i'm building a 10.74:1 548" motor to run on the edge of 93 octane

with tight quench [.040] and a good sized roller i would expect to have no problems

iv'e heard some talk about 91 octane being the best available soon

will true 93 octane be avail???

thanx

I know Sunoco here in CT still has 93 octane. They used to have 94, but axed that a few months ago. Most stations in my area still have 93 though. Do you run alum. heads? If so, with a big enough roller, you might even be good on 91.

orange,the heads are aluminum,i'm just hoping 93 stays around for added protection

Haven't heard of that but my 10.9-1 540 consumed 93 also so we are in the same boat...what kinda numbers are you looking for?

91 is the highest in southern ca :(

Why would they not carry 93 anymore and just run 91?

Opposite here, we have 87, 89, and 93...hardly anywhere has 91.

Well, it's changing. And will continue to change. The local availability and overall availability of premium (93/94) octane fuel. Overshot my 8.3 dcr target and now at the ragged edge of 8.6 and worries about 93/94 availability. Motor would run hot retarded back.

Sunoco station down the road is 93 now, not 94. :( Picked up one bad batch of Mobile 93 and I DID NOT like what I heard.

We ( WNY) dont have 91 either , 87, 89 93 is typical.

You can get 93 at all pumps in NJ, DE, PA, and MD. Sunoco also carries 94 at the pumps. There are also certain Sunoco stations that have 98.

93 still available in CT..no more Ultra 94 though graemlins/sad.gif

I wonder why they canned the Ultra Chris, was it the 10% ethanol that made it 94 instead of 93? I have to check the pump and see if the 10% ethanol sticker is still next to the 93.

All our stations here in MD have 87 89 and 93 octane, there isn't a Sunoco nearby but I'm told that it has 94 octane. Both my Chevelle and Camaro run fine on the 93 but when I finally get my big block in my Chevelle it might be different but that is easily a few years down the road. graemlins/sad.gif

Blue where is NJ is there 98 at a station?

i heard on a different forum about gas ppl use. one guy had mentioned he got his gas from the airport, but you can only buy it and put it into a gas container they wont fill a car heheh. sayd the stuff is 104 octane

I used to fuel planes some years ago. Avgas comes in several octane ratings I used to use 100LL (low lead). My car ran great. I usually mixed it 50/50 with the gas.

Originally posted by doggy69:
Blue where is NJ is there 98 at a station? There is a Texaco Station on RT 206 in Indian Mills that has it. I stopped there to get some last summer. There is also a Sunoco station in the town of North East, MD that sells 98.