Im getting ready to bolt on a supercharger soon and ive got everything ready except for the check valve that you put on the vacuum modulator valve. Does anybody know what size line is used for the vacuum modulator valve and who sells one. All the check valves that im finding in stores have different sizes on each end.
You might want to try One way check valve GM # 14047619 Those have the same size on each end. They use that on GN/TTYPE's. I don't know off hand what size they are....sorry. I've seen other check valves in the "HELP" section at autopart stores. They seem to have different sizes on each side. ElectraJim
Vent the backside of the checkvalve or it will hold vacuum and the trans won't upshift under WOT. Another option is to use a mechanical modulator. Search for TH400 in the tranny section of www.turbobuick.com
