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914World.com _ 914World Garage _ Keith Black Piston to Cylinder Clearance.
Posted by: tach Sep 10 2014, 04:43 PM
Does anyone know what the proper piston cylinder clearance for a 96mm Keith Black piston would be?
I have a new set of AA cylinders and they are .0020" larger than the KB Pistons.
I also have a original Porsche 1.8 94mm cylinders bored out to 96mm they are .0032" larger than the Pistons.
The Question is. What is the exact P/C clearance in thousands or mm.
Thank you.
Posted by: wndsrfr Sep 10 2014, 05:21 PM
Does anyone know what the proper piston cylinder clearance for a 96mm Keith Black piston would be?
I have a new set of AA cylinders and they are .0020" larger than the KB Pistons.
I also have a original Porsche 1.8 94mm cylinders bored out to 96mm they are .0032" larger than the Pistons.
The Question is. What is the exact P/C clearance in thousands or mm.
Thank you.
Not sure about the clearance, but your OEM 1.8 cylinders will remain more dimensionally stable than a new set will....
Posted by: tach Sep 10 2014, 05:25 PM
Does anyone know what the proper piston cylinder clearance for a 96mm Keith Black piston would be?
I have a new set of AA cylinders and they are .0020" larger than the KB Pistons.
I also have a original Porsche 1.8 94mm cylinders bored out to 96mm they are .0032" larger than the Pistons.
The Question is. What is the exact P/C clearance in thousands or mm.
Thank you.
Not sure about the clearance, but your OEM 1.8 cylinders will remain more dimensionally stable than a new set will....
The Question is. What is the exact P/C clearance in thousands or mm.
Posted by: wndsrfr Sep 10 2014, 07:11 PM
[quote name='tach' date='Sep 10 2014, 03:25 PM' post='2084446']
[quote name='wndsrfr' post='2084444' date='Sep 10 2014, 06:21 PM']
[quote name='tach' post='2084434' date='Sep 10 2014, 02:43 PM']
Does anyone know what the proper piston cylinder clearance for a 96mm Keith Black piston would be?
The Question is. What is the exact P/C clearance in thousands or mm.
[/quote]
Here's a link to get what you're looking for:
http://www.hughesengines.com/TechArticles/2clearancerequirementsforhypereutecticpistons.php
Look down the page to "Aircooled/Baja" & you'll see the P/C clearance for under 4.1" bore is .0030 to .0045.....
Others with more experience (Jake?) chime in if this is off target please.
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