VW Drag Racing Piston Lightening

Follow along as John Edwards @ Costa Mesa R&D lightens a set of forged pistons for Robert Kong's hot Karmen-Ghia drag machine.
www.engine-machining.com

Category:

Autos & Vehicles

Tags:

• vw
• drag
• racing
• race
• quarter
• mile
• engine
• rebuilding
• machining
• pistons
• lightening
• piston
• haul
• ass
• dude

[paky66]

so, how did it do on the track?

[fiatnutz]

@paky66 - This was for a client at my shop.

[localvic]

If you want things done right, you have to do it yourself.

[badVWbug]

Yes, it is only to reduce the weight of the piston. (Imagine the crank it is connected to, when the piston (actually connecting rod it is on) pushes down on the crank, the crank rotates, then has to use its momentum or another piston's downward force to push the piston back up. When U look at it like this, it's easy to see why you would want that piston to be as light as possible. I also gave you a thumbs up to even out the negative one sumone gave you. U asked an honest and fair question :)

[Infernostar18]

looks like those jaws are off a lathe, am i right?

[dslandrey]

it doesn't have to get hot... you must do heat treatment to every part after a machining process in order to take the stress that you have put into the grains. You can't machine a part, withoung puting stress into its grains.

[zapwatt]

@dslandrey I don't think there is anything to "quench". The work piece (piston) did not get hot during this machining.

[alvin82ng]

skim it n soften it, not a wise way, like killing ownself,

[paky66]

@fiatnutz i understood that from the start, but i thought you got some feedback about how did the car perform

[barthoedemaker]

@TannerDee F1 has

[batboyboogie]

@JGMagoo why not? No problem if you know what you're working with

[dslandrey]

Βy machining the piston, you are puting a lot of stress to the metal...(inside the crystal structure) because you change the shape of the surface grains... To correct that you need to quench that piston in order to lose all that stress and for the grains to become as in the beggining... (sorry for my english if you don't understand anything... i study mechanical engineering in Greece)