Recent cam swap 232/234 595/598 112 lsa. comp 918 springs. Car runs great smooth (except at idle, love it). There is a slight tappet noise, not real bad , but noticeable to me at least. Seems to quiet down under load. I have heard this is normal and some motors just won't run quiet not matter how much they are adjusted. Others say they should run quiet with proper adjusting. I have experience with older 350 chevy doing the same thing and never could get it to run quiet. So let hear what eveyone thinks.

 

Anyone have an opinion here ??????

 

The factory rockers are non -adjustable so you have to change pushrod length to change lifter preload . Aftermarket cams have a smaller base circle than the factory cam so they require longer pushrods to make-up the difference . This is also subject to whether the cylinder heads have been milled too, which in turn would require a shorter pushrod . There are so many variables to factor in that the only proper way to determine what length pushrods you need is to measure with an adjustable pushrod . You can buy one from many of the sponsers on this site for around $20 , I got mine from Thunder racing . I hope this helps .

 

my tr224 had some noise right from the first start up. i used a 7.4 pushrod. its runs like a beast though.