Weight of 305 stock rods and pistons ?
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Joined: May 2005
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From: San Diego, CA
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
Weight of 305 stock rods and pistons ?
How much do
1) The stock (5.7 correct ?) conencting rod weigh ?
2) The stock 305 piston (for the L03) weigh ?
1) The stock (5.7 correct ?) conencting rod weigh ?
2) The stock 305 piston (for the L03) weigh ?
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Joined: Sep 2001
Posts: 6,111
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From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
Sort of like asking " What's a Hen-way?
Some things you just have to measure for yourself.
Some things you just have to measure for yourself.
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Joined: Aug 2005
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From: Yellowknife, NWT, Canada
Car: 84 Z28
Engine: 357
Transmission: TH-350C
Axle/Gears: 3.43
Their was probably quite a variance in weight over the years so grab yourself a gram scale the next time you have the parts in hand.
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Re: Weight of 305 stock rods and pistons ?
Originally posted by vorgath
1) The stock (5.7 correct ?) conencting rod weigh ?
1) The stock (5.7 correct ?) conencting rod weigh ?
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Joined: Nov 2004
Posts: 252
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From: Saskatchewan
Car: 84 Z28HO
Engine: 350 summit block
Transmission: T5
Axle/Gears: 3.73 10bolt
Re: Re: Weight of 305 stock rods and pistons ?
Originally posted by firebirdjosh
Stock can either be 5.0 or 5.7 if you are talking about a V8 in our cars. You have a 5.0 if you have a 305.
Stock can either be 5.0 or 5.7 if you are talking about a V8 in our cars. You have a 5.0 if you have a 305.
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Re: Re: Re: Weight of 305 stock rods and pistons ?
Originally posted by Zed'er
I believe he's talking about the rod length, not the liter size of the engine.
I believe he's talking about the rod length, not the liter size of the engine.
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
He's talking about the length of the connecting rod. All factory SBCs have 5.7" rods, except 400s which are 5.565"
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Thread Starter
Supreme Member
Joined: May 2005
Posts: 1,701
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From: San Diego, CA
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
*shrugs* So I assumed people knew how much their internal engine parts weigh
And yes ... of course I was wondering about the 5.7 INCH connecting rods
And yes ... of course I was wondering about the 5.7 INCH connecting rods
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Joined: Jan 2000
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Well I know how much my rods weigh, but I don't know anything about the weight of anybody else's.
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Joined: Aug 2005
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From: Yellowknife, NWT, Canada
Car: 84 Z28
Engine: 357
Transmission: TH-350C
Axle/Gears: 3.43
Give your local GM dealer a call, they should have specs on the parts.
As for my rods weights, only ***(why is g0d sensored?) knows and they are probably all different weights
As for my rods weights, only ***(why is g0d sensored?) knows and they are probably all different weights
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Joined: Jan 2000
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Originally posted by 84z28350
why is g0d sensored?
why is g0d sensored?
Last edited by Apeiron; Oct 13, 2005 at 07:14 PM.
Thread Starter
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Joined: May 2005
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From: San Diego, CA
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
I simply wanted to have it for some calculations .. i.e. .. how much weight one could save (if one would even save) by going to lighter rods .. maybe 6.0 length .. and light hyper(ah heck 
I give up on spelling that one) pistons
I give up on spelling that one) pistons 
Joined: Mar 2000
Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
I have an '86 LG4 shortblock and '87 LB9 shortblock sitting in the garage. The '86 has X rods, the '87 some lightweight thing. I haven't taken either apart, but if I had to guess, I'd guess they weigh about 20-30 grams different from each other.
Of course, to date I've had absolutely no incentive to take either apart to find out how much they weigh.
Of course, to date I've had absolutely no incentive to take either apart to find out how much they weigh.
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Oh, the pink rods in my ZZ3 shortblock weighed 604-608 grams with caps, bolts, & nuts prior to balancing.
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