Installed a KC code vb in my car tonight that Chris at CK gave me for feedback. WOT 1-2 shift is at roughly 6000 rpm. 2-3 is at 5800. This is a killer set up for a 130mph TR. The vb mods are as follows and are for a dual fed direct setup:
accumulator valve spring replaced with CK's
line bias replaced with CK's
3-2 control valve locked out so it cant stroke
stock BR governor
CK seperator plate
MTV up spring removed
.500 boost valve
If you wanted to lower the shift points at WOT you could simply replace the light BR code secondary weight with a medium weight from a KZ code vb. This will knock it back a few hundred rpm at WOT. Others used the medium secondary weight but im not sure which codes. Anyone else with this info can chime in. KZ is an Olds 442. Chris reported that the KT code is a very similar calibration and had the same shift points. I may clip a coil or two off the 1-2 shift valve spring to get the 1-2 shift down to 5700-5800. I have a 212-212 cam and a decent set of ported iron heads. I also run a very efficient 9.5" PTC converter that slips in the low 4% high 3% range at 5800 rpm. If your converter is less efficient you may need to run the medium governor weight to avoid over revving. Keep in mind if the converter is more efficient then the driveshaft speed will be higher for a given engine rpm. This means that the governor pressure will be higher and it will shift earlier. With a higher converter slip % the governor pressure will be lower and it will shift at an even higher engine rpm. If in doubt use the medium secondary weight and remove weight from it as needed till you achieve the ideal shift point. You may want to clip a coil off the 1-2 shift valve spring to lower that 1-2 shift rpm a little.
Chris, thanks for the opportunity with this vb.
accumulator valve spring replaced with CK's
line bias replaced with CK's
3-2 control valve locked out so it cant stroke
stock BR governor
CK seperator plate
MTV up spring removed
.500 boost valve
If you wanted to lower the shift points at WOT you could simply replace the light BR code secondary weight with a medium weight from a KZ code vb. This will knock it back a few hundred rpm at WOT. Others used the medium secondary weight but im not sure which codes. Anyone else with this info can chime in. KZ is an Olds 442. Chris reported that the KT code is a very similar calibration and had the same shift points. I may clip a coil or two off the 1-2 shift valve spring to get the 1-2 shift down to 5700-5800. I have a 212-212 cam and a decent set of ported iron heads. I also run a very efficient 9.5" PTC converter that slips in the low 4% high 3% range at 5800 rpm. If your converter is less efficient you may need to run the medium governor weight to avoid over revving. Keep in mind if the converter is more efficient then the driveshaft speed will be higher for a given engine rpm. This means that the governor pressure will be higher and it will shift earlier. With a higher converter slip % the governor pressure will be lower and it will shift at an even higher engine rpm. If in doubt use the medium secondary weight and remove weight from it as needed till you achieve the ideal shift point. You may want to clip a coil off the 1-2 shift valve spring to lower that 1-2 shift rpm a little.
Chris, thanks for the opportunity with this vb.
