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Old 03-03-2010, 01:19 AM   #31
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Wiki says 6.175 lbs. per gallon.

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Old 03-03-2010, 01:37 AM   #32
Knows a couple things...

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So far as aircraft weight & balance calculations go, gas is calculated at 6 lbs. per gallon & engine oil is 8 lbs. per gallon. Water is slightly over 8 lbs. per gallon.

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Old 03-03-2010, 02:03 AM   #33
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Gee, I always though gas had a variable weight.

I had to carry a gallon about a mile when my girlfriend ran out of gas. It may have been 8 lbs when I started, but when I got there it weighed about 500 lbs.

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Old 03-03-2010, 05:48 AM   #34
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I run a V8 and still do everything I can to keep it as light as possible. Synthetic winch line can save you a bunch of pounds. I take the hard top and doors off as soon as I can make it to work and back without freezing the twins.
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Old 03-03-2010, 10:59 AM   #35
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If you just want to remove weight.....look at dragsters and Nascar. They start with the frame. And what they do is drill holes (large holes 1-2") in the frame in rows. They remove as much of the frame as they can without undermining the strength needed. I don't know if you want to go this far.
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Old 03-03-2010, 11:04 AM   #36
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Quote:
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Gee, I always though gas had a variable weight.
Gas does have a variable weight, gasoline doesn't.
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Old 03-03-2010, 11:27 AM   #37
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Gasoline does espand with temperature, but that is not going to help Stephan drop the mass of his TJ!

Lighter wheels can make a big difference. Has anyone tried tall skinny tires? Does anyone make them any more?
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Old 03-03-2010, 01:56 PM   #38
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tractor companies make tall skinny tyres haha
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Old 03-03-2010, 02:02 PM   #39
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You could always inflate the tires with helium.
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Old 03-03-2010, 02:43 PM   #40
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You could always inflate the tires with helium.
hmmm.....
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Old 03-03-2010, 03:08 PM   #41
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Does anyone make a carbon fiber or light weight aluminum roll cage? You caould also look into light weight glass replacement. look at lexan or something
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Old 03-03-2010, 06:44 PM   #42
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The roll cage is something I wouldn't want to mess with...
carbon fibre/aluminum hood, however, would be an option.
I may just mold my own fibreglass hood
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Old 03-03-2010, 08:18 PM   #43
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Sooo many ways to lighten a vehicle. It boils down to personal preference and budget which ones are going to work for you. These are general ideas for any vehicle, not just jeeps.

Interior:

- Remove carpet, floor mats, etc.
- Remove stereo, speakers, amps, etc.
- Remove paneling, padding, or insulation that isn't needed.
- Purchase lightweight racing seats for front.

Engine bay:

- Light weight battery
- Remove air conditioning (that alone will save over one hundred pounds)
- Replace exhaust manifolds with headers.
- Replace exhaust system with a lighter aftermarket one. (no cats, etc)

Exterior:

- Purchase lightweight replacement panels such as hood or tailgate.
- Lightweight bumpers, or just remove bumpers.
- Remove doors, or other panels that are not needed.

More extreme ideas:

- Go through engine bay, interior, and under carriage and replace brackets with zip ties.
- strip down all wiring harnesses of excess tape and loom.
- Go through engine bay, etc and remove any heat shields, insulation, etc.
- Replace transmission with a lighter, custom racing trans
- Purchase custom aluminum driveshafts. (May not be a good idea in a jeep)

Literally any vehicle can lose between 500-1000 punds by stripping items off. You have to be willing to make sacrifices though! Every ounce counts! If you save a pound in a hundred places it's a hundred pounds!

There are other ideas I forgot to list, but I'm tired right now, and having a few beers.
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Old 03-03-2010, 08:53 PM   #44
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I'm looking into some of the racing seats, but i'm not sure as to how much they'll run me and how much they'll cost
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Old 03-03-2010, 09:04 PM   #45
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anyone have some good racing seat ideas?
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Old 03-03-2010, 09:22 PM   #46
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Quote:
Originally Posted by Stefan View Post
anyone have some good racing seat ideas?
good or cheap? pick one.

Edit:

I'm feeling these:

http://www.quadratec.com/products/24226_X0X0_PG.htm

I had a set in a past life. They are comfortable but they are not adjustable. If you are overweight, they will not work well. The price is reasonable, and they should save some pounds.
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Old 03-03-2010, 09:32 PM   #47
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hmmm...
a mixture of both...I mean
I want something durable, but nothin extremely expenive
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Old 03-03-2010, 11:57 PM   #48
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A guy here in Germany which runs a very reputable 4x4 shop won a lot of european offroad competitions in his 4banger TJ, stripped from every unnecessary part and he has drilled like 600 holes in his rig to save weight. Sure, the turbo and his driving skills helped a lot, but he just drove up obstacles where others in heavier rigs had to winch.

Then he built himself a buggy - modified Avalanche chassis, alumininium axles, custom built winch, custom Atlas, aluminum radiator, carbon seats, carbon diff cover, even light cabling from Formula 1 cars - he got some of the big companies in the 4x4 industry built him custom products. Everything topped of w/ a nice Callaway corvette engine...hmmm....

You can find a video in german about the rig here:
Superbuggy (Video)
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Old 03-04-2010, 01:37 PM   #49
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hast du ein photo von der TJ?
oder was ist das URL fur den 4x4s shopp?
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Old 03-04-2010, 01:40 PM   #50
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I think that making our rigs lighter is going to become a new issue for many of the companies currently making products for us. Hopefully ,in time, the shops will see the benefits of making things lighter.
For one thing, I've been looking into taking the dimensions from my congocage by KargoMaster, and remaking a rack exactly like it...only out of aluminum. And possibly making the crossmembers up top of the rack more aerodynamic (by making them flatter or ovular in shape)
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Old 03-04-2010, 01:43 PM   #51
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and as for that Helium in the tyres idea, that seems like a good idea...but, no matter what gas is put in the tyres to fill them, there will need to be the same PSI which just means, more helium would need to be compressed to equal the same PSI #'s
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Old 03-04-2010, 01:44 PM   #52
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PSI=pounds/inch^2

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aluminum hood , flat fenders , heavy tj , light tj , weight

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