So, the TB is in front of the whipple. Is it OK to inject meth infront of the TB?
This means the mist will flow through the blower. Is there a chance for rotor erosion?
Or should I spray after the blower?

 

From what I have read and heard the blower will heat up the methanol and will not allow it to do its job. The best location I have read is right infront of the iat sensor. Depends where yours is located but I would assume it is after the blower right before the air enters the intake manifold.

 

Ryan, how is yours plumbed on your Tahoe? Sig says Direct-Kit 4 Nozzles, please elaborate, and pics will help

 

2 Nozzles down each side with a hard line in between. I think all the nozzle are "5." The nozzles were tapped into the top of the intake and place in between two of the cylinder runners that are on the floor of the intake. I haven't gotten a full log on Hp Tuners yet but I can't see a change when I purge the system showing up on the iat sensor. The meth should be affecting the air after it exits the intercooler. The iat sensor is just a heatsoaking btich. A selenoid had to be placed in between the nozzles and the pump since there is extreme vacum in the intake and would just suck the tank dry.