Post A Reply
read DMs/my profile
login
|
join CAFords
|
search
|
faq
|
»
Northern California Ford Owners
»
Automotive
»
Tech Talk
»
Noob question, inspired by glenn
» Post A Reply
Post A Reply
Login Name:
Password:
Message Icon:
Message:
HTML is not enabled.
UBB Code is enabled.
(
how?
)
Instant Emojis
Instant UBB Code
What is UBB Code?
Options
Disable smilies in this post.
<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>87 Saleen</b> <br /><small>Member # 1549</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(2003,8,24,14,54,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Yea well I was reading Glenn's thread and asked myself, why is low compression better then high compression with running a super charger? Does this also apply to any form of boost, like nitrous? I though nitrous liked higher compression? <img border="0" alt="[patriot]" title="" src="graemlins/patriot.gif" /> <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>91 5.0</b> <br /><small>Member # 1527</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(2003,8,24,14,58,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Too much air in the combustion chamber, along with the elevated intake temperatures, due to the blower, can cause pre-ignition. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Primer GR40</b> <br /><small>Member # 476</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(2003,8,24,14,58,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Superchargers get the air hot with lots of boost. Too much heat and compression will lead to pre-ignition. Nitrous cools, it doesnt heat anything up, besides a little more fuel you burn. This is just a guess. <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>93PONY</b> <br /><small>Member # 60</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(2003,8,24,19,14,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> HEAT<br /><br />That's why low compression with boost is desirable. You can only run so much total compression (compression ratio * (boost in AU + 1)) before pre-ignition with a given octane occurs (the higher the octane, the higher temp/slower it burns). This is because whenever you compresses a gas, you heat it up. Heat up the air/fuel mixture too much & it will ignite.<br /><br />N2O works very well with high compression for a couple of reasons. One, is that it is sprayed out at -120F degrees. This cools the intake air charge quite well. Also, with nitrous you're not compressing the air before it reaches the pistons. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>87 Saleen</b> <br /><small>Member # 1549</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(2003,8,24,21,45,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Shaun, you are a beatiful person <img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" /> . <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>mustanggt5091</b> <br /><small>Member # 444</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(2003,8,24,22,18,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Couldnt have said it better myself shaun <img border="0" alt="[patriot]" title="" src="graemlins/patriot.gif" /> <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>91 5.0</b> <br /><small>Member # 1527</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(2003,8,25,8,59,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> So when nitrous is injected, it comes out at 120F? Explain that to me. I'd think it would be a lot cooler since it was going from very high pressure, ~1000psi, to atmospheric pressure. When a something goes from high pressure to low pressure, it gets colder. Same concept as your A/C system. <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <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(2003,8,25,9,13,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Ahhh, 91...that's NEGATIVE 120 degrees.. <img border="0" title="" alt="[Smile]" src="smile.gif" /> <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>91 5.0</b> <br /><small>Member # 1527</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(2003,8,25,10,50,0), 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 JohnB:<br /><strong> Ahhh, 91...that's NEGATIVE 120 degrees.. <img border="0" title="" alt="[Smile]" src="smile.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Arial">Now that makes sense. I was wonderin about that. Shaun is a smart guy, so I was wondering what was goin on. I re-read it and saw the (-) sign this time. Thanks for pointing that out John. <img border="0" alt="[patriot]" title="" src="graemlins/patriot.gif" /> <img border="0" alt="[patriot]" title="" src="graemlins/patriot.gif" /><br /> <br /> <small>[ September 25, 2003, 10:51 AM: Message edited by: 91 5.0 ]</small> <br /> </font> </td></tr> </table></td></tr></table> <br /> <br />
Questions/Requests/Suggestions? email CAFords
Fueled by
Ford Mustang Owners
on CaliforniaFords.com
