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Iron vs aluminum
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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>Eagle347</b> <br /><small>Member # 6205</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(2006,0,15,12,40,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> First of all the colts are pissing me off!! I hate the stealers. <br /><br />I have been hearing latley that instead of paying the money for aluminum heads, people have been putting money into their stock heads. There is an NMRA guy from here (mike bell) and he uses stock heads. He says he does not have to worry about warping them, and they dont expand like aluminum. What do you guys think about all this? <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>FasterDamnit</b> <br /><small>Member # 442</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(2006,0,15,12,49,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> If the heads have the same flow characteristics, they will make the same power. And the Al. heads will weigh half as much. Al. heads are repairable if cracked or damaged (to a point), iron heads are very hard to repair. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Dag302</b> <br /><small>Member # 4682</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(2006,0,15,13,29,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> I always wondered that. On one of my Cobras I have the stock gt40 heads. Gromm Racing Heads in San Jose did a crap load of work to them right before I bought the car. I have always thought why didnt they just buy new heads. <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Fostang</b> <br /><small>Member # 3752</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(2006,0,15,13,36,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> I prefer aluminum heads for the above mentioned facts plus the very same thing that makes iron heads produce more HP*, that aluminum heads help resist detonation because they dissapate heat faster.<br /><br />*only if the heads are equal. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>SmokinLX</b> <br /><small>Member # 1684</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(2006,0,15,15,8,0), 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 Fostang:<br /><strong> I prefer aluminum heads for the above mentioned facts plus the very same thing that makes iron heads produce more HP*, that aluminum heads help resist detonation because they dissapate heat faster.<br /><br />*only if the heads are equal. </strong></font><hr /></blockquote><font size="2" face="Verdana, Arial">Is'nt it true You can run more compression with aluminum head's? Or a little More boost? Makes a difference with this shitty 91 octane We feed our car's in california. <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <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(2006,0,15,15,45,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> I think that paying a bunch of money to have the stock E7 heads is a waste. The GT40, GT40P, or World Products (?) iron heads might be another story. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>svt306snake</b> <br /><small>Member # 1967</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(2006,0,15,22,37,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> compression is an very big factor in picking iron or al heads i have both and they are different to each application <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Apexmotorsports</b> <br /><small>Member # 5307</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(2006,0,15,22,44,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> The reason why some people port stock heads is the racing series they are in restricts them to do so. Iron heads are good if they have port work done to them. Thumper Performance in Florida swears that his ported stock heads can get you to about 300RWHP with the right combination. Mike from Thumper is a real cool guy and he can be reached at <a href="http://www.thumperoforangepark.com/" target="_blank">http://www.thumperoforangepark.com/</a> If you call him tell him Mike Mak from Apex Motorsports/ Drive Magazine refered you.<br /><br />FWIW, for our $6500 project car I will be porting a set of stock heads to see what kind of performance I can get out of it, It's going to be very interesting to see the results because I have NEVER ported a set of heads before BUT will be getting some help/ tips from some of the best porters in the country. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Fostang</b> <br /><small>Member # 3752</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(2006,0,15,22,52,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Thumper is definatly a cool dude. <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>JoeT</b> <br /><small>Member # 298</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(2006,0,16,15,34,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> I always thought it was the other way around, apples:apples 2 heads that flow the same the iron will make more power through greater thermal efficiency (less heat lost to the environment).<br /><br />OTOH, AL heads allow you to increase compression a hair, which possibly mitigates or even is more important then the lesser adiabatic efficiency.<br /><br />One concern is if the block is iron and the heads alum, certain head gasket issues are more likely to occur than if the heads were iron with an iron block due to differing thermal expansion rates.<br /><br />Also, I'm not a metallurgist and as far as welding goes I'm barely competent enough to get two bolts to stick to each other <img border="0" title="" alt="[Confused]" src="confused.gif" /> , however, iron has got to be easier to repair than AL due to how much easier the metal is to weld on, and just how notoriously difficult it is to work with aluminum as far as structurally.<br /><br />Now as far as the casting process goes, since alum is so much more malleable than iron, I'm sure the costs to manufacture a certain shape especially if cutting is involved are lower with alum, and we all probably know just how much easier it would be to mill/etc. an aluminum part vs. an iron one.<br /><br />still apples: apples I'd rather have an iron head that flows the same vs. an alum. head for some of the reasons I stated. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>FasterDamnit</b> <br /><small>Member # 442</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(2006,0,16,17,9,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Joe,<br />Cast iron repair is much harder than Al. Best process is probably Gas Fusion Welding. <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>JoeT</b> <br /><small>Member # 298</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(2006,0,16,17,18,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> really? I thought most repairs would be a semi-trivial (like for a crack) weld-a-slag and grind on it. but wtf do I know, heh anything outside of JB weld I don't know anything about <img border="0" alt="[Whoo Whooooo!]" title="" src="graemlins/woowoo.gif" /> <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>FasterDamnit</b> <br /><small>Member # 442</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(2006,0,16,17,20,0), 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 JoeT:<br /><strong> really? I thought most repairs would be a semi-trivial (like for a crack) weld-a-slag and grind on it. but wtf do I know, heh anything outside of JB weld I don't know anything about <img border="0" alt="[Whoo Whooooo!]" title="" src="graemlins/woowoo.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Arial"><img border="0" alt="[worship]" title="" src="graemlins/worship.gif" /> JB Weld<br /><br />Yeah, I tossed a nicely ported 289 head when I was quoted up to $300 to fix a crack in the deck. Wish I had known that before all the grinding... <br /> </font> </td></tr> </table></td></tr></table> <br /> <br />
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