AR7E - Alcester Racing 7's Equipe
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Installation ConsiderationsThese installation notes relate to Rover K-series cars fitted with an Apollo oil/air separator and the Caterham 'remote filter mounting kit' (RMK in Caterham-speak)- such as the Academy race series cars. The fine detail might vary depending on the specification of your 7, but the broad strokes are certainly common. Oil Pressure (OP) Sensor RelocationThe main consideration here is that the RMK locates the existing pressure sensor in a vulnerable position as shown here:
<Click Image for Full Size> The old OP sensor is the brass coloured cylinder in the center of the picture - it is basically hanging in the breeze beneath the car by the sump and it's easy for it to get bashed or corroded leading to dodgy readings (as if it wasn't bad enough already...) Incidentally, you can just see the back of the RMK oil filter mount on the RHS of the picture. So, ideally, we want to move the new SPA sensor to a place of safety - the easiest way to do this is to place it at the end of a length of aeroquip hose - and this is where some of the annoying little issues creep in.
<Click Image for Full Size> Above - The oil hose relocates the sensor out of danger.
<Click Image for Full Size> Above - Apollo tank on left - OT sensor bottom-middle of picture. SPA OP sensor tie-wrapped to inner chassis rail (center of picture) Basically, we know the thread fitting for the new SPA OP sensor (it is a male '1/8 BSP') - and after a *lot* of fruitless investigation and due to a lack of believable and consistent information, we ordered two female 1/8 BSP to hose connectors, 300mm of hose and a collection of male 1/8 BSP to male XYZ connectors (one each of 1/8 BSP->1/8BSP, 1/8 BSP->1/8 NPT and 1/8 BSP->M12x1.5). In the end, it turned out that the old OP thread was a male 'M12x1.5'. So we just need a 300mm hose with female 1/8 BSP and male M12x1.5 right? Unless you are *certain* of the old OP thread, we'd probably advise you to follow this overkill-but-we're-covered approach too. ...and order the SPA gauge first and take it along to where ever you're getting your hose connectors from - we've found that although the SPA thread is *indeed* 1/8BSP, not all 1/8BSP female hose connectors are created equal and some foul the sensor (...which do you think we got... answers later...) Oil Temp (OT) SensorNo problems for us here - most temp sensors seem to be identical - both the old Caterham sensor and the new SPA sensor are 1/8 NPT (tapered thread). The OT sensor position is fine too - ours is mounted in the side of the Apollo tank. Instrument MountingThe SPA gauge is supposed to be a standard 52mm diameter. But it wouldn't fit the old hole - and turned out to be approximately 53mm in diameter. As you will see later, with an aluminium dash, this wasn't much of an issue - but YMMV if you've got a swanky carbon version... You will probably want to take advantage of the SPA external alarms though - it's up to you whether you go for a big 'idiot light' or tidier LEDs - but whichever you choose, you will need to mount them in the dash somehow or other The SPA gauge has a small remote mounted button for configuration etc. - potentially another hole in the dash... |
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