Paul's MX-5 NC with a 231 heart

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Paul_13
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Tue Oct 08, 2019 4:03 pm

Thanks to mctaggart for the maf tube. The old tube had deformed slightly from my hulk strength doing up jubilee clips. Hopefully this may sort the AFR issues
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Re: Paul's MX-5 NC with a 231 heart

Post by warpc0il » Tue Oct 08, 2019 4:17 pm

Paul_13 wrote:
Tue Oct 08, 2019 3:59 pm
warpc0il wrote:
Tue Oct 08, 2019 3:44 pm
Some say the mileage is stored in the PCM and only displayed on the dash.

You can read the mileage with an ODB reader.

However I've not heard of anyone that's had to replace the PCM suddenly have the mileage change.

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Not sure if I follow you on that one? Maybe elaborate more?
If the mileage was stored in the instrument panel, like in the old days of mechanical counters, then changing the panel would change the mileage.
If the mileage is stored in the PCM and the instrument panel is only used as a display, then changing the panel wouldn't change the mileage.
However, if you changed the PCM (replaced your suspect/broken one for one from another car) then you'd then expect the displayed mileage to change, which I don't *think* it does.

The technical manual is very sketchy in this area, as they don't want people to know how it works, as it may encourage "mileage fraud".
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Tue Oct 08, 2019 5:04 pm

warpc0il wrote:
Tue Oct 08, 2019 4:17 pm
Paul_13 wrote:
Tue Oct 08, 2019 3:59 pm
warpc0il wrote:
Tue Oct 08, 2019 3:44 pm
Some say the mileage is stored in the PCM and only displayed on the dash.

You can read the mileage with an ODB reader.

However I've not heard of anyone that's had to replace the PCM suddenly have the mileage change.

Sent from my SM-G800F using Tapatalk
Not sure if I follow you on that one? Maybe elaborate more?
If the mileage was stored in the instrument panel, like in the old days of mechanical counters, then changing the panel would change the mileage.
If the mileage is stored in the PCM and the instrument panel is only used as a display, then changing the panel wouldn't change the mileage.
However, if you changed the PCM (replaced your suspect/broken one for one from another car) then you'd then expect the displayed mileage to change, which I don't *think* it does.

The technical manual is very sketchy in this area, as they don't want people to know how it works, as it may encourage "mileage fraud".
Gotcha. Thanks

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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Tue Oct 08, 2019 5:10 pm

I've just managed to find a 95mm induction pipe setup. Currently I have 90mm setup and there is a bit of a restriction before the maf tube.

Might give this a go

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Re: Paul's MX-5 NC with a 231 heart

Post by zippyonline » Wed Oct 09, 2019 5:41 pm

I know with my bimmer (E91) that the mileage is stored on a couple of computers including the instrument cluster, and they all have to match up and are effectively coded to each other. If you get a brand new instrument cluster it effectively reads this mileage and displays it - all good. If you get a instrument cluster from another car, it reverts to whatever mileage is the higher one (i.e. if the donor cor had a higher mileage, it will now display this, if the donor car had a lower mileage, it uses the mileage from another computer on your own car).
You can "virginise" an old instrument cluster by removing on of the chips on it and setting it all to zero's in hex or something.... and then it's like plugging in a new one.

This may be totally irrelevant, but feels broadly on topic...!
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Sat Oct 12, 2019 5:01 pm

1 gauge fitted. Fiddly as f
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Sun Oct 13, 2019 6:55 pm

All done and wired in.
I've got 1.5bar oil pressure at idle which seems OK. I've dropped the idle back down to standard from 1k.
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Re: Paul's MX-5 NC with a 231 heart

Post by Phil Bate » Sun Oct 13, 2019 10:39 pm

That looks really neat =D>
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Mon Oct 14, 2019 4:37 pm

Making the most of my paternity leave :)

This job was 1000x easier than expected. The rear suspension bushes do not have an outer metal sleeve?! I was surprised to see the bushe just fall out after I drill a few holes in it.

Rest assured I'll be doing the remainder of the rear suspension!
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Re: Paul's MX-5 NC with a 231 heart

Post by PeteH » Mon Oct 14, 2019 9:31 pm

Did it have aftermarket polybushes in it then? The RX8 OEM bushes are certainly sleeved, and I can't believe Mazda would use unsleeved bushes.
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Mon Oct 14, 2019 9:44 pm

They were standard mx5 bushes I removed. The mx5 and rx8 arms are similar if not identical.

There was an inner metal sleeve cast within the bushe, but no sleeve on the outer circumference of the bushe.
I'm used to working with Peugeots/bmw's/audi etc and this took me by surprise

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Re: Paul's MX-5 NC with a 231 heart

Post by Lemon » Mon Oct 14, 2019 10:00 pm

that doesn't sound right.

Not to dispute you at all Paul just i make bushes for a living and i'd have to agree with Pete on this.

Certainly an odd one, unless it was supposed to be bonded to the arm itself and has come unbonded...
Thanks, Stu

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Re: Paul's MX-5 NC with a 231 heart

Post by Neilparry » Mon Oct 14, 2019 10:04 pm

That’s how the RX8’s bushes are
In my experience the rubber bush is moulded to the outer shell. You can either melt them or drill them to remove the rubber bush


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:wash:

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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Mon Oct 14, 2019 10:26 pm

Lemon wrote:
Mon Oct 14, 2019 10:00 pm
that doesn't sound right.

Not to dispute you at all Paul just i make bushes for a living and i'd have to agree with Pete on this.

Certainly an odd one, unless it was supposed to be bonded to the arm itself and has come unbonded...
It was bonded to the outer arm. It wasn't a "replaceable" bushe as such.
I probably didn't explain it very well.

It didn't have an outer shell like the bushe below.
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It was just bonded to the actual suspension arm
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Re: Paul's MX-5 NC with a 231 heart

Post by Lemon » Tue Oct 15, 2019 11:42 am

Paul_13 wrote:
Lemon wrote:
Mon Oct 14, 2019 10:00 pm
that doesn't sound right.

Not to dispute you at all Paul just i make bushes for a living and i'd have to agree with Pete on this.

Certainly an odd one, unless it was supposed to be bonded to the arm itself and has come unbonded...
It was bonded to the outer arm. It wasn't a "replaceable" bushe as such.
I probably didn't explain it very well.

It didn't have an outer shell like the bushe below.
610220705.jpg
It was just bonded to the actual suspension arm
Ahh I understand, yeah it would have been moulded in the arm.

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Thanks, Stu

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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Fri Oct 18, 2019 7:32 am

Monitored the oil temps on the way to work this morning and when driving briskly the temp is at around 100-110'c. Takes forever to warm up, much longer than I thought.

A thermostat would be good but they're bloody expensive to retro fit on my setup.

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Re: Paul's MX-5 NC with a 231 heart

Post by boosted » Fri Oct 18, 2019 7:35 am

You put an oil temp sensor in?..i found the oil temps lag the coolant temps by about 10 mins...ideally you want a thermostat or maybe a electric waterpump as they dont use a thermostat.

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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Fri Oct 18, 2019 7:38 am

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Yes. I found it more like 15mins :shock:

Electric water pump?

On the hunt for a 4.1 diff now. Been playing on my mind

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Re: Paul's MX-5 NC with a 231 heart

Post by boosted » Fri Oct 18, 2019 7:42 am

Ideally dont wanna give it any stick til oil at 80deg C.
I need at least 15 mins in Westy to get oil to 80deg c...i block a 1 oil cooler for road use. Car has 2 mocals but no oil thermostat.

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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Fri Oct 18, 2019 7:43 am

boosted wrote:
Fri Oct 18, 2019 7:42 am
Ideally dont wanna give it any stick til oil at 80deg C.
I need at least 15 mins in Westy to get oil to 80deg c...i block a 1 oil cooler for road use. Car has 2 mocals but no oil thermostat.

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I remember you saying. What does your oil temp go up to?

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Re: Paul's MX-5 NC with a 231 heart

Post by boosted » Fri Oct 18, 2019 7:51 am

On road about 85deg C with 1 oil cooler blocked.
On track 110deg max red hot day usually about 100degs C.
Coolant im at 100 deg C.
Once all warmed up the oil and coolant track each other by a few degrees....
On track onit...oil will creep up 1 deg a lap and leave the coolant behind after 10 laps or so...its all within range my temp alarm for oil is set at 120degrees....never gets there butif i could try the thing on limit for 25 mins maybe but i cant.
Quick cool down lap temps drop massively.

Once a year i remove rad and clean the fins...get full of dead flies and then i notice higher running temps.

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Re: Paul's MX-5 NC with a 231 heart

Post by Phil Bate » Fri Oct 18, 2019 9:02 am

What oil cooler setup and piping are you running Paul?
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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Fri Oct 18, 2019 9:06 am

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Custom job.

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Re: Paul's MX-5 NC with a 231 heart

Post by boosted » Fri Oct 18, 2019 9:50 am

Ideally i would like to fit a mocal oil thermostat as set at 82degc allows quick oil warm up.
But as im using a sandwich plate for pressure and temp take off would have to use a remote 1. Gonna get abit untidy so i block a cooler.
Why cant you run a coolant thermostat?

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Re: Paul's MX-5 NC with a 231 heart

Post by Paul_13 » Fri Oct 18, 2019 9:56 am

boosted wrote:
Fri Oct 18, 2019 9:50 am
Ideally i would like to fit a mocal oil thermostat as set at 82degc allows quick oil warm up.
But as im using a sandwich plate for pressure and temp take off would have to use a remote 1. Gonna get abit untidy so i block a cooler.
Why cant you run a coolant thermostat?

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Not something I've looked at to be honest

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