100) $cust = $cust / 100; if ($cust) $cust = number_format($cust, 2); $shift = $_REQUEST['shift']; if (! $shift) $shift = 4; $fourlow = $_REQUEST['fourlow']; if (!$fourlow) $fourlow = 1; function between($num, $low, $high) { if($num < $low) return false; if($num > $high) return false; return true; } function dec2hex($dec) { if ($dec < 0) $dec = 0; if ($dec > 255) $dec = 255; return substr("00".dechex($dec), -2); } ?> Effects on engine RPM for various gearing and tire sizes
\n"; } else echo " \n"; } ?>
Tire diameter
\n"; ?> 0) { $cl = 160; $cx = $cl * 0.925; // adjusts the starting point of overload zone $ol = 1.5; // sets how fast we go into overload $bs = $MPH * 44.6 * $Trans[$shift-1] * $fourlow ; // Lower number shifts colors down $off = intval(($bs - $RPM) / (($MPH/22)*$Trans[$shift-1]*$fourlow )); // Lower number expands bands $r=$cl; $g=255; $b=$cl; if ($off > 0) $r = $cl + $off; if ($off > ($cl/1.5)) $b = $cl + ($off-($cl/1.5)); if ($off > $cx) { $adj = 1 - ((($off * $ol) / $cx) - $ol); $g = $g * $adj; $b = $b * $adj; } if ($off < 0) { $g = 384 - $off; $b = $cl - $off; } if ($off < -($cl/1.5)) $r = $cl - ($off+($cl/1.5)); $r = dec2hex($r); $g = dec2hex($g); $b = dec2hex($b); $style = " style='background-color:#$r$g$b'"; } else $RPM=" "; ?>
Gear ratio
" . number_format($Gear,2) . "
>
>4Lo >1st >2nd >3rd >OD
mph

The information on this page is for the 2002-2009 Chevy Trailblazer and GMC Envoy with a 4L60-E transmission.

Increased  power
Standard  duty
Fuel  economy
Drivetrain  overload