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<table border="0" cellpadding="1" cellspacing="1" width="99%" align="center"> <tr bgcolor="#000000"><td> <table border="0" width="100%" cellpadding="3" cellspacing="0"> <tr bgcolor="#000099"> <td colspan="2" align="left"> <font size="2" color="#ffffff" face="Verdana, Arial"> <b>T O P I C R E V I E W</b> </font></td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>05s197</b> <br /><small>Member # 13235</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2014,7,11,18,9,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> <a href="http://www.powerblocktv.com/episode/HP2010-01/horsepowers-blue-oval-302#.U-lpxhZKfR" target="_blank">http://www.powerblocktv.com/episode/HP2010-01/horsepowers-blue-oval-302#.U-lpxhZKfR</a><br /><br />after watching this video I decided I want to do something similar. I want RHS 200cc heads 58cc chamber and want to keep the stock connecting rods and crankshaft. In the video they claim a compression ratio of 10.2:1 and say for the test they used 89 octane fuel. My first question wouldnt the engine detonate with that low octane with that CR? second question what pistons should I get for maximum CR on 91 octane? <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Tom Renzo</b> <br /><small>Member # 13165</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2014,7,11,18,14,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Depends on the cam not the compression ratio. Always pick a cam before a compression figure. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Greasy</b> <br /><small>Member # 5258</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2014,7,12,7,34,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> </font><blockquote><font size="1" face="Verdana, Arial">quote:</font><hr /><font size="2" face="Verdana, Arial">Originally posted by Tom Renzo:<br /><strong> Depends on the cam not the compression ratio. Always pick a cam before a compression figure. </strong></font><hr /></blockquote><font size="2" face="Verdana, Arial">When you get a custom cam and are filling out the cam sheet it asks what compression ratio you're going to be running. <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>4IDFOX</b> <br /><small>Member # 9921</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2014,7,12,12,54,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> </font><blockquote><font size="1" face="Verdana, Arial">quote:</font><hr /><font size="2" face="Verdana, Arial">Originally posted by Greasy:<br /><strong> </font><blockquote><font size="1" face="Verdana, Arial">quote:</font><hr /><font size="2" face="Verdana, Arial">Originally posted by Tom Renzo:<br /><strong> Depends on the cam not the compression ratio. Always pick a cam before a compression figure. </strong></font><hr /></blockquote><font size="2" face="Verdana, Arial">When you get a custom cam and are filling out the cam sheet it asks what compression ratio you're going to be running. </strong></font><hr /></blockquote><font size="2" face="Verdana, Arial">And the fuel. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Tom Renzo</b> <br /><small>Member # 13165</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2014,7,12,14,20,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Thats right if you want them to select your cam. But asking how much compression you can run on 91 is a moot question because you do not know the specks of the cam you are running. First the cam then the compression ratio. Simple that is how it works. <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>05s197</b> <br /><small>Member # 13235</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2014,7,12,23,56,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Okay thanks for the help. what pistons should I get while keeping the stock crankshaft and connecting rods? <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>4IDFOX</b> <br /><small>Member # 9921</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2014,7,18,4,33,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> I would suggest these pistons. <br /><br /><a href="http://www.summitracing.com/parts/pbp-14777-030/overview/" target="_blank">http://www.summitracing.com/parts/pbp-14777-030/overview/</a><br /><br />And these heads. <br /><br /><a href="http://www.summitracing.com/parts/tfs-51410002-m58/overview/" target="_blank">http://www.summitracing.com/parts/tfs-51410002-m58/overview/</a><br /><br />And some 1.7 rockers. <br />It will run great. <br /> </font> </td></tr> </table></td></tr></table> <br /> <br />
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