Guest Anonymous Posted February 27, 2002 Share Posted February 27, 2002 have a 260 with an un-modified (except for SU carbs) L26 that i want to run on optimax (98% octane for you non AUS users!), what mods (if any) do i need to make? and whatabout running on regular unleaded? I'm relatively new to this game... Quote Link to comment Share on other sites More sharing options...
johnc Posted February 27, 2002 Share Posted February 27, 2002 Running a fuel with a higher octane than your engine needs actually reduces power. The higher octane doesn't burn as well so you don't get the same cylinder pressures. But, the difference in power is really only noticeable on an engine dyno. Now, if you are asking what modifications you need to make to take advantage of the higher octane fuel, well, that's a whole book in itself. I sugest you start reading some of the topics in the Turbo/Supercharger and the Datsun L6 forums. And most L6 engines will run fine on unleaded if they've had a valve job in the last 20 years. Quote Link to comment Share on other sites More sharing options...
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