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-   Rotary Engine Building, Porting & Swaps (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/)
-   -   Counter Weight Question and End Play Question (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/counter-weight-question-end-play-question-69712/)

dac 05-03-2008 05:20 PM
Somewho I got my front counterweights mixed up. But I think they are the same?



S4 N/A Motor

S4 Turbo Motor



One has 2 drilled holes in the bottom and one has 1. Otherwise they look the same.



End Play was .012m So I sanded the front space until I got .006mm. My stock spacer was 8.10mm (Sound about right?)

Lynn E. Hanover 05-04-2008 05:44 AM
Originally Posted by dac' post='899804' date='May 3 2008, 03:20 PM
Somewho I got my front counterweights mixed up. But I think they are the same?



S4 N/A Motor

S4 Turbo Motor



One has 2 drilled holes in the bottom and one has 1. Otherwise they look the same.



End Play was .012m So I sanded the front space until I got .006mm. My stock spacer was 8.10mm (Sound about right?)


If that is an auto trans set, the rear weight may have a 4 digit number stamped into it. Same number will be on the front weight. The holes are from a balancing operation and cannot be used to identify which engine a weight came from.



Lynn E. Hanover

Lynn E. Hanover 05-04-2008 06:08 AM
Originally Posted by dac' post='899804' date='May 3 2008, 03:20 PM
Somewho I got my front counterweights mixed up. But I think they are the same?



S4 N/A Motor

S4 Turbo Motor



One has 2 drilled holes in the bottom and one has 1. Otherwise they look the same.



End Play was .012m So I sanded the front space until I got .006mm. My stock spacer was 8.10mm (Sound about right?)


I ran that through a metric conversion chart, and it looks like .006 MM is .00026"

I use .0020" to .0035" I think you sanded off too much material from your spacer. Make any measurement with the front stack torqued up like a finished engine.





Lynn E. Hanover

dac 05-04-2008 09:35 AM
Originally Posted by Lynn E. Hanover' post='899819' date='May 4 2008, 12:08 PM
I ran that through a metric conversion chart, and it looks like .006 MM is .00026"

I use .0020" to .0035" I think you sanded off too much material from your spacer. Make any measurement with the front stack torqued up like a finished engine.





Lynn E. Hanover


Yep Torqued to 60 ft per Atkins. I used Atkins for my reference. I think I typod there. My endplay is .06mm which is .0023



(I used a digtal gauge so +/- .01mm)

Lynn E. Hanover 05-04-2008 11:18 AM
Originally Posted by dac' post='899820' date='May 4 2008, 07:35 AM
Yep Torqued to 60 ft per Atkins. I used Atkins for my reference. I think I typod there. My endplay is .06mm which is .0023



(I used a digtal gauge so +/- .01mm)


Roger that. Looks good.



Lynn E. Hanover


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