racing crankshaft

[Dave cook]

It says this beast has a ''Renn'' Crankshaft

[Mark Halligan]

1 Kg makes a big difference when the engine is accelerating, basically it means that more of the power produced will be available to accelerate the car as opposed to the crankshaft itself

Yep Paul, according to my 'favourite engine book' - "a single ounce of metal (28 grams) has a dynamic weight of over 700 pounds when it's placed on a rapidly turning crankshaft counter weight".

I wonder how quickly a badly balanced motor would shake itself apart?

[Audi Parts Guru]

Yep Paul, according to my 'favourite engine book' - "a single ounce of metal (28 grams) has a dynamic weight of over 700 pounds when it's placed on a rapidly turning crankshaft counter weight".

I wonder how quickly a badly balanced motor would shake itself apart?

So what's your favourite engine book called then Mark

[volcano rs]

how much weight was taken off that crank in the first pic the one thats knife edged ?
mark .

[Henka]

The text above the picture says 1kg.

[volcano rs]

sorry henka was too busy just looking at the pictures

[Mark Halligan]

So what's your favourite engine book called then Mark

This month I will be mostly reading 'Engine Blueprinting' by R. Voegelin.

The text above the picture says 1kg.

I must admit to weighing it on bathroom scales, so thats an approximate kilo

[garym]

crank

spoke to farndon had thier cranks before i dont kile them that much there are better speaking to doug kiddy he makes them for f1 and they look the biz as to the other responces the crank is for my spare sport engine and the rpm is what i want just came back from italy and rpm telltale says 9200 rpm we dont have the high gearing of road cars so have to hang on sometimes for top speed but thanks for the info the pics of the crank from germany looks good but we will see what kiddys say thanks gary

[volcano rs]

is this crank for another engine build then mark ?

[Mark Halligan]

Yep

[volcano rs]

not the same crank i saw at sals ?

[Mark Halligan]

not the same crank i saw at sals ?

Yep thats the one

[volcano rs]

you know what i've got one lying around ,might do the same want to see how yours performs first .

[caterpillar]

try oettinger in germany. i have a custom made one.

[aelred]

Mark, I got one done by the same person and according to the famous bathroom scales I gained or should I say lost 2.5 Kg and had a 3B flywheel loose 4.5 kg.

I know Phil was not to happy with the crank as there was no meat left for the balancing.