Rotating assembly component weight thread! Clutches, flywheels, pistons, rods, etc...

[J. Fast]

Lets build a database for this stuff and locate it all in one place... Please post up your individual component weights for clutches/pressure plates, flywheels, pistons, wrist pins, crankshafts, crank pulleys, clutch/crankshaft/crank dampener bolts... basically anything/everything attached to the crankshaft (including your crankshaft). Please make sure to note your manufacture specific piston diameter and compression ratings.

I will do my best to update the thread and create a table for everything that's out there.

Description	Crankshafts	Wrist Pins	Pistons	Rods	Rod Bolts	Clutch/PP	Clutch Bolts	Crank Pulley	Flywheel	Flywheel Bolts
AASCO Chromoly V1									5263.8g
AASCO Slide Bolt										131.5g
Tilton OT-2						5443.1g
Clutch Master V-Drive						6350.3
Clutch Master Twin-Disc Allen										136.1g
Ross 92mm 8.5:1			376.3g
Wiseco 92.5mm 8.3:1			356.5g
Mahle 92.5mm 9.0:1			335.8g
Fidanza Aluminum Flywheel TT									4762.7g
3sx Crank Pulley								771.1g
Flywheel N/A									8323.4g
Flywheel TT									9094.5g
N/A OEM Clutch / PP						5579.2g
TT OEM Clutch / PP						8164.7g
1G Crank Pulley								2812.3g
2G Crank Pulley								2903.0g
6G74 Crank (Forged)	19731.3g
Unorthodox Crank Pulley V1								680.4g
Unorthodx Crank Pulley V2								616.9g
ARP 2000 Rod Bolt					54.4g
ARP Aermet Rod Bolt					56.6g
Carrillo Pro-H Rods				543g
BC Sportsman				532g
BC 6148 Billet Rods				530g
3sx Rods				544.3g
Crower Rod Bolt					57.6g
Crower Rod				513.9g
Pauter Rod Bolt					48.2g
Pauter Rod				536.8g
6G74 Pauter Rods				581.8g
Wiseco 92mm 8:1CR			347g
Venolia 92.5mm 8.2:1CR			377g
Wossner 92mm 9.0:1 CR			368g
CP Pistons 92mm 8.5:1			390g

[mb3000]

Fidanza TT Fllywheel: 10.5 lbs
3SX Stock Sized Pulley 1.7 lbs

Didn't get the weight of my clutch/pp..

Edit: If we're doing G's (Respectively)

4762.72g
&
771.11g

[J. Fast]

Fidanza TT Fllywheel: 10.5 lbs
3SX Stock Sized Pulley 1.7 lbs

Didn't get the weight of my clutch/pp..

Edit: If we're doing G's (Respectively)

4762.72g
&
771.11g

Is that a 1G or 2G crank pulley?

[Alex3000gt]

John Monnin started a list of 3/S component weights here a while ago:

Monnin Engineering at wrenchjockey.com
http://www.wrenchjockey.com/Webpages/Weights.xls

[mb3000]

IIRC they don't give a different number for the 91 or 92+ models.

[Ray Pampena]

you cant get too hung up on the weights though.. i can make my engine parts as light as i want. its a balance act between material, weight and strength. i could definitely make my pistons and rods the lightest on the market by far but i wouldnt be able to sleep at night lol. it took me a few years to come up with parts that dont show bushing damage, bean stress, skirt distortion, ringland flex and pin boss flex while keeping a thick deck that doesnt distort. my point is, id hate to see people chase after the ligtest stuff.. then have inferior parts

[anyonebutme]

you cant get too hung up on the weights though.. i can make my engine parts as light as i want. its a balance act between material, weight and strength. i could definitely make my pistons and rods the lightest on the market by far but i wouldnt be able to sleep at night lol. it took me a few years to come up with parts that dont show bushing damage, bean stress, skirt distortion, ringland flex and pin boss flex while keeping a thick deck that doesnt distort. my point is, id hate to see people chase after the ligtest stuff.. then have inferior parts

Yes, but not everyone has the same goals. There are some people who would rather have a lighter piston ect that is stockish strength. Personally I think the people who are either building a light engine or a heavy engine should know what they are looking for, so having the information available is helpful. No such thing as too much information.

I'd really like a sub 8 lb flywheel and a 5.5" diameter clutch.

[Ray Pampena]

also, flywheels and dampers.. the heavier the better on those

[Ray Pampena]

Yes but isnt the goal to make HP?? High hp engines require the things I said in my post. If you are building a low hp engine.. what is the purpose of doing the light weight parts? To free up HP? Thats where it starts to not make sense to me

[anyonebutme]

Yes but isnt the goal to make HP?? High hp engines require the things I said in my post. If you are building a low hp engine.. what is the purpose of doing the light weight parts? To free up HP? Thats where it starts to not make sense to me

It gets more strange: we spend $1000+ a weekend to go drive in circles. Back on track, what I want is an aluminum block, light internal engine that I can spin up........even with a weaker block and internals, just by raising the TQ peak I can make the same HP with "weaker" components. Lighter internals mean less bearing stresses with same imbalance. I guess the end goal is a change in the engine's character, similar to why BMW put hollow composite camshafts in the Mini and Chevy put in Ti connecting rods in where the standard ones would do, a "light" engine just feels more responsive. Mine still feels a bit lazy even with a fidanza flywheel ect. I dunno, only point I'm making is not everyone has the same goals or thinks the best way to get there is the same. My car with 500+HP would be suicide on wheels. My car with 700+ HP would be genocide because it'd probably kill 20+ people as I pull a Alan Mcnish. I'm not the guy who has 500HP and uses 200 of them, I'm the guy who tries to use 500HP worth of car out of a 200HP car. OK, hyperbole. I'd love to have 700+ HP.

I guess what I really want is a different car, lol.