Cool. I'll let you know. Hoping to catch a break here, but doesn't usually work for me . . .
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Or if you can wait for a week, I can have my dad drop it off for you. He makes weekly trips to gardena for work. He drives a company car, he'll make a detour for me
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Most of what I have seen on lifter failure when someone bothers to analyze the mode failure and not make assumptions indicates it's a poorly matched spring rate, improperly measured push rod length, etc. His point was OE performs just fine in moderate applications when properly installed. Big cam race motor, different story.
Heads came in at 60cc and motor with stock pistons apparently 11.2:1. Which explains why especially in the summer I had to bump my gas with a little Torco or Toluene to avoid pinging. Headers and a retune might fix that problem but I'll lower it anyway so I can run commie gas without worries. |
If I'm understanding correctly, a -7cc dish should take me to around 10.9.
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Yea I agree. Stock lifters are less than ideal. Tons of guys use them and tons of shops install them with big cams and heavy springs. I'm not sure why, but people think the LS7s are the end all, be all. The LS7 breaks all the time. I'm going to use a link bar in mine. Looking at a set of crane link bar lifters. Not that much more than stock. There are failures all the time of lifters because people don't use them properly.
Another issue is rockers. Many people use stock rockers. They start spitting needle bearings when you abuse them. So people put the upgraded trunnions and bearing to a captured needle type... Which is fine, but you can't use them in a .650+ lift combo. People do, things break, people blame the rockers. |
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My primary failure was a rod bearing, that's what was making noise and best guess indicates a detonation precipitated the impending failure. Pulling it apart we discovered (so far) a broken ring and a chewed up cam. Previously it was an AM spring that popped. Unless I'm forgetting something, nothing OE in the valve train failed or even looks tired. :huh: It's not a lot of money difference, so that's not my concern here, but spending a few hundred dollars extra for nothing more than a little more valve train noise in reality doesn't appeal to me either. |
There was an engine builder challenge some time ago where they took a stock LS3 engine and the only changes were a trunion upgrade, chromoly pushrods, 165lb dual coil springs, billet timing set and link bar lifters and it was good for 33bhp.
If you want to go the money way. Comp magnum rockers, comp XM Pushrods, Comp lifters, Lunati Chromoly springs If you want to go the cheap way, Pro comp everything, which I wouldn't recommend Or the sensible way. Morel Lifters, PNW/PNP pushrods, Trunion upgrade, EP, or Comp springs. |
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