440 vs 360 Weight Analysis.

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Dusty 997

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Since in my own research i never really found as much specific in depth info as i was wanting i thought id do it myself and post the results.

We all know the age old debate of weight vs power big block vs small block ext.



Per google:

A fully dressed Mopar 440 big block, including cast iron heads, intake, accessories, and fluids, generally weighs around 670-700 lbs

A fully dressed Mopar 360 LA Small block, iron block/heads, intake, exhaust, carb, alternator, water pump, etc. weighs approximately 550 to 600 lbs


These figures may or may not be exact/accurate, since I dont have a way to get the hard data on these #s specifically im just using them as a general base line.

So its pretty safe to say a 440 weighs about 150 lbs more than a small block 360.


Using that data as a base line, the question becomes, in a casual street application can you realistically throw enough light weight aluminum parts at the Iron Goat to make it to where its close to or no heavier on the front nose than the car would have normally been from the factory with a small block thus Nullifying the detrimental handling aspects 100-150 pounds on the nose would create.

What we're not here today to argue us the "well if you throw the same aluminum stuff at a small block itl be even lighter" argument. My goal is just Can i run the 440 without making the car handle any worse than it already does now/did from the factory.

So after disassembling the 440 ive started weighing various components that i know light weight aluminum versions exist for. as i buy the parts ill weigh the new parts and plug all the data into a spreadsheet showing the weight savings of each part and see if we can hit a total of somewhere around 100-150 lbs off the nose :D

Heres the first bit of data for the thread. Please note, on the engine drive pulleys and brackets i dont have a photo of them on the scale because i had weighed them prior to deciding to do this post and they have since been sold though the data is present in the current chart.

Ill come back to the thread and continue to update the #s as i get more parts in hand.

Charts.jpg


water pump.jpg


intake.jpg


manifolds.jpg


heads.jpg
 
With the use of lighter weight aluminum parts (if available), a big weight reduction is possible. For example the early Hemi (57/58 392cu in), comes in about 737 lbs. Hot Heads dropped that weight to 497lbs with aluminum heads, intake and front water pump crossover and water pump components
 
I say it like this. If you had two small block Dusters, one was manual steering, manual brakes, and no A/C, and the other had those three options, would you ask "hows it handle with A/C, PB's and power steering???" Nobody asks, yet it's about the same weight difference.
 
Let's add an Indy low deck aluminum block to this equation.
The entire engine 475- 500#'s. lol
 
Not just the engine to lighthen suspension weight. Light weight Master cylinder, Manual alum. steering box in place of heavy power box and pump.
 
Stock for stock about 150 pounds difference. Aluminum for aluminum parts, about 150 pounds difference. I mean seriously, this has been beat to death.
 
Stock for stock about 150 pounds difference. Aluminum for aluminum parts, about 150 pounds difference. I mean seriously, this has been beat to death.

Exactly my point.

The big block guys want to say they can get the weight of a big block down to small block weight.

Just stupid.

And when spring gets here it will come up again and be equally as stupid.
 
I'm surprised how many of these guys autocross or road race... I never had a big block car that couldn't go around a corner.. I am a bit in love with small blocks now though.. soo much easier to work around being smaller.
 
I read that.

But, this is the same argument that gets repeated over and over and over.

No matter what you do, the big block will always weigh more than a small block.
yes, and [blank heads] will make more power than [blank heads]. and solid roller is better than HFT. and green bearings are ****. and everything needs a 1050 dominator not a 650 AVS.

and on, and on, and on.

but...

*whispering*

not the purpose of this thread
 
yes, and [blank heads] will make more power than [blank heads]. and solid roller is better than HFT. and green bearings are ****. and everything needs a 1050 dominator not a 650 AVS.

and on, and on, and on.

but...

*whispering*

not the purpose of this thread
isn't the true purpose of any thread here to get derailed instantly and devolve into inane arguments about points that have been proven or disproven decades ago?
 
Well sure the big block will weigh more if we're comparing iron to iron or aluminum to aluminum. But that gap can be almost closed comparing an aluminum dressed big block to an all iron small block. So the real answer is "it depends".

That said, if you cannot tune for an extra 150 pounds, you might wanna give up the car hobby.
 

what people should be doing is moving the engine back a few inches to help with balance.. that would give better handling than a bit less weight..
 
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