hpfiend Posted September 27, 2013 Report Share Posted September 27, 2013 Hey all- It seems as if I adjust my rockers using EOIC method I get them too tight and lose compression. If I go to TDC I don't have any problems- what I am I doing wrong? Turn engine until exhaust valve moves off its seat, adjust intake valve on same cylinder. Turn engine until intake valve goes fully open and then half way closed, adjust exhaust valve on same cylinder. VS Bring cylinder to TDC and adjust intake and exhaust on that cylinder. Thanks! Quote Link to comment Share on other sites More sharing options...
accel_is_my_drug Posted September 27, 2013 Report Share Posted September 27, 2013 how much overlap are the cams? once you can be 100% sure the valve is fully seated, and the cam is on its base circle, you ought to be able to set tappets. Why are you shying away from TDC method? Quote Link to comment Share on other sites More sharing options...
hpfiend Posted September 27, 2013 Author Report Share Posted September 27, 2013 Books and others have told me that the TDC method is only accurate on stock camshaft profiles. Cam is 224/224 at .050 .450/.460 114 LSA I don't know how much overlap is involved there but fortunately this cam is a factory profile for an 80s Corvette. I had a much wilder cam in my mustang which I did EOIC on there as well (dunno if TDC method would have worked in that case) and good friend Rob LaSota let me know I screwed that one up too and he fixed it for me Quote Link to comment Share on other sites More sharing options...
Awfulcanawful Posted September 28, 2013 Report Share Posted September 28, 2013 I like the eioc method. I think you may be letting the intake valve come up too far before you adjust the exhaust. I wait until the intake valve JUST starts to close. This should cover any crazy cam overaps. For me it is faster and it will work on any engine reguardless of firing order or cam overlap. Quote Link to comment Share on other sites More sharing options...
Green Bastard Posted September 28, 2013 Report Share Posted September 28, 2013 Have you tried it with the motor running? Seemed to be the only way I could get the valves adjusted on my old Chevy truck. Quote Link to comment Share on other sites More sharing options...
PsychoticGaming Posted September 28, 2013 Report Share Posted September 28, 2013 Have you tried it with the motor running? Seemed to be the only way I could get the valves adjusted on my old Chevy truck. +1 Quote Link to comment Share on other sites More sharing options...
hpfiend Posted September 30, 2013 Author Report Share Posted September 30, 2013 Yes, that worked great.... On all but one cylinder. Now I am trying several methods while not running to be 100% it is a bad lifter before I tear it all apart again. I will try it just as it closes on the intake valve. Thanks! Quote Link to comment Share on other sites More sharing options...
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