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Username Post: Head weights        (Topic#200861)
Jim.Biron 
"7th Year" Platinum Supporting Member
Posts: 2468
Jim.Biron
Age: 63
Loc: Saugerties, NY
Reg: 04-10-08
10-13-08 04:44 AM - Post#1540819    

Whats the difference in weight between a
1) SBC Aluminum head and an iron head
2) BBC Aluminum head and an iron head

Is there some site that lists these kinds of data?
What about complete SBC vs. BBC weights. (I know there are variables but maybe short block weights would be best).
Jim
www.HudsonValleyCruise.com


 
DragRacer383 
Super Senior Member
Posts: 4807
DragRacer383
Age: 6
Loc: Arkansas
Reg: 07-17-01
10-13-08 06:51 AM - Post#1540881    
    In response to Jim.Biron

I weighed one of my Dart Iron heads. 48#
I weighed both of my Pro action Aluminum heads
49#, So around 50# difference. IIRC
Later,Glen


 
craigblock 
Valued Contributor
Posts: 4008
craigblock
Loc: Ottawa
Reg: 05-22-05
10-13-08 06:54 AM - Post#1540883    
    In response to DragRacer383

  • Some other website Said:

A bare aluminum casting, less valves and springs, weighs 19 pounds, versus 44 pounds for a bare cast iron head




I bet there's a huge difference in weight between iron and aluminum intakes as well. There is a lot of weight to be saved just by using those aluminum parts.

By the way, I read recently that the fear of aluminum heads losing HP from heat loss can be totally canceled just by making the casting a bit thicker around the chambers.

I recently weighed a TH250 and lockup converter, they were 110lb and 48lb respectively.
Casting Numbers


 
HYPR 
"12th Year" Platinum Supporting Member
Posts: 10298
HYPR
Age: 62
Loc: Shaking and Burning!
Reg: 07-19-01
10-13-08 07:12 AM - Post#1540891    
    In response to Jim.Biron

  • Jim.Biron Said:
Whats the difference in weight between a
1) SBC Aluminum head and an iron head
2) BBC Aluminum head and an iron head

Is there some site that lists these kinds of data?
What about complete SBC vs. BBC weights. (I know there are variables but maybe short block weights would be best).


I remember reading in a thread that the approximate wieght difference between a SBC and a BBC was in the nieghborhood of 175-185 pounds.
For what it's worth the shipping wieght of a LS2/4L60E and all the engine accessories, A/C,PS,Alternator,etc weighs in about 75 pounds less than an iron head SBC motor alone. (found that little tid bit when I sold my LS2/4L60E combo)
Bob
http://www.cardomain.com/ride/222599
To be born a Redneck is by chance, to live as one is by choice!
Preserving the Redneck tradition one day at a time!


 
Malibu1974 
Senior Member
Posts: 596
Malibu1974
Age: 31
Loc: Ottawa Ontario, Canada
Reg: 12-30-03
10-13-08 07:41 AM - Post#1540906    
    In response to HYPR

I weight a BBC 781 head vs. an Edlebrock aluminum bare casting

781 = 80 lbs
ebelbrock = 31 lbs

I never had a chance to way the edelbrock fully assembled
Mike

1974 Malibu Classic
427 big block
4145 lbs w/ driver
7.45 @ 91.5mph 1/8 mile
11.79 @ 113mph w/ 1.61 60ft
11.05 @ 123mph on a 150shot spinning alot!

http://www.cardomain.com/ride/566156/1
http://www.youtube.com/user/74Malibu


 
bobb 
Super Senior Member
Posts: 4895
bobb
Loc: paradise
Reg: 09-05-03
10-13-08 08:44 AM - Post#1540953    
    In response to Malibu1974

depends on the iron head. there are lightweight gm heads. there are also heavy aftermarket heads like my sportsmans.
70 L camino 350 all forged,174 baby blower, g-force 5 spd, road rage suspension. Pray first before all else fails.


 
Rick_L 
Honored Member
Posts: 25632

Loc: Katy, Tx, USA
Reg: 07-06-00
10-13-08 10:54 AM - Post#1541027    
    In response to bobb

I have weighed old 50s-70s SBC heads at 42 lb each.

Aluminum is a little over 1/3 the weight of iron or steel, so if an aluminum head had the same thicknesses everywhere, the aluminum head would weigh 14 lb. But they're thicker in most places. The 19 lb estimate is a good one.

And, no doubt, the late model 305 heads will weigh less than 42 lb and the aftermarket iron ones will weigh more.

Just how close do you need to be? Closer than this, you better get some heads and put them on the scale yourself.

 
Petroholic 
Contributor
Posts: 839
Petroholic
Loc: Moses Lake, Wa.
Reg: 08-12-05
10-13-08 11:40 AM - Post#1541056    
    In response to Jim.Biron

SBC vortecs I just ordered:

47# complete except rockers.


P.S. cast iron



Edited by Petroholic on 10-13-08 11:41 AM. Reason for edit: No reason given.

 
Jim.Biron 
"7th Year" Platinum Supporting Member
Posts: 2468
Jim.Biron
Age: 63
Loc: Saugerties, NY
Reg: 04-10-08
10-13-08 12:00 PM - Post#1541063    
    In response to Rick_L

  • Rick_L Said:
I have weighed old 50s-70s SBC heads at 42 lb each.

Aluminum is a little over 1/3 the weight of iron or steel, so if an aluminum head had the same thicknesses everywhere, the aluminum head would weigh 14 lb. But they're thicker in most places. The 19 lb estimate is a good one.

And, no doubt, the late model 305 heads will weigh less than 42 lb and the aftermarket iron ones will weigh more.

Just how close do you need to be? Closer than this, you better get some heads and put them on the scale yourself.



Based on these great posta... and some other info I received how does this sound?

For BBC a pair of ALUMINUM will save about 75 lbs
Foe SBC a pair of ALUMINUM will save about 50 lbs.

Did I get that right?
Jim
www.HudsonValleyCruise.com


 
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