ok you said if i see knock retard the timing a little bit
how do you know weather to retard the timing or when to add more fuel?
You don't really need an EGT gauge, but it can be a good advanced tuning aid.
+2 on the tuning link (
http://www.vortexbuicks-etc.com/TuningBasics.htm), which is where I got the below quote.
Here is a quote from vortexbuicks :
"Now, before we start adjusting fueling/boost (or timing), remember one thing. Detonation is Bad! If your buddy told you that a little detonation is okay, he probably has not had to change head gaskets, or had to buy a new engine- yet. The more boost you run, the deadlier, in small amounts, detonation becomes. Detonation is Bad! A degree, or two, on the shift to second may be okay, although I would prefer none, but, it must go away immediately after the shift and not linger, or increase. Detonation not only damages head gaskets, pistons, rings, piston pins, bearings, and the crank, but, it actually slows down the acceleration of the piston as it tries to reverse the direction of the crank when the piston is pushed down against the normal direction. Just say NO to Detonation.
Look at the EGT recorded on the baseline runs. If it is relatively low, say 1400 degs, and there was no timing retard, raise the boost one pound and make another run. Observe the maximum EGT again. If it is still relatively low, say below 1550 degs, then do another iteration with another ONE pound of boost. Continue this until you either hit 1550 degs, or you begin to see a trace of timing retard. Please note that I chose 1550 degs Fahrenheit as an arbitrary number. Some cars run best at slightly higher temps, but, you will have to find your optimum, safe number by trial and error.
When you see a hint of detonation as evidenced by a slight amount of timing retard, try adding an additional 2# of fuel pressure without changing the boost and see if that makes the timing retard go away and the EGT fall back.
If there is no longer retard, try adding another pound of boost and repeat the process. Once you have arrived at the point where adding fuel does not get rid of the timing retard, I would back up one pound of boost below the last point where there was not timing retard in order to have a little margin for error. Listen to the knock alarm. If it goes off, Lift! Give the engine a chance to fight another day."