Mally69
Well-Known Member
Well its def a better fuel or they wouldnt use it in an airplane. Secondly, i run it full concentration i dont mix anything because when u mix it then tune ur engine its tuned for that tank of fuel. Next fill up its going to change unless u have the EXACT ratio again and that's hard to do or not going to happen. I never understood why these guys mix it because they damn near never get the same exact ratio. Also my dist is locked out so i dont have an ignition curve, so with that being said I've i put the fuel in i turn the distributer to where it runs the smoothest and bolt it down and leave it. U manipulate the burn by advancing or retarding the timing. To be honest, i leave the timing light on the shelf because once i advance the distributer to where it runs the smoothest, last time i checked it with a light it was 40° advance or slightly more in ( my specific engine). I run about 10.5 - 10.8 static compression with alum heads. That fuel burns slower an colder so that's why it takes more advance. Every engine will be different. But mixing it. I just don't understand because you'll never get that ratio perfect next fill up unless u like retuning with each tank.I may be misinterpreting the OP, but I think he's saying his car runs fine on his 95 (probably the same as our 91, just rated differently) but he's worried about the valves and seats, from unleaded fuel.
We basically told him that a gallon or two 100LL in a tank is plenty to save his valves, IF he can get it.