Ignition Timing Map?
#2
Boost Pope
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Assuming your base timing is set to 10 degrees BTDC, the usual convention is one degree per PSI, however there are many variables from car to car.
Originally, I found that even with my FMIC I had to pull somewhat more timing than this to avoid pinging. There was no carbon fouling of the chambers and the fuel was spot-on, so I've never been able to explain this. Now that I am using water/alcohol injection however, I am pulling considerably *less* timing than this, and have not experianced any ill effects from it.
Originally, I found that even with my FMIC I had to pull somewhat more timing than this to avoid pinging. There was no carbon fouling of the chambers and the fuel was spot-on, so I've never been able to explain this. Now that I am using water/alcohol injection however, I am pulling considerably *less* timing than this, and have not experianced any ill effects from it.
#3
yeah make up a map that takes out 1 degree per PSI in the 3000 to 5000rpm zone.....BUT then add in i degree per 1000rpm above5000rpm,evry 500rpm below the 3000.....so at 10 psi youll have -8at 2000rpm,-9 at 2500 -10 at 3000-5000 then -9 at 6000 and -8 at 7000....
adding in those 2 extra degrees at high rpm makes a BIG BIG difference on top end power
adding in those 2 extra degrees at high rpm makes a BIG BIG difference on top end power
#5
use "Superplus-98 Octane" if you like your engine...
for the others- I'm from Germany, he's from Austria, we do have a different measurement system for the OCTAN numbers,
what he calls "91 Octane" is actually " 87 Octane " in the United States.
So what would you consider as a safe Octane number for running 10PSI?
German-------------------US:
normal (91)------------ 87 Octane
super (95) ------------ 90 Octane
Super Plus (98)--------- 93 Octane
Optimax (100)---------- >95 Octane
#7
Boost Pope
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<BUTTHEAD>Hehe. You said retard.</BUTTHEAD>
Assumes a stock 10°BTDC @ idle base timing, and WI. Could probably bump it a few more points with decent gasoline.
Assumes a stock 10°BTDC @ idle base timing, and WI. Could probably bump it a few more points with decent gasoline.
Last edited by Joe Perez; 08-15-2007 at 09:13 PM.
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