Octane

[Tom Goldman]

Steve, I've recently done some track testing of different fuels ,including Sunoco Maximal. .........I had a very difficult time with the Maximal finding jetting and timing that produced consistant runs. ...Several of my friends who either switched to Maximal or had been running it for a while experianced similar results....I suspect the burn rate of the Maximal may be to slow for your combination ..........My main engine is a 565BBC with 15.7 to1 compression. So far after testing with Sunoco Maximal, Sunoco Supreme ,VPc15 and c14 , the c14 has produced the most power and the most consistant runs. ..........I also have a 468BBC with 15 to1 compression ,and have found it runs best on Sunoco Supreme ,or VP c12 .......Unless you are running at very high altitudes,I'd try the Supreme in the car, if Sunoco is the available fuel in your area ,At 14 to 1you should be safe........I'd be comfortable running VP c12 in a combination like yours. ......Tom