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  • Users: ZoRG
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  1. ZoRG

    Sequential ratchet

    thanks!
  2. ZoRG

    What valve seat material for Titanium Valves.

    Hi I am not in the US, but they were sent there first of to the head porter, there were no import duties on the valves, but it was before November 2004. The quality is very good. Have a look at the site : http://www.titanium-valve.com/english/index.htm, the price with shipping was around $685...
  3. ZoRG

    Sequential ratchet

    I struggle to find any good books on sequential transmissions, can anyone start me off at a good place?
  4. ZoRG

    Best Conrod Materials?

    http://www.cunninghamrods.com Had a quick look, the Russian Ti has a elastic modulus of around 139-142 vs +-114 for all other grades available, this could mean a considerably lighter rod than previously possible.
  5. ZoRG

    Best Conrod Materials?

    The forged ones are 4340 chrome moly, Titanium can be good, a tip if you are having your machined could be to use a titanium top with a steel bottom, then make the bottom .25mm wider on each side. As for Carillo, they make I-beams. Cunningham also makes some of the best rods around, and also...
  6. ZoRG

    What valve seat material for Titanium Valves.

    They are all expensive :( Colsibro is the cheapest afaik, then Trojan, then CB I think trojan and CB are about the same, they don't differ by that much in raw form. Colsibro is not compatible with titanium though. And if your head porter doesn't have a respirator, go with trojan.
  7. ZoRG

    What valve seat material for Titanium Valves.

    From Columbia metals since they are a supplier of these. Hardness: TROJAN : HB200Minimum 230-270Typical Copper Beryllium : HB180 Colsibro : HB200 COLSIBRO is a Copper Nickel Silicon alloy which offers a remarkable blend of properties at a non exotic price.
  8. ZoRG

    Sequential ratchet

    No no, thats the drum, I am talking about the gear lever mechanism, it can ratchet both forwards and backwards.
  9. ZoRG

    Quarter Speed Cam

    The F1 cams I have seen were all single lobes.
  10. ZoRG

    Sequential ratchet

    Does anyone have any sliced views or animations explaining how a bi-directional ratchet typically used in a sequential gearbox works?
  11. ZoRG

    Titanium Brakes

    F1 problably use Ti as the hats, although, I would think Aluminium would suffice. To be honest, personally, I still think the only way to go for a street car is carbon/ceramic, it might be difficult to find some currently though, but the cost would be the same if not cheaper than the titanium...
  12. ZoRG

    Dry Sump Pump

    Gerotor pumps have higher vacuum, and also allow for higher rpm, they don't cavitate as early as gear pumps. As for volume/pressure vs size, I think the Gerotor is slightly more compact as well. But not 100% sure.
  13. ZoRG

    CNC Retrofitting

    No problem, it will be some time though, we have had some unfortunate badluck with a sudden death of one of our suppliers and are currently spending alot on screw machines to bring the work inhouse, so we will problably only move towards this early next year. Regards, Jonathan.
  14. ZoRG

    What valve seat material for Titanium Valves.

    Can you do your own machining?
  15. ZoRG

    What valve seat material for Titanium Valves.

    Not sure, if you want long life, go with silicone bronze guides, the material is cheap as well... Manganese have better performance with acceptable wear, the material is also cheap, we will be doing a run 30 or so sets of Manganese guides soon. Beryllium/copper is very expensive, if you wont be...
  16. ZoRG

    What valve seat material for Titanium Valves.

    www.matweb.com
  17. ZoRG

    What valve seat material for Titanium Valves.

    Silicone Bronze guides are quite hard, harder than Beryllium-copper actually, trojan is also slightly harder, with even higher heat conduction making it perfect for titanium and no toxic side effects for the head porter.
  18. ZoRG

    What valve seat material for Titanium Valves.

    They don't show any problems(Ampco 45). I will let you know in a few months how mine works out, the head is still being worked on. Bronze/Metal is perfectly fine without lead though as long as the Bronze isn't too soft.
  19. ZoRG

    What valve seat material for Titanium Valves.

    Well bronze guides/seats are used in many performance street motors on ULP with no long term problems.
  20. ZoRG

    Light Weight Material for Disk Brake Rotors

    As a affordable alternative, have a look at ebay, there are carbon rotors going from $50-$200 US. Just make sure you can get some matching pads.

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