Weight Differnce SBC vs 604 Crate

[BigBlueFord]

What is the weight difference between a small block Chevy and a 604 crate engine?

[charcoal01]

I think it's more or less 55 pounds

[MM90]

http://karlperformance.com/subCategory.cfm?subCat=907&cat=13

[RACEMAN]

Charcoal, which is heavier.

Thanks.

[Confused?]

SBC is heavier. The 604 has aluminum heads.

[powerslide]

It depends if you use a stock block or aftermarket, depends if the heads are darts, or maybe a vortec head. Light crank in the open motor? Too many variable to say exactly, but no doubt the crate is lighter, it has alum heads and it has the stock block.

[charcoal01]

Yes, sbc is heavier.

[MM90]

You can build a SBC "cast heads" lighter than a 604, but for the most part they are heavier.

[mod71m]

The 604 weighs approximately 421 pounds as supplied from GM. You will have to weigh your engine with the same components to know the exact difference. There are options out there that are similar in weight but you still can't run a spoiler...

http://karlperformance.com/subCategory.cfm?subCat=907&cat=13

[MM90]

Don't know if it did or not, didn't run it. But I know the 3" at the Tradition tightened the car up.