92Transam

well the title says it all.

MdFormula350

facotry wise my guess would be the gta rims.

but i really have no clue.

FLYNLOW92rs

iTrader: (53)

What do the factory rims and tires weigh....

Inflated to 35 PSI anyone know????

formul8!!

My stock Formula rims weighed in at 55lbs with center cap and 255/50/ZR16 BFG's. The Ronal's on my car now weigh exactly the same.

The GTA rims are MUCH lighter.

unknown_host

iTrader: (1)

I bet you my weld pro stars weigh less 13 pounds per rim for 15x8's

92Transam

The car im buying has GTA's on it, now when I get it home in 5 days Im gona have to take off a rim and weigh it LOL.

FLYNLOW92rs

iTrader: (53)

My rims weigh 52 pounds with Nitto's.....

Plus whatever the adapter is........

jms

iTrader: (1)

When I put on my new Pep Boys Futura Ultra Z's (245/50/16), I weighed them and the GTA wheels that go on my '88 GTA.

40 pounds for the tire/wheel combo.

My 1992 GMC Sonoma stock steel wheels (215/70/14) and tires weighed 41 pounds.

jms

papaford

I used to install tires for a living.. Point is if you want to know how much the rim weighs you need to do it without the tire on it because I've seen hugh difference in weight from tire to tire that were all the same size

slow305

iTrader: (2)

I have some 3-piece 16X8 Monocoque wheels ... 15 pounds each!

Chris89GTA

iTrader: (2)

for some reason i want to say that 18 lbs sounds about right for the GTA rims alone... i am not positive... but that rings a bell for some reason... don't quote me on it though

ctandc

18lbs for the rim alone is dead on the nose. Of course that doesn't count center caps and lugs Are we being truly picky here? I know someone on this thread would have brought that up.

I plan on changing the 17" billet rims I have on my IROC now for some black GTA wheels around spring time.

I need to get the WC T5 swap done, and get the '870 ECM out and the '165 in first though.

Jim85IROC

iTrader: (2)

:sillylol: :sillylol: :sillylol: :sillylol: :sillylol:

Do you think it'll weight more if you inflate it to 40lbs?

:sillylol: :sillylol: :sillylol: :sillylol: :sillylol:


Anyway, I've got a set of 15x7 centerline magnesium wheels on my Sport coupe. They're an aluminum/magnesium blend and I'll bet the wheels are under 10lbs each. I've never felt such a light wheel ever.

panman79

I have centerline modulars on mine and my rear wheels weigh 15 lbs.

383backinblack

lol if you inflate the tire more its gonna weigh more.....but not by much

r90camarors

Make sure you change out the summer air and put in winter air. It saves weight, I promise!!!

Jim85IROC

iTrader: (2)

My centerlines are the same wheels but with holes all the way around.

Care to explain how?

FLYNLOW92rs

iTrader: (53)

http://newton.dep.anl.gov/askasci/eng99/eng99085.htm

Here is a discussion of why using nitrogen in tires can save weight, cause air weighs more....

So in theory if air has weight, the more in there, the more it will weight......

fb305svs

the amount of weight difference has to be miniscule if any at all.. not even measurable by the scale your using i would bet.

Steve

AJ_92RS

Just about every online tire/wheel business ships their wheel/tire combos out with 30-50% of air in them because their lighter that way. It saves them some money on shipping costs. I doubt it's a lot per wheel, but if you ship thousands out per year, I'm sure it adds up.

Jim...... have you ever lifted a full bottle, then an empty bottle of argon or propane? There's a difference between compressed gas/air and atmospheric pressure.

fb305svs

also remember that those bottles of argon are coming up aronf the 1500psi mark too! were talking about a tire with 35psi in it


With propane, keep in mind that its being filled with a liquid, not a gas as well

Jim85IROC

iTrader: (2)

I've lifted a full/empty compressed air tank that I use to blow up tires with. It doesn't feel any damn different full or empty.

I don't know about argon, but like fb said, Propane is in liquid form in the tank. Same deal with freon. Quite possibly the same with argon, I don't know.

I'm not disputing that a 30lb tank of LIQUID doesn't weigh 30lbs more than an empty one.

92Transam

Well thats because its so small a diff in weight no human can tell, but the ups thing sounds about right to just put less air in there, because they measure down to I dunno what measurement.

FLYNLOW92rs

iTrader: (53)

This isn't some great discussion on properties of various elements....

Air has weight........The more air in a tire.......the more it weighs.........Albert Einstein didn't have to tell us this.....

Now does it really matter when it comes to inflating to 35 or 40 PSI......NOPE....maybe a few molecular weights....

BUT, for arguements sake 40 PSI inflated tires DO weigh more then 35 PSI tires.....

383backinblack

all matter has mass, and therefore weight

air = matter

therefore, Air = weight, and Air + Air = more weight.

if you took something a bit larger like a huge truck wheel, and placed it on an accurate scale, it would should a noticeable difference from the uninflated weight.





lol no offense to this guy, but wow thats really dumb. gaseous substances are matter just like liquid, its just less dense. today, i picked up 2 100lb oxygen cylinders, 2 acetylene, and one 100lb argon.....and i dropped off the empties......theres quite a bit of difference in weight there. its easier to notice because of the density due to the huge pressure in a gas cylinder....theres more in there

fb305svs

a gas like argon, CO2, oxygen, and acetylene are all stored at MUCH higher pressures than what you would find.

Of course when you compress air, and make it more dense, the weight goes up, but most gasses at a pressure of 30-40psi will for the most part less than a ounce.

JAY87GTA

This is about an absurd arguement. Will a tire with 40 psi weigh more than one with 35? Yes. But come on! The damn manufacturing tolerances probably make a bigger difference than that 5 PSI!

fb305svs

isnt it fun to argue abotu this though???




:rockon:

AJ_92RS

And why was that dumb? It's true.

And to those who are carrying on about the propane and argon comment I made.....
IT WAS A JOKE PEOPLE!!!!!!!

I could say "that's why the earth's flat" and some of you would take that to mean I really think that and carry on another 7 day argument about it.

The joke was intended for Jim because he has a habit (although not bad ) of being sarcastic sometimes. That's all. A little 'poke fun' humor.

Nixon1

Amazing how arguments can start from the simplest, dumbest things isn't it?? Btw AJ, your Honda/Mountain Dew thing...that's great. I have to remember to tell that to my friend with a saturn..1.9 liters. Or my other friend with a Daihatsu Charade...inline 3, 1.0 liters. Thats right! 1.0 even...

tilstad

Wow, do you even keep friends with that kind of machinery? Lol, you know the saying "Friends dont let friends drive Maibutsu'x"

Oh well, to the subject, I think the main difference in weight when it comes to wheels is whether they are cast or not. The cast ones weigh alot more. Look at centerline, only billet and ... what do you call the convo pro's... stamped? not cast anyway. So if you're looking for some light wheels, just dont get cast ones and then you're set.

Nixon1

Congratulations, you resurrected a 1 1/2 yr old post.... You are the man. :hail: :hail: :hail:

tilstad

Yeah, I search alot in the forums. Is it bad to resurrect an old post? Lot of good info although it's old.

Nixon1

It's just taboo.... And it makes people like me make fun of you. Lol :lala:

tilstad

Oh, well, since you only got a 302 in a FORD!!! I guess it's me who should make fun of you, right? What's that wussy gay 302 eh? I've got 3 more inches than you! Yeah!! LOL

Nixon1

Hmm, fair enough. But can your 305 do 13.73 at 104 mph?

xpndbl3

iTrader: (5)

i can come close to that time. give me some 3.73s or 4.10s and i bet i'd beat it too.

tilstad

No sorry, I can't not at the moment. But still, I race cars where I'm at, not in the US, and over here my car is considered pretty fast, at least as a daily driver, and on the street I'm able to smoke most cars unless it's a skyline turbo or something, but there ain't much of them around, that's for sure.

I'm going to the track the 29 of June, after that I can post some real number, hoping for high 15's with better traction, as a baseline for future mods. But still, you know, hard to beat that "3 inch advantage"

Nixon1

Lol, yeah.....the 3 inch advantage.. lol Honestly that ET isn't bad for what you're working with. Those little 305's were never meant as performance platforms, so you've got more of a challenge. The reason the 302's perform is because they were meant to compete...in the later years of the third gen, they had to compete against 350's. Now THAT's a displacement increase worth counting.

xpndbl3: Well I'm still running a stock transmission with 153,000 miles. Gimme a race trans and I'll beat my own time. Whatcha got done, just out of curiosity?

My mod list is: New 302, Edelbrock Performer RPM heads, cam (220/220, .498/.498 at .050), 1.6 full roller rockers, full Cobra intake, 75mm MAF, headers, offroad X pipe, dumped Flowmaster 40's, , 4.10 posi
This combo SHOULD make over 350 hp at the fly, but right now due to the tranny it's only outputting approx. 280 to the wheels.