Re-conditioning side plates ( resurfacing and re hardening)

To_Slow Re-conditioning side plates (... 07-17-2008, 07:51 AM

Herblenny Who do you get it to nitrate?... 07-18-2008, 11:23 PM

To_Slow My regular heat treat guy... 07-19-2008, 10:08 AM

Garfinkles Motor Works I have plates for eight or... 09-11-2008, 09:07 PM

To_Slow Hello For a 2 rotor engine.... 09-12-2008, 07:34 AM

Whizbang and that 480 would be for all... 09-12-2008, 07:40 AM

To_Slow Yes all 3 irons 4 sides. 09-12-2008, 09:31 AM

To_Slow Hello. I'm located in... 09-15-2008, 05:28 AM

Whizbang ill be contacting you over... 09-15-2008, 09:18 AM

To_Slow Sounds good 09-21-2008, 06:47 PM

Rogrx7 This is an excellent price. 10-02-2008, 02:11 PM

Cp1 Price and sales aside, what... 10-21-2008, 06:12 AM

To_Slow The next set of plates i do i... 11-01-2008, 07:55 AM

To_Slow I will be running a special... 05-28-2009, 10:42 AM

To_Slow Here are the Rockwell... 09-29-2009, 05:20 AM

Herblenny Chip, I was told you... 05-28-2009, 11:10 AM

To_Slow On used plates you need to... 05-28-2009, 11:41 AM

TehMonkay Hot damn this sounds like a... 05-28-2009, 12:55 PM

NoDOHC Wow! That is a significant... 09-29-2009, 07:15 PM

To_Slow Still Running that 420.00$$ ... 12-09-2009, 05:08 PM

mazdadude7 Thats a good deal! 12-10-2009, 01:29 AM

91GSL-SE Hi could you tell me what the... 01-07-2010, 02:34 AM

To_Slow Just finished up a set of ... 01-07-2010, 09:20 AM

91GSL-SE .. 01-08-2010, 02:34 AM

To_Slow 61 rms 01-08-2010, 09:25 AM

To_Slow 61 rms 01-08-2010, 09:26 AM

C. Ludwig Sure about that number? We... 01-08-2010, 05:40 PM

To_Slow Just got in to work,... 01-11-2010, 07:10 AM

C. Ludwig :rofl: That's funny. 01-11-2010, 03:29 PM

To_Slow It has nothing to do with... 01-08-2010, 09:29 AM

classicauto Probably gets them done in... 01-08-2010, 03:36 PM

TitaniumTT That's some nice, thorough... 01-08-2010, 12:19 PM

91GSL-SE I was wondering about that.... 01-12-2010, 12:16 PM

To_Slow Rebuilding a motor for ... 01-08-2011, 11:38 AM

Judge Ito your exhaust port needs to be... 01-09-2011, 04:27 PM

To_Slow Thanks for the advice, ran... 01-09-2011, 04:32 PM

Judge Ito be open to advice. just... 01-09-2011, 06:55 PM

Judge Ito and yes it brings issues. the... 01-09-2011, 06:57 PM

To_Slow http://img35.imageshack.us/img... 01-09-2011, 07:38 PM

To_Slow :) 01-09-2011, 07:57 PM

Judge Ito looks like you ran to the... 01-09-2011, 08:27 PM

To_Slow :puke: Seriously??????? I... 01-09-2011, 08:45 PM

Judge Ito from the pics it looks like... 01-10-2011, 06:13 AM

mazpower Can this service be applied... 01-10-2011, 02:09 PM

NoDOHC Thank you sir for your good... 01-10-2011, 07:36 PM

To_Slow Another set of 13b REW irons... 03-17-2011, 12:44 PM

Judge Ito question I have. upon... 03-27-2011, 01:47 PM

To_Slow Heat treating the plates... 03-28-2011, 09:20 AM

Judge Ito looks near perfection. have... 03-29-2011, 06:27 AM

To_Slow I did tore down a engine for... 03-29-2011, 06:56 AM

Mateepay im curious to know if your... 06-06-2011, 10:29 AM

JDriftM I have a full set of S4 Turbo... 06-10-2011, 06:52 PM

To_Slow For sure they can be done. ... 06-10-2011, 08:00 PM

JDriftM I'm still a little ways away.... 06-14-2011, 08:17 PM

To_Slow Plates before and after for a... 06-30-2011, 12:34 PM

To_Slow Here is another set of irons... 07-05-2011, 12:57 PM

NoDOHC Why does the center plate... 07-05-2011, 10:50 PM

infernosg That's because it's a N/A... 07-06-2011, 08:18 AM

To_Slow One more set of 13b housings... 08-03-2011, 10:34 AM

To_Slow 1 more set of plates to the... 08-04-2011, 10:58 AM

To_Slow Here is a set of 20b side... 12-10-2011, 08:30 PM

To_Slow Here is a good example why... 08-06-2012, 09:37 PM

To_Slow Some more plates saved from... 08-17-2012, 10:48 PM

hiboost Couple of pics claiming... 06-06-2014, 04:04 PM

01-11-2010, 07:10 AM

#11

To_Slow

Rotary Fanatic

Join Date: Feb 2008

Location: Shelby Twp MI.

Posts: 315

Rep Power: 18

Quote:

Originally Posted by C. Ludwig

Sure about that number? We had some plates ground a while back and took some measurements of re-ground used and brand new OE plates. We found a new set of OE plate to be about 12 Ra (micro-inches) on average. Our guy got the used plates to an average of 8 Ra.

The rough correlation between the RMS and Ra is around 11%. So our measurements for the stock plate would roughly be 13 RMS.

They look to good to be as bad as your measurement would suggest.

Just got in to work, re-cheeked the plates, got a RMS of 12. I asked the night shift guy to do it for me, he checked the back side of the rear plate ...

O well....

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