I'm new to 7's I have a 91 n/a.

what does it mean when y'all say "tuned" to 87 pump gas?

I run 89, and i get better gas millage or it seems.

 

Tuned to 87 octane fuel has to do with the complexities of the way the computer runs the car. There are many things that go into this, including timing, a/r ratio, compression ratio, ect. For a stock n/a, you really don't have to worry about these things.

There is nothing in the tune of an rx7 that adjusts the fuel injection based on the percieved octane of the fuel; meaning that you actually do not get better mileage using higher octane fuel. Keep in mind that there are many things that factor into fuel mileage, including driving style, hwy vs. city, and even weather, so these could factor in when you were looking at your mileage.

 

is there anything other then antifreeze I need to do for the winter?

I moved to Pa from Ga over the summer, This will be the first time she has seen a real winter Snow, below 0, stuff I didn't see in Savannah Ga.

 

Let the car warm up fully before you tern the car off, and wash it all the time to get the salt of your car or it will be a rust bucket.

 

buy another car for the winter, just some POS. If you value your car I wouldn't drive it in the snow.

 

is there anything needs to be done b4 I park she... wow that will be tuff

 

Yah, like I said in another thread, you don't need to run 89 or 91 in your car. You won't get better gas mileage or more power.

 

http://aaroncake.net/RX-7/storage.htm

 

she has less then a 1/4 tank now. i will fill up with the cheap stuff..

Turbo II Rotor thank you, that will help a lot

if I do store her, the 1.3 will get a rebuild, 170+ on her.

 

Did you put all the miles on the engine? I would do a compression test before a rebuild, you never know it might have been rebuilt.

 

ture, what is the "needs" to be rebuild compression? (lack of better words)

 

This forum does have a search function.

 

your mean...

I'll search...

ty

 

You would be wasting your money.

The octane rating of gas is the resistance to pre-detonation. So higher the octane, the less likely that when the gas is compressed it explodes without a spark.

Octane has absolutely nothing to do with how much power a gallon of gas can provide.

And you wouldn't get any better gas mileage, as again, the BTU (power output) of 86 octane is the same as 89 or 92 octane.

The only cars that would see additional power are cars that are tuned to run higher octanes with higher compression or forced induction or radically advanced timing. These cars need the higher resistance to detonation (higher octane) to prevent either the timing being retarded due to the knock sensor (if equipped- and non turbo FCs are not), or prevent engine damage (pre-ignition or detonation will destroy a rotary engine very very very quickly- in the case of some mis tuned turbo rotary's, two or three pre-ignition events are all is needed to crack and break the apex seals).

Also because of the bathtub combustion chamber found on rotary engines, the lowest octane you can run will provide you with the most power. On a reasonably stock FC that is 86 or 87 octane.

Again the mis-conception that you might be getting more power from higher octanes or better burn is actually the opposite of what is happening.

Another draw back is that higher octane may not completely burn and you end up dumping more down the tail pipe as well as coating the rotor faces with soot (since typically mid and high grade gasoline also have higher additive packages as to give the consumer the concept a more expensive grade is a better grade).

 

thats the concave on the rotor.

I was going to send it off to rebuild if I store her this winter..

I think I'm going to do it myself, I might stop asking all the dumb questions.

once more Thank you Icemark