Re-conditioning side plates ( resurfacing and re hardening) - Page 3

To_Slow · 01-11-2010, 07:10 AM

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....

C. Ludwig · 01-11-2010, 03:29 PM

Quote:

Originally Posted by To_Slow

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....

That's funny.

91GSL-SE · 01-12-2010, 12:16 PM

I was wondering about that. At first I thought it was a typo and you thought 16...
Thanks for clearing that up for us.

To_Slow · 01-08-2011, 11:38 AM

Rebuilding a motor for customer, Ported, surface ground, nitrated, new freeze plugs, re zinc plated coolant nipple and new oil galley plugs.

Thanks

New site is up alsso....

Judge Ito · 01-09-2011, 04:27 PM

your exhaust port needs to be beveled. buddy you need to make sure all sharp edges are beveled.. u need a 2mm bevel. gets me upset to still see ports like this.

To_Slow · 01-09-2011, 04:32 PM

Quote:

Originally Posted by Judge Ito

your exhaust port needs to be beveled. buddy you need to make sure all sharp edges are beveled.. u need a 2mm bevel. gets me upset to still see ports like this.

Thanks for the advice, ran this port in many engines, with out any issues..

Judge Ito · 01-09-2011, 06:55 PM

Quote:

Originally Posted by To_Slow

Thanks for the advice, ran this port in many engines, with out any issues..

be open to advice. just because you run this port like this, doesn't make it right. Brian (BDC Motorsports) also learned the hard way. He ran similar ports to you. why do you think Mazda runs a 2mm bevel on the factory exhaust port on rotor housings? plain and simple to protect the apex seal when the apex seal is closing the exhaust port. I wrote a thread at nopistons with pictures about this. So relax open your ears and learn.. we never stop learning..

Judge Ito · 01-09-2011, 06:57 PM

Quote:

Originally Posted by To_Slow

Thanks for the advice, ran this port in many engines, with out any issues..

and yes it brings issues. the apex seal starts to loose it's radius from smashing on that sharp edge you leave behind.

To_Slow · 01-09-2011, 07:38 PM

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To_Slow · 01-09-2011, 07:57 PM

Quote:

Originally Posted by Judge Ito

and yes it brings issues. the apex seal starts to loose it's radius from smashing on that sharp edge you leave behind.

Quote:

Originally Posted by To_Slow

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Judge Ito · 01-09-2011, 08:27 PM

looks like you ran to the shop and ported the bevel in.. next time. do the bevel all the way around the outer edge of the port. 360 degrees. but you get the point.

To_Slow · 01-09-2011, 08:45 PM

Quote:

Originally Posted by Judge Ito

looks like you ran to the shop and ported the bevel in.. next time. do the bevel all the way around the outer edge of the port. 360 degrees. but you get the point.

Seriously??????? I expect someone that has so much time on their hands to at least come up with better.... wanna try again? Just remember it's Sunday night... last place I want to be is at the shop, I actually prefer the company of my family. Thanks for the entertainment

the movie we rented sucked.

Judge Ito · 01-10-2011, 06:13 AM

Quote:

Originally Posted by To_Slow

Seriously??????? I expect someone that has so much time on their hands to at least come up with better.... wanna try again? Just remember it's Sunday night... last place I want to be is at the shop, I actually prefer the company of my family. Thanks for the entertainment

the movie we rented sucked.

from the pics it looks like you did not bevel the edges, a very critical point when a rotor housing is ported. it seems like you did. the moral of the story was made. everyone needs to port the bevel in after a rotor housing is ported. let's keep it civil. and don't want to ruin your thread, but members need to know the importance of a beveled exhaust port.

mazpower · 01-10-2011, 02:09 PM

Can this service be applied to plates that have been bridgeported?

NoDOHC · 01-10-2011, 07:36 PM

Quote:

Originally Posted by Judge_Ito

from the pics it looks like you did not bevel the edges, a very critical point when a rotor housing is ported. it seems like you did. the moral of the story was made. everyone needs to port the bevel in after a rotor housing is ported. let's keep it civil. and don't want to ruin your thread, but members need to know the importance of a beveled exhaust port.

Thank you sir for your good attitude (diffusing the tense situation) and your concern for the community.

Each has their own take on port geometry - there are a lot of things that are dependant on power goals, etc. Some things are universal to all porting jobs, and Judge_ITO is right about the bevel (especially on the trailing edge of the port). The bevel also helps the flow as the sharp edge will create turbulence.

This nitriding process is a good service to the community.

01-12-2010, 12:16 PM	#33
91GSL-SE At the dirt track. Join Date: Jan 2010 Location: Willamette Valley, OR Posts: 89 Rep Power: 16	I was wondering about that. At first I thought it was a typo and you thought 16... Thanks for clearing that up for us. __________________ Rollin like a reuleaux. Unstoppable.

01-08-2011, 11:38 AM	#34
To_Slow Rotary Fanatic Join Date: Feb 2008 Location: Shelby Twp MI. Posts: 315 Rep Power: 18	Rebuilding a motor for customer, Ported, surface ground, nitrated, new freeze plugs, re zinc plated coolant nipple and new oil galley plugs. Thanks New site is up alsso.... __________________ My link

01-09-2011, 07:38 PM	#39
To_Slow Rotary Fanatic Join Date: Feb 2008 Location: Shelby Twp MI. Posts: 315 Rep Power: 18	Uploaded with ImageShack.us __________________ My link

01-10-2011, 02:09 PM	#44
mazpower Rawr Bearclaw Join Date: Feb 2008 Location: The Souf Posts: 197 Rep Power: 18	Can this service be applied to plates that have been bridgeported? __________________ Illicit Performance Rotary building, porting, tuning, chassis dyno services www.illicitperformance.com

01-09-2011, 04:27 PM	#35
Judge Ito Porting Master Join Date: Mar 2009 Location: North Jersey, USA Posts: 154 Rep Power: 17	your exhaust port needs to be beveled. buddy you need to make sure all sharp edges are beveled.. u need a 2mm bevel. gets me upset to still see ports like this.

01-09-2011, 08:27 PM	#41
Judge Ito Porting Master Join Date: Mar 2009 Location: North Jersey, USA Posts: 154 Rep Power: 17	looks like you ran to the shop and ported the bevel in.. next time. do the bevel all the way around the outer edge of the port. 360 degrees. but you get the point.