I am going to be running an electric oil pressure gauge with my turbo setup and I have basically one question...

I have ultra-lite 52mm gauge throughout my car and from what I have researched, a good oil pressure gauge for us is one that goes from 0-100psi...

My question is... WHY is there such a huge difference in price between the full sweep ultra-lite oil pressure and the 1/4 sweep one. The cheapest I have found the full sweep with everything included is about $180 and the cheapest I have found the 1/4 sweep is about $50. Why is there such a big difference in the price???

Thank you!

Well one is electric and the other is manual. One will acctually have hot oil running through a line up to the back of the guage and the other will use an electric sender to send the info to the guage.

I edited to the wiki!

No Autometer makes 2 ultra-lite ELECTRIC oil pressure gauge, they both go from 0-100psi but one has a full sweep and the other is a 1/4 and the full sweep costs over 3 times more. Just trying to figure out why.

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full sweep has more increments whithin the gauge to see what pressure you have. 1/4 sweep has 4 measurements with a dash in between each number.

I have the 1/4 laying on my work bench and a full sweep in my car.

Terry

It has to do with the precision of the stepper motor inside the gauge. You need a more sensitive sending unit and the motor has to be able to remain precise over a greater range of motion.

It's not the same gage reading farter, but a completely different gauge.

Personally, I'm using the cheapest Autometer electric oil press. gauge. Works fine for me. I know where my pressure is at idle and under load. If it's outside that range, I am concerned. That said, I would save the money by getting a cheaper oil press. gauge and ensure I had the best O2/EGT/fuel press. instruments I could afford.

Mechanical FTW

~Luke
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I would go with a mechanical one since they are cheaper but I don't exactly like the idea of sending hot oil to the inside of my car haha.

I prefer mechanical. As long as you install it correctly the line will be fine.

Terry