WRECKSHOP
Expert Class
Posts: 359
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posted October 22, 2009 03:38 PM
Cylinder RA Bore Finish ???
What is the best "RA finish" to have when doing a overbore and replate ? Give me #'s if anyone will or an idea or a suggestion....
  
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KZScott
Needs a life
high on speed
Posts: 7235
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posted October 22, 2009 05:33 PM
I would just let Millennium do their thing, but it would be interesting to know what sort of RA finish they end up with
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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tcchin
Zone Head
Posts: 867
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posted October 22, 2009 09:49 PM
If you go to the Brush Research site (http://www.brushresearch.com/literature.php?type=2), there are five documents that deal with that question in graphic detail. Everything there is worth reading.
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rgeorge
Expert Class
Posts: 220
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posted October 24, 2009 01:34 PM
 Edited By: rgeorge on 24 Oct 2009 21:45
+1 Very good reading from Brush Research.
Millennium takes the cylinders to final dimension by honing. They may use a grit slightly coarser than ideal to keep the finishing time (cost) low. They appear to be a very nice finish when they are done, next time I get a block done by them I will measure the finish.
I recently did a quick deglaze on my cylinders with a 240 grit Brush Research flex hone. This thread got me thinking about surface finish, so I took the block to work on Fri to get some measurements.
After hand honing:
Bottom of cylinder
Top of cylinder
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rgeorge
Expert Class
Posts: 220
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posted October 24, 2009 02:12 PM
Edited By: rgeorge on 24 Oct 2009 22:14
I also measured the head gasket sealing surface. Cometic recommends a finish of 50 or better for the MLS gasket I use.
The block was surface ground .005 by Millennium, then finished by hand with 600 grit and a quick once over with 800 grit. The head was machined .005 by Andy at Metric cycles, so I started with 400 grit and went to 800. Took A lot of time doing figure-8s with a 2-4-6 block, but gave a very nice finish.
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KZScott
Needs a life
high on speed
Posts: 7235
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posted October 24, 2009 05:33 PM
Wow! keep posting about the rest of the build Rob
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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tcchin
Zone Head
Posts: 867
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posted October 24, 2009 09:33 PM
Mmmmmm - tool envy.
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whitehendrix
Zone Head
fails!
Posts: 757
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posted October 24, 2009 10:03 PM
craftsman in action.
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Duct tape is the handyman's secret
weapon. The black is for formal
occasions. - ZRXDean
ill never own a busa unless
someone gives me one.... and then
ill sell it -KZScott
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entropy
Moderator
Posts: 8671
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posted October 24, 2009 10:51 PM
cool stuff, Rob!!
At my job we we don't don't have those kinda tools available 
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This moderator uses moderation in moderation
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WRECKSHOP
Expert Class
Posts: 359
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posted October 26, 2009 01:22 PM
WOW...Nice !!!
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chavcat
Zone Head
Posts: 524
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posted October 26, 2009 03:15 PM
Info on the tools would also be helpful! Looks impressive.
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