Paul, Do you know the thickness of the chrome plating on the steel
  liner of the 13B housings?

  Jim Brewer

  All I know about it is in this Mazda SAE paper.

  http://www.rotaryeng.net/material-tech.pdf

  Paul Lamar

  Hi!: I'd say only porous chrome plating would fit the inner housing
  surface, if the surface is 100% flat under the microscope, oil film
  won't attach to it, and lubrication won't exist, some irregularity is
  needed, you can find some about this in the attached patents, and
  also in SAE papers 741043; 741047; 920931, and 2008-01-1050. The book
  by T Suzuki: 'The romance of engines' published by SAE, addresses
  this issue, among some very interesting others. NSU and Citroen
  Wankel RCEs used Nickasil for the working surface coating, it's used
  today by several motorcycle and car engine producers Hope this helps.
  Salut † Jose Gros-Aymerich Madrid, Spain

  Jose did a patent search and sent me a bunch of patents on this
  subject.

  http://www.pat2pdf.org/

  Thanks Jose. I have attached the Ford done in 1976. Too much to
  publish them all.

  Since Mazda  has sold 2.5 million rotary engines it is best to stick
  with what works :)

  Paul Lamar

  Is this what you are looking for? Attached are pics of the housings
  we did and have been in use for approx 7 years. Used in a dd to
  commute 50+ miles per day. It's the same shot getting progressively
  brighter.

  Sven Nielsen

  http://www.nrsrotorsports.com/


  How thick is it?

  How much did you have to grind off to get rid of the scratches and
  cracks?

  Do you have nay pictures of what it looked like before the re-chrome?

  Why does it have a dull look?

   It does not look like chrome Mazda housings.

  What do you charge to re-chrome a set of rotor housings?

  Paul Lamar

 It's oem thickness for chrome.
 Sorry no before pics, it's a 76 cosmo housing
 Actually the dull look is like Mazda's, this might be a bit more on the
 dull side but that is the general idea for trapping bits of oil for
 break-in.
 We can tweak that any amount.
 No pricing yet as testing is ongoing and we are finalizing out set-up
 now for production runs. Can't say much more as it is proprietary
 processes.
 Regards,

 Sven Nielsen


 How thick is OEM thickness?

 I have a dozen rotor housings. Used and new. None are that dull?


 Paul Lamar


Could be the camera shot

Sven Nielsen

Here is a used one I have handy.

Paul Lamar

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