bypass mode??

[dailydriver]

Can one tell by their oil pressure gauge when they are in filter bypass mode when going WOT, at near red line conditions when the oil is VERY hot??

In other words; my op spikes up to ~80 psi at WOT/red line when the oil is VERY hot (it is at 40 psi at idle, and 45-50 psi at steady state/cruise/lower revs at this temp), and it does not come back down for a couple of seconds after the WOT event.

Was I in bypass, or would the exact opposite be true (i.e.; the op would be LOWER in a hot oil temp, WOT/red line bypass event)?

I still have the stock/factory LS1 gerotor (I'm guessing positive displacement) oil pump.

Anyone?

 

[Donald]

I am not sure you can tell from the oil pressure gauge.

I read some place that you could tell by sensing a lower than expected temp when feeling the outside of the oil filter. That might be true if the filter was totally blocked and was always in bypass mode.

 

[expat]

I say No

the difference would be too small to see on an automotive gauge.

 

[widman]

The pressure gauge won't tell you anything. It is only measuring what is there, and as the filter clogs (for the current viscosity), the valve opens.

The filter temperature might tell you unless the valve (as most are) is at the opposite end from the inlet.

 

[Nate1979]

Read Jim Allen's post here:
https://bobistheoilguy.com/forums/threads/question-about-filter-bypass.200435/

Very interesting.

 

[ZeeOSix]

Only way to really know if the filter is going into bypass is to have an oil pressure gauge before and after the filter to measure the delta-P across the filter.

With just a pressure gauge after the oil filter, the only thing you might be able to determine is if the oil filter is becoming more restrictive. Could tell by seeing a little less oil pressure at redline as compared to when the filter was new, but this can only be determined if the oil pump is going into pressure relief.

Temperature of the oil filter shouldn't change enough to detect when it goes into bypass mode. The incoming oil is the same temperature, and the temperature distribution of the can wouldn't really change IMO if the oil inside took a slightly different path through the filter.