I was going to plumb in a another oil cooler near the back of the car. since I have all this space where the other exhaust tip would be.
Any guesses on what kind of oil pressure loss I may see?

significate it maybe--be careful with that
od

And here I thought I was the King of Overheating.

Anyway,, my latest engine has about 30,000 miles on it. It (the car) has been overheating since the three prior engines. The new engine is from Japan, not a REMAN. It (latest engine) has been overheating in the summers down here since the temps hit 105 degrees and up for the last year and a half.
Recently (a couple of weeks ago) MM and I did a compression test on the car. After we visited Phil and did his. I was concerned that the same thing might be happening to mine.
Well,,,, we did the compression test, did the rpm calculations and the end result was,

120psi across the board. Go figure. This is an engine that has seen temps (recorded) as high as 243 degrees. And more than likely higher.

So it baffles me to see an engine like Phil's fail at 15,000 miles.
I really find it hard to understand that overheating his car has caused low compression.
I don't have the cooling upgrades that Phil has, BHR Rad, Mazmart waterpump. I have kept mine stock in the cooling dept for warranty reasons.

I feel that it is caused by other factors. I'm unable to determine what at this point. After we get it apart maybe it will become more evident.

So all you rocket scientists ponder that.

simple
overheating + FI = apex pwnage

Phil , what ratio were you premixing at and has your oil consumption been stable lately ? Thanks

Overheating is not going to effect the Apex seal. It's holding combustion gases already and is going to be hotter than the coolant already.
There is nothing the Apex seal is going to transfer the heat to. Apex will run just a bit under combustion temps.
Only thing that is going to cause Apex premature wear is a lack of lubrication.
Side seals also should be considered, but the only way for them to fail is to break. That didn't happen. End play against the corner seal? Have to be ALL twelve of them to have such even compression numbers.
So you are left with rotor housing grooving due to foreign material entrance through intake, or all six Apex seals worn down unevenly due to lack of OMP flow/spray.
Or it's a boost issue. Which I doubt.

I'm going with the Apex oiling scenario.

yeah - i'm thinking a lubrication issue more logical as well - hence the question .....

I started premixing at 1000 miles and used Pettit premix and their recommended 4oz to a tank, later I started using Idemitsu in the same amount per tank (4oz). I have been consistent with it's use and at that ratio thru today. My oil consumption thru the metering system has been inconsistent until I had the Cobb AP installed. That is one reason I went premix. When the car at 1000 miles did not conform to recommended oil use I started to premix immediately. The dealer at that time was going to talk to Mazda to find what caused the inconsistency but they closed up and left me with another dealer that was more antagonistic than helpful.

Phil, I know the compression test is the holy grale kind of thing , but what were your vacumn numbers and is the car idling ok?
This is strange. I have never heard of a 15k engine with low compression. Blown---yes. But not nearly equal-- low compression in all faces in both rotors. Even high milage ones usually have a face or 2 left that have fairly good compression.
It would be interesting to see if a pre mix of 2 oz per gal on a test run would make any difference.
OD

I can't tell you my vacuum numbers cuz I only logged the vacuum from the intake at supercharger cuz we were having that problem with the bypass valve and were trying to blame the terrible idle on it. Jeff or Ray may remember them but at the time we were sure the problem was the valve. The car presently idles very low and Jeff has trouble getting more idle RPM from it. It really picks up when boost enters the picture

The low mileage is the main reason we tried to blame my ongoing problems on other things. We did find problems elsewhere but they never fixed the main problem of the idle.

Can't hurt to try a one time trial of 2oz per gallon. Not real sure what that would prove but hell I'll try anything. I was the one in the group that thought the compression check was a waste of time, shows what I know.

Premix at 4 oz per tank is not enough to do anything helpful (especially given that you are FI'd) in my opinion .
If your MOP was playing up then there is a posibility that premix was the only lubrication you were getting at times so lack of lubrication does sound like the likely cause .
have a look at the oil delivery lines - are there any bubbles in the lines ?

His OMP is working (and jacked up via the AP).

I know it's pretty difficult to actually guage this but he did say it was inconsistent .......

the high amount of premix will not hurt anything for just a short run and if it helps seal --well the idle should be affected and you should be able to tell a difference in the engine. it will not cure anything.
od

It was inconsistent before the AP.
I would have a problem with the smog cops if I tried burning more than 4oz per tank. It smokes too much. Already tried increasing it and got stopped. Luckily he did not check for a cat but I had trouble explaining premix to him. The smog cops have no sense of humor.

perhaps the damage was already done :dunno:

I've put in as much as 20oz per tank (at the track) and didn't notice the smoke - not that I would I guess ....

Yeah, that is strange.
I've never gotten smoke from premix, either.

bingo.
make sure your dip stick is sealing:)
od

Your making it sound really bad - Are you sure you want to drive it back to Phoenix? :dubs: :rl:

What about oil cooler fans like the ones the guys use in Japan?

So with all that pre mix in there, what do your map readings read like? VS no pre mix?

do you mean my A/F ratios ?
I'm not sure what difference premix makes but I don't think it is significant .

This is a sad day for all 4-port AT's. I used to brag to everyone that I knew someone with a badass FI'd Tiptronic RX8 that killed Porches on the track. I hope it comes back better than ever.

:( me sad too...

any news Phil? I just added a second radiator -i will send you what i did if that could be of use to ya. you are in a different worls.
od

thats strange. like any others. I premix as much as 12oz for a long while and I never notice any increased in smoke. hmm

I use Idemitsu.

I never hurts to have more information and tested alternatives. Send it on and lets see what you have done.

I too use Idenitsu but any mixture more than 6oz causes me to smoke excessivley. I tried the 2oz per gallon mix that olddragger mentioned and had lots of problems: excessive smoke and fouled plugs. I will not try that again.

thanks for trying phil-- to me it doesnt sound good my friend,--at that ratio it may smoke a little but it should run ok and start ok and idle ok. actually should be smoother
are your coils ok?.
Ok this is what i have done. Summit racing has a trans cooler that is 21x7 x 1 1/2 inch deep. you can do a 2 inch recessed mounted from the bumper support -- i made some wrapped around hangers from 1 inch wide aluminum strips from Lowes. Drilled a hole for each mount through the bumper support. i supplied the cooler from the return heater hose. take that little oem restrictor out of the heater hose when you do this..
i opened up 2 more rows off the oem front grill also and i added a small fan (puller) to use during those fast food lines and bumper to bumper.
this puts about 2 more quarts of fluid into the system. limited testing has me on a 95F ambient 50 % humidity, with a/c on,no fans, during 30-45 mph driving, fast food stop and stop light to stop light--at 185F. oil is about the same. my temp did not rise during the fast food stop(it was not fast:). i did turn the small fan on for that. having had enough time with it yet but t this point i would have to say it is working for me.
olddragger

Coils are new but will only be in there for another week or so. BHR coils should be ready for the rebuild.
I will pass this on to Ray. He's taking my 8 to Phoenix for the rebuild. He tells me that in 7-10 days he will have it complete and staying cooler.

Good luck friend--please keep us informed
D

We had a little meet in Vegas over the weekend and when Ray left he took my car for the rebuild. I have not yet heard if they made it in one piece or not (is no news good news?). I asked Ray and Jeff to post their findings on this thread - so lets see what happens.

Its sitting outside my house at the moment.

So when is the rebuild happening? Be sure to let me know, Jeeph!

Dunno. Its up to Ray.

Should be the beginning of next week from what I hear from Ray.
But hey what do I know. Just what I read in the papers.

Another episode of Live Reality TV from the garage of MazdaManiac?

I'm thinking it will be from the garage of Charles R. Hill. But hey it could be at MM's.
I don't think we've decided on where yet.

There will be live video for sure.

Well it made it in one piece. My understanding is that Ray's possessions will be in Arizona on Wednesday or Thursday. He has found his abode and giving him time to put boxes in all the rooms - he should start my car on Monday or so.

Translation : sank a few cold ones .....

lol
Indeed.

ill help here on my end by drinking until the statue of liberty takes her clothes off

When you guys do decide to tear into it, make it a weekend Por favor.

Will, almost definitely, be during the week.
There simply isn't any time on the weekends.

adding additional radiator? Dont forget to take the restrictor out of that heater hose, get a 180F aftermarket therm high flow like miloderm--drill 3 holes in it THEN block off the bypass. you will be happier. may need extra oil cooler also or upgrade. you can move the fogs and move the oil coolers over. just talking here guys.
coat the exhaust ports?
phenolic intake spacer for lower intake while you are at it?
water meth system double port!!!
fin your oil pan with cool fins--dont laugh--well--allright laugh-- then look it up.
doing the oil pill mod?
hell just drop a six port engine in!!!
olddragger

Was that you peeking over the wall? :uhh:

You don't want to do this.

Unless you intend to use the HVAC system as an additional cooling circuit, taking the restrictor pill out will just result in less cooling efficiency because you are reducing the flow through the rad.

you know, take a measure from the honda guys? 2 radiators? stacked? would be a good option

oh man, NOW Phil's car is doomed. Taj is making recommendations....

;)

Already did that.

^ pics? pls?

when can you come to CA? I'm ordering the AFR gauge from Ray tmr yo pls come tune my car:? kkthxbye