What lifters to get?
01-24-2011, 06:26 PM
#1
What lifters to get? I am building a 418 L92 motor and I have been doing research and some say LS7's will work and be ok and then there are some catastrophic failures with them. Morel's are a high price piece but I haven't heard any complaints about them. So, what lifters do I get for my motor?
01-26-2011, 04:15 AM
#7
FormerVendor
Actually the Morels seem to run fine with anywhere from .030 -.080 preload from all we have run. The HTL or limited travel deals though can only go .030 or less and you usually need adjustable rockers to run them or it will be too hard to get the correct preload.
We usually keep all of the Morels in stock or at least try to. We have both the link bar and the oem style lifters and use both a lot. The Morel wheels, axles and bodies can take a lot more punishment than the OEM lifters can if it ever happens for sure but with good valvetrain the LS7s usually run well too.
Most of the lifter failures we see with the OEM lifters are from running extremely aggresive lobes with too little spring at higher rpm causing valve float and instability etc. Also some of the aftermarket heads feature larger and longer and almost always heavier valves which also can cause issues with the wrong valvetrain parts.
I also like running the largest pushrods you can in even the hydraulic roller stuff if possible or heavier wall 5/16 and 11/32 if you can't fit 3/8 or larger.
We usually keep all of the Morels in stock or at least try to. We have both the link bar and the oem style lifters and use both a lot. The Morel wheels, axles and bodies can take a lot more punishment than the OEM lifters can if it ever happens for sure but with good valvetrain the LS7s usually run well too.
Most of the lifter failures we see with the OEM lifters are from running extremely aggresive lobes with too little spring at higher rpm causing valve float and instability etc. Also some of the aftermarket heads feature larger and longer and almost always heavier valves which also can cause issues with the wrong valvetrain parts.
I also like running the largest pushrods you can in even the hydraulic roller stuff if possible or heavier wall 5/16 and 11/32 if you can't fit 3/8 or larger.
Trending Topics
01-26-2011, 07:28 AM
#8
Actually the Morels seem to run fine with anywhere from .030 -.080 preload from all we have run. The HTL or limited travel deals though can only go .030 or less and you usually need adjustable rockers to run them or it will be too hard to get the correct preload.
We usually keep all of the Morels in stock or at least try to. We have both the link bar and the oem style lifters and use both a lot. The Morel wheels, axles and bodies can take a lot more punishment than the OEM lifters can if it ever happens for sure but with good valvetrain the LS7s usually run well too.
Most of the lifter failures we see with the OEM lifters are from running extremely aggresive lobes with too little spring at higher rpm causing valve float and instability etc. Also some of the aftermarket heads feature larger and longer and almost always heavier valves which also can cause issues with the wrong valvetrain parts.
I also like running the largest pushrods you can in even the hydraulic roller stuff if possible or heavier wall 5/16 and 11/32 if you can't fit 3/8 or larger.
We usually keep all of the Morels in stock or at least try to. We have both the link bar and the oem style lifters and use both a lot. The Morel wheels, axles and bodies can take a lot more punishment than the OEM lifters can if it ever happens for sure but with good valvetrain the LS7s usually run well too.
Most of the lifter failures we see with the OEM lifters are from running extremely aggresive lobes with too little spring at higher rpm causing valve float and instability etc. Also some of the aftermarket heads feature larger and longer and almost always heavier valves which also can cause issues with the wrong valvetrain parts.
I also like running the largest pushrods you can in even the hydraulic roller stuff if possible or heavier wall 5/16 and 11/32 if you can't fit 3/8 or larger.
01-26-2011, 07:35 AM
#9
11 Second Club
iTrader: (12)
Join Date: Sep 2003
Location: Monroe Wa.
Posts: 1,389
Likes: 0
Received 0 Likes
on
0 Posts
Morels here!! Thick wall pushrods, Was going to use LS7's but figured 500.00 was cheap insurance after I spent all that money on heads and shortblock.. I will say that after we got the motor together, I was using Scorpion Rockers and had one snap at the cup.. The big thin that saved the motor was the Link bar Morels!!! Just installed Trunion upgrade on my stockers. Will be running N20 and spinning this bitch to at least 7000 if not 7200!!
01-26-2011, 11:27 AM
#10
FormerVendor
It depends on how you set up the springs. Are you still using stock rockers? Thats a fastish lobe and a slightly heavy valve but not super heavy at 108-110g or so. The PRC 650 actually is still a pretty hoss spring. I think it tests a little stiffer than the specs say. I like the LSL with the actual LS3 valve but it's a little fast for the heavier L92 valve in my book although it will probably still run well.
02-01-2011, 01:48 PM
#12
What is the difference between the limited travel .030 lifters and the HLT lifters?
http://www.mcssl.com/store/cc-perfor...59fad3a420bc85
http://www.mcssl.com/store/cc-perfor...59fad3a420bc85
