No he didn't offer me any numbers other than to say that if there wasn't enough oil reaching the oil filter I may not find out in time because the oil pressure would stay up because of where the pressure gauge picks up. (?). If I try out the remote first I want to make sure I have a pressure gauge on the remote oil mount. But what side? coming in or going out?
What does that statement from the Wix guy mean? LOL Maybe he means it would take too long for engine pressure to get up due the line being long? That may make sense, and may be what Del is worried about.
You have 2 things working for you:
- The anti drain back valve in the filter will keep most of the oil in the system beyond the filter up to the passenger side gallery.
- That also tends to keep the oil in the lines up to the filter when sitting.
For grins, I computed the volume in one 5' long 1/2" ID oil line; it works out the about 0.2 gallons. With typical oil pump pumping around 1.5-2 GPM at low RPM''s it could take as much as 5-7 seconds to completely fill that line if it was totally empty. I would not expect the input line to really drain out all that much with a filter with an anti-drainback valves. But I put it out there for you consider. If it worries you, then prime the engine oiling system in-car after the mod to pre-fill that line
I've always used something like the PH8A or WIX 51515 filters that have anti-drainback valves in them, and never have seen slow oil pressure build up. The current 340 shows almost instant oil pressure with 3' lines to and from the remote filter mount on the front end of the passenger side frame rail. That is a lower mount location than you are thinking of and so may help keep the oil in the filter input line. The oil pump was new at the recent rebuild. All my remote installations are in cases where the pumps have been renewed and well maintained. That is probably true for a lot of racers.
BTW, the standard oil pressure sensor location is at the output of the filter; it tees off right at where the oil feeds into the engine's main feed passage, which is the passenger side oil gallery. So I really don't see any need to put an extra gauge in; that location is the worst case for seeing time to real internal oil pressure.
FWIW: I take all large corporation tech line advice with a grain of salt; unless they can cite exact numbers, I tend to not accept it crate blanche. That is because:
- They perceive a larger liability for themselves than a small shop. I'll take advice far quicker from an experienced racer or a reputable shop operator.
- When you ask a question like this to a large tech support person, you put them on the spot. They will tend to give a conservative answer to protect themselves.
- Who knows how much real engine experience this guy has? It is kind of like the parts store counter jockeys; some of them dispense a lot of jargon and stuff they pick up rather than actually working on stuff. I'd trust the answers from the experienced builders and racers who use these things far, far more.