74u

iTrader: (9)

I have dual regulators with small (~1.5") liquid filled FP gauges on each. I have one set at ~6.5psi feeding the carb, the other at ~8psi feeding the N2O. Once the car warms up the pressure on both gauges drops to ~3-4psi???

I've tried turning the pressure back up to my desired range, but then on the next cold start my pressure is sky high...like 12-15psi.

Should I throw my gauges in the trash? Or should I adjust when cold, hot, ???

Thanks for the advice guys!

Doug G

Is this a dead headed system ?

74u

iTrader: (9)

Yes...single 8an from the cell to just before the reg's. Then splits into two 6an's going into each Holley deadhead reg.

Doug G

Sounds like it sucks air when pump/car is off and then traps it ?

89gmcs15

iTrader: (7)

My fluid filled pressure gauge was the issue. Replace them with dry gauges and call it good

snook

iTrader: (1)

The liquid filled guages are fine as long as they dont get hot. As soon as they are heat soaked, the pressure goes up or down. I had one that went up, the other went down, lol

newschool72

iTrader: (12)

The liquid filled gauge on my old school 68 camaro is on one of those Jegs holley kits that puts the gauge next to the carb w one 8AN going in and 2 6AN coming out to the carb bowls. I have seen it go as low as 1 psi ( normal is 7psi ) when it gets hot. I can hammer the gas and pull clean to 7000 rpms without a sputter at 1 psi, so Im pretty sure its a gauge issue,LOL.