89 Gas on 87 Tune

[coolio4433]

So the gas station closest to my house has 89 for the same price as 87 always. Am I correct to assume that I could see even better performance with an 87 tune by using 89 and bumping the timing up 1.0 like folks have done with 91/93?

[88Racing]

Originally Posted by coolio4433

So the gas station closest to my house has 89 for the same price as 87 always. Am I correct to assume that I could see even better performance with an 87 tune by using 89 and bumping the timing up 1.0 like folks have done with 91/93?

Is everything E10 up there?

Lars

[coolio4433]

Originally Posted by 88Racing

Is everything E10 up there?

Lars

Sadly yes

[Longshot270]

Everything is 10% ethanol? I thought it was supposed to be hard on the rubber parts. Or is that just the E85?

[coolio4433]

Originally Posted by longshot270

Everything is 10% ethanol? I thought it was supposed to be hard on the rubber parts. Or is that just the E85?

Supposedly up to 10% or so doesn't cause harm to anything. Based on that assumption lots of states in the upper midwest have adopted the E10 fuel as the standard. (mostly as a subsidy to the farmers and ethanol plants in the area)

I do like that premium fuel in WI is still 100% gas. My car gets 2-3 MPG better on that stuff than the crap I get in MN here.

[Longshot270]

In central texas you have to drive at least 40 miles to find a station that sells ethanol, and when you do it is only E85. So I've never run it, almost borrowed a gallon of a friend's jet fuel though. He'd go buy about 5 or 10 gallons at a time as an octane booster for his truck...on top of the 93 that he always ran. lol

[Longshot270]

It would work, not sure about mileage or anything. I noticed a little more kick on the upper end of the power band when I would try it. Even before the programmer.

[Down N Dirty]

Originally Posted by coolio4433

So the gas station closest to my house has 89 for the same price as 87 always. Am I correct to assume that I could see even better performance with an 87 tune by using 89 and bumping the timing up 1.0 like folks have done with 91/93?

My guess is if 89 is the same price as 87, then 89 is E-10, and 87 is straight gasoline.

PS, sorry we hijacked your thread with gambling shenanigans.

[coolio4433]

Originally Posted by Down N Dirty

My guess is if 89 is the same price as 87, then 89 is E-10, and 87 is straight gasoline.

PS, sorry we hijacked your thread with gambling shenanigans.

No problem. I guess I'll just have to experiment a bit and see how it goes.

[Longshot270]

Maybe try what I mentioned earlier, increase timing .25 for every octane over normal then keep raising it until you think your close enough to the limit.