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What will my car weigh


slngsht

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For those of us who didn't start with a new kit, or build from scratch (well, in my case, nearly :lol: ), it's rare to have a chance to weigh everything as the car is put together. So I'm going to do my best to document how much the various components weigh as I put them in. I will do my best to estimate the weight distribution of each component using distances to front / rear suspension axis...

 

When the car is done, I will go in for an official weigh-in and corner weight.

 

Engine / tranny is weighed complete with headers, intake, full accessories, oil, fuel lines and fuel pump, all harnesses, including dash and chassis harnesses, ECU, fuse and relays, headlights, complete motor mount and cradle. Literally, it can be hooked up to the gas tank and battery and be fired up as it sits on its cradle on the floor - so there will be no cheating on the engine weight. I promise. :)

 

So... post up your guesses for my final weight and front / rear bias %.

 

NOTE: Items with * next to them are estimates at this point.

 

For those new to the forum, I have an X-Rotus, powered by a LS1 V8, T56, camaro rear axle.

 

Starting off with the chassis:

 

Component / Total Weight / Front / Rear / % rear

 

 

Bare Chassis / 219 / 59 / 160 / 73%

Rear Axle / 215 / 0 / 215 / 100%

Rear Wheels (both, with tires) / 100 / 0 / 100 / 100%

Front Wheel Assemblies / 230 / 230 / 0 / 0%

Rear shocks and springs (both) / 14 / 0 / 14 / 100%

Seats / 13 / 2. / 11 / 83%

Steering Rack / 10 / 11 / -1 / -10%

Steering shaft / 10 / 6 / 4 / 40%

8 Gallon tank and bracket (with 8 gallons of gas at 6.2lbs) / 60 / -8 / 68 / 113%

Side skin (both) / 22 / 11 / 11 / 0.5

Nose cone / 13 / 15 / -2 / -12%

Floor* / 40 / 20 / 20 / 0.5

Engine / Tranny / 706 / 409 / 297 / 42%

Battery / 36 / 4 / 32 / 89%

Driveshaft / 10 / 8.2 / 1.8 / 18%

Interior panels* / 1 / 0.5 / 0.5 / 0.5

Seat belts* / 4 / 2.5 / 1.5 / 0.375

Radiator* / 15 / 17 / -2 / -12.6%

Fastners* / 10 / 5 / 5 / 0.5

Hood* / 10 / 7 / 3 / 0.3

Back Panel* / 8 / 9 / -1 / -12.5%

 

 

 

----------------------------------------------------------------

Total So far / 1745 / 808 / 937 / 54%

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Well, we know it won't qualify as a Superlight.:D

 

I'll guess 1826 pounds :eek: with 56/44 front to rear ratio. :leaving:

 

Tom

 

 

I might as well put my guess out there too...

 

I'm guessing 1650 lbs 47/53 front to rear. Aim high :lol:

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Mazda, will this be a wet weight with fluids? 1650 will give you a really nice P/W ratio. Tom

 

I will weigh it with all fluids, including 8 gallons of gas, but not me in the car.

 

As a data point, when I first did the LS1 conversion, the car weighed 1700 lbs with a few gallons of gas. Since then, my wheels are larger and heavier, rear axle is changed (not sure about the weight difference), roll structure is heavier, dash structure is heavier.

 

On the plus side, fuel tank is smaller and lighter, headers are lighter than the cast iron exhaust manifolds.

 

 

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updated rear axle ,rear wheels / tires, front wheels.

 

Front wheel measurement includes wheel, tire, rotor, calipers and pads, flex brake line, upright, lower and upper Aarms with heims, spring and shock. Does not include steering tierod.

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You should do a contest. Let everyone guess a weight whom ever is closest get a ride in the beast at the National event.:)

 

I am guessing 1685 dry.

 

If we have an autocross, whoever has the closest guesses can drive her for 2 runs in the autocross - provided I have seen this person drive.

 

2 runs for the person with closest guess on total weight.

2 runs for the person with closest guess on weight bias.

 

You can adjust your guesses until I post the engine / tranny weight. Once that's done, any post edited after that time will not count :)

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If we have an autocross, whoever has the closest guesses can drive her for 2 runs in the autocross - provided I have seen this person drive.

 

2 runs for the person with closest guess on total weight.

2 runs for the person with closest guess on weight bias.

 

You can adjust your guesses until I post the engine / tranny weight. Once that's done, any post edited after that time will not count :)

 

 

why hello thAr! ur beta tester numba 1 has arrived.

 

1704 #s, 48/52 f/r distribution.

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Engine weight is posted... Looks like Bruce and Sean are closest on weight so far, and Box is closest on distribution.

 

Still have mufflers to add too... once I figure out what to do there.

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The what?

 

:lol:

 

Mazda,

 

You know that thing that you are susposed to look through:d :jester: and keeps bugs from getting stuck in your teeth when your smiling as you drive Franklin 7.

 

PS: New my engine is now in the shop and will be going in to the 7 in the next couple days so I will be back on the road again.

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Your correct in not having my 7 running has been a drag in more than one aspect. But enough for now ans I don't want to Hi-jack your thread so I will update the one I started on overheating problems later this evening.

 

 

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