{"id":416,"date":"2019-09-09T13:38:25","date_gmt":"2019-09-09T13:38:25","guid":{"rendered":"https:\/\/harristuning.com\/Tbi\/?page_id=416"},"modified":"2019-09-09T14:39:48","modified_gmt":"2019-09-09T14:39:48","slug":"speed-calculator","status":"publish","type":"page","link":"https:\/\/harristuning.com\/Tbi\/speed-calculator\/","title":{"rendered":"SPEED CALCULATOR"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">I created this page to help customers with gear selection.&nbsp; Doesn&#8217;t matter how much power your motor makes if you have poor gearing where that engine isn&#8217;t in its powerband then its still going to be miserable or lackluster to drive.&nbsp; Up to 2500 rpms @ 70mph your not turning an excessive rpm and with most overdrive transmissions you can run a lot more gear than came stock and if you change tire size you need to factor in that affect on the overall gearing affecting that rpm number. I chose 70mph as that is a good cruise speed.&nbsp; if you run faster you know your going to be guzzling fuel and well none of us like to drive slower.&nbsp; Going to put some common transmission gears ratios here for you so that you can play with the calculator.&nbsp; I use this to calculate shift points for the computer controlled transmissions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">700r4 4L60E ratios: 3.06, 1.63, 1,&nbsp; .70<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4L80E&nbsp;ratios 2.48, 1.48, 1, .75<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">TH400 ratios 2.48, 1.48, 1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">TH350 ratios 2.52, 1.52, 1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NV3500 5spd manual ratios.&nbsp; 4.02, 2.32, 1.40, 1, .78<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NV4500 5spd manual ratios 1992-94 1st gear 6.34 1995+ 5.61,&nbsp; 3.04, 1.67, 1, .75<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SM465 4spd manual ratios 6.54, 3.57, 1.57, 1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><style>@media (max-width:480px){#cp_calculatedfieldsf_pform_1{min-height:1766px;}}@media (max-width:768px){#cp_calculatedfieldsf_pform_1{min-height:1121px;}}@media (max-width:1024px){#cp_calculatedfieldsf_pform_1{min-height:1116px;}}@media (min-width:1024px){#cp_calculatedfieldsf_pform_1{min-height:1080px;}}<\/style><form name=\"cp_calculatedfieldsf_pform_1\" id=\"cp_calculatedfieldsf_pform_1\" action=\"https:\/\/harristuning.com\/Tbi\/speed-calculator\/\" method=\"post\" enctype=\"multipart\/form-data\" onsubmit=\"return fbuilderjQuery.fbuilder.doValidate(this);\" class=\"cff-form no-prefetch  cff-form-2\"  data-nonce=\"72e80e548e\">\n<input type=\"hidden\" name=\"cp_calculatedfieldsf_pform_psequence\" value=\"_1\" \/>\n<input type=\"hidden\" name=\"cp_calculatedfieldsf_id\" value=\"2\" \/>\n<input type=\"hidden\" name=\"cp_ref_page\" value=\"https:\/\/harristuning.com\/Tbi\" \/>\n<pre style=\"display:none !important;\"><script data-category=\"functional\" type=\"text\/javascript\">form_structure_1=[[{\"form_identifier\":\"\",\"name\":\"fieldname1\",\"shortlabel\":\"\",\"index\":0,\"ftype\":\"fnumber\",\"userhelp\":\"\",\"userhelpTooltip\":false,\"csslayout\":\"\",\"title\":\"Tire Width\",\"predefined\":\"225\",\"predefinedClick\":false,\"required\":true,\"readonly\":false,\"size\":\"small\",\"thousandSeparator\":\"\",\"decimalSymbol\":\".\",\"min\":\"165\",\"max\":\"385\",\"formatDynamically\":false,\"dformat\":\"digits\",\"formats\":[\"digits\",\"number\",\"percent\"],\"fBuild\":{},\"parent\":\"\"},{\"form_identifier\":\"\",\"name\":\"fieldname2\",\"shortlabel\":\"\",\"index\":1,\"ftype\":\"fnumber\",\"userhelp\":\"\",\"userhelpTooltip\":false,\"csslayout\":\"\",\"title\":\"Aspect 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Height\",\"predefined\":\"\",\"required\":false,\"size\":\"medium\",\"toolbar\":\"default|mathematical\",\"eq\":\"fieldname1*fieldname2*2\\\/2540+fieldname3\",\"suffix\":\"\",\"prefix\":\"\",\"decimalsymbol\":\".\",\"groupingsymbol\":\"\",\"readonly\":true,\"hidefield\":false,\"fBuild\":{},\"parent\":\"\"},{\"form_identifier\":\"\",\"name\":\"fieldname5\",\"shortlabel\":\"\",\"index\":4,\"ftype\":\"fnumber\",\"userhelp\":\"\",\"userhelpTooltip\":false,\"csslayout\":\"\",\"title\":\"Differential Gear Ratio\",\"predefined\":\"3.42\",\"predefinedClick\":false,\"required\":true,\"readonly\":false,\"size\":\"small\",\"thousandSeparator\":\"\",\"decimalSymbol\":\".\",\"min\":\"2\",\"max\":\"6\",\"formatDynamically\":false,\"dformat\":\"digits\",\"formats\":[\"digits\",\"number\",\"percent\"],\"fBuild\":{},\"parent\":\"\"},{\"form_identifier\":\"\",\"name\":\"fieldname6\",\"shortlabel\":\"\",\"index\":5,\"ftype\":\"fnumber\",\"userhelp\":\"Example is the .70 30% overdrive 4th gear ratio of a 700r4 4L60e but for whatever transmission your using and whichever gear you want to plug numbers in for you can do so\",\"userhelpTooltip\":false,\"csslayout\":\"\",\"title\":\"Transmission Gear Ratio\",\"predefined\":\".70\",\"predefinedClick\":false,\"required\":true,\"readonly\":false,\"size\":\"small\",\"thousandSeparator\":\"\",\"decimalSymbol\":\".\",\"min\":\"\",\"max\":\"\",\"formatDynamically\":false,\"dformat\":\"digits\",\"formats\":[\"digits\",\"number\",\"percent\"],\"fBuild\":{},\"parent\":\"\"},{\"form_identifier\":\"\",\"name\":\"fieldname7\",\"shortlabel\":\"\",\"index\":6,\"ftype\":\"fnumber\",\"userhelp\":\"\",\"userhelpTooltip\":false,\"csslayout\":\"\",\"title\":\"Engine RPM\",\"predefined\":\"2100\",\"predefinedClick\":false,\"required\":false,\"readonly\":false,\"size\":\"small\",\"thousandSeparator\":\"\",\"decimalSymbol\":\".\",\"min\":\"\",\"max\":\"\",\"formatDynamically\":false,\"dformat\":\"digits\",\"formats\":[\"digits\",\"number\",\"percent\"],\"fBuild\":{},\"parent\":\"\"},{\"dependencies\":[{\"rule\":\"\",\"complex\":false,\"fields\":[\"\"]}],\"form_identifier\":\"\",\"name\":\"fieldname8\",\"shortlabel\":\"\",\"index\":7,\"ftype\":\"fCalculated\",\"userhelp\":\"This speed listed does not factor in any converter slippaged with automatic transmissions when no converter lockup.  Converter slippage can easily be 300-500 rpms for those transmissions.\",\"userhelpTooltip\":false,\"csslayout\":\"\",\"title\":\"Speed\",\"predefined\":\"\",\"required\":false,\"size\":\"medium\",\"toolbar\":\"default|mathematical\",\"eq\":\"(fieldname7*fieldname4)\\\/(fieldname5*336)\\\/fieldname6\",\"suffix\":\"\",\"prefix\":\"\",\"decimalsymbol\":\".\",\"groupingsymbol\":\"\",\"readonly\":true,\"hidefield\":false,\"fBuild\":{},\"parent\":\"\"}],{\"0\":{\"title\":\"Speed Calculator\",\"description\":\"The form below gives the speed at a specific rpm for transmission gear, rearend ratio and tire size\",\"formlayout\":\"top_aligned\",\"evalequations\":1,\"formtemplate\":\"\",\"evalequationsevent\":2,\"autocomplete\":1,\"persistence\":0,\"customstyles\":\"\"},\"formid\":\"cp_calculatedfieldsf_pform_1\"}];<\/script><\/pre>\n<div id=\"fbuilder\">\n\t\t<div id=\"fbuilder_1\">\n\t\t<div id=\"formheader_1\"><\/div>\n\t\t<div id=\"fieldlist_1\"><\/div>\n\t\t<div class=\"clearer\"><\/div>\n\t<\/div>\n<\/div>\n\t<div id=\"cp_subbtn_1\" class=\"cp_subbtn\" style=\"display:none;\">Submit<\/div><div class=\"clearer\"><\/div>\n\t<input type=\"hidden\" id=\"_cpcff_public_nonce\" name=\"_cpcff_public_nonce\" value=\"abf129c55c\" \/><input type=\"hidden\" name=\"_wp_http_referer\" value=\"\/Tbi\/wp-json\/wp\/v2\/pages\/416\" \/><input type=\"hidden\" name=\"cff_form_start_time\" value=\"d3CRQs49m864SPmdsxalCA==\"><\/form>\n\t<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I created this page to help customers with gear selection.&nbsp; Doesn&#8217;t matter how much power your motor makes if you have poor gearing where that engine isn&#8217;t in its powerband then its still going to be miserable or lackluster to drive.&nbsp; Up to 2500 rpms @ 70mph your not turning an excessive rpm and with &hellip; <a href=\"https:\/\/harristuning.com\/Tbi\/speed-calculator\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">SPEED CALCULATOR<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"nf_dc_page":"","om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-416","page","type-page","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - 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