I just got my fpss and want to hook it up but how do i get the arming pressure ing range.

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94 T/A t-tops, a4 !maf screen shorty headers !cat flows

 

What pressure you set it to depends what kind of N2O system you are running (e.g. - wet or dry) and what your fuel system looks like.

If you are asking how to set the switch, I mount it in a "tee" on my air compressor line, put a VOM meter across the terminals and adjust it until it goes on ands off at the pressure I want.

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Fred
94 Formula A3: 381/TH400/N2O

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11.513@115.59 on motor; 11.162@127.67, 1.643 60' on a 125-shot. Going with a 275-shot this year

 

thanks i have a wet system so about what psi should it shut down?

 

I would suggest hooking up a fuel pressure gauge and monitoring your WOT fuel pressure, then set the fpss about 2 PSI below that. If you find it cuts out too often, drop it another pound or two. If it still cuts out, you need to look into a bigger fuel pump.