Post A Reply
read DMs/my profile
login
|
join CAFords
|
search
|
faq
|
»
Northern California Ford Owners
»
Automotive
»
Tech Talk
»
4.30 gears?
» 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>SteedaGT</b> <br /><small>Member # 2805</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(2003,10,6,12,12,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> I was driving down the freeway last night in a 96 cobra I just bought and I noticed I was at 3,000 rpm at 80 mph in 5th gear, So I called a gear shop and they had some "tech sheet" on gears and they said with the size tires I am running 245/45R17 and the speed I was going I had 4.30 gears, does that sound about right? <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>bunchmyfunky</b> <br /><small>Member # 360</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(2003,10,6,12,28,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> I have the same size tires and turn 3k at 80mph on the stock tach and have 4.10s <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>04ParksRider</b> <br /><small>Member # 786</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(2003,10,6,12,50,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> It sounds like 4.10's to me. <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Blu50Stang</b> <br /><small>Member # 489</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(2003,10,6,13,49,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> The gear calculator I used says 4.30s, however stock tachs aren't always accurate. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>st5150</b> <br /><small>Member # 51</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(2003,10,6,13,58,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> The RaceSystems Peformance Calculator software is good for this kind of stuff:<br /><br /><a href="http://www.racesystems.com/perfcalc/" target="_blank">http://www.racesystems.com/perfcalc/</a><br /><br /><br />To use it to solve your problem, run the porgram and click tire/grear.<br /><br /><br />RPM= 3000<br /><br />MPH = 80<br /><br /><br />Tire diameter = 26" (you really need to accurately measure this with a ruler yourself)<br /><br /><br />The gear ratio it'll give you is 2.9. <br /><br /><br />Remember this is the final drive gear ratio and:<br /><br />Final drive gear ratio = rear end gear ratio X tranny gear ratio<br /><br /><br />In this case your tranny ratio is 0.67 in 5th gear so we have:<br /><br /> 2.9 = rear end gear ratio X 0.67<br /><br /><br />thus<br /><br /> rear end gear ratio = 2.9 / 0.67<br /><br />giving us<br /><br /> rear end gear ratio = 4.30<br /><br /><br />Now normally I would have just done the math and replied with a simple "4.30's if the numbers you gave me are correct" and not bothered revealing the secret to my mojo <img border="0" title="" alt="[Wink]" src="wink.gif" /> <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>RO2USH</b> <br /><small>Member # 2002</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(2003,10,6,13,59,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Suffice it to say, you don't have stock gears. I would say that you probably have 4.10's, but, like he said, Stock Tach's aren't always right. The only way you are really going to be able to tell is by opening up your diff, and counting the teeth. As long as your speedo is corrected for the gears, then I wouldn't worry too much about it. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>stoauto</b> <br /><small>Member # 2803</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(2003,10,6,14,2,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> aint no secret <img border="0" alt="[patriot]" title="" src="graemlins/patriot.gif" /><br /> <br /> <small>[ November 06, 2003, 02:03 PM: Message edited by: stoauto ]</small> <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Blu50Stang</b> <br /><small>Member # 489</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(2003,10,6,14,6,0), 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 RO2USH:<br /><strong> The only way you are really going to be able to tell is by opening up your diff, and counting the teeth. As long as your speedo is corrected for the gears, then I wouldn't worry too much about it. </strong></font><hr /></blockquote><font size="2" face="Verdana, Arial">Opening the diff, counting teeth and dividing the #'s into each other is the only way of knowing for sure. If he doesn't want to do that, he can use the gear calculator and check it by getting under the car(jacked and supported by stands) and turning one of the rear wheels 1 complete rotation and counting how many revolutions the driveshaft makes(a little over 4 turns=4.10s a little over 4 and a quarter turns=4.30s).<br /> <br /> <small>[ November 06, 2003, 02:07 PM: Message edited by: Blu50Stang ]</small> <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Rev Happy</b> <br /><small>Member # 661</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(2003,10,6,17,6,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> You have 4.30s...<br /> <br /> <small>[ November 06, 2003, 05:09 PM: Message edited by: Rev Happy ]</small> <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>SteedaGT</b> <br /><small>Member # 2805</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(2003,10,6,19,9,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> 4.10 or 4.30--don't fear the gear right? Its got alot of balls off the line that all I have to say! <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Blu50Stang</b> <br /><small>Member # 489</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(2003,10,6,19,12,0), 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 SteedaGT:<br /><strong> 4.10 or 4.30--don't fear the gear right? Its got alot of balls off the line that all I have to say! </strong></font><hr /></blockquote><font size="2" face="Verdana, Arial">If you fear the gear, we can trade rear ends(your 4.whatevers for my 3.27s) <img border="0" title="" alt="[Big Grin]" src="biggrin.gif" /> <img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" /> <img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" /> <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>SteedaGT</b> <br /><small>Member # 2805</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(2003,10,6,19,27,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> HA HA HA nope <img border="0" title="" alt="[Razz]" src="tongue.gif" /> <br /><br />Also ross just ordered the steeda G-track suspension<br /> <br /> <small>[ November 06, 2003, 07:27 PM: Message edited by: SteedaGT ]</small> <br /> </font> </td></tr> </table></td></tr></table> <br /> <br />
Questions/Requests/Suggestions? email CAFords
Fueled by
Ford Mustang Owners
on CaliforniaFords.com
