Combustion Contraption

Porting a head for a customer, I advised him to switch to the newer LMA style for his build (aftermarket cams, road racing, he was using the old tapered nipple style LMA's). I placed the order for the parts and went to pick them up. Apparently, Honda is no longer making the LMA we are all used to for the BVTEC heads, and instead have switched to the spring style as found in S2000, K-Family, and OBD2 Preludes. The old part # has been superceeded to 14820-PCB-305, which is NOT the same as the OBD1 Prelude w/ .040" washer trick, which was part # 14820-PCB-003. Below are some pics...


Old Vs. New



Height Measurement



Height Measurement

As you can see, they are roughly the same height, within a few thou which is within the range of acceptability due to the fact that I was taking the pics with one hand while holding the caliper with one hand and may have fudged the measurement just a bit. I will be doing a coil bind pressure test in the next few days , I'll update this thread when I do.

non-VTEC

wow...interesting........you can even see there is a shim/washer at the bottom to take up the extra space.....

MAX_CFM

sweet .... looks like modified LMAS will be a thing of the past ..

b19coupe

Interesting-keeping the AM forum tech

jdm_ef9

good info

Runnerdown

I got a set from honda for a 2000 si about a month ago and thats what I got. Much cheaper too

Adam.C

Im kinda noob but is this new style better? If so how?

mar778c

iTrader: (1)

Very interesting.

Godspeed07

also noob question, but are they lighter???? if so would that even benefit the motor at all???

Armed Ferret

tag for personal edification. and edjumication.

Combustion Contraption

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Adam@VisionaryAuto &raquo;</TD></TR><TR><TD CLASS="quote">Im kinda noob but is this new style better? If so how?</TD></TR></TABLE>

Havent done any hardcore testing, so I cant give a concrete answer, but if Honda went to this style for their advanced performance engines (H22A, K20A, F20C, F22C) its probably something worth looking at.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Godspeed07 &raquo;</TD></TR><TR><TD CLASS="quote">also noob question, but are they lighter???? if so would that even benefit the motor at all???</TD></TR></TABLE>

Yes, they are lighter. I dont have numbers. The force is pretty small , but if you subscribe to the "every little bit helps" club, maybe you will sleep better at night.

h46it

CC,

Great info! Keep us informed!

96Spec Ek

Very interesting. I am curious to see how they will work. How much are they compared to the old lma's? I need to pick some up as soon as my head is back from NRGTech.

EDIT.....

$22.24 each at hondapartsdeals.com
http://www.hondapartsdeals.com...8&y=7

If anyone here can beat that price let me know.


Modified by 96Spec Ek at 12:26 AM 6/2/2008


Modified by 96Spec Ek at 12:27 AM 6/2/2008

all-mtr-teg

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96Spec Ek &raquo;</TD></TR><TR><TD CLASS="quote">Very interesting. I am curious to see how they will work. How much are they compared to the old lma's? I need to pick some up as soon as my head is back from NRGTech.</TD></TR></TABLE>

Yeah, how much, or which dealer did you score them from?

prettylew

what about the width of the new ones? do they flop around side to side in the head??

Furyof4

Very interesting. Thank you for sharing CC.

EKhatch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96Spec Ek &raquo;</TD></TR><TR><TD CLASS="quote">Very interesting. I am curious to see how they will work. How much are they compared to the old lma's? I need to pick some up as soon as my head is back from NRGTech.

EDIT.....

$22.24 each at hondapartsdeals.com
http://www.hondapartsdeals.com...8&y=7

If anyone here can beat that price let me know.


Modified by 96Spec Ek at 12:26 AM 6/2/2008


Modified by 96Spec Ek at 12:27 AM 6/2/2008</TD></TR></TABLE>

$21.09 each at Majestic Honda assuming they are the newer style. Not sure, just looked them up for a 2000 Si.

Rocket

$22 each? That's alot of coin.

Time to break out the CAD drawing board.

prettylew

<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">$22 each? That's alot of coin.

Time to break out the CAD drawing board.</TD></TR></TABLE>

hell to the yea

4GE4YA

Isn't $22.00 still cheaper than the type r lma's?!?

fastlifemotorsports

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4GE4YA &raquo;</TD></TR><TR><TD CLASS="quote">Isn't $22.00 still cheaper than the type r lma's?!?</TD></TR></TABLE>

Yeah I agree, they are still cheaper then the ITRs LMA going for $34-39 a pop

onepoint6i

damn, good find...

Brick Top

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

Yeah I agree, they are still cheaper then the ITRs LMA going for $34-39 a pop</TD></TR></TABLE>

ya. in comparison, that's a good price. same as the older prelude's cost


Modified by Brick Top at 12:16 PM 6/30/2008

Big Teggie

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

ya. in comparison, that's a good price. same as the prelude's cost </TD></TR></TABLE>

Expensive when compared to $7 cost for the S2000 and K-Series LMA's.

not so civic

i noticed these in my '98 a4 head laying around. nice to know this info. thanks for posting this up.