starkyreddc

I have seen this done many times with old school muscle cars and I am fully aware that the structure of a honda is completely different. But I am just tring to get some insight to see if this is being done with any Hondas.

Hope to get some good info out of this and not a bunch of BS.

Thanks.

civic.slow

i know ive seen A pillars drilled, and bumpers drilled, but i have never seen the actual floor/unibody drilled. i wouldnt go that far, its just sheet metal spot welded together and thats our car LOL

no real frame, oh ive also seen some random brackets and inner panels shaved down

m R g S r

before drilling the frame (i don't know what you're referring to....cuz our cars don't have any real frame, unless you mean the frame rails under the car and in the engine bay???) i would cut the complete insides of the doors out so there is just a skin on the outside....don't do that with the metal inside the rear quarters however...it would make for some very un sturdy stuff

9bells

Keep this in mind:
Anything that is between the front and rear suspension mount points are quite important.
Areas outside of these points are considered dead weight by most standards. Places to mount things, like fenders, bumpers,etc.
Pick your battles and prioritize.

CSaddict

Maybe you should look into some dimple dies.

ImportHatch

Like said above you don't really have a frame you can drill holes in. A unibody is structural so I would not drill holes in it unless it was reinforced after, which defeats the purpose.

quicksilver1689

yeah i wouldnt go drill happy without doing alot of research you could really screw up the structural integrity of the car. What is the purpose of your vehicle?

Fallen86

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic.slow &raquo;</TD></TR><TR><TD CLASS="quote">i know ive seen A pillars drilled, and bumpers drilled, but i have never seen the actual floor/unibody drilled. i wouldnt go that far, its just sheet metal spot welded together and thats our car LOL

no real frame, oh ive also seen some random brackets and inner panels shaved down

</TD></TR></TABLE>

those are usually dimple dies. they're and extra sheet of metal with round dimples (makes it stronger) in em welded to the a pillar to make it stronger. you dont wanna drill out the a pillar

Mr.E.G.

a unibody frame is structural as has been mentioned but what hasnt been mentioned is that a unibody frame usually leaves a lot to be desired in terms of torsional rigidity. once a full rollcage that has been engineered for increasing stiffness not simply as a safety device has been entered into the equation the unibody becomes less significant. now that is a bold statement and it wont apply to every vehicle but generally it is accurate.

in most cases racecars have minimum weights which they have to maintain and they usually have to add weight therefore it is not so common to see large pieces of frame cut out or holes drilled into them. yet, there is certainly a weight advantage to be gained if the series permits it.

to make a long story short, once a well engineered roll cage is present certain roll cage pieces pick up the loads that the chassis pieces would ordinarily handle and the roll cage does it so much better that the chassis piece may not be entirely necessary.

i would look at the car as a point where suspension parts attach to the car and the loads that the suspension parts encounter are fed into the car. anything that isnt between the suspension points is probably not entirely necessary not including the crumple zones which are built in. im talking rigidity here not safety but i cant imagine why you would get rid fo crash protection to save a few lbs. dont screw with your safety.

we could go on and on all day with examples but it should simply be said that once the roll cage is taking the load or resisting the twist that part of the frame can probably be reduced in mass and strength to some degree.

just to keep yourself entertained, check this out:

http://www.sportcompactcarweb.....html

the page i linked you to is midway through the article. staret at the beginning it's worth the read. the thing to notice in th pic i linked to is that the radiator core support has a bunch of holes cut into. it;s not a vital structural piece so they chop away at it.

it;s also worth pointing out that the s2000 comes from factory with some holes in a couple of frame pieces. that's hondas way of saying "sometimes a part needs to be lighter than it needs to be that much more strong"

mike93eh2

i think you might get some good ideas from this link if you read it all..

http://www.daleholley.com/nissan.htm

ProJectCvic

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike93eh2 &raquo;</TD></TR><TR><TD CLASS="quote">i think you might get some good ideas from this link if you read it all..

http://www.daleholley.com/nissan.htm</TD></TR></TABLE>


LOL OMG

mike93eh2

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


LOL OMG
</TD></TR></TABLE>

he asked for weight reduction and that is what he is getting

JDMCRX

iTrader: (2)

That was in sport compact was it not a few years ago.? They shed off like 1000 lbs lol

mike93eh2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMCRX &raquo;</TD></TR><TR><TD CLASS="quote">That was in sport compact was it not a few years ago.? They shed off like 1000 lbs lol</TD></TR></TABLE>


yes it was and it was 1100 lbs..

quicksilver1689

imagine what they could do to a hf crx

mike93eh2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by quicksilver1689 &raquo;</TD></TR><TR><TD CLASS="quote">imagine what they could do to a hf crx</TD></TR></TABLE>

probably get it down to 600 lbs.. anyone want to try it out??

driveahonda

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike93eh2 &raquo;</TD></TR><TR><TD CLASS="quote">

probably get it down to 600 lbs.. anyone want to try it out??</TD></TR></TABLE>

I has already been done. I am not digging up the thread though.

PBzAllan

damn thats alot of wieght dropped