First look....new LSX lifters
Yeah, the 2nd video is a little misleading in the sense that you can year the valves actuating through the intake. Also, the heads now have PRC dual springs instead of the comp beehives. I'm pretty sure that makes a bit of a difference. I'll try to take a vid of the car driving tonight on my way home...maybe that'll give you a better idea.
Thanks for adding the supplier info. Strange they haven't gone public yet.
On a side note, currently building a 383 for the Miata that will spin 7 to 7.5k ....and will be trying out Morel race linkbars on it....just for the hell of it. I don't think you'd go wrong with Morel either, if you decided to try them.
It's not necessarily quiet but I don't hear anything abnormal now. Most of that sound sounds like the injectors and the valvetrain noise amplified by the FAST intake.
You can call me Ray. Or you can call me Jay. But you don't gots to call me Johnsons!
I think I guessed that a long time ago.
Anyway, probably the biggest lifter manufacturer in the world, or at least they were.
Sounds like an LS to me......
Howdy James, we never hooked up did we! Summer be almost gone.....but getting into the best drag racing weather right now...
Ron
I think I guessed that a long time ago.
Anyway, probably the biggest lifter manufacturer in the world, or at least they were.
Sounds like an LS to me......
Howdy James, we never hooked up did we! Summer be almost gone.....but getting into the best drag racing weather right now...
Ron
Ditto, I have that loud noise down by the wheel wells as you do in the first video, not really prominent in the second video.
You can call me Ray. Or you can call me Jay. But you don't gots to call me Johnsons!
I think I guessed that a long time ago.
Anyway, probably the biggest lifter manufacturer in the world, or at least they were.
Sounds like an LS to me......
Howdy James, we never hooked up did we! Summer be almost gone.....but getting into the best drag racing weather right now...
Ron
I think I guessed that a long time ago.
Anyway, probably the biggest lifter manufacturer in the world, or at least they were.
Sounds like an LS to me......
Howdy James, we never hooked up did we! Summer be almost gone.....but getting into the best drag racing weather right now...
Ron
I'll just say that the price is right in line with the Morel race lifters....they were not cheap. I don't regret the purchase, but plan on trying out the Morel race pieces (with linkbars) on the new 383 build. I'm kinda funny like that...figured I'd give them a shot too. Make no mistake, you can still hear the valvetrain in the Miata currently....but it's 10x quieter than it was with the LS7 lifters.
Last edited by salemetro; Oct 5, 2012 at 03:17 PM.
Heya Ron...yeah, summer flew by! I've been meaning to catch up with you and check out your 'Vette, but have been too dang busy. I'm sure that you can relate. I'm hoping to run the Miata before the end of the year, but we'll see how it goes. For now, it's doing daily-driver detail, and waiting for a new engine
And guys, the valvetrain is pretty quiet! Unlike mine........
Ron
This is a very interesting subject, could someone please explain to me what everyone is talking about with preload, those numbers, and all the fancy terms. I appreciate it im trying to learn.
I don't disagree with you, and in my install I included the assumption that I would lose approx .010" to thermal expansion. If you do the install and everything is at 70* F and you assume 220* F temps fully warmed up, there's a 150* F differential. I'm no mettalurgist, but near as I can tell, aluminum expands about 13 micro inches per *F and steel expands about 8 micro inches per *F. 150 X 13 = 1950 micro inches of expansion for the aluminum, and 150 x 8 = 1200 micro inches. one micro inch = .000001". The aluminum would expand approx .000001 x 1950 = .00195" and the steel would be approx .000001 X 1200 = .0012". .00195" - .0012" = .0075", so, there may be a loss of about 7.5 thousandths of an inch. I set my cold pre load at .012" so that should have me in the .004 range fully warmed. I've been running the comp "r" that way for 3 or 4 years now w/o issue. That's the way I did it. Works for me. That's all I can say about it.
. Are these available to the public yet? They look a lot like the Morels I just bought.... 
