Weigh in

[Krait]

Due to circumstances I wasn't present during the registration process of my Cobra, hence I didn't know what it actually weighed as QT don't include this data on the rego.

So I wandered down to the local weighbridge yesterday where the guys were only too happy to oblige:

1140kg total with full fuel (70 litres say 52kg [0.75kg/l])
540kg front
620kg rear

Was a bit surprised that the rear was heavier. Might weigh again with less fuel and see how the split changes as the tank is beyond the rear axle line.

Cheers

[Rog246]

Geoff, what rear axle are you running ?
Rog

[Krait]

Originally Posted by Rog246

Geoff, what rear axle are you running ?
Rog

Rog,

Commodore IRS mechanicals with fabricated arms and uprights.

Cheers

[Towmaster]

Yeah Harrisons are usually 50/50 with an iron block V8 up front.... Alloy engines are obviously lighter..... My DRB is the same, 1285kg with me in it and half a tank of fuel, 642 front and rear... No alloy engine..

[Krait]

Originally Posted by Towmaster

Yeah Harrisons are usually 50/50 with an iron block V8 up front.... Alloy engines are obviously lighter..... My DRB is the same, 1285kg with me in it and half a tank of fuel, 642 front and rear... No alloy engine..

Good info Ash, thanks.

Based on my favourite scales my svelte like figure would bring the max up to 1235kg.

Cheers

[Rebel1]

Here is a list of WA based cars and their weight for comparison.
Mostly all with iron blocks.

Don't know if the weights include the driver though.

[Krait]

Interesting...only 3 of 14 are nose heavy. One is running a LS engine perhaps others have aftermarket alloy blocks.

Cheers

[Rebel1]

Nope, all iron far as I know.

[Merv and Sharon]

It was interesting reading this older thread that Geoff pointed out on the Radius Arms thread.

The common aspects being the +50% rear weight bias in most Cobras and the carrying weights. My iron block Harrison (ally heads, etc) was 1109kg with a full tank of fuel (no driver). It would interesting to see the Left Right balance on cars as well. After some limited experience with the corner weight scales, I wouldn't mind betting that there was a Right>Left variation as well on most cars, without the driver.

Originally Posted by Rebel1

Here is a list of WA based cars and their weight for comparison.
Mostly all with iron blocks.

Don't know if the weights include the driver though.

[Donunder]

Weighed mine last week -- 644 front, 732 rear with me (105) on board and half a tank of fuel. So that's 1376 kgs under normal running conditions. We're no lightweights but we're comfortable!

[keith 720]

My car 392 stroker windsor with alloy heads,Me in it and 20 litres of fuel.Front left 292.5Kg Front right 315.7Kg Rear left 348.2Kg and rear right 364.2.Total 1320Kg.The main thing is from F/Left to R/Right is656.7Kg and from F/Right to R/Left is663.9.This tells you that from Left to right turns it is close to neutral.Would love to be around the 1100Kg.

[750hp]

Good info from WA, Les!

Mike = 1060kg CR, Phil = 1400kg CR
How much do all those skulls weigh, Phil...?!?

Don, by the time we throw all of this into your engine bay you'll be back to 50/50 ratio:



Actually, nah... you can't have it!

[Aussie Mike]

Originally Posted by 750hp

Mike = 1060kg CR, Phil = 1400kg CR
How much do all those skulls weigh, Phil...?!?

There seems to be a fair bit of variation in the thickness of the CR body shells over time. Perhaps Ian was trying different fiberglass shops for his glass work. Mine is fairly thin in the body shell compared to many I've seen so that may be a factor. I had no carpet or creature comforts apart from seats and a steering wheel for rego so that will also account for a lot of the weight.

Cheers

[Philm]

The last time I weighed the car was at the drags, I was shocked.

I think it is a lot of things that get it there.

1. A bare Dart block is 72kgs.
2. Billet wheels, much heavier than most cast 2 /3 piece.
3. SFI scattershileld, it's made out of 1/4 inch plate.
4. Big brakes 365mm fronts, ducting.
5. Sway bars front and rear.
6. I have a fully functioning heater/demister
7. Power steering.
8. The NOS gear, extra fuel pump,extra fuel tank, reg, solenoids, plumbing.
9. The aluminium work, air filter, surge tank, windscreen washer, 5ltr catch can.

I agree with Mike , my kit was when Ian was playing arround with fiberglassing, I remember cuting the hoop holes and the fiberglass was a good 20mm thick!!!!!

Phil

[gjkrv8]

I havent weighed mine yet, been meaning to.

Phil my CR body was pretty thick at the Hoop holes as well. Also I think one of the CR guys at ShelbyFest mentioned the internal guards were a new addtion on the new chassis/body.

Will be interested to see if the new chassis makes it lighter or heavier. (I also have underbody exhaust and fake side pipes - so that will add to it)

Rgds

Gregg

[Merv and Sharon]

I believe that Robnells are a quite a lot heavier than more recent builds. They have amazingly thick 'glass. Not having (inactive) side pipes, power steering or a heater would seem to help as well. Not sure what side pipes actually weigh?

[kyleb]

My Robnell weighed in at just over 1100kg, no side pipes, but it did have the underbody exhaust for rego. I reckon the side pipes will weigh slightly less than the full exhaust !!! When I cut the holes in the rear deck for the roll bars it was about 15mm thick, so yes they are pretty solid, but bear in mind an amount of that is kevlar, although i'm not sure what the difference in weight would be if they only used glass, if any. Oh, and I do have power steering as well.

[Merv and Sharon]

True Kyle. The Kevlar would make a difference. I was very impressed with Russ's Robnell construction. Having both sidepipes and underbody exhaust would be a penalty.

[stumpeater]

My Harrison with the T56 and L98 and a 1/4 tank came in at 1060kgs, with an R33 rear end, but its not painted yet! Also weight gain between metallic and non metallic paint may be a factor.

[AC-460]

My Homebush fibreglass with custom chassis and alloy headed 460BB weighed in at 550 front and 590 rear 1140kg ...no fuel underfloor exhaust at first weigh in for rego....since then added paint an change to active side pipes ....Front of block is 380mm behind centreline of front axle custom firewall