Rocket

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by all-mtr-teg &raquo;</TD></TR><TR><TD CLASS="quote">Would there be any benefit in using the newer spring design for a relatively low lift cam?</TD></TR></TABLE>

New LMA's are not needed if you have good used LMA's. Just that people loose stuff all the time and these parts are fairly expensive to replace with parts purchased from the dealer.

Combustion Contraption

Just a quick update, The new LMA's bind at about .400" lift, and at this point are exerting about 145lb of pressure. This was a real quick test and Ill post some more interesting findings later.

Rocket

Keep in mind that 0.400" x 1.55 rocker ratio gives you about 0.620" or 15.5mm.

Rocker Ratio fo da win!!! w00t w00t.

mar778c

iTrader: (1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by defrezzer1 &raquo;</TD></TR><TR><TD CLASS="quote">the Springs are just noise Supressor.

why should there be a benefit ? </TD></TR></TABLE>

Lol, please remove your LMAs and lets see how long your head lasts.

92integraVTECgsr

did you get your big test done?

I used these in my friends b16 build back in February. His is just stock b16.

I want to see these with some big cams at high RPM's.

My friend has a K20 and must have over revv'd or something, but he bent 2 of these types of LMA's.

Combustion Contraption

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Master of the Universe &raquo;</TD></TR><TR><TD CLASS="quote">Keep in mind that 0.400" x 1.55 rocker ratio gives you about 0.620" or 15.5mm.

Rocker Ratio fo da win!!! w00t w00t.</TD></TR></TABLE>

Why do you have to bring all that complicated math into the matter? I was gonna bring this up in my follow up post along with, does anyone care to guess what happens to these LMA's after coil bind? MOTU is not allowed to answer.

Combustion Contraption

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92integraVTECgsr &raquo;</TD></TR><TR><TD CLASS="quote">did you get your big test done?

I used these in my friends b16 build back in February. His is just stock b16.

I want to see these with some big cams at high RPM's.

My friend has a K20 and must have over revv'd or something, but he bent 2 of these types of LMA's. </TD></TR></TABLE>

This wasnt a big test, just a quicky on a RIMAC tester. The "big test" will come in a few weeks when these are used in my personal 85x89 w/ pro2's. Keep in mind Honda uses this type of LMA on H series/K series/F20 series. The K and F especially see alot of RPM off the showroom floor.

dplatt

Coil bind under the rocker means cam can't spin, so I'm guessing cam breakage.

N20civicB18

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dplatt &raquo;</TD></TR><TR><TD CLASS="quote">Coil bind under the rocker means cam can't spin, so I'm guessing cam breakage. </TD></TR></TABLE>

Or cam cap/bolt

Combustion Contraption

Whats different about this spring than a "standard" valve spring that we are used to seeing?

Fink29

I have an idea what you are hinting at but I cant put it in the right words (even though it seems to be easy to understand, I feel like I lost some brain cells over the past few years lol Thanks HT).

I think it has something to do with the spring being tapered on the top/bottom (I just leave it at that).

patriot

iTrader: (2)

Progressive rate.

Combustion Contraption

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by patriot &raquo;</TD></TR><TR><TD CLASS="quote">Progressive rate.</TD></TR></TABLE>

You are getting close. Visualize the LMA getting close to coil bind. This will make it more obvious.

Rocket

It's self-centering.

Rocket

What happens when ya step on this



Confucious say "Wocket fo da whin!!!"

mike-y

spring is tapered at the top. I'm guessing you get spring deflection at coil bind and the small end of the spring gets shoved inside the larger coils, so its got some give instead of stacking up solid like a regular valvespring.

Combustion Contraption

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike-y &raquo;</TD></TR><TR><TD CLASS="quote">spring is tapered at the top. I'm guessing you get spring deflection at coil bind and the small end of the spring gets shoved inside the larger coils, so its got some give instead of stacking up solid like a regular valvespring. </TD></TR></TABLE>

patriot

iTrader: (2)

http://www.fennelfamily.com/gt....html

mike-y

woo woo

:D

And thanks for all the information on this, Combustion!

FlatBrokeHatch

Definately something I'm investing in soon for my Crower 3's.

Kr4nG

iTrader: (1)

how many lma's are in one head. what do the lma's do they adjust the valve height? the old lma's have a spring inside them too right?

Pondus

There are 8 of them, the VTEC rocker rides on them when it's not in action.

stumpyf4

So I called the local Honda dealer and asked them to look up some part info. In Canada there is no part number supersession, pricing of the newer style is actually higher... go figure.

New Style Spring LMA 14820-PCB-305 $67
Older Piston Type LMA 14820-P73-J01 $47

I'm going to run Pro1's and when degreeing the cams didn't find that my GSR LMA were not binding. Which one would you run and why?

Rocket

NU STYLE IS SIMPLIER

Less likely to come apart.

Simplicity fo da win!!!!

American.Graffiti

iTrader: (7)

This thread has turned into a class. My IQ has gone up 3 points. Now the real question is if, (or more so when I have the money), will you be inspecting LMA's and replacing them when necessary? Question directed towards Combs.