View Single Post
Old 10-23-2013, 04:34 PM
Stretch's Avatar
Stretch Stretch is offline a shield of steel
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
Originally Posted by Simpler=Better View Post
Ham chanker. *pffft* (I'll be using that one later)

Hop on forum. They're bike guys but IIRC, a few have shops in your neck of the woods that will do stuff cheap.

Also, a backwoods lathe can be made from a drill press and power sander pretty easily. I've turned down stuff when in a pinch that way.

I wouldn't cross-drill any holes, but I might be persuaded to drill longways to remove weight.
Originally Posted by vstech View Post
do you have a dremel tool? you should be able to machine out the inner diameter of the skirt and remove 10 grams from the heavy ones.
I would not remove any material from the pin boss. but the skirt, and the crown are safe places IF they are thick.

I do have a dremel type thing - better actually a Proxon - I'm dead posh me...

...problem is there's not much I can really remove without making things paper thin.

Here are some quick spread sheet calculations.

1) Drilling 4mm diameter holes in the wall (thickness is 4mm)

2) Hacking off the lower skirt bits

I don't think this is a good idea though...

...20 grams is just too much to remove. 10 grams is pretty bad and I'm struggling to find enough metal for that...
Attached Thumbnails
Engine builders' advice req'd - removable piston weights?-estimated-number-4mm-holes-needed-remove-20g-material-piston.png   Engine builders' advice req'd - removable piston weights?-m102-nural-piston1.jpg   Engine builders' advice req'd - removable piston weights?-estimated-weight-loss-removal-piston-lower-skirt-portions.png  
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior

Don't leave that there - I'll take it to bits!

Last edited by Stretch; 10-23-2013 at 04:44 PM. Reason: Messing about with numbers
Reply With Quote