What have you done to your RX-8 today????

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feedthegoatxi
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Re: What have you done to your RX-8 today????

Post by feedthegoatxi »

fitted 25mm spacers to the rears, love em
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Re: What have you done to your RX-8 today????

Post by Eddie_r32 »

Whilst Lilly James was out the back of my house in a 1930s Bentley I finally fitted the extended adjusters for the rear coilovers!
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Re: What have you done to your RX-8 today????

Post by SeeJay »

feedthegoatxi wrote:
Sat Jun 15, 2019 7:50 pm
fitted 25mm spacers to the rears, love em
None on the front :?:
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Re: What have you done to your RX-8 today????

Post by Ollie »

Car randomly decides to take longer or shorter to start some times when hot/cold. But its never consistent. Checked the voltage across the battery when starting up it dropped to 10V but when its running its at 13.75V which my mechanic says is a bit low and that its possibly the alternator not putting out enough charge. Anyone got some input on that situation?
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Re: What have you done to your RX-8 today????

Post by mi60o0 »

Eddie_r32 wrote:
Sat Jun 15, 2019 8:28 pm
Whilst Lilly James was out the back of my house in a 1930s Bentley I finally fitted the extended adjusters for the rear coilovers!
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Re: What have you done to your RX-8 today????

Post by johnbb99 »

Yorindesarin wrote:
Sun Jun 16, 2019 1:38 pm
. Anyone got some input on that situation?
Top of Google hits suggest that your charging voltage is possibly a touch low but the voltage when starting is normal at 10 volts and I would have thought that was the critical figure in this context.
I would look to blame something else.
You checked your battery post connections are solid?
As it is intermittent or erratic I would very much be concentrating on connections for example ignition leads and their connection to the plugs.
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Re: What have you done to your RX-8 today????

Post by Ollie »

Yeah the battery connections are fine as far as Im aware. My mechanic said that the charging voltage is a tad low and on shorter journeys that wouldnt exactly be ideal as the battery wouldn't be getting a big enough charge.

Could be possible that on some shorter journeys the batterys not charging enough and the starting voltage drops due to that? Pain to test since I dont tend to have anyone else in the car with me most of the time.
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Re: What have you done to your RX-8 today????

Post by johnbb99 »

You should be able to read a multimeter reading while cranking and/or starting the engine and you could do a test from cold and then after a journey and see if the voltage while cranking is different.
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Re: What have you done to your RX-8 today????

Post by warpc0il »

Very short journeys can take more out of the battery than they put in but the RX8 charging system is capable of keeping on top of this, if everything is as it should be.

However, it only takes a slightly loose connection or bit of corrosion, e.g. on the main body earth, and that goes out the window.

The charging voltage is much more complex than a conventional car, with the PCM managing the alternator load to maintain a smooth idle, plus other factors such as temperature are used in the algorithm - basically, 13.75V might be exactly correct for when it was being tested.

If the power steering is consistent, which also takes a lot of electrical energy, then you need to start your investigation at the starter itself, especially the fat wire that comes down from the battery. Note that this is "live" so don't be putting a spanner/socket on it and shorting to the body.
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Re: What have you done to your RX-8 today????

Post by Ollie »

Ill have a look at the main body earth. And give the starter wire a check over too.

Ill attempt to crank and check the voltage too. Not sure how long the wires for my multimeter are off the top of my head.
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Re: What have you done to your RX-8 today????

Post by Rotary Potato »

Yorindesarin wrote:
Sun Jun 16, 2019 2:37 pm
Ill have a look at the main body earth. And give the starter wire a check over too.

Ill attempt to crank and check the voltage too. Not sure how long the wires for my multimeter are off the top of my head.
Do you own a friend/significant other who might be trusted to turn key (ideally with fuel pump fuse pulled) while you measure with the multimeter?
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Re: What have you done to your RX-8 today????

Post by Ollie »

Nope. Unfortunately not ahah. Not anyone who would be available after a short journey. On a cold start maybe at some point. Ill figure something out Im sure.
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Re: What have you done to your RX-8 today????

Post by Bigblueknight3k »

At last its fitted Image

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Re: What have you done to your RX-8 today????

Post by johnbb99 »

I see from viewtopic.php?f=58&t=37934&p=714899&hil ... st#p714899
that:-
"The workshop manual for the RX-8 states the “standard” compression as 120 PSI (8.5) at 250 RPM, and the minimum as 98.6 (6.9) PSI at 250 RPM. Standard difference in chambers should be within 21.8 PSI (1.5), and difference between rotors within 14.5 PSI (1 (kgf/cm2). Readings outside of those levels, i.e., lower compression readings or greater difference in readings between rotor faces or between rotors, indicate a 'less-than-healthy engine' that probably requires rebuilding."
What figures could be expected from a typical engine that has done 55,000 miles?
(Mine are Front: 7.5, 7.4, 7.5
Rear: 7.0, 6.8, 7.0)
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Re: What have you done to your RX-8 today????

Post by 13Black »

See dis:
viewtopic.php?f=24&t=77931#p1171375

From my data, around the 6.3 kg/cm2 mark, normalised to 250rpm.

But of course, lengths of string vary wildly by how roughly they're handled.
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Re: What have you done to your RX-8 today????

Post by johnbb99 »

So it looks like I've been [very?] lucky with mine (assuming Big Pete uses the standard testing procedure), as his figures are at [or normalised to] 250 rpm.
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Re: What have you done to your RX-8 today????

Post by feedthegoatxi »

SeeJay wrote:
Sat Jun 15, 2019 8:46 pm
feedthegoatxi wrote:
Sat Jun 15, 2019 7:50 pm
fitted 25mm spacers to the rears, love em
None on the front :?:
15mm on the front... really happy, both ends looks flush to me
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Re: What have you done to your RX-8 today????

Post by NeMFO »

Today I began the repairs of my poorly '06, 231. Leaking oil cooler pipe removed and broken front bumper re attached. Discovered that I need two new front tyres due to kerb damage 🙁😐
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Re: What have you done to your RX-8 today????

Post by northerner69 »

Sunday.

Gave it a good wash and got the Auto-Glym out. Nice and shiny now!!
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Re: What have you done to your RX-8 today????

Post by Ollie »

Had to cancel my tyre order due to the fact they hadnt even fully processed the order after a week and a few days... Will have to find somewhere better to order them from this time round! My fronts are definitely point level bald right now. #-o
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Re: What have you done to your RX-8 today????

Post by Honkytonk »

Bigblueknight3k wrote:
Sun Jun 16, 2019 4:16 pm
At last its fitted

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Re: What have you done to your RX-8 today????

Post by Bigblueknight3k »

Yep mine had it in acts as a second top stuet brace as well as bottom probably a bit of over doing it lol

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Re: What have you done to your RX-8 today????

Post by Honkytonk »

Bigblueknight3k wrote:
Mon Jun 17, 2019 10:33 pm
Yep mine had it in acts as a second top stuet brace as well as bottom probably a bit of over doing it lol

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I remember reading somewhere on here Mazda 3 space savers fit? What p/n / model description is yours?
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Re: What have you done to your RX-8 today????

Post by Bigblueknight3k »

Evolve 06 spec

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Re: What have you done to your RX-8 today????

Post by Juey »

johnbb99 wrote:
Sun Jun 16, 2019 6:35 pm
So it looks like I've been [very?] lucky with mine (assuming Big Pete uses the standard testing procedure), as his figures are at [or normalised to] 250 rpm.
yes and yes.
Although he is below sea level. Discuss :-k :study:
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