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-   2nd Generation Specific (1986-1992) (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/)
-   -   Steel VS. Aluminum Hood? (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/steel-vs-aluminum-hood-585753/)

Node 10-10-06 01:22 AM

my t2 came w/ an aluminum hood
I'm happy w/ it


one way to tell is that steel hoods have the hood latch on the front/bottom of the hood welded (think its spotwelds) and teh alum hoods have rivets


<3 alum t2 hoods

Rob XX 7 10-10-06 06:09 AM


Originally Posted by rocket859
Also saying if you really want a weight difference “WITH” carbon fiber “YOU” would have to get fenders and a front bumper is true but also a farce. Mainly because that would be saving about 200 LBS on the front end alone, while replacing an aluminum hood with paints with a carbon fiber hood depending on maker you can save 10 lbs, witch is a lot of weight to someone who is trying to save it.


was that 200lbs meant to be the farce statement?

calrx7 10-10-06 06:28 AM


Originally Posted by rocket859
Not to be a grammar Nazi. Id just like to say that barely any difference would be a couple of ounces, aluminums Atomic Mass is 29.2 AMU while Carbon Fibers mass is less than half that at 12.017 AMU. Also saying if you really want a weight difference “WITH” carbon fiber “YOU” would have to get fenders and a front bumper is true but also a farce. Mainly because that would be saving about 200 LBS on the front end alone, while replacing an aluminum hood with paints with a carbon fiber hood depending on maker you can save 10 lbs, witch is a lot of weight to someone who is trying to save it.

Also size and weight of the car is a nice variable, youd be trying to keep weight on the rear and front as even as possible for autocross. Mainly keeping your steering radius as tight as possible.


Seeing as this is the “Technical” forum lets try to save the AIM Jabber for AIM and use real words instead of trying to figure out everyone’s way of saying you and with.
- Pete

:offtopic:

U NAZI!!
how U gonna tell me to change the way i type my shit.?
"keep the aim jabber on aim" LOL funny man.
technical or not u aint gonna stop me so dun even homey.
this isnt english class, its a forum. what are u gonna do? give me a F? BAHAAHAHAHAHAHHAHAAH

"..... figure out everyone’s way of saying you and with."
U obviously figured out what those letters meant so whats the problem? no one else is havin a problem WID it.

o yeh btw, it isnt the grammar homey, its SPELLING

peace out

-jimmy

:offtopic:

That Rx-7 kid 10-10-06 03:32 PM

^dont u mean "homie," or is it really spelled "homey"? lol jus kiddin :biggrin:

and Rob- thanks you should know what hood i have, considering i bought my 7 from you- i shudda just asked lol thanks

jgrewe 10-10-06 06:37 PM

Back on topic... The hood is the only real place to save weight in front with removable body panels. The nose weighs very little, actually about the same as a f'glass piece. The fenders are about the same in steel or f'glass. My f'glass hood weighs about 15-16 lbs but it is held on by pins.

AbortRetryFail 10-10-06 06:43 PM


Originally Posted by rocket859
...aluminums Atomic Mass is 29.2 AMU while Carbon Fibers mass is less than half that at 12.017 AMU...

Doesn't density factor in here someplace?

riverzendz 10-10-06 06:47 PM

My 87 TII has a steel hood. It also had a replaced drivers side fender. Rob, you made a comment about cheap, steel, replacement TII hoods. Makes me wonder.

The hood does have the factory stickers though.

Rob XX 7 10-10-06 09:05 PM

I have factory stickers on my hood as well, they cost nothing.
You can try to look for a aftermarket stamp in the steel itself, like YBC or whatever the heck the letters are.

Sideways7 10-10-06 09:31 PM


Originally Posted by jgrewe
Back on topic... The hood is the only real place to save weight in front with removable body panels. The nose weighs very little, actually about the same as a f'glass piece. The fenders are about the same in steel or f'glass. My f'glass hood weighs about 15-16 lbs but it is held on by pins.

Yeah, but you circuit race, which is the only time the weight savings of a lighter hood are actually worth it. I was speaking about people that drive their cars on the street and don't competitavely race them.
And to riverzendz, if it has factory stickers, then it is factory. The aftermarket replacements shouldn't have them on it. It is possible that it was replaced at one time, and they used a steel hood since it was cheaper, though.

rjpbboi 10-10-06 09:33 PM

You can usually tell by just lifting the hood. If yours is heavier than you want it to be, chances are you can find a lighter one somewhere.

Rob XX 7 10-10-06 09:38 PM

sideways- I have a aftermarket replacement hood, I bought the decals from the dealer when I replaced it, cost nothing for the decals

My5ABaby 10-11-06 07:15 AM

As said before, just get a magnet and see if it sticks.

Tiderfish 10-11-06 10:55 AM

w0000t I checked last night and I have rivets! Best part is I was all set to get an aluminum hood from a junk yard and have it painted, etc. I was swapping out the FTP lenses and i looked up and saw the rivets! I guess it doesn't matter I have a vert, so every pound removed helps.

NOPR 10-11-06 11:40 AM


Originally Posted by Tiderfish
w0000t I checked last night and I have rivets! Best part is I was all set to get an aluminum hood from a junk yard and have it painted, etc. I was swapping out the FTP lenses and i looked up and saw the rivets! I guess it doesn't matter I have a vert, so every pound removed helps.

all verts have aluminum hoods.

Rob XX 7 10-11-06 11:41 AM

aftermarket steel hoods have rivets too

Tiderfish 10-11-06 01:58 PM


Originally Posted by NOPR
all verts have aluminum hoods.


Neeto! Guess they realized the vert was waay too heavy!

Matt|ttaM

Rob XX 7 10-11-06 02:04 PM


Originally Posted by NOPR
all verts have aluminum hoods.

Verts HAD

unless it was changed over the years, I picked up a vert that does not have one, probably lost a long time ago and replaced with a easier to get steel unit

KeloidJonesJr. 10-11-06 02:05 PM

Trust me, you WILL know the difference no matter what.

NOPR 10-11-06 02:44 PM


Originally Posted by Rob XX 7
Verts HAD

unless it was changed over the years, I picked up a vert that does not have one, probably lost a long time ago and replaced with a easier to get steel unit

hahaha, good point.

My5ABaby 10-11-06 02:58 PM

Damnit, just use a fucking magnet. :wallbash:

Rob XX 7 10-11-06 09:43 PM

the author of the thread now knows what hood he has, no magnets needed

slpin 10-12-06 02:07 AM

he states he has a 91 na coupe
its steel

its probably better, i let a few girls sit on my hood and well, it isnt perfect anymore

SSRx7 10-13-06 12:07 AM


Originally Posted by rocket859
Not to be a grammar Nazi......you can save 10 lbs, witch is a lot of weight to someone who is trying to save it.

- Pete


Sorry Dude, gotta call ya on your own game, I think you meant "which", not "witch".

Or maybe because it is getting close to Halloween?..... ;)


Just to stay on topic, My vert hood is aluminum. The good on the FB is smaller and a lot heavier, steel.


Later,
Bill

riverzendz 10-13-06 07:22 AM


Originally Posted by slpin
he states he has a 91 na coupe
its steel

its probably better, i let a few girls sit on my hood and well, it isnt perfect anymore

Hopefully it was worth it and they were scantily clad, or even better, not clad at all!

ericgrau 10-14-06 12:55 AM


Originally Posted by My5ABaby
Damnit, just use a fucking magnet. :wallbash:

+1

Could still have rivets on aftermarket hood.


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