Quote:
Originally posted by SmokinStangGT
-Does a new valve tap until it wears in?
-Would a slow cranking cause compression to not be as high as the fast cranking?
-How can i fix the tach so it resets at zero instead of 2000 rpm? THANKS!!!!
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-NO
-YES
-TURN THE ZERO SCREW
Seriously, when you put stiffer springs in, the valve train noise does get a little louder but if you have a tick in one valve, i'd say somethin's up.
As for cranking compression checks, yes if you turn the engine real slow it will read different. Cranking pressure is affected by cranking speed, ring condition, cam timing, whether you have all the plugs out, whether you are holding the throttle wide open. Generally speaking the most important thing is that the cylinders are all equal ... at least withing about 10% of each other. One being 189 compared to 185 is not unusual at all. If you have alot of valve overlap and duration with the cam you're using, you will have lower cranking compression (that does not mean you will have low compression). Static compression and cylinder pressure at speed are two different things.
As for the tach most of them have a zero screw somewhere, but first you should find out if you have some latent voltage on the tach wiring when the engine is off. Unplug it ... if it goes to zero you have another problem ... if the needle stays high then there should be a zero screw you can adjust somewhere.
Hope that helps ?