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valves hitting on decked 6025 heads? w/ 1.7 RR and F303
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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>SVT Fox</b> <br /><small>Member # 1837</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(2008,0,17,23,22,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> heads are performers 6025s then been shaven down twice now from warping. I was installing my ford/crane 1.7 RR and on about the 4th one back the motor would stop. I never torqued it hard or tried to force it. I loosened up everything and it was free again..<br /><br />The timing is set at 0 on cam gear.<br /><br />timing? (easy fix)<br /><br />RR ratio/pushrod lenght? (2nd easy)<br /><br />camshaft?<br /><br /><br />I hope i dident bend my new valves!!! or damage a lifter... <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>F8LSN8K</b> <br /><small>Member # 7080</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(2008,0,18,5,9,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> if its taken apart or ur gonna take it apart, degree the cam at -4 should clear <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>SVT Fox</b> <br /><small>Member # 1837</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(2008,0,18,12,55,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> thats what people are saying on other forums, My cam was not degreed correctly so I have to fix that. Im going to get a wheel and degree it if retarding it 4 does not work. <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>turbo50</b> <br /><small>Member # 6700</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(2008,0,18,13,31,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Dude, NEVER go off of what people say. Set it up and do a piston to valve clearance check. Do it the right way and do it once.<br /><br />Way too much money in that combo to skimp. <br /><br />You are INSANE to skimp on this. <br /><br />You do understand that just turning the motor over and it clearing has NOTHING to do with piston to valve clearance.<br /><br />There are so many things going on in the MOST important piece of you motor, the valvetrain.<br /><br />There are valve harmonics, especially if that is an off the shelf edelbrock, there are piston to valve radiuses to be checked etc.<br /><br />Here is a link that will help (if you are unfamilar with this)and you can call me anytime. I have done this millions of times.<br /><br />Also degreeing the cam +/- dramatically changes your power band and just makes no sense unless you are doing it for a specific reason.<br /><br />I dont mean to sound harsh, but I am trying to help out a fellow enthusiast.<br /><br />Dan<br /><br /><a href="http://sbftech.com/index.php/topic,57.0.html" target="_blank">http://sbftech.com/index.php/topic,57.0.html</a> <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>turbo50</b> <br /><small>Member # 6700</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(2008,0,18,13,36,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Also if you need to flycut the pistons, I can do this for your or show you how or send you a link. The tools are expensive for what you need done and it is labor intensive but well worth it. I have the tools for 2.02 but not for 1.90 or 1.60, however I will be purchasing them shortly for 1.90 and 1.60 even though I have never had an exhaust valve come close to hitting on a non 17 or 23 degree twisted chamber SBF head. <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>SVT Fox</b> <br /><small>Member # 1837</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(2008,0,18,14,17,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> i can assure you Im not putting it back together unless I know its correct. I have 1.6 exhaust 1.9 intake. Im calling the shop that decked them. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>turbo50</b> <br /><small>Member # 6700</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(2008,0,18,14,20,0), 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 SVT Fox:<br /><strong> i can assure you Im not putting it back together unless I know its correct. I have 1.6 exhaust 1.9 intake. Im calling the shop that decked them. </strong></font><hr /></blockquote><font size="2" face="Verdana, Arial">Ok.....but you can save yourself the time and hassle of removing the shortblock and taking it to a machine shop to be flycut by doing it yourself. If you put the cam in, degreed it and put the heads on yourself, then you can definitely check PTV clearances.<br /><br />Im here if you need any help. <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>turbo50</b> <br /><small>Member # 6700</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(2008,0,18,14,32,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Also,<br /> Something to consider. If you are at 0 clearance now (interference) with a 1.7 rocker then going to a 1.6 rocker will net you 40 tho clearance on the high side and 20 tho on the low side. You want at least 80 tho on the intake side. FYI.<br /><br />Also most rockers 1.7,1.6 etc are machined with allowable tolerances so when you actually measure it can be up to 1.648 or so actual ratio and still be put into a package and sold. Can be a good and a BAD thing for you..<br /><br />Something to remember. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>SVT Fox</b> <br /><small>Member # 1837</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(2008,0,18,15,2,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> I know my cam is not the best choice for my setup, Would getting a custom grind be the best choice as this point? <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>SVT Fox</b> <br /><small>Member # 1837</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(2008,0,18,15,12,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> i just realized that some of the valves, the ones that were hitting, those lifters are not compressing and in turn the valve was slightly open when rockers got torqued down... <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>turbo50</b> <br /><small>Member # 6700</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(2008,0,18,15,16,0), 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 SVT Fox:<br /><strong> i just realized that some of the valves, the ones that were hitting, those lifters are not compressing and in turn the valve was slightly open when rockers got torqued down... </strong></font><hr /></blockquote><font size="2" face="Verdana, Arial">Id still check and double check PTV. Just the fact that the motor spins over and doesnt contact is not good enough man.<br /><br />You can check PTV head on or head off. Worth the time.<br /><br />Glad you found one issue.<br /><br />You can play with headgasket thickness and yes, if you know what your interference is you can have a cam custom ground around this. Gonna have to give alot of info to the cam grinder.<br /><br />Try Jay Allen at <a href="http://www.camshaftinnovations.com/." target="_blank">http://www.camshaftinnovations.com/.</a> He will need your valve springs specs and about 1,000 other pieces of information.<br /><br />That cam will run like a raped ape and perform better than any OTS cam more than likely.<br /><br />Co$t money tho..<br /><br />Good luck. <br /> </font> </td></tr> </table></td></tr></table> <br /> <br />
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