Race gas

[bigastrk]

Since I am limited to be able to buy 90 octane here in AK, I am looking at mixing race gas wth the 90. I talked to the local sled shops and they have race gas they say it is 120 octane. Is that right? I thought that the highest was 110 but I could be wrong. Would there be any adverse effects to mixing this like half and half with 90 for daily driving (other than cost). I may go down to a lower mix ratio for DD but we will see how the car reacts. I already have tunes for 93 and that is why I am wanting to make the mixture and I will also be running nitrous while at the track. Thanks.

 

[silverstang07]

Is'nt 120 octane leaded fuel?? probly wont be too nice on your fuel system. Dont hold me to that, I do not run anything higher than 93 in my car, yet.

 

[Mike@PowerHouse]

Yes there are race fuels that exceed 110 octane. 120 isn't all that common. Most fuels over 105 is leaded.
I would suggest using 105 unleaded if you were to run race gas. It will not affect your 02 sensors and give you plenty of octane. In fact you can figure if you mixxed 105 and 90 50/50 you would net fuel around 97 octane. Plus the 105 is probably cheaper than the 120.

 

[bigastrk]

The hardest part is finding anything less than what the sled and bike shops sell. The track here is only open for a few months and they don't really stock to much anyways. I guess I will go see what the airport has, as far as AV gas goes.

 

[05xgt]

Check this out www.bazellracefuels.com. It is a mixing calculator. Yes as mentioned above all over 105 will be leaded. I blend Sunoco 104 with 93 pump to achieve what I'm looking for. You can from what I have researched run leaded fuel by removing cats, removing O2 sensors [rear] plug inlets remove fronts but leave connected [plug front] by leaving O2s connected to sensors this will force the ecm to stay in open loop. To much work for me, and the gains are marginal. At least in my op.

 

[Dex]

If you are really serious you could order a 55 gallon drum of VP 109 and I believe its unleaded

 

[bigastrk]

Check this out www.bazellracefuels.com. It is a mixing calculator. Yes as mentioned above all over 105 will be leaded. I blend Sunoco 104 with 93 pump to achieve what I'm looking for. You can from what I have researched run leaded fuel by removing cats, removing O2 sensors [rear] plug inlets remove fronts but leave connected [plug front] by leaving O2s connected to sensors this will force the ecm to stay in open loop. To much work for me, and the gains are marginal. At least in my op.

Well As far as the cats and O2's are concerned I have already gotten rid of them with the long tubes and off-road h. I would just have to get the front O2's taken care of. But I see that being a pain and like you said I don't believe it would be worth it.


Oh and Dex...It would probably cost me double the initial cost of the drum along with shipping due to being in Alaska. I knew I shouldn't have moved back. LOL

 

[GT RO]

If you are really serious you could order a 55 gallon drum of VP 109 and I believe its unleaded

VP 109 is unleaded , it is also oxygenated
we used to run this fuel at the track until we went to c 16

 

[US-1]

Oh and Dex...It would probably cost me double the initial cost of the drum along with shipping due to being in Alaska. I knew I shouldn't have moved back. LOL

Wait....you mean.....you got OUT of Alaska and then RETURNED voluntarily?

 

[Nickoli]

i run turbo blue 115 in my car for my race gas tune. i also ran it for a long time on my old kb'd 95 back in the day and it seems like the o2s start to go south after 1 good season of racing. they arent cheap to replace often but hell eather are our spark plugs lol.