madden87 Posted September 25, 2008 Share Posted September 25, 2008 My lifters are making a lot of noise. They are fine at idle, but all of them get very loud after about 1500 rpm. I just installed a flat tappet voodoo cam with their hydraulic lifter kit. The valve springs are 1.46 single springs and I am using 10-40 oil with a zync additive. I followed the instructions for breaking the cam in but they still make noise. Has anyone installed one of these kits? Any advise? I did call Lunati and they recommended setting the valves to zero lash they a 1/4 turn instead of 1/2. I did that and they sound the same. Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted September 25, 2008 Share Posted September 25, 2008 Im thinking youve got a clearance issue, are the lifters loud if both valve covers are removed/ does the sound change when you back the adjustment nut out just to the point it starts clicking then tighten just to the point the clicking stops at idle then you add a 1/4 turn? whats the cam lobe lift? whats your spring bind height? did you verify the piston to valve clearance? retainer to valve seal clearance? pushrod to guide clearance? retainer to rocker? rocker to rocker stud? rocker stud to rocker slot? etc.??????? have you found the source or are you guessing? Quote Link to comment Share on other sites More sharing options...
madden87 Posted September 25, 2008 Author Share Posted September 25, 2008 For the most part I am guessing. I have never seen all the lifters make noise before so I am asking what to check. Cam lobe lift is .510. Spring are single 1.46 with 120lbs seated at 1.8" and 275lbs open at 1.25". Piston to valve clearance is fine, but as far as everything else I have not meassured them. Lunati said to set the lash at zero and go 1/4 turn so I did that. They also said to use 10-40 oil. I did that. They sound the same. It is fine at idle but about 1500rpm they all clatter. The only other thing Lunati said to try was just let it break in. That did not sound right to me so I am now asking for experienced help. Grumpyvette, everything I have read says you are the guru so what should I try next??? I will list everything that I replaced in this little project: Dart 200cc heads with 64cc chambers. 2.02 and 1.60 valves. Springs are listed above. ProComp hardened pushrods to go with the guideplates. They are standard length. Voodoo 268 cam and their lifters that came in a kit. Victor Jr. intake manifold. I already had 1.52 rocker arms. The pistons are .030 flat tops with 4 valve reliefs. When I changed the oil I drained it into a clean pan to inspect it for and metallic shavings. I did not find anything. I also cut open the oil filter and it was clean as well. The tech at Lunati did not seem like it was anything, but it is not his motor so let me know what I should check next. thanks Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted September 25, 2008 Share Posted September 25, 2008 you have a pm lets talk Quote Link to comment Share on other sites More sharing options...
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