Component Weights and Dimensions

Real tech discussion on design, fabrication, testing, development of custom or adapted parts for Pontiac Fieros. Not questions about the power a CAI will give.

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The Dark Side of Will
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Component Weights and Dimensions

Post by The Dark Side of Will »

'88 front knuckle: 4# 14 oz
'88 front bearing: 6# 6 oz


Early spindle: 5# 4 oz
Caliper bracket: 2# 13 oz
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Post by FieroWanaBe1 »

I wonder how much they weigh loaded with brakes.
car.
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Post by The Dark Side of Will »

I'll get brake component weights next time I have brakes off.

I can also get control arm & ball joint weights pretty easily now, too.
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Post by V8Archie »

...
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Re: Suspension component weights

Post by The Dark Side of Will »

Numbers based on measurements of parts in hand.

84-87 rear knuckle:
bare weight: 9 lbs 7 oz
bearing pilot bore: 2.800
bearing mounting circle: 3x4.025

A-body HD hub bearing (5x115 lug pattern)
bare weight: 7 lbs 7 oz
spline: 27
mounting pilot journal diameter: 3.545
mounting bolt circle: 3x4.575 (116 mm ?)
wheel pilot journal: 2.765

2nd gen W-body hub bearing (5x115 lug pattern with integral ABS sensor)
weight with mounting bolts: 7 lbs 8 oz
spline: 30
mounting pilot journal diameter: 3.595
mounting bolt circle: 3x4.575
wheel pilot journal: 2.765

2nd gen W-body iron caliper:
mounting center: 5.039 (128 mm)
piston diameter: 2.375
weight without pads with mounting bracket without mounting bolts: 13 lbs 0 oz

Late '90's N-body aluminum caliper:
mounting center: 5.039 (128 mm)
piston diameter: 2.375
weight without pads with mounting bracket and bolts: 7 lbs 9 oz

STS aluminum rear caliper:
mounting center: 4.180 (106 mm)
piston diameter: 1.750
weight without pads with mounting bracket and bolts: 5 lbs 1 oz

3rd gen Camaro iron caliper:
mounting center: 5.455
piston diameter: 2.375
weight without pads with mounting bolts: 6 lbs 13 oz
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Series8217
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Re: Suspension component weights

Post by Series8217 »

EDIT: I don't remember how much the 88 calipers weigh, but I remember they weigh the same as the 4-pot Brembos from the Porsche 993 Turbo that are on Chris West's car.
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Re: Suspension component weights

Post by The Dark Side of Will »

The '88 caliper can't be that heavy... The Grand Prix caliper is all iron and huge and it weighs 13 lbs. I recall seeing some '88 calipers on the shelf in the shed... I may weigh one next time I'm at my parents' (well... now dad's :( ) house.

The '84-'87 front caliper without pads is 3 lbs 4 oz
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Re: Suspension component weights

Post by Series8217 »

I'm thinking of the rotors then.
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Re: Component Weights and Dimensions

Post by Series8217 »

Suspension
88 rear cradle (bare) 52.5 lbs
88 upper control arm 5.24 lbs (2.38 kg) complete with OE balljoint and rubber bushings
88 rear swaybar bracket 1.08 lbs
88 rear swaybar endlink 0.50 lbs


Exterior
Gen II headlight assembly with motor and headlamp: 7.88 lbs
'87-'88 Formula/Coupe rear fascia: 11.8 lbs

Interior
Door panel, no arm rest or door handle: 4.5 lbs
Door arm rest: 1.66 lbs
Front speaker: 1.8 lbs
Sill / lower A pillar interior trim (L shaped piece), each: 0.58 lbs
Center console storage box / armrest with 12V socket: 9.9 lbs*
Dashboard storage pocket: 0.72 lbs

* -- Some aftermarket insulation installed on the backside replacing the factory stuff, so this might be a little higher than stock.
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Re: Component Weights and Dimensions

Post by The Dark Side of Will »

284 Axles where they enter the differential side gears are 31mm x 28 spline (obviously on a 3.5mm module)

The inner CV's appear to be the standard female CV's as used on the intermediate shafts of 282's. There's a "mini-stub" axle about 3" long on the driver's side that has male splines into the side gear on one end and male splines into the female CV joint on the other end.

That may not make any sense at first, but...
Liberty told me that the male CV joint cups are very soft... like RC 26 or so.
The side gears are much harder... about RC 58.
The very short spline engagement the side gears have with the male CV joint cup is enough to twist off the shaft.
The female CV joints have much deeper/longer spline engagement.
Therefore, making that small mini-stub very hard and splining it into the female CV joint cup is cheaper than making a male CV joint cup that's large and strong enough to handle the same torque.
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Re: Component Weights and Dimensions

Post by The Dark Side of Will »

STS drum-in-hat parking brake:
Assembly weight: 3 lbs 0 oz
Actuator bolt spacing: 2.520 (64 mm)
Actuator bolt to hub cartridge center-center: 2.520 (also 64 mm)
Actuator bolt pattern to hub cartridge perpendicular: 2.165 (55 mm)
Parking brake mounting boss thickness: 1.650 (42 mm)

2nd Gen W-body aluminum knuckle:
Component Weight: 4 lbs 12 oz
Caliper mounting bolt center: 5.039 (128 mm)
Caliper bolt to hub cartridge center-center: 3.552
Caliper bolt pattern to hub cartridge perpendicular: 2.505 (63.5 mm?)

A-body HD knuckle:
Weight: 10 lbs 4 oz
Caliper mounting bolt center: 5.787 (147 mm)
Caliper bolt to hub cartridge center-center: 4.418
Caliper bolt pattern to hub cartridge perpendicular: 3.345 (85 mm)
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Re: Component Weights and Dimensions

Post by The Dark Side of Will »

BMW 188mm side gear splines: 1.161" (29.5mm?? thanks, BMW) x 27 splines (3.5mm module calcs to 30mm pitch diameter...? is 3.4mm a valid module?)
BMW 210mm side gear splines: 1.363" (34.6??) x 32 splines (also closer to 3.4mm module than 3.5)

Getrag 282 side gear splines: 1.058 ( 27mm?) x 34 spline (2.5mm module)
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Re: Component Weights and Dimensions

Post by The Dark Side of Will »

Anyone have hard numbers on a slick top roof panel vs. a complete sunroof setup and panel? Is it as much as 10#?
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Re: Component Weights and Dimensions

Post by The Dark Side of Will »

Early '90's Grand Prix 16x8 wheels with half worn Sumitomo HTRZ III 245/50-16 tires: 46.5 pounds.

C5 Corvette 17x8.5" wheels: 18 lbs
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Re: Component Weights and Dimensions

Post by The Dark Side of Will »

1988 Fiero brake rotors: 10 lbs 12 oz
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Re: Component Weights and Dimensions

Post by The Dark Side of Will »

Fiero 5x100 wheel bearing: 4lbs 8oz.
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Re: Component Weights and Dimensions

Post by The Dark Side of Will »

33 spline 5x115 hub bearing (e.g. '96 Trans Sport): 7 lbs
'96 Trans Sport knuckle: 11 lbs 8 oz
'LT1 Camaro brake rotor (11"): 15 lbs 1 oz
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Re: Component Weights and Dimensions

Post by The Dark Side of Will »

Series8217 wrote: Tue Apr 22, 2014 10:15 am Suspension
88 rear cradle (bare) 52.5 lbs
88 upper control arm 5.24 lbs (2.38 kg) complete with OE balljoint and rubber bushings
88 rear swaybar bracket 1.08 lbs
88 rear swaybar endlink 0.50 lbs
*BARE* '88 front lower control arm--no bushing sleeves, bumpstop, ball joint or sway bar link--is 7.85#
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Re: Component Weights and Dimensions

Post by The Dark Side of Will »

*BARE* 84-87 FRONT control arm: 7.7 lbs.

*BARE* '84-'87 REAR control arm: 4.3 lbs.
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Re: Component Weights and Dimensions

Post by Honest Don »

Is this a good thread for this?

87 notch aero-nose
A/C
Auto
Spare and jack gone, but I’ve only really pulled stuff out to put different stuff back in.
2/3 tank of gas and even the floormats are still in it.
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