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View Full Version : Rotary lapping?


C. Ludwig
10-05-2003, 04:30 PM
Anyone in the Cincy, Columbus or Indy area know any local places that can lap side housings?

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Chris Ludwig
08 ITS RX7 CenDiv
Hahn63
10-06-2003, 08:39 AM
Good question!! If you find one please let me know.

Roland
Jim Susko
10-06-2003, 06:44 PM
Chris, I originally looked into surface grinding until it became clear I might as well buy new ones for the price. Believe it or not, I ended up having the plates ground on a regluar rotary table, like is used to resurface heads. Just get an experienced operator and have him check the thickness of the plates at at least three or four points around the periphery as he goes to assure constant thickness and parallelness. Then hand lap with 240 wet dry sandpaper wrapped around a flat hard sanding block using a slight detergent-water mixture. Finish with 400.

The resulting surface is not nitrided so it breaks in quickly and performs well. I have run my engine for about 8 or so seasons and it is still going strong.

Jim Susko
G-Force Engineering
C. Ludwig
10-06-2003, 06:54 PM
Hmmm. Sounds like a plan.

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Chris Ludwig
08 ITS RX7 CenDiv
Dave Burchfield
10-06-2003, 09:32 PM
Chris,

I have a business card of an individual who can do the job. I will attempt to locate it tomorrow.

db
Speed Raycer
10-06-2003, 09:54 PM
Have you guys read the thread over on www.rx7club.com (http://www.rx7club.com) about the guy trying to find a coating for the rotor and side housings?

Very long and interesting read (19 pages) and sounds promissing in the not to distant future.

http://www.rx7club.com/forum/showthread.ph...threadid=111142 (http://www.rx7club.com/forum/showthread.php?threadid=111142)

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Scott
It's not what you build...
it's how you build it

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C. Ludwig
10-07-2003, 06:46 PM
I don't have the patience to wade through it all. Might be why I didn't finish college. http://Forums.ImprovedTouring.com/it/biggrin.gif I had thought about Nicasil plating though. Let the rules geeks jump on that.

And Dave I just knew you were the one that would come up with the place! Almost made this a Dave B thread.

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Chris Ludwig
08 ITS RX7 CenDiv

[This message has been edited by C. Ludwig (edited October 07, 2003).]