RX8R3Rod

In his last post ASH8 worries that his S2 might not be using enough oil, if I understood that correctly?

I think I'd agree. I am now on my second R3, the first I got in 2008 was amongst the first batch of R3's in the UK and used a significant amount less oil than my previous S1.

I have been lucky enough to buy one of the last R3's in the UK in November 2010 and it uses significantly more oil (I'd say about 50%+) more oil than my previous R3, and (from memory) more than my previous S1.

Now I know there is natural product variation, but this sort of difference seems to me too large to explain through normal variation.

So maybe Mazda agrees too?

By the way, I'm still 'pre-mixing with Pro-tek R, even so.

Rod.

jasonrxeight

idk how much is normal. I usually add half a quart every 600 miles. mine is manufactured in 08.

RX8pwnage

iTrader: (1)

I use 1 quart per 1000 miles, I drive hard.

xexok

On thing that bothers me about doing this is when you turn the car off and then turn the key to ACC to inject more oil, you stop the car from running the fans to cool itself off like it normally would. I have noticed driving around in 100 degree weather every time I turn the car off and do nothing the fans kick in, but if I had turned to ACC then the fans do not run.

Now on really hot days I do not do this to inject more oil anymore, its got to be better to have the fans run because they are kicking on for a reason.

ASH8

Granted..

However, first time the EMOP (system) will inject Oil at normal turn off, and then again only if you put key to on (dash lights on) and off again after the first normal turn off squirt.

Now having said that, yes, if extremely hot the Cooling Fans will come on, it is cooling down the coolant in the Radiator, no where else as coolant does not circulates when engine is off.

Also, only Series 2's have a thermistor incorporated in the PCM (ECU) body, this is for engine compartment temperature, so again when that reaches (IF) a certain level (230f or 110c or more), then the fans will also start up (middle speed) to move air around the PCM and engine compartment.

So with ignition on and off again, even though the fans will turn off, IF the compartment is hot enough so too the PCM thermistor should turn fans on again.

I have not notice this an issue with my 8.

xexok

I wouldn't really call it an issue but I got into the habit of turning the car off and then turning it to ACC on really hot days, then I noticed the fan only came on if I didn't do that. Maybe it just has not gotten hot enough in there to turn the fans on after doing the second injection I don't know but 110 degree days should have done that.

Delmeister

I don't see how this can work. In the S1 the MOP actually pumps oil, but according to you the EMOPs in the S2 are just valves that open and allow oil under engine oil pressure to enter the injectors. Since oil is incompressible, the oil pressure goes dead almost immediately on turning off the engine. You can turn the key and hear all the EMOP clicks that you want, but there ain't significant oil going anywhere.

I have a few problems with your description of how these EMOPs work, chief of which is the range of allowable pressures. You quote 7-20 psi, which translates into a wide range of acceptable injection volumes. Then there is also the extreme accuracy required in timing the period that the solenoid is activated.

In looking at your pictures, I tend to think that the EMOPs are actual pumps. The solenoid pushes down the plungers (pistons) which deliver controlled quantities of oil each time it is activated. The condition placed on the engine oil pressure is just to ensure that there is oil available for the pumps to grab. Solenoid activation time also becomes an insignificant issue.

So if my interpretation is correct, then you may indeed be able to pump oil into the engine without turning it on provided there is some residual oil pooled in the vicinity of the pump intakes.

ASH8

You are 99% correct, however, they EMOP uses both PSI Pressure from Engine Oil Pump which is maintained at 7-20 PSI (obviously at the higher level) inside the two separate EMOP chambers where the 4 and 2 plungers pump oil, ie plunger goes up and down with oil maintained inside chambers by Oil Pressure (engine OP), so they are both correct, one complements the other.

I do not quite agree with your theory of oil pressure, once and engine is turned off there is pressure in oil lines for many seconds...it does not die immediately when engine is off...OCV sees to that.

EMOP's sit on top externally on engine barrel..

Delmeister

To say they are both correct misses the basic point I was trying to make in that the EMOPs pump rather than throttle. The complementary element is only in the sense the the EMOPs require the engine to deliver oil to it's intakes.

The engine oil pump essentially pumps oil into a very leaky (bearing clearances, MOP, etc.) small metallic container (engine cavities). The delivery rate is quite high in order to maintain pressure. Once the pump is turned off, this leak rate is initially about equal to the original delivery rate. There is very little energy storage, as would be the case of pressurized air in a leaky rubber hose. I can't see seconds of significant pressure.

paimon.soror

iTrader: (15)

I have had to switch to 'ON' a few times when I was playing with the canbus stuff. All I can say is when I do this numerous times, then next day when i turn on the car it smells really rich ... not sure if they are related or if its just summer fuel or something.

ASH8

What!...what rubbish, you are talking OIL here not Air to start off with.

As I said the OCV Maintains the Oil Pressure in the sealed lines so that when engine is turned Off it automatically does one pump Cycle, every time.

I guess you are going to tell me this is incorrect and can not happen.??

I am not going to debate the subject any further, I suggest you get a copy of Series 2 Highlights and read it, and I also suggest you get hold of an EMOP and open it up (as have I)....you may learn something..

http://foxed.ca/foxed/index.php?page=rx7manual