my basic diagram, but on my relay i have another wire right in the middle labeled 87a...what do i do with it?

 

depending on the relay, 87a is either energized with the 87 terminal or its energized when the terminal relay isnt activated. there should be a little diagram on the top with a switch either 1) going to both 87 and 87a or 2) flipping between the 87 and 87a. if you only need 1 output, just put some tape over it or something.

- you dont need the ground wire on the switch, but it wont hurt

other than that it looks fine

 

the more i look at the diagram the more it doesn't look right to me...that is per cold fusions site...

this is how NX says to do it...
http://www.nitrousexpress.com/Instructions/heater.pdf

 

the only difference in theirs is they put the pressure switch between the toggle switch and the 86 pin and just grounded the 85 pin. Yours will function exactly the same way. it doesnt matter where you break the circuit with the pressure switch on the 86-85 path. the relay wont activate unless 86 has power and 85 is grounded (or vice versa), whether you break the power side or ground side makes no difference.

 

all heater elements are the same right? i know the ones i've installed in the past, i did it the way NX recommended it. if it's ok i think i'll do this one the same way

 

thanks bro!

 

ive never worked with bottle heaters (but ive done a ton of stuff with wiring and relays), but as long as the current doesnt exceed the fuse (or wiring for that matter) it should be fine. Lets say you have 12v at the heater, and its fused for 30a, 12*30 = 360w. So as long as you have less than a 360w heater it should be fine....but if you are pulling 30 amps I would use at least 12 gauge wire, more likely 10a. Whats the rating on your heater?