Best available lifters for ls7
08-31-2014, 01:26 PM
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Best available lifters for ls7 As the title says, I have an 06 corvette with 2147 miles on it, and it has at least one dead lifter. Looking for the best option, no cost concerns. Car has a cam from Redline, unsure of what exactly it is, but it did not require a spring upgrade, so I assume it isn't too radical. Other than that, the car has Kook's long tubes and a cold air intake. I bought the "good" morel's, 5206's, for my lq4 turbo motor, but haven't used them yet, so no opinion.
I also am interested in anyone's opinions as to head gaskets and studs or bolts. I would assume new stock gaskets would be fine, but hate to go back in with stretch bolts. I realize it won't have crazy cylinder pressures with it being n/a, but is there any reason NOT to put a set of arp studs in it?
Thanks, guys.
I also am interested in anyone's opinions as to head gaskets and studs or bolts. I would assume new stock gaskets would be fine, but hate to go back in with stretch bolts. I realize it won't have crazy cylinder pressures with it being n/a, but is there any reason NOT to put a set of arp studs in it?
Thanks, guys.
08-31-2014, 02:39 PM
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I like using ARP head studs but bolts are easier to deal with and just as effective.
Here's a good set of hydraulic roller lifters that can take the fun and laugh.
https://www.texas-speed.com/p-598-lu...-tie-bars.aspx
As for head gasket contact Cometic and you may want to get a set of 0.043 thick MLS while you are at it instead of the OEM 0.051 by 4.130 bore so to gain a little extra compression if you are game, always check piston to head clearance when ever so doing.
Here's a good set of hydraulic roller lifters that can take the fun and laugh.
https://www.texas-speed.com/p-598-lu...-tie-bars.aspx
As for head gasket contact Cometic and you may want to get a set of 0.043 thick MLS while you are at it instead of the OEM 0.051 by 4.130 bore so to gain a little extra compression if you are game, always check piston to head clearance when ever so doing.
08-31-2014, 03:58 PM
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You should not have killed a lifter unless you have another issue. I would not run any aftermarket cam without upgrading valve springs. Lunati or morel make good options with the link bars. Morel 4708 uses the stock trays. All morel lifters are hard to find right now. If I were you, I would go with some good valve springs and lunati 72347 lifters they are the 5206 equivalent,
Last edited by treybadd; 08-31-2014 at 04:09 PM.
08-31-2014, 04:04 PM
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I like using ARP head studs but bolts are easier to deal with and just as effective. Here's a good set of hydraulic roller lifters that can take the fun and laugh. https://www.texas-speed.com/p-598-lu...-tie-bars.aspx As for head gasket contact Cometic and you may want to get a set of 0.043 thick MLS while you are at it instead of the OEM 0.051 by 4.130 bore so to gain a little extra compression if you are game, always check piston to head clearance when ever so doing.
08-31-2014, 04:31 PM
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Thanks for all the replies, guys. I honestly don't know what is wrong yet, as the car is in my shop driveway in the trailer. It has a valvetrain noise, loose rocker arm tapping sound, comes and goes, and that's all I can tell you yet. It belongs to a good customer of mine and I was assuming the problem would be a lifter due to their failure history.
The owner had Redline change the parts listed and tune the car well before I met him. Since, I have built him several complete cars as well as several smaller projects, and no one else touches his cars now. The valvesprings being stock is from the owner's recollection, not my findings.
If the short travel lifter is a poor choice, why, and what do you suggest? Should I NOT install my 5206's for any reason? As I could just replace them for my own project?
Again, thanks for the input.
The owner had Redline change the parts listed and tune the car well before I met him. Since, I have built him several complete cars as well as several smaller projects, and no one else touches his cars now. The valvesprings being stock is from the owner's recollection, not my findings.
If the short travel lifter is a poor choice, why, and what do you suggest? Should I NOT install my 5206's for any reason? As I could just replace them for my own project?
Again, thanks for the input.
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08-31-2014, 05:52 PM
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Do recommend PAC beehive performance springs.
Don't think these are short travel lifters which WILL need adjustable rockers.
This picture may be representing those lifters...
http://www.performanceboats.com/dyno...t-7k-rpms.html
Don't think these are short travel lifters which WILL need adjustable rockers.
This picture may be representing those lifters...
http://www.performanceboats.com/dyno...t-7k-rpms.html
08-31-2014, 09:48 PM
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72332 lunati street = morel 5290
72437 lunati high rpm .750" roller = morel 5206.
72532 lunati sig series lim.travel race= morel 5294 .750" roller
Morel 5274 warhawk block style will fit stock block (5206 with different tie bar). .750" roller
5850 morel Motown and stock block hlt
72437 lunati high rpm .750" roller = morel 5206.
72532 lunati sig series lim.travel race= morel 5294 .750" roller
Morel 5274 warhawk block style will fit stock block (5206 with different tie bar). .750" roller
5850 morel Motown and stock block hlt
Last edited by treybadd; 09-01-2014 at 10:35 AM.
09-02-2014, 01:33 PM
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09-02-2014, 06:59 PM
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09-02-2014, 09:21 PM
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What happened? Lifters get blamed for improper spring installs all the time. Guys buy a cam and install the springs but don't check install height or seat pressure. Then you float valves and blame lifters. Not saying that was the case in your engine, but this happens all the time. Did you ever float a valve?
09-02-2014, 09:25 PM
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And what oil and weight were you running when the lifters failed? What are the details of your cam? Pushrod OD and wall thickness? Spring type and mileage on them? Preload on lifters? How long did they last?
09-02-2014, 09:49 PM
#18
What happened? Lifters get blamed for improper spring installs all the time. Guys buy a cam and install the springs but don't check install height or seat pressure. Then you float valves and blame lifters. Not saying that was the case in your engine, but this happens all the time. Did you ever float a valve?
New engine, dyno time only, no valve float. Developed a bad miss, found one of them wasn't staying pumped up. It was that simple. Didn't over think it, considered the Morel 5206's, but bought "local" instead.
09-02-2014, 10:01 PM
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I'm just asking because morels are ******* hard to find right now and Ed at FTI got me some 72347's. They SHOULD be the same as the morel 5206's. I have heard of lunati lifters having issues bit not morels. Mostly the cast body street versions. I like to get all the details. I guess I'm like rain man.
09-06-2014, 05:23 PM
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Well, sometimes you need to just take it apart and inspect. The intake rocker pedestal cast into the head is snapped off. #7 is at fault, and it seems the rockers are awfully tight. Maybe the installer hydraulic locked the threads and cracked it??? Is this a known issue with the ls7?? Searching now....