Pistons and rings
m (→KB ring gap and piston to wall clearance instructions) |
(→KB ring gap and piston to wall clearance instructions: minor clean up) |
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==KB ring gap and piston to wall clearance instructions== | ==KB ring gap and piston to wall clearance instructions== | ||
| − | {{Note1}}The following info is for the KB Icon/Icon FHR (Forged Head Relief) series and some KB hypereutectic pistons. Refer to manufacturer's instructions for other brands and types of pistons. | + | {{Note1}}The following info is for the KB Icon/Icon FHR (Forged Head Relief) series and some KB hypereutectic pistons. Refer to manufacturer's instructions to verify these specs as revisions/redesigns may cause them to vary, and for other brands and types of pistons. |
;[http://www.kb-silvolite.com/icon/clearance_pop.php Suggested Piston to Wall Clearance]<nowiki>:</nowiki> | ;[http://www.kb-silvolite.com/icon/clearance_pop.php Suggested Piston to Wall Clearance]<nowiki>:</nowiki> | ||
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'''Example:''' 4" bore "Street Normally Aspirated" = 4" bore x 0.0065 = 0.026 top ring end gap. NOTE: Second ring end gaps do not need extra clearance. Dyno and track testing has shown that 34 degrees or less total ignition timing makes the best HP and time. Excessive spark advance, lean fuel mixture or too much compression for the fuel and cam used will make heat sufficient to butt piston rings with as much as .060" ring end gap. The entire top land can expand enough to contact the cylinder walls, when close to melt down temperatures are reached. | '''Example:''' 4" bore "Street Normally Aspirated" = 4" bore x 0.0065 = 0.026 top ring end gap. NOTE: Second ring end gaps do not need extra clearance. Dyno and track testing has shown that 34 degrees or less total ignition timing makes the best HP and time. Excessive spark advance, lean fuel mixture or too much compression for the fuel and cam used will make heat sufficient to butt piston rings with as much as .060" ring end gap. The entire top land can expand enough to contact the cylinder walls, when close to melt down temperatures are reached. | ||
| − | <table border="1" cellpadding="2" cellspacing="0"> | + | <br><table border="1" cellpadding="2" cellspacing="0"> |
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" rowspan="3" class="table_label_two" align="center" valign=" | + | <td bgcolor="#FFF8DC" rowspan="3" class="table_label_two" align="center" valign="center" width="180">'''APPLICATION'''</td> |
| − | <td bgcolor="#FFF8DC" colspan="3" class="table_label_two" align="center">''' | + | <td bgcolor="#FFF8DC" colspan="3" class="table_label_two" align="center">'''HYPEREUTECTIC'''</td> |
| − | <td bgcolor="#FFF8DC" colspan="3" class="table_label_two" align="center">''' | + | <td bgcolor="#FFF8DC" colspan="3" class="table_label_two" align="center">'''FORGED'''</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Street - Normally Aspirated</span></td> | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Street - Normally Aspirated'''</span></td> |
<td class="row_b" align="center">0.0065"</td> | <td class="row_b" align="center">0.0065"</td> | ||
<td class="row_a" align="center">0.0015" - 0.0020"</td> | <td class="row_a" align="center">0.0015" - 0.0020"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Street - Towing</span></td> | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Street - Towing'''</span></td> |
<td class="row_b" align="center">0.0080"</td> | <td class="row_b" align="center">0.0080"</td> | ||
<td class="row_a" align="center">0.0015" - 0.0020"</td> | <td class="row_a" align="center">0.0015" - 0.0020"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Street - Nitrous or Supercharged</span></td> | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Street - Nitrous or Supercharged'''</span></td> |
<td class="row_b" align="center">0.0080"</td> | <td class="row_b" align="center">0.0080"</td> | ||
<td class="row_a" align="center">0.0020" - 0.0025"</td> | <td class="row_a" align="center">0.0020" - 0.0025"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Circle Track - 2 BBL or Restrictor | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Circle Track -<br> 2 BBL or Restrictor Plate Gasoline'''</span></td> |
<td class="row_b" align="center">0.0070"</td> | <td class="row_b" align="center">0.0070"</td> | ||
<td class="row_a" align="center">0.0015" - 0.0045"</td> | <td class="row_a" align="center">0.0015" - 0.0045"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Circle Track - Unrestricted</span></td> | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Circle Track - Unrestricted'''</span></td> |
<td class="row_b" align="center">0.0080"</td> | <td class="row_b" align="center">0.0080"</td> | ||
<td class="row_a" align="center">0.0025" - 0.0045"</td> | <td class="row_a" align="center">0.0025" - 0.0045"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Circle Track - Alcohol Injection</span></td> | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Circle Track - Alcohol Injection'''</span></td> |
<td class="row_b" align="center">0.0060"</td> | <td class="row_b" align="center">0.0060"</td> | ||
<td class="row_a" align="center">0.0025" - 0.0045"</td> | <td class="row_a" align="center">0.0025" - 0.0045"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Circle Track - | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Circle Track - Carbureted Alcohol'''</span></td> |
<td class="row_b" align="center">0.0080"</td> | <td class="row_b" align="center">0.0080"</td> | ||
<td class="row_a" align="center">0.0030" - 0.0045"</td> | <td class="row_a" align="center">0.0030" - 0.0045"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Drag - Gasoline</span></td> | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Drag - Gasoline'''</span></td> |
<td class="row_b" align="center">0.0075"</td> | <td class="row_b" align="center">0.0075"</td> | ||
<td class="row_a" align="center">0.0015" - 0.0045"</td> | <td class="row_a" align="center">0.0015" - 0.0045"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Drag - Alcohol</span></td> | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Drag - Alcohol'''</span></td> |
<td class="row_b" align="center">0.0065"</td> | <td class="row_b" align="center">0.0065"</td> | ||
<td class="row_a" align="center">0.0015" - 0.0045"</td> | <td class="row_a" align="center">0.0015" - 0.0045"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Drag - Supercharged or Nitrous | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Drag - Supercharged or Nitrous Gasoline'''</span></td> |
<td class="row_b" align="center">0.0095"</td> | <td class="row_b" align="center">0.0095"</td> | ||
<td class="row_a" align="center">0.0020" - 0.0045"</td> | <td class="row_a" align="center">0.0020" - 0.0045"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Drag - Supercharged Alcohol</span></td> | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Drag - Supercharged Alcohol'''</span></td> |
<td class="row_b" align="center">0.0085"</td> | <td class="row_b" align="center">0.0085"</td> | ||
<td class="row_a" align="center">0.0015" - 0.0045"</td> | <td class="row_a" align="center">0.0015" - 0.0045"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Drag - Supercharged Fuel</span></td> | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Drag - Supercharged Fuel'''</span></td> |
<td class="row_b" align="center">0.0115"</td> | <td class="row_b" align="center">0.0115"</td> | ||
<td class="row_a" align="center">0.0030" - 0.0050"</td> | <td class="row_a" align="center">0.0030" - 0.0050"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Marine - Normally Aspirated</span></td> | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Marine - Normally Aspirated'''</span></td> |
<td class="row_b" align="center">0.0080"</td> | <td class="row_b" align="center">0.0080"</td> | ||
<td class="row_a" align="center">0.0030" - 0.0045"</td> | <td class="row_a" align="center">0.0030" - 0.0045"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Marine - Supercharged</span></td> | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Marine - Supercharged'''</span></td> |
<td class="row_b" align="center">0.0090"</td> | <td class="row_b" align="center">0.0090"</td> | ||
<td class="row_a" align="center">0.0030" - 0.0045"</td> | <td class="row_a" align="center">0.0030" - 0.0045"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Air Cooled Baja</span></td> | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Air Cooled Baja'''</span></td> |
<td class="row_b" align="center">0.0075"</td> | <td class="row_b" align="center">0.0075"</td> | ||
<td class="row_a" align="center">0.0030" - 0.0045"</td> | <td class="row_a" align="center">0.0030" - 0.0045"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">Propane</span></td> | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Propane'''</span></td> |
<td class="row_b" align="center">0.0065"</td> | <td class="row_b" align="center">0.0065"</td> | ||
<td class="row_a" align="center">0.0015" - 0.0045"</td> | <td class="row_a" align="center">0.0015" - 0.0045"</td> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label"> | + | <td bgcolor="#FFF8DC" class="row_a" align="left"><span class="small_label">'''Monster Truck or Mudbog - Supercharged '''</span></td> |
<td class="row_b" align="center">0.0090"</td> | <td class="row_b" align="center">0.0090"</td> | ||
<td class="row_a" align="center">0.0025" - 0.0045"</td> | <td class="row_a" align="center">0.0025" - 0.0045"</td> | ||
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