BB aluminum head weight savings [Archive] - Nova Tech

: BB aluminum head weight savings


70ssBB
Oct 24th, 06, 02:45 PM
I just do not seem to be able to locate the data. Any before and after weight numbers on BB motor installing aluminum heads. Also weight comparison to a SBC

Thanks

Big Dave
Oct 24th, 06, 04:30 PM
Weights are for complete engine; carb. to oil pan, with HEI distributor, harmonic balancer, and an iron water pump. BBC weighs 110-200 lbs. more than comparable SBC
BBC Iron heads 754 lbs. (685 lbs. JAN80 Hot Rod)
BBC Al heads 660 lbs.
ZL1 (Mark IV) all aluminum block & water pump 501 lbs.
BBC Component weights:
Cast Iron head bare 61 pounds
Cast Iron head w/valve train installed 64 pounds
'077 Aluminum head bare 27.5 pounds
Dart Aluminum head bare 38 pounds
Dart Aluminum head w/valve train installed 42 pounds
Aluminum intake manifold 24 pounds
Forged GM crank 71 pounds
Water pump (cast iron) 13.5 pounds
Vibration Damper 15.5 pounds
Camshaft 10 pounds
Steel Valve Covers 3.5 pounds

Physical Dimensions:
Front of water pump pulley to rear face of block 29.00
Overall width without exhaust manifolds 22.00
Overall width with OEM exhaust manifolds 27.00
Top of valve covers to bottom of oil pan 23.50
Top of carburetor air horn to bottom of oil pan 29.50
Overall clearance* from front of water pump pulley to firewall 30.50
*(either side valve cover interference or distributor clearance)
Push Rod Length 8.280/9.252"


SBC Physical Dimensions:

Weights are for Complete engine; carb. to oil pan, with HEI distributor, harmonic balancer, and an iron water pump.
SBC Iron heads 575 lbs. NOV77 Hot Rod JAN80
SBC Al heads 480 lbs.
LT1 all aluminum block & water pump 389 lbs.
Aluminum heads grow 0.004" more than iron (0.012" vs. 0.008" for iron at valve)
Deck Height 9.025"
Bore Center Lines 4.400"
Overall length (bare block) 21.750"
Front of water pump pulley to rear face of block 27.000"
Overall width without exhaust manifolds 19.500"
Overall width with OEM exhaust manifolds 26.000"
Top of valve covers to bottom of oil pan 20.500"
Top of carburetor air horn to bottom of oil pan 25.000"
Overall clearance* from front of water pump pulley to firewall 27.000"
*(either side valve cover interference or distributor clearance)


Tranmission weight (lbs) length (to rear seal) mount location from front of case

Powerglide (long shaft) 97 27.5625 20.5625"
(Chevrolet, fit-all)

200C (all) 96 27.6875"
(Chevrolet, BOP)

200-4R (all) 132 27.6875" 27"
(BOP, fit-all)

350 (6 inch tailshaft) 122 27.6875" 20.375"
(Chevrolet, BOP, fit-all)

700R-4 w/o converter 185 30.625"-30.750" 22.5"
(Chevrolet exc. corvette)

4L60E w/o converter 182 30.625"-30.750" 23.1875"
(Chevrolet exc. corvette & LS1)

400 (short tailshaft) 130 28.250"-28.375" 26.9375"
(Chevrolet, BOP)

4L80E (std. 2WD) 207 32.6875" 30.375"
(uses a 13" 65 lb. stock Chevrolet converter)

6L80E 211
(Corvette, GMC Yukon, Cadillac SST-V max 413hp - 664 lbs. ft. torque)


Borg Warner Super T-10 92
(Chevrolet iron/aluminum case)

Saginaw 4 speed 82
(Chevrolet cast iron case)

Muncie 4 speed 84.5 lb.
(Chevrolet aluminum case)

TH440T4 / 4T60 4 speed 177 lb transverse
4T60E 4 speed 186 lb transverse
4T65E 4 speed 196 lb transverse
4T80E 4 speed 296 lb transverse


Moser 60 -------- 279 Lbs
10 Bolt----------- 165 Lbs

An open rear 12 bolt out of a '70 Chevelle weighed 185 pounds, missing the passenger side drum.

9" weighs 230 pounds (Currie Fab 9 housing, Nodular case) Off of Curries web site. NOTE: No brakes (Drums, hardware or backing plates)

A Dana 60 rear end out of Road Runner with the pinion snubber and two "Big" drums complete with oil.

70ssBB
Oct 24th, 06, 05:07 PM
great data thanks, looks like an apprx. 100lbs weight savings with aluminum heads on a bigblock.

Motorhead62
Oct 25th, 06, 12:20 AM
Big Dave

A Dana 60 rear end out of Road Runner with the pinion snubber and two "Big" drums complete with oil.


Dave,

What was the weight of the Dana 60?

Thanks

Big Dave
Oct 25th, 06, 04:28 PM
Sorry, It got lost on my cut and paste. The Dana 60 came in at 287 pounds.

I try to keep up on weights for comparison. But no two heads are the same. GM's L-89 aluminum round port head weighed in about half as much as the standard production L-79 rectangular port head did. It also had a problem sealing the block with high compression slugs because the deck was so thin.