Down goes another Lunati - Chevelle Tech
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post #1 of 57 (permalink) Old Jul 3rd, 20, 6:40 AM Thread Starter
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Tyler
 
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Down goes another Lunati

Well, all done with Lunati. Really wanted to make it work but they are really draining my wallet and my patience. Second one lasted about five minutes. Talked to Lunati and sent them a bunch of info and pictures but haven’t heard back from them yet. Putting the Edelbrock back in so I can at least drive the damn thing before it snows again. What really pisses me off is that the Edelbrock broke in very nicely WITHOUT having to baby a thing both Lunati’s came apart even treating them like fine china. And yes, in the future everything will be full roller, that would have been WAY cheaper in the long run. The ONLY possible thing it could be at this point is spring pressure, but the Edelbrock handled it just fine and the Lunati acts like it was built out of soft lead. What does this say about the long term durability of the Lunati?!? Anyway, we’ll see if Lunati will be willing to work with me or not but at this point I’m just plain ticked off at their stuff.
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post #2 of 57 (permalink) Old Jul 3rd, 20, 7:44 AM
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Re: Down goes another Lunati

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Originally Posted by Chebell View Post
Well, all done with Lunati. Really wanted to make it work but they are really draining my wallet and my patience. Second one lasted about five minutes. Talked to Lunati and sent them a bunch of info and pictures but haven’t heard back from them yet. Putting the Edelbrock back in so I can at least drive the damn thing before it snows again. What really pisses me off is that the Edelbrock broke in very nicely WITHOUT having to baby a thing both Lunati’s came apart even treating them like fine china. And yes, in the future everything will be full roller, that would have been WAY cheaper in the long run. The ONLY possible thing it could be at this point is spring pressure, but the Edelbrock handled it just fine and the Lunati acts like it was built out of soft lead. What does this say about the long term durability of the Lunati?!? Anyway, we’ll see if Lunati will be willing to work with me or not but at this point I’m just plain ticked off at their stuff.
Cam failure? There site does say ground in the USA, but when I asked a tech there the other day he said they came from Morel.

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post #3 of 57 (permalink) Old Jul 3rd, 20, 8:41 AM Thread Starter
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Tyler
 
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Yes, cam failure. When I talked to them they said there are only two that still make flat tappet blanks then the different companies go from there. There is clearly a difference in heat treat or something. I used brand new Lunati lifters on all three cams and the Edelbrock looks perfect, the Lunati’s were trash in no time. Spending a ton of money at the machine shop because of junk parts!!
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post #4 of 57 (permalink) Old Jul 3rd, 20, 8:58 AM
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Re: Down goes another Lunati

That sucks Tyler. I;m not a huge roller fan, but I also reckon that my 25+ yr old solid cam is simply good metal, and today's well....I;d only use Crower and Isky anymore myself on flat tappets, or custom.

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post #5 of 57 (permalink) Old Jul 3rd, 20, 9:05 AM
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Re: Down goes another Lunati

Talked to a guy last week that had his Lunati 460 Ford cam go south after 45 minutes.
What I found out from him was he used Diesel oil with the Additive recommended by lunati and did put assembly lube on the lifters, molly lube.

But his spring pressure open was 345.
You must not put that molly cam lube on the side of the lifter ..I have no idea if he did that or not.

I use Driven Break In oil and no additives and keep open pressures under 300.
I have used Crower cam saver lifters on all my hydraulic flat tappet cams and have used Molly paste and have used
Driven assembly lube and no issues.
Oil goes on the side of the lifter body.

I wonder if the Lunati lifter is slightly larger diameter than an Edelbrock lifter.
Get molly or other thick lube on the side of a tight lifter and it may not spin well.

I do not know as I have not tested that aspect.. just something that crosses my mind.

I had a friend install his own disc brake pads and got the Lube for the pins and read it and it said to put on all moving parts.
He greased his pads and rotors and not the pins.
Stopped fine.
Not the way to use the lube though.
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post #6 of 57 (permalink) Old Jul 3rd, 20, 9:18 AM Thread Starter
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I used the molly on the lobes only, assembly lube on the bearing surface and soaked the lifters in oil. Primed, primed and primed again. I went way above compared to what i did for the Edelbrock and it shows zero issues.
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post #7 of 57 (permalink) Old Jul 3rd, 20, 9:24 AM
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Re: Down goes another Lunati

PS, with 135/370 open, I ran the cam in (twice) on outers only. I'd never run 345 open on flat tappet break-in. Never.
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post #8 of 57 (permalink) Old Jul 3rd, 20, 10:11 AM Thread Starter
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I’m sure it has to do with spring pressure, there nothing else it could be other than junk steel. I’m just in disbelief that there is such a massive difference between the two manufacturers........all other things being equal.
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post #9 of 57 (permalink) Old Jul 3rd, 20, 10:14 AM Thread Starter
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I would certainly run it in twice too........but the damn things won’t make it 1/3 of the way the through the first run in. It’s all good, getting to know every nook and cranny of my engine parts anyway.
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post #10 of 57 (permalink) Old Jul 3rd, 20, 10:59 AM
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Re: Down goes another Lunati

Maybe rolling the engine over and over and over to get oil up top is washing the lube off the lobes too?
Plus spring pressure.
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post #11 of 57 (permalink) Old Jul 3rd, 20, 11:12 AM Thread Starter
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I only rolled it over to set the lash, and I was very careful to only roll it as much as absolutely needed for that purpose. I primed it with and old dissembled distributor and a drill motor.
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post #12 of 57 (permalink) Old Jul 3rd, 20, 12:31 PM
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Re: Down goes another Lunati

What cam was it ? Just curious.



Chris Straub would know for sure but I am fairly sure there are only one or two suppliers of cores.



As near as I have been able to tell Edelbrocks cams are just "generic" grinds that are the same as a lot of other companies mild cams. Not sure who actually makes them.
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post #13 of 57 (permalink) Old Jul 3rd, 20, 1:33 PM
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Re: Down goes another Lunati

If my memory is any good, I think you need to ask for a P-55 cam core, which are in limited supply. Chris said that when OEM stopped using FT cams, the quality stopped too.

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post #14 of 57 (permalink) Old Jul 3rd, 20, 1:57 PM
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Re: Down goes another Lunati

Quote:
Originally Posted by Chebell View Post
Well, all done with Lunati. Really wanted to make it work but they are really draining my wallet and my patience. Second one lasted about five minutes. Talked to Lunati and sent them a bunch of info and pictures but haven’t heard back from them yet. Putting the Edelbrock back in so I can at least drive the damn thing before it snows again. What really pisses me off is that the Edelbrock broke in very nicely WITHOUT having to baby a thing both Lunati’s came apart even treating them like fine china. And yes, in the future everything will be full roller, that would have been WAY cheaper in the long run. The ONLY possible thing it could be at this point is spring pressure, but the Edelbrock handled it just fine and the Lunati acts like it was built out of soft lead. What does this say about the long term durability of the Lunati?!? Anyway, we’ll see if Lunati will be willing to work with me or not but at this point I’m just plain ticked off at their stuff.
The lifter in the picture has not been rotating. The cam lobe path can be clearly seen in your picture. Was there a burr in the block that could have kept the lifter from rotating? If the lifter cannot spin it will wear out very fast just like your picture. A lifter that rotates and wears out is concave evenly. Yours shows a lobe track. I would get a dingleberry hone and run through the lifter bores and make sure all the lifters spin freely.
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post #15 of 57 (permalink) Old Jul 3rd, 20, 10:55 PM Thread Starter
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I made sure they were all spinning, so they were to start with anyway. I pulled a couple that do have a perfect little “bowl” in them. These are the two cams that failed.
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