octane? I could wrong about that.

I agree that an engine that doesn’t knock on 87 octane doesn’t gain anything with higher octane fuel.

 

I posted the dollar amount to gas pumped. I didn't even see the Biden sticker really. Lol. If they want to ban me they can. I could care less about the sticker.

 

I like to run regular. The unleaded is to harsh for my delicate system. Hard to find though. Anyone remember regular.

Went in my 2stroke. (NOT sexual.)

 

Surely you jest …..

 

Modern engines will, but an engine built to run on higher octane may not be able to detune to compensate. At some point, there is too much compression for low octane fuel.

 

It’s not readily available or I might. My truck is my livelihood, those pennies saved are a huge chunk of overhead and a major factor behind the decision to get the I4 and it’s mileage. It’s regular maintenance using the correct fuel and not driving like a banshee that will protect it.

 

It works both ways. with higher ocaten rated fuel it will increase timing advance until it senses knock, then back off, repeat. It's always doing this to max efficiency/power for the fuel and environmental conditions. Every modern EFI engine does this. This is the whole point of my posting here. Put in 93, it will take advantage of it. put in 85, it will reduce timing and run just fine. Obviously there are limits of how much the system can advance or retard timing, and running 85 on a 102* day at sea level is probably not wise.

 

what I seen best for me is 92 octane at sea level between 70°F to 75°F . Truck runs great at these conditions. I'm tuned also

 

No, the truck prefers high-test “on the rocks”.

 

What do you guys think about running no ethanol gas there is a Gas station like 10 minutes away from me that sells ethanol free gas would it be worth buying is it better for the truck, in the long run, I have a 2002 Tacoma v6 3.4.

 

EFI engines don’t care. Non ethanol will not degrade as fast and give better mileage, albeit at likely higher cost. So do the math and decide for yourself.