Am I correct in believing the tC fuel pressure is 45 psi?

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For the tC with a stock fuel set-up you can range between 35-65 psi those are your safe zones in pressure while cruising.
On idle you should be at around 20 psi these of course are when the engine has come to operating temp.

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Stock is 44-50 idle, 21 psi hold. (Motorage)

 

well with nitrous applications you have to use the psi of ur fuel pressure to figure out which jet sizes to use... i used 45 psi... is this correct?