What's the highest octain fule u can use in a stock boss 302 or stock laguna seca ? Is 103 safe ? Also would it give it any more hp !?!
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steveespo said:Any leaded fuel above 91 octane is safe, but depending on the tune, and ambient temperature too much octane may hurt power a little. I have my car tuned to use 93 Octane, when at track I mix in 25% 100 Octane Sunoco 260GT unleaded to give a boost up to 95 just for a safety margin at high RPM. You can get tunes that add more timing and lean it out a little that would call for the higher 100-103 Octane. Unless you are doing that or running super or turbo charger don't waste your money. At $10 a gallon and 6 mpg on track it gets expensive fast. My thought is the stock Ford strategy stops adding timing at a level where 93 Octane is the safe zone, Track Key does do timing increase on the bottom end to boost torque but even that is supposed to be safe at 91 Octane. If any others have more in depth info please chime in.
I don't think it makes more power but it should pull timing less often. I've used 100 at the track and didn't notice any difference and still threw codes. My dealer contacted Ford about my codes. Ford wanted to know if I was using race gas and recommended that I NOT use the 100 which made no sense to me. It was originally reported that TK would adjust for higher octane but I've never seen that confirmed.seca954 said:I'd like to hear opinions on this. I am under the impression that the computer learns how to make more power when octane is added.
Ford PR said a lot of cool things about track key- CARB made them change their mind :'( the concept is awesome but truly letting the engines perform to their max requires removing emissions equipment and programming that makes the cars non compliant and also endangers the catalytic converters which have to be warrantied for 8 years/80000 miles per Federal Laws. Ford doesn't want to have replace parts after sanctioning their damage with an all out tune. That's also why "racing events" void warranties, theoretically the cars can be operated at 7450 rpm continuously and still be warrantied, of course that is on public roads, so you have to drive around town in 1st gear and on the highway in 2nd to do so.NFSBOSS said:I don't think it makes more power but it should pull timing less often. I've used 100 at the track and didn't notice any difference and still threw codes. My dealer contacted Ford about my codes. Ford wanted to know if I was using race gas and recommended that I NOT use the 100 which made no sense to me. It was originally reported that TK would adjust for higher octane but I've never seen that confirmed.
Colecree said:No way to dyno for me so I Gus I have to go to the strip with 94 octain run about 6 or 7 passes then put 4 or5 gallons of VP 103 race fule ... Well c what happends
Keavdog said:Higher octane has the resistance to detonation. Unless you are advancing your timing there's no perc to paying more.