New Melling Performance Oil Pump Coming

[Vash]

I'm sorry I answered on my phone and just the quote, I'm now on the computer.

Vash, that's great that you got the ball rolling on this product.

If the Melling and the TSS was available at the time I needed it and the hand full of people that I trust with recommendations said either one is good,
I would have gone with who ever could get the gears to me the fastest.
I don't know if I would have gone for the pump housing, since I had such low miles on the engine.

I don't see the high pressure pump on Summit for the 6.2L, only the 10340BR for the 4.6L and 5.4L

You’ll have to call Summit. The product isn’t in their normal ordering system yet, but the SKU is available to drop ship. I called to verify. The rep on the express line for people who know what part number they want couldn’t find anything. He transferred me to a “Sales Rep” who said the item was available for drop ship and quoted me the item price. This was for 10397-BR. My guess it their online order system will be updated at some point, but phone inquiry is the only way at this time.

---------- Post added at 06:53 PM ---------- Previous post was at 06:46 PM ----------

@HAP MTF is 100% right. My understanding is that the OEM “oil pressure sending unit” is more of a switch than a true pressure sensing unit. Like you said, it pretty much only shows low, medium, and high. Basically a dumbed down idiot light.

He made a good catch on the oil PID not existing. I totally overlooked that. Definitely would make datalogging for oil pressure impossible.

 

[HAP]

WTF?? I'm so disappointed in that! No wonder everyone talks about being too late if you see oil pressure loss. I always wondered why one would not notice a declining oil pressure... that is some weak shit there FORD.

[/COLOR]

Wait, so our truck's oil pressure gauge will not vary with the actual pressure? Only shows mid range if pressure is present??

R,
HAP




That is correct

 

[Vash]

@HAP Blame all the past idiots who complained to dealers about their fluctuating oil pressure. They didn’t know anything about pressure varying with RPM and other variables. Ford saw fit to “fix” the problem by giving them a “gauge” that stays rock steady until there REALLY is a PROBLEM!

 

[HAP]

Ok, when you say Low, Med and High, does the gauge reflect those with needle deflections? Or, if its not "Medium" a warning will occur?
Does the manual describe the operation that way? I have not checked to see what it says...

[/COLOR] @HAP MTF is 100% right. My understanding is that the OEM “oil pressure sending unit” is more of a switch than a true pressure sensing unit. Like you said, it pretty much only shows low, medium, and high. Basically a dumbed down idiot light.

 

[Truckzor]

WTF?? I'm so disappointed in that! No wonder everyone talks about being too late if you see oil pressure loss. I always wondered why one would not notice a declining oil pressure... that is some weak shit there FORD.

Agree. This is why I have so many gauges in my truck! I want some advanced warning if a problem is developing.

@HAP Blame all the past idiots who complained to dealers about their fluctuating oil pressure. They didn’t know anything about pressure varying with RPM and other variables. Ford saw fit to “fix” the problem by giving them a “gauge” that stays rock steady until there REALLY is a PROBLEM!

Yep. That is exactly why they did it.

I first experienced it in a '93 Cobra that had an idiot gauge. Really pissed me off not knowing what my oil pressure really was.

 

[Vash]

@HAP I’ll quote a rough explanation of how it works. Although, ignore the PSI values used. Honestly, it’s really more of an ON/OFF vs Low, Medium, or High.

On an idiot light setup, the oil pressure switch is closed (direct connection to ground) when there is no oil pressure and open (no connection to ground) when there is oil pressure above whatever level the switch is preset for. Usually this is a very low value - around 5 PSI or so. The idiot light is wired from the ignition switch, though the light, and then out to the oil pressure switch - pretty much the same as the gauge, except with the light in place of the gauge. The gauge also has an extra ground connection on it, but you get the idea. Power -> gauge or light -> sender or switch -> ground to engine as needed. So what happens when you mix a oil pressure switch with the gauge? With the engine off (low or no oil pressure) the gauge properly reads low/no oil pressure. But with the engine running and oil pressure present, the gauge pegs to the far right, and would most likely burn out the innards of the gauge if left that way for very long. To add some resistance in the circuit to give a decent "middle of the gauge" reading and keep the magic smoke in the wires (if you don't get this joke, you haven't screwed up any wiring and witnessed a short circuit), Ford added just enough resistance into the circuit so that when the oil pressure switch was closed, the gauge reads mid way - the visual equivalent of around 40 PSI or so. That way most drivers are fooled because they think the gauge is reading right and telling them they have an "about in the middle" oil pressure reading, when in fact, it's just telling them that they don't have critically low oil pressure. If the oil pressure did drop, the oil pressure gauge would suddenly peg to the far left - the visual equivalent of the oil pressure idiot light coming on, but not quite as noticeable. Brilliant.

 

[HAP]

Vash, thanks for the explanation. Sorry if I led you to believe that I was clueless, but, I was so floored by the systems design and operation that I had to make sure I was understanding what was being said. I always thought the oil pressure was exceedingly consistent it its readings and now I know why.
Now all I want in my next mod, is a way to monitor actual pressure.
Thanks all.

PS: still absurd, it's operation/design!!!

@HAP I’ll quote a rough explanation of how it works. Although, ignore the PSI values used. Honestly, it’s really more of an ON/OFF vs Low, Medium, or High.

 

[Dane]

@Truckzor - Brief tangent. What kind of difference do you see in your aftermarket tranny gauge versus the stock? I'm assuming your aftermarket sensor is in the tranny pan?

 

[Truckzor]

@Truckzor - Brief tangent. What kind of difference do you see in your aftermarket tranny gauge versus the stock? I'm assuming your aftermarket sensor is in the tranny pan?

Still running my old gauge set up for now, so no tranny temp yet. Haven't decided what I want to do with the gauge pod.

 

[Dane]

Still running my old gauge set up for now, so no tranny temp yet. Haven't decided what I want to do with the gauge pod.

Old gauge? As in stock?

I'm thinking about just going with this: https://www.autometer.com/universal-triple-2-1-16-dash-pod.html

I need to take some measurements, but it looks promising.

Here's mine, currently (wish that Roush gauge had a black bezel) :