| Re: Make a 350 out of a 400??? |
Subject: Re: Make a 350 out of a 400??? by rklessdriver on 2009/7/13 19:31:25 Quote: Guys put a .015" feeler gauge between the roller and the valve (rocker), then crank the lifter down (at TDC) until the plunger bottoms out. Remove the feeler and you have exactly .015" clearance in the plunger on every lifter, rather than trying to get a specific preload. Joe I have used this valve adjustment on hyd rollers a few times in the past - but it really only mask the problem. With all the work I've put into mine in the past 2yrs (almost), I'm begining to dislike hyd rollers for serious hi-performance engines more and more everyday. Once you get to a certian point it is knives edge balancing act of valve spring, lobe rate and external stability. You get one bit out of kilter in any one of them and the whole shebang goes to hell.... I like mech rollers. If you have good oil supply at the lifter wheel and valve springs a mech roller will live a very long time. A tight lash lobe profile will go a long way to keeping the valve adjustment in check - which is the only other big killer of mech roller parts I have seen. With the HIPPO (MOREL and CROWER) lifters and spring oiler V/C or shaft mount rockers we have now I think one could make a mech roller live forever in a street car. I'll tell you what... If that fricken hyd roller in my 92 eats one more set of valve springs, I'm going to switch my car over to a T/L mech roller and find out. Will |
