106 Octane Fuel. Safe?
Banned
Joined: Aug 2001
Posts: 3,505
From: looking for a flow bench so Brook and I can race
Originally posted by Mindgame
And sometimes you actually slow down with the higher octane fuel. I think alot of it has to do with having the "right" burn rate and the higher octane stuff just burns a bit slower (less volatile).
What we used to do is get about 5 gallons of 92-93 octane in the tank and take 2, 5 gallon containers of 108 with us. Make a run and get your mph (ET don't count here). Then run the car with 3 gallons of the 108 added. If the car picks up mph then you're headed in the right direction. Keep adding 3 gallons of 108 until you slow down or stagnate. Mind you that you need to keep everything very consistent from one run til the next... same coolant temps, everything as close as possible.
Of course we do this on carb motors where we'd also advance the timing. So there are some other things that play into the process but it does give you an indication of what octane the engine really wants. Sometimes the lower octane stuff burns at just the right speed for a given advance. I'm not sure of a way to determine the actual octane increase with this method though. Anyone know??
-Mindgame
And sometimes you actually slow down with the higher octane fuel. I think alot of it has to do with having the "right" burn rate and the higher octane stuff just burns a bit slower (less volatile).
What we used to do is get about 5 gallons of 92-93 octane in the tank and take 2, 5 gallon containers of 108 with us. Make a run and get your mph (ET don't count here). Then run the car with 3 gallons of the 108 added. If the car picks up mph then you're headed in the right direction. Keep adding 3 gallons of 108 until you slow down or stagnate. Mind you that you need to keep everything very consistent from one run til the next... same coolant temps, everything as close as possible.
Of course we do this on carb motors where we'd also advance the timing. So there are some other things that play into the process but it does give you an indication of what octane the engine really wants. Sometimes the lower octane stuff burns at just the right speed for a given advance. I'm not sure of a way to determine the actual octane increase with this method though. Anyone know??
-Mindgame
where trey gets flustered and crys
Thread
Thread Starter
Forum
Replies
Last Post
PFYC
Supporting Vendor Group Purchases and Sales
2
Aug 24, 2015 06:41 AM