Gauge

http://www.maplin.co.uk/products/mod...&moduleno=3258

Gauge Fitted
http://images.fotopic.net/?id=4584873&outx=482&oq=0

Probe
http://images.fotopic.net/?id=4584874&outx=482&oq=0
http://images.fotopic.net/?id=4584875&outx=425&oq=0

Hard pipe was drilled & tapped to the probes thread, Probe drilled out to accomadate the gauges probe (threaded probe was a water sensor type ), Gauges probe siliconed into place, Hand Brake blank removed & widened to fit the gauge ..

Temp displayed was from heat soak as the car had been stood still for a while
Saw 12 Degs this Morn rise to 18 with some spirited driving , & around 13 degs this evening rising to 16 degs, shame its not backlit !!! Next stage i think

Dean

 

Nice job..

Did you have the car out in the really hot weather at the weekend?? what were the temps like?

JGM

 

I like it !

 

not very fast tho.

David

 

yes did have the car out over the weekend, Temps were hovering 25 27 on cruise , apart from standing traffic.. but they soon came down once moving

David,
Have been looking for a similar sized unit but faster, the instructions that are inside the box on this 1 said the sampling rate can be set between 1 & 15, How to do it is another factor, This part seems to of been omitted from the sheet. I was looking in the RS catalogue for a faster replacement any recomendations ??

Dean

 

dunno.. but when you find out, let me know..

David

15's is **** all when 1/4mile 'ing.

 

Hey but you would know the before & after Temps @ standstill

 

NIce, be wary though as the probe just siliconed in place will blow out eventually, also its not designed to withstand the rigours of underbonnet. Keep a close eye on it, if you can provide it with mechanical constraint as well then it would be best.

I speak from experience of doing something similar until I cam across the Lascar web site, I use the digital temperature meter they do and a K type fine ptfe wire probe hooked into the intercooler to throttle body pipe, I'll take some pics. Meter is bigger and a bit more expensive but its got built in compensation and is capable of being callibrated to set points for better accuracy. Extremely fast acting. Just installed one to the Sti9. Had one in the '5 until I gave in and fitted a SPA temp/temp meter for charge and egt measurement.

bob

cheers

bob

 

Link for meter

http://www.lascarelectronics.com/pro...94DBA85A8B3F24

bob

 

Thanks Bob, I'll keep an eye on the probe & that meter looks just the job. Think i may have to invest.. Look forward to the pics

Dean

 

got mine from maplins 1 sec sample rate total cost for module, temp probe and the bezel was £7.50 just runs of a 1.5v batt so makes it a bit easier to install

 

I got one, still got the veroboard and push switches I was gonna wire it up with too, in the tool cupboard.

Defaults to 10sec intervals which is required to set alerts or whatever. Can be switched to 1 second intervals by a little circuitry.

J.

 

any idea's as to instal the probe then? as bob said, it may blow out eventually, so what can be done to prevent it? i was thinking of carefully cutting a thread onto the black plastic of the probe, then screwing it into a nut already screwed into hard pipe, with a threaded hole in the centre of it????

 

Thinking about it, I did not drill the threaded probe all the way through so there is no way the gauges probe will blow out, The gauges probe is just contacting the inside of the threaded probe to exchange the temps Etc & held into the threaded probe with silicone.

Dean

Erm , does that make sense !!

 

pmsl, nope!

 

Ok. Tapped into my hard pipe is a standard water probe. The centre of this has been drilled out, leaving just the solid outer shell. Into this has been inserted the probe from the digital gauge & secured with silicone. So the silicone is not direcrly connected to the hard pipe & can therefor not blow out

Dean

 

ahhhhhhhhhhh, wicked! so for what reason did you have a water probe for in a hard pipe? how is this probe sealed up? i realise it's screwed in, but surely it would maybe leak a bit?

 

The water probe was purely to give a good solid fix, It won't leak as it is solid & threadlocked into place.
See here
http://www.camskill.co.uk/products.p...d=m3b11s9p1360.
Imagine. Cut the terminal off the top Drill out the centre , Leaving only the outer shell, screw into tapped hole in hard pipe , Insert gauges probe & secure

Simple ., Just Like Me

 

rotflmfao! quality

 

So the probe is indirectly only measuring the temperature, its actually measuring the temperature of the water sensor, as a general guide thats ok, its not "precise" of course but doesn't need to be as its not providing info for direct action.

The K sensor I used has the tip directly in the air flow so it reacts instantly, even to lift off throttle which kiks up 2-3 degrees for instance. (air flow reduces and so temp rises)

I'll go take some pics later.

bob

 

I use a dual input meter - A$90 from Jaycar at http://www1.jaycar.com.au/productVie...=&SUBCATID=509

It allows measurement of i/c efficiency when whacking a (included) k-type probe before and after (they're also tiny wires and sensors, so poking under rubber hoses directly into air stream is no problem).

Best information was when I moved the pre-i/c connection to the airfilter though.....8-12 degrees above ambient at cruise Working on a solution now.

That display looks nice Bob - is it backlit too? Shame they don't seem to do a dual input, but once I've sorted the intake path I'm only really interested in TB.

Richard

 

Yes its backlit, I use the external backlight option powered from the car supply using a 5v regulator cct, v simple.

I will go take the pics now, I've been a bit busy since Friday am !!!

bob

 

Hi Bob,

Having read the spec sheet for this meter, why are you not running the meter direct from the 12V supply and running the backlit display of the meter's built in supply(It can be fed of -7.5 to 15V in this mode)? I'm guessing I've missed something?

I'd also appreciate seeing details of your installation pics of the thermocouple and the part no. of the thermocouple you recommend.

Thanks,

Ian

 

Its better not, the built in supply means the callibration needs to be redone, easier to do what I did and then small callibration changes are all thats needed.

Pics here, bear in mind the meter is placed for convenience at this time, I may move to a more esthetic position.

http://bobrawle.customscoobies.com/Charge%20Temp.htm

bob

 

Thanks for the excelent pics Bob. The Meter looks OK, where you've mounted it. At least you've not sellotaped it on top of the speedo binacle Japanese style ;-)

One last question about the thermocouple, how have you installed it in the short hose between the intercooler and the TB without damaging it and also keeping the hose airtight? It looks tricky?

Cheers,

Ian

 

It is but since the thermocouple is made from fine cable I just separated the twisted pair and laid them side by side, , formed the tip to a right angle (about 8mm length) then carefully inserted so that the tip is hanging down into the air stream, as the cables are small and side by side the rubber hose forms around them and seals, it wouldn't work wiht bigger cable but there is no leak, I've done this on several occasions with no problems now.

bob

 

Dean, if I read the maplin site correctly, does it come with the probe ?

I assume you added the external probe simply as a mounting method, to prevent the actual temperature probe from getting direct heat transfer from the I/C pipework - so any metal tube would work ?

I know that it only senses every 15 seconds, which seems a v. long time, but for road use, I think it might do (when 8 quid is compared to 50 )

cheers,

Mark

 

Hi all, been reading this thread and thinking of doing the same, but have come up with another sensor. How about this sensor I am going to run the outside temp therocouple into the bottom of my airbox where Subaru have already drilled a hole.

Simon

(edit)

I am using the top unit shown on that page.

 

would only be good if you could un solder the internal sensor and use it extended under the bonnet

 

The external sensor is on a 3 metre fly lead.