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Old 01-07-2016, 10:54 PM   #29
clinebarger
Senior Member
 
Join Date: May 2009
Location: No longer here
Posts: 6,255
Re: 4L80E & TH400 Tech.

A Boost Valve & enlarging the feed holes will work, And....You are correct, Do not block Accumulators with a stock to 2800 stall converter.


For Non-Performance-Stock converter transmission orifice sizing, Do Not go bigger than a 50% "Area" increase over the Stock diameter! Shifts will get pretty rough if you do.

Stock 10% 20% 30% 40% 50%
0.040 0.042 0.044 0.046 0.047 0.049
0.045 0.047 0.049 0.051 0.053 0.055
0.050 0.052 0.055 0.057 0.059 0.061
0.055 0.058 0.060 0.063 0.065 0.067
0.060 0.063 0.066 0.068 0.071 0.073
0.065 0.068 0.071 0.074 0.077 0.080
0.070 0.073 0.077 0.080 0.083 0.086
0.075 0.079 0.082 0.086 0.089 0.092
0.080 0.084 0.088 0.091 0.095 0.098
0.085 0.089 0.093 0.097 0.101 0.104
0.090 0.094 0.099 0.103 0.106 0.110
0.095 0.100 0.104 0.108 0.112 0.116
0.100 0.105 0.110 0.114 0.118 0.122
0.105 0.110 0.115 0.120 0.124 0.129
0.110 0.115 0.120 0.125 0.130 0.135
0.115 0.121 0.126 0.131 0.136 0.141
0.120 0.126 0.131 0.137 0.142 0.147
0.125 0.131 0.137 0.143 0.148 0.153

**I have the chart spaced correctly in my reply, But the site will NOT take it without spacing it funny? I hope you can read it.....***

Last edited by clinebarger; 01-07-2016 at 10:59 PM.
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