Quote:
Originally Posted by Ed Wright
And, most of it is crap anymore. My 454" Suburban has started to get a little spark knock on 87 octane pulling the trailer this past year. Either go to 89 octane, or de-tune it some. I dyno tuned it on 87 octane in 2009. Been fine until this last summer. Had some customers with premium fuel vehicles (Corvettes, etc) starting to hear their's ping some on 91. Hard to find 93 octane around here anymore.
If you have a Pure Stocker, NHRA rules should be no issue anyway. :-)
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Ed, agree that pump gas is p*** these days. However, is there a chance carbon is building up? Years ago, I put a head gasket on my wife's Cavalier. (Cars w/aluminum heads and iron blocks should come with head gaskets in the glove compartment...) It had been pinging on 87. There was a huge amount of carbon on the valve heads. Cleaned it off. Never pinged again.
Sorry for the hijack.
Dan, as I remember, years ago guys were putting various forms of rocket fuel (Hydrazine? I don't remember.) in their gas. Fuel check stopped that. Pump gas got caught up in the fray. I knew a guy with a 273 2 bbl U/SA car (Mike Smith rip) who ran pump gas until then. Race gas increased his racing budget about 50%. lol But that's another story...