Good-Win Racing Mazda Performance Parts

Longacre Accutech SMI Oil Pressure Gauge (0-100 psi.)


Miata 1990-2005 · Gauges

Part Number: 61-1616

Application: 1990-2005

Price: $126.99


Longacre Accutech SMI Oil Pressure Gauge (0-100 psi.)
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Longacre's innovative Accutech SMi gauge is a 2-5/8" Stepper-Motor-style gauge that uses a small electronic motor that turns a fraction of a rotation to drive the pointer. Much more precise then traditional mechanical gauges, many pro-racing teams are switching to Stepper-Motor gauges to improve accuracy.

The oil pressure gauge includes ultra bright LED warning lights that are easily set by the user and include 3 total set-points to make sure you notice problems before they become disastrous. At the first point, the single LED-light will illuminate; at the second, it will flash; and at the third, the light will continue to flash AND the whole backlight will begin to flash to warn you that something really bad is about to happen!

The kit includes everything necessary for installation - heavily insulated wiring, soldered/heat-shrinked terminals, lights, and senders. Oil pressure gauge reads from 0-100 psi.

Watch a short video from Longacre on this gauge:

Other benefits include:

-2-5/8" gauge with molded polycarbonate/ABS case.

-Included electronic sensor drives the gauge - no oil or fuel in the driver s compartment for safety.

-Easy-to-Read thru-the-dial LED backlights and an illuminated pointer.

-Self testing - Pointers swing full scale and all LEDs light up when car is started

-Can be used with 12 and 16 Volt negative ground systems.


The Accutech line of gauges offer excellent value for track and street customers. Unlike most gauges, the sensors included with Accutech gauges are pre-wired and sealed against the weather. This is especially important for accurate readings from your sensors.


These are the gauges I use in my own track car after a long period of going through several other brands. I was really happy and relieved when I found Longacre's Accutech line of gauges; Excellent quality, very precise gauges that you can rely on at a very reasonable price.

A very clean installation example from our friend Erik Bruner of the SMI gauges in his NB. In his own words, the 2 5/8" gauges drop right into the vent hole after you remove the vent. It's as if they were made for that location:

Another example of the Accutech gauges in a customer's NB:

*** Product images may differ from actual product appearance ***


As you can see, i placed another order for more parts for my car. I wanted you to know that I'm pleased at how quickly the wheels/tires came, and the radiator too. Great service and response time.

-- Jeff D.

After reading many other positive reviews on both the GWR and Miata forums I finally decided to buy this product. My main concern for many months was whether or not I was up to the task of installing the header. But with the excellent instructions on Brian's forum as well as several Miata forum threads it turned out easier than I expected. After receiving notice that the header would arrive on a Friday afternoon, I began the disassembly process. After about 3 hours I had the stock manifold out. Later that afternoon the new catted header arrived right on schedule. And it is a thing of beauty. I opted for the stainless version. Installation on Saturday morning took another 3 hours, although I could have shaved some time off of that but I was actually enjoying the process of double checking torque values and cleaning up my engine compartment. I already have the GWR catted midpipe, so that connection was a snap. I put everything back together, reconnected my battery, and went for a drive. NO CODES! Nice throaty sound with my RSII muffler, and a significant boost in power and low/mid torque. Another happy camper here. I since have added a M-E tune and I feel I have realized all of the gains that Brian has achieved on his 2012 project Miata. I've put several hundred miles on my Miata since the install with zero problems. This is the car that Mazda should have built all along. Thanks Brian.

-- Ron P.