You are reading a single comment by @Dammit and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@Dammit
As a one-off, really expensive. I'm lucky to be doing this with a friend, and we're sharing the costs.
However, in volume these will get much cheaper - and there's potentially decent demand (context: decent demand here is relative!) from others rebuilding their engines.
The one in the pictures is, unfortunately, scrap - but pretty scrap. The tool-path was, erm, sub-optimal, so it can't be used in production. There's already a new billet bolted to the deck in the 5-axis for the new one, waiting on us building up a head with the scrap unit to check tolerances etc.
This as-yet un-machined one will go into a race engine for testing over winter - we'll pull it out in spring and see what it looks like.
Bear in mind that this one is for hydraulic lifters - it's a drop-in replacement for the Porsche one.
The ones for my engine will be modified further for mechanical lifters, so we ill end up with two different designs (if the new lifters are a different size).