i think i did a mistake..

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04-25-2010, 05:55 PM

#11

budhayes3

PT's Slowest Truck

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Quote:

Originally Posted by SweetS10V8

Youve heard bad things becuase no one runs them correctly. They are made to have .002"- .006" preload, thats it!!! This means these lifters require an adjustable valvetrain.

Ive run the heck out of 875-16 in LS engines, spun well over 7000 time and time again, but I know what Im doing.

I also run Comps 850-16 in my own personal vehicle, they are the "stock replacement" style needed for LS engines. Ive even run Comps newest LS "short travel" lifter in a few engines and would have gotten those for mine, but they werent released at the time I did my swap.

Well I wouldn't doubt that...a lot of parts get a bad rap because people install them incorrectly. I have heard that the comp stock replacements are reliable, it's just the R's that I've heard of having problems, but if guys are running them with too much preload, I could see how they would fail prematurely.

Good to hear that they're working out for you

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04-30-2010, 04:20 AM

#12

ByuTrukr

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I'm running those lifters now for about 2 years and no problem, I tried em with the pro magnum roller tip rocker with a 1.75 ratio and had valvetrain stability problems, or so I was told, i put the stock rocker arms back on and haven't had a problem since.the cam i'm running is.585 lift and with the extra amount on the rocker ratio was about .602 actual lift. I use the patriot gold dual springs and are suppose to be good for.650 I also had them preloaded so I know it was done right,but i had a problem,until i took the rocker arms off and went back to stock 1.7 stock ratio rockers

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04-30-2010, 07:51 AM

#13

SweetS10V8

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Stock rockers with Comps upgraded trunions are about as good as it gets. Plus the upgrade is only $130! Then you have to press them in or have someone do it for you.