[oldman]

Morel is a good choice too. What nobody recs is the comp cam lifters.

[KingLT1]

Yep...I ran Morel 5315 drop-ins in my H/C LS with great results. They have been since replaced by the 6504. 10-15k miles on the setup over a span of 4yrs with a plethora of WOT runs up to 7200rpm. I ran a fairly mild comp XE cam with SLP 1.85 rockers and pac dual .650 lift springs. The heads were TEA ported LS6 castings with the sodium filled valves...she liked to rev.

[oldman]

King, what was the total lift on your setup?
Let me ask this as an aside, I tossed around the idea of putting the LT4 titanium valves into the LT1 head, looks like the aftermarket all spec a different "kit" for it. Why is that? I think I checked at that time (last year) and even the spring, keeper and retainer?, and exhaust valve were the same part number between the heads. Anyway I know you would know.

[RUQWIKR]

Originally Posted by oldman

King, what was the total lift on your setup?
Let me ask this as an aside, I tossed around the idea of putting the LT4 titanium valves into the LT1 head, looks like the aftermarket all spec a different "kit" for it. Why is that? I think I checked at that time (last year) and even the spring, keeper and retainer?, and exhaust valve were the same part number between the heads. Anyway I know you would know.

If memory is correct, there is a difference of 0.065" stem length between LT4 vs. LT1 intake with different keeper groove locations. You can use them with the special LT4 intake valve spring retainer or an aftermarket one. Typically will need a shim of a given thickness depending on what spring and targeted load.

[oldman]

thanks, makes sense, I have to look into the retainer part number (hence I added the question mark on that one). I went to a solid stem, undercut head Manley Proflow so it fullfills two rolls: stronger, better flow, the Titanium fullfills two rolls: stronger, lighter. I have still valve springs anyway, but if I was going DoD crazy with boost, I would have sprung for the slightly more expensive LT4 intakes.

I show this LT4 intake only valve retainer12654813, so this retainer in use with the LT4 valve must bring the same spring used in all applications to the correct spring height, I wodner what the slightly longer valve does, I assume it is for tip to rocker alignment. The longer valve in theory going from memory would move the contact out board of arm given a slightly increase rocker ratio and quicker opening along with slighly more lifter load, of course this would require slightly more closing pressure which GM gets by using a way lighter valve... hm intresting.

[KingLT1]

Originally Posted by oldman

King, what was the total lift on your setup?
Let me ask this as an aside, I tossed around the idea of putting the LT4 titanium valves into the LT1 head, looks like the aftermarket all spec a different "kit" for it. Why is that? I think I checked at that time (last year) and even the spring, keeper and retainer?, and exhaust valve were the same part number between the heads. Anyway I know you would know.

.581 on my LS

[joe111599]

Originally Posted by KingLT1

Yep...I ran Morel 5315 drop-ins in my H/C LS with great results. They have been since replaced by the 6504. 10-15k miles on the setup over a span of 4yrs with a plethora of WOT runs up to 7200rpm. I ran a fairly mild comp XE cam with SLP 1.85 rockers and pac dual .650 lift springs. The heads were TEA ported LS6 castings with the sodium filled valves...she liked to rev.

Would these be sufficient for TS VVT-3 cam? I am installing cam kit and want to get better lifters (kit came w/ LS7's). Trying to decide between Morel 6504's and Johnson 2110's. Also ran across some Morel 5290's w/ linkbar for 395.00 I am considering. Thoughts???

[KingLT1]

Originally Posted by joe111599

Would these be sufficient for TS VVT-3 cam? I am installing cam kit and want to get better lifters (kit came w/ LS7's). Trying to decide between Morel 6504's and Johnson 2110's. Also ran across some Morel 5290's w/ linkbar for 395.00 I am considering. Thoughts???

If the engine is going to live at 7k+ rpm in a racing application then the Johnson 2110's are the go to for a drop in lifter. If it's the week end car that will see spirited driving with a some WOT blasts or occasional track use then the 6504's will be fine. The Johnson is superior for sustained high rpm use. Both are a step up in their ability to handle heavier springs and more aggressive cam lobes compared to the LS7's.

[Boost Creep]

Originally Posted by RobbyBeefcake87

As preventative maintenance after warranty is up and for small cam applications, would gm performance ls7 #12499225 lifters work on a stock lt1 without changing anything else out?

Maybe new push rods if the length is a little different. Initial research says they might be .5 shorter so might need slightly longer push rods.

Have a guy selling some gm performance lifters for cheap in the box new as he recently sold his z28. I've been under the impression that they would work just fine also but want to make sure. Part number 88958689.

Originally Posted by JANNETTYRACING

Yes they will work but you need Head gaskets, head bolts, valve cover gaskets intake gaskets, exhaust gaskets valley plate gasket and lifter buckets for the install and about 16 hours of labor.

Your better off doing a complete cam package all at once for the amount of work to change out just the lifters.

I was thinking with all the gaskets and head bolts/studs and everything else to throw a set of heads on it just to make it worth the aggravation, not quite the extra work of a cam, but at least add some cleaned up/ported heads while it's apart for a little bump in power.

[RobbyBeefcake87]

Originally Posted by Boost Creep

I was thinking with all the gaskets and head bolts/studs and everything else to throw a set of heads on it just to make it worth the aggravation, not quite the extra work of a cam, but at least add some cleaned up/ported heads while it's apart for a little bump in power.

Same, ported heads along with ported msd, 2" headers, ported 95tb, cai, and e85. Should be a fun setup and pretty reliable.

[joe111599]

Originally Posted by KingLT1

If the engine is going to live at 7k+ rpm in a racing application then the Johnson 2110's are the go to for a drop in lifter. If it's the week end car that will see spirited driving with a some WOT blasts or occasional track use then the 6504's will be fine. The Johnson is superior for sustained high rpm use. Both are a step up in their ability to handle heavier springs and more aggressive cam lobes compared to the LS7's.

Thanks! I also ran across some Morel 5290's (w/ link bars) for 399.00 shipped. Opinions on these? This will be more of a street car and race a few times a year. Just don't want to have to tear back into this motor after 10k miles to replace lifters lol! Appreciate the help!

LINK: https://www.tickperformance.com/more...nes-part-5290/

[KingLT1]

You don't need link bars for that setup. Either the 6504 or 2110's will be fine.