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9.8 : 1 VS 11.2 : 1 Compression
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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>StrokHer</b> <br /><small>Member # 9244</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(2010,3,14,19,1,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Im doing a stroker build right now and I am trying to chose What compression to run.<br /><br />Car will not be driven on the street.<br /><br />What Will the power difference be?<br />Can i run 91 octane on 11.2:1? Or Do i need an additive? or higher Octane?<br />What gas to run on both with a 150 shot of nitrous?<br />Will 9.8:1 accept any form of boost later?<br /><br /><br />Engine setup<br />-393w forged pistons/rods Aftermarket cast crank<br />-205cnc ported tw heads<br />-Cam<br />Duration @ .050" - 236/248<br />Valve Lift with 1.6 Rocker - .574/.595<br />Lobe Separation - 110°<br />-Port matched Victor jr manifod<br />-750 Dp carb<br />-150 shot<br /><br />Horse power est. on both compressions?<br /><br />Thanks<br /> <br /> <small>[ April 14, 2010, 07:04 PM: Message edited by: StrokHer ]</small> <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>70mach351</b> <br /><small>Member # 7528</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(2010,3,14,19,8,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> switch to E85. look up rob mix e85 conversions. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>92stangLX</b> <br /><small>Member # 3252</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(2010,3,14,19,14,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> 11.2:1 = race gas<br />9.8:1 = no boost<br /><br /> <img border="0" title="" alt="[Smile]" src="smile.gif" /> <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>StrokHer</b> <br /><small>Member # 9244</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(2010,3,15,0,53,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> anyone else? <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>phildog</b> <br /><small>Member # 1214</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(2010,3,15,1,13,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Extra compression is free horsepower, you just need the fuel system and octane to feed it. I would rather have a higher comp motor with just a little boost or squeeze than some low comp motor that you have to boost the hell out of it to get some numbers, at that point you need a mongo fuel system anyway. <br /><br />Higher compression, run race gas, and squeeze it later if you want more, IMHO. <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>StrokHer</b> <br /><small>Member # 9244</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(2010,3,15,9,27,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> fuel system is<br />prostar 500<br />5 gal cell<br />huge lines<br /> <br /> <small>[ April 15, 2010, 07:16 PM: Message edited by: StrokHer ]</small> <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>JohnB</b> <br /><small>Member # 969</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(2010,3,15,16,1,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> If you're not going to street drive it, why bother with pump gas? Run the 11+ to 1 compression, a bigger carb than that, and a cam with a touch more lobe sep. A nitrous setup will need race gas if you want to keep it together. <br /><br />A 9.8-1 setup can run boost, you just need to know what you're doing when it comes to setting it up and tuning it. <br /> </font> </td></tr> </table></td></tr></table> <br /> <br />
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