89 vs 93 tune

[ktmhans]

As the title says, i currently have a 89 oct tune. Truck runs well but the tune didnt help mpg at all. Even when i grandma it. I do have to get another data log sent back to justin for some touching up but

Does any one have any input on a 89 vs 93 difference. Power/torque/seat of pants, mpg. Anything. The extra $.10 wont kill me i dont think.

Thanks
Hans

[blueflamed03]

more timimg=more power...I run 93 tune daily. :D

[ktmhans]

Thanks blueflamed did you ever try the 89 tune or jump right to the 93. I was just wondering you can really tell the difference. And is the difference only on top end?

[JennaBear]

Octane is a big factor, but even more so, is GOOD quality! Time and time again, we see logs from customers using poor quality gas, and it makes a huge negative impact on HP and MPGs.

[plush]

I'll be going 93. It is what I use. Of course my wife filled up the other day with regular. ;(

[DTAILS]

When I had the tune installed I had been using the 87 octane and had horrible mileage (360 to the tank), but when I started using the 89 mid grade the mileage improved to nearly 100 miles more per tank. This is highway use.

Improvement of 75-100 miles per tank in city driving & pulling a trailer 75% of the time.

[My01yuk]

When I had the tune installed I had been using the 87 octane and had horrible mileage (360 to the tank), but when I started using the 89 mid grade the mileage improved to nearly 100 miles more per tank. This is highway use.

Improvement of 75-100 miles per tank in city driving & pulling a trailer 75% of the time.

I use 87 right now as well and think i'm going to go with 89 going forward. I had mine tuned for 87 but was told by Justin i could go with 93 without pinging but if I did 93 and used 87 there would be pinging.

[Nickleahy23]

When I had the tune installed I had been using the 87 octane and had horrible mileage (360 to the tank), but when I started using the 89 mid grade the mileage improved to nearly 100 miles more per tank. This is highway use.

Improvement of 75-100 miles per tank in city driving & pulling a trailer 75% of the time.

haha 360 to a tank is horrible? Thats the most ive ever gotten on the highway..$40 just got me about 100 miles...

btw I have a 93 tune and I love it..never did a 87

[DTAILS]

I was told that going to 91/93 octane would be a waste as the performance would not increase.

[ktmhans]

So you have the 87 tune and run 89 fuel. .hmmmm


I was told that going to 91/93 octane would be a waste as the performance would not increase.

[DTAILS]

Tried some of the "cheaper" 89 and was pinging right around the 1/2 tank mark ..

My tune was also installed wanting to get the most torque and higher shifting points since I pull a trailer more than not. Not sure if there is any direct impact to the mileage or octane rating. The Corvette servo definitely takes advantage of the tune as well.

[plush]

I was told that going to 91/93 octane would be a waste as the performance would not increase.


I just had my BB tune this weekend. I asked Justin about this. He said the difference from 87 to 93 would be about 30 hp, before the tune. I was like WOW! I'm not sure what I am pulling right now after the tune, but I can REALLY tell the difference.

[DTAILS]

I believe we all pick up the same amount of horsepower as I was told the same at install without going to the 93. Either way, it's one of the very best investments I've made for the Tahoe.

[swtz71]

so if I got an 87 tune and used 89 octane would I have an increase in performance?

[DTAILS]

That's a question to ask Justin as driving styles and any engine performance enhancements all contribute to the overall performance if the tune.

---------- Post added at 07:43 PM ---------- Previous post was at 07:40 PM ----------

In my case higher octane does absolutely nothing for me performance wise & the biggest improvement going to the 89 was the jump in overall mileage increase.

[swtz71]

I'm wondering if my next fill up I should try to use the 89 and see if I get better performance and mpg..
I just don't want to screw up something.

[DTAILS]

It isn't going to screw up anything. The tune will either take advantage of the increased octane or it won't. You really should run any questions by Justin as I'm speaking from my own experiences. Then again, our engine mods are almost identical.

[swtz71]

this is true.
I thank you for your input on this.
I like your truck set up it makes me think about upgrading to a nnbs and setting it up like that..

[ktmhans]

has anyone with autocal gotten justin to make the 87 tune and 93 tune and compaired them? I'll run it by justin too. I really just don't want to ask him to do extra work if its not worth it.
It makes sense mpg wise to to the 87 tune and run 89. but I can't see how the engine could generate as much power with a an 87 tune as with a 93. But some how reality doesnt' always make sense.
Thanks for all the info.

I did do the vette servo as well as a cai. On a side note. justin had told me my maf was reading off. I bit the bullet and grabbed one at advanced auto, and wow I can't believe how different the truck runs. Mpg seams alittle better but more is the fact that the transmission really shifts better and exceleration and long pulls are just smoother. never would have thought that a sensor could make that much difference.

[DTAILS]

has anyone with autocal gotten justin to make the 87 tune and 93 tune and compaired them? I'll run it by justin too. I really just don't want to ask him to do extra work if its not worth it.
It makes sense mpg wise to to the 87 tune and run 89. but I can't see how the engine could generate as much power with a an 87 tune as with a 93. But some how reality doesnt' always make sense.
Thanks for all the info.

I did do the vette servo as well as a cai. On a side note. justin had told me my maf was reading off. I bit the bullet and grabbed one at advanced auto, and wow I can't believe how different the truck runs. Mpg seams alittle better but more is the fact that the transmission really shifts better and exceleration and long pulls are just smoother. never would have thought that a sensor could make that much difference.

I appreciate that and anytime with the info. ;-)

I initially lowered it to make trailer towing a little more comfortable ... like it for other reasons now