boost gauge Question??

[pat24]

ive been looking and i cant seem to find what im looking for but where to i tap the boost line into for my gauge ??

 

[Jc12]

just behind the supercharger against the firewall there is the boost output. I have a line running from there to my FPR and i have it T'd off to my boost gauge. If you google it you should get some images

 

[steezemcqueen]

1st gen or 2nd gen supercharger?

 

[pat24]

its a 2nd gen SC to day i t'd into the line all i got was vac pres when i revved up the truck it goes for 20 to 10 vac never going to boost now i did this in the shop not in the road any idea's im not really sure what i messed up?

 

[steezemcqueen]

It won't go into boost unless the engine it under load.