Hey people. I have a question, us Californians don't have the luxury of 91+ octane. But my main question is, isn't the higher the octane the more power you will see? Because i look up a few places that sell 100 octane unleaded. I was thinking of mixing 5 gals of 91 and 5 gals of 100 to boost the octane level a little bit. I spoke to my tuner and he said my truck will advance the timing just a little to utilize the higher octane. but not enough for pure 100 octane.

any thoughts?

 

You speed demon

Why though? It couldnt add all that much more power.

Id keep the engine running strong, make it last, stick with what the tune is meant for.

 

well if i can knock off 2 tenths or what ever off my 0-60, 1/8 or 1/4. is worth it... see im thinking by mixing it i can get like a 95 octane.. and you know a 93 octane tune is better then a 91 octane tune.. so go figure!

 

i would say the differnce between a tune for 95 octane vs 91 won't yield 2 ths in the 1/4,make sure you use quality 91 octane fuels -not cheap no name stuff-those fuels usually have lower btu content -phil

 

You shouldn't rely on KS1 & KS2 to add timing.

 

My buddy has a little Honda that he buys 100+ octane for.

Maybe VMP or Troyer can write a tune for that octance level. We won't know until you call, ask, and then post the results for the rest of us.

Yeah, it sucks only getting 91 octane out here in California. Our gas is even mixed with about 6% ethanol. Well, we don't get 93 or 95, but then again, we don't have that crappy winter blend either.

 

mike troyer can write a max performance 1/4 mile tune for higher octane-seen them before-phil

 

You can... It isn't hard adding spark to a borderline knock table...

 

A couple things to think about...

Higher octane fuel burn slower, which is why they don't detonate. The only reason to use stuff like 100 octane is in high compression or forced induction engines. You can't add enough timing in a normal, naturally aspirated engine to warrant the use of anything over about 93 or 94 octane. Timing gets to a point of dminishing returns very quickly.

The other thing is that since high octane fuels burn slower, they ideally are not recommended for winter use. I have personally run vehicles on the dyno in the winter time that ran better on 85 then they did with 91. The slower burn of high octane fuel plus the cold climate was killing the power output as much as 10%. And winter blended fuels are even worse.

Bill