4AGE 16V crank weights

[fax0815]

Always intrested on this subject, and I just measured a 40mm bluetop crank and a 42mm redtop crank for comparision, which I thought is quiet intresting and worth sharing.

40mm crank 11,40kg
42mm crank 12,40kg

Quiet impressive to have 1kg less on the engine internals!

Fell free to add 20V weights if you got any

[Bean]

this is exactly the reason why I went with custom rods to suit the best of both worlds

[Lewy]

Im using the 40mm crank with some H beam rods i sourced through Leadworth racing should be a cool setup when done , i knew the crank would be lighter but never knew by how much thanks

[PatrickAE86]

i've measured the OEM 10:1 pistons with OEM conrods last year, but i don't know it any more

what i do remember is that the lightest one was only 4 gramms lighter than the havviest one, that's pretty nice i think

OEM flywheel weighs about 7,4 KG (200mm clutch)

[oldeskewltoy]

PatrickAE86 Wrote:i've measured the OEM 10:1 pistons with OEM conrods last year, but i don't know it any more

what i do remember is that the lightest one was only 4 gramms lighter than the havviest one, that's pretty nice i think

OEM flywheel weighs about 7,4 KG (200mm clutch)

lighter (over 20 grams ) still when you replace the original pins...



may not seem like a lot... but the pistons and pins, going up, going down, starting, stopping... the mass on each rod, piston and pin is far more substantial then a kilo in the crank which is only rotating and has no starting/stopping to deal with

not entirely true because of torsional loads on the rod journals... but the crank never has to start, and stop repeatedly thousands of times a minute

[Bean]

what was the weight of your custom pins Dan? I'll have to borrow some proper scales and weigh my JE ones and everything else I have. Will make a good resource for other and us.