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[Mk2] [Turbo] Better air intake temp sensor and positioning.Results page 6.
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Martin F
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PostPosted: Mon Jun 29, 2015 10:11 pm    Post subject: [Mk2] [Turbo] Better air intake temp sensor and positioning.Results page 6. Reply with quote Reply with quote including images

I have a rev 3 turbo, it has a standard air intake temperature sensor, which is very slow to respond with up to date temps. (apexi pfc readings).
I remember a few years ago you could get the sensor off a rx7 which worked on the mr2 and was more responsive, however i can no longer find this sensor, so can anybody recommend this or another sensor i could buy that would provide me with more responsive temps. and work on a mr2, thanks [thumleft]


Last edited by Martin F on Sun Oct 25, 2015 9:39 am; edited 2 times in total
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craig




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PostPosted: Tue Jun 30, 2015 11:09 am    Post subject: Reply with quote Reply with quote including images

SPA do a pre and post intercooler thermocouple gauge. Refresh rate is 4 times/sec iirc.
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Peter Gidden - SBITS
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PostPosted: Tue Jun 30, 2015 11:20 am    Post subject: Re: [Mk2] [Turbo] Better air intake temp. sensor. Reply with quote Reply with quote including images

Martin wrote:
I have a rev 3 turbo, it has a standard air intake temperature sensor, which is very slow to respond with up to date temps. (apexi pfc readings).
I remember a few years ago you could get the sensor off a rx7 which worked on the mr2 and was more responsive, however i can no longer find this sensor, so can anybody recommend this or another sensor i could buy that would provide me with more responsive temps. and work on a mr2, thanks [thumleft]


I've had 5 or 6 of these over the years. I'll see if i can dig an invoice out of the accounts.
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Martin F
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PostPosted: Tue Jun 30, 2015 5:21 pm    Post subject: Re: [Mk2] [Turbo] Better air intake temp. sensor. Reply with quote Reply with quote including images

Peter Gidden - SBITS wrote:
Martin wrote:
I have a rev 3 turbo, it has a standard air intake temperature sensor, which is very slow to respond with up to date temps. (apexi pfc readings).
I remember a few years ago you could get the sensor off a rx7 which worked on the mr2 and was more responsive, however i can no longer find this sensor, so can anybody recommend this or another sensor i could buy that would provide me with more responsive temps. and work on a mr2, thanks [thumleft]


I've had 5 or 6 of these over the years. I'll see if i can dig an invoice out of the accounts.


Thanks Peter [thumleft]
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Martin F
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PostPosted: Tue Jun 30, 2015 5:22 pm    Post subject: Reply with quote Reply with quote including images

RedMRČ wrote:
SPA do a pre and post intercooler thermocouple gauge. Refresh rate is 4 times/sec iirc.


Not really got any more room for another gauge but a look wouldn't hurt...Do you have a link ?
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jimGTS
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PostPosted: Wed Jul 01, 2015 9:39 am    Post subject: Reply with quote Reply with quote including images

defo get the one i used....

though it will show you running higher temps than your used to because its so quick to update! ha.

its ideal to read off the commander too.

think i was one of the very first to use one on the mr2 at least.
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shinny




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PostPosted: Wed Jul 01, 2015 11:32 am    Post subject: Re: [Mk2] [Turbo] Better air intake temp. sensor. Reply with quote Reply with quote including images

Martin wrote:
I remember a few years ago you could get the sensor off a rx7 which worked on the mr2 and was more responsive, however i can no longer find this sensor, so can anybody recommend this or another sensor i could buy that would provide me with more responsive temps. and work on a mr2, thanks [thumleft]


It wasn't a stock RX7 part, but and aftermarket sensor designed for the RX7 that just happened to work with the ST205 and rev3+ SW20 with a threaded adaptor. It was called the RIAT (Rapid Intake Air Temperature). This is what both Jim and I have. However the last time I looked, I couldn't find any way of ordering one [Eh?]
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jimGTS
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PostPosted: Wed Jul 01, 2015 11:38 am    Post subject: Reply with quote Reply with quote including images

id be interested to see how it responded on an OEM ecu mind you!!!


i had a power FC at the time.

but yeh it was an aftermarket part, not a rx7 item.
here was mine





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Peter Gidden - SBITS
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PostPosted: Wed Jul 01, 2015 11:41 am    Post subject: Reply with quote Reply with quote including images

I have emailed the guy that supplied them to see if he still has them.
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shinny




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PostPosted: Wed Jul 01, 2015 11:47 am    Post subject: Reply with quote Reply with quote including images

jimGTS wrote:
id be interested to see how it responded on an OEM ecu mind you!!!


The resistance specification was the same, so it's not like the ECU was gets the wrong reading... it just gets a more accurate reading [thumleft]

It's a pity you need to cut and solder the wiring harness to fit, so I can't go back to the stock lump of metal for comparison. I can't see it doing harm though.
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Peter Gidden - SBITS
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PostPosted: Wed Jul 01, 2015 11:50 am    Post subject: Reply with quote Reply with quote including images

jimGTS wrote:
id be interested to see how it responded on an OEM ecu mind you!!!


Same as it would on PowerFC.
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jimGTS
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PostPosted: Wed Jul 01, 2015 12:03 pm    Post subject: Reply with quote Reply with quote including images

I am talking about the effects of seeing more accurate readings on the oem ecu.
Ie how differently it would respond to heatsoak etc.

Cruising the oem sensor takes a while to return to ambient temps, on the other sensor it wouldn't, so I'm sure the engine/Ecu would act a little different to these readings.
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shinny




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PostPosted: Wed Jul 01, 2015 12:56 pm    Post subject: Reply with quote Reply with quote including images

jimGTS wrote:
I am talking about the effects of seeing more accurate readings on the oem ecu.
Ie how differently it would respond to heatsoak etc.

Cruising the oem sensor takes a while to return to ambient temps, on the other sensor it wouldn't, so I'm sure the engine/Ecu would act a little different to these readings.


I would suggest all it does it add safety, particularly on spool-up, when the intake temperature increases before the stock sensor reacts. A quicker reacting sensor will all the ECU to fuel appropriately rather than fuelling leaner based on the spuriously low temperature reading.
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jon
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PostPosted: Wed Jul 01, 2015 1:29 pm    Post subject: Reply with quote Reply with quote including images

I have one of the Fenne Development sensors on my MR2 with a ST205 ECU, I've noticed it runs leaner on boost (~11.0 AFR) than normal.

As hot air is less dense and this sensor picks up the change in air temperature quicker, the ECU is injecting less fuel on boost, hence the leaner AFRs.

The Fenne Development sensor is a Sagem sensor from a Triumph motorbike with a threaded adaptor so that it fits directly into the plenum.
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jimGTS
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PostPosted: Wed Jul 01, 2015 8:12 pm    Post subject: Reply with quote Reply with quote including images

Interesting to hear Jon, I did think as much.
Is some of that down to the st205 ecu as well though?

I may look into it a little further now it's jogged my memory this part.
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jon
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PostPosted: Wed Jul 01, 2015 8:24 pm    Post subject: Reply with quote Reply with quote including images

jimGTS wrote:
Interesting to hear Jon, I did think as much.
Is some of that down to the st205 ecu as well though?

The ST205 ECU does run slightly leaner compared to the Rev 3 MR2 ECU but they're both still <10:1 AFR by 6000rpm with the standard air temp sensor.

If it was easy to swap between the 2 sensors I'd gladly do 2 runs to verify that the sensor changes the on boost AFR, but the new sensor has a different connector and I've chopped off the original connector [Sad]
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C35Rob
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PostPosted: Wed Jul 01, 2015 10:08 pm    Post subject: Reply with quote Reply with quote including images

Ive just bought a used triumph sensor, when it arrives I'll knock up an adaptor and get it fitted, it should be easy to make a plug and play wiring adaptor too as the bosch style connector can be bought with wiring tails for next to nothing and finding a male plug to fit the original harness shouldn't be too hard.

Thanks for bringing this to my attention [thumleft]
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jimGTS
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PostPosted: Thu Jul 02, 2015 12:10 am    Post subject: Reply with quote Reply with quote including images

Ha, I'm sure rob has found a winner for a few members.

Keep me informed rob if you can string a kit together.

Given I did this 5years ago, before many knew, I'd be interested in trying it out again.
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C35Rob
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PostPosted: Thu Jul 02, 2015 12:54 am    Post subject: Reply with quote Reply with quote including images

Will do Jim,

I can certainly supply a fitting kit if there's interest, I'd assume most people would want to source their own sensor?
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shinny




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PostPosted: Thu Jul 02, 2015 1:09 am    Post subject: Reply with quote Reply with quote including images

Rob - East Coast Imports wrote:
Will do Jim,

I can certainly supply a fitting kit if there's interest, I'd assume most people would want to source their own sensor?


What's the number for the right part? I presume it's got the same electrical properties?
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