19 is very good.

 

ah ok, cheers Jeff.
I get 9 psi I think.

 

9 PSI is about 18.5".
19" should be about average at sea level.
21" is very good.

 

well i dont suck--sorry couldnt help myself.
od

 

lol.
If you do suck, then your vacuum will be higher!

 

My 15.5 are at 112 feet above sea level.

 

Yes, but you have an S/C, which loads the engine at idle.
N/A and turbo don't have that.

 

Denny,

I took my car for a test drive today after removing the RB ram air scoop. My air temps where the same as before 4~6 degrees higher than the ambient temperature (ambient temp was 92 degrees). Look at the picture and notice where I set the temperature probe. Keep in mind that I made a heat shield box around the air filter/intake tube and a RB front bumper (bigger grille).

Also, here are the engine bay temps I got while at idle: 142 degrees AC OFF
147 degrees AC ON

Once the car start it rolling the temps dropped to 4~6 degrees above ambient temp right at the 25 mph point. They stayed the same from 25 mph to 85 mph.

 

Denny,

Be careful making or adding an enclosed CAI to your setup. I did a while back experimenting with a four inch PVC pipe from the intake to the RB scoop (I had to heat bend the pipe in order to molded in the shape of an oval in order to fit the scoop). Anyway, my A/F ratio jumped to 15~16 at full throttle. Thank goodness for my car meth addiction or goodbye apex.

 

My engine temps are down…way down since I remove the RB ram air scoop. I also changed my OEM water pump for a high flow Mazmart water pump and did the OD 160 degrees thermostat mod.

Oops! I almost forgot. I also added a 24-inch coolant radiator (rail style) to the bottom front in series with one of the leftover Pettit heat exchanger I had (located behind the aluminum intercooler heat exchanger and 10 inch electric fan). See pixs below.

At 92 degrees ambient temp and 80 mph the engine temp was 194 degrees with the AC at full blast. Once I lower the engine load and at short idle my engine temp hovered around the 180 degrees mark. Notice the drop in engine temperature soon after I let off the throttle.

 

Just rember to keep your temps below 210, a cool engine is a happy engine, they tend to live longer that way. Under 200 is even better.

 

Bone-stock RX-8s here in Phoenix will idle over 200 from a cold start!
I've gotten in my car in the morning after having it sit in the garage overnight and have the coolant temps hit 175° before I can get the garage door all the way up.

 

come one Jeff - everyone knows everything you touch heats up pretty quick

 

lol.
I am a fire starter.

 

love that song!!!

 

Not even gona touch that.

 

have to say I do not like seeing all these guy on guy avatars

 

Nothing to touch - its the desert.
This is why every RX-8 owner in Arizona will have their engine replaced at least once.

In another few weeks, it wont matter anymore.

 

Except me...

I hope...

 

Do you mean water coolant temp at Fahrenheit?

Cos my regular runs (with no frenetic driving) have the coolant temp at 195-210. And thats in the clearly not hot UK....

 

how can 210 be bad - the factory fans aren't even switched to full before then ?


also : what oil temps are you guys seeing when your water is up around 210 and what is considered too hot for oil ?

 

The factory fan settings are not designed for anything close to a hot climate. By the time the secondary fans come on full blast you've passed 215 degrees coolant temp and well on your way to a heat soaked cooling system.

Mazda considers 210 degrees to be normal but honestly 210 is 10 to 15 degrees too hot to be normal. Now what's "normal" for you car will depend on mods and clearly an FI application will run warmer.

As for oil...beyond 220 degrees you start to degrade your oil faster than normal if you run for extended periods of time.

At 230 degrees you better start taking notice of what your doing and decide whether to keep pushing your motor.

230 - 255 is a danger zone...at 260ish degrees you're taking the bus.

 

The short bus.

 

As long as I am moving my oil temp stays @180-190, depending on the weather and my right foot. Idling is a different story. The temps slowly rise while sitting still. It took @7min, but one time the temp went up @230. I don't believe that is bad since oil doesn't start to break down untill much higher temps, but I still didn't like it since it was higher than what I'm used to seeing.

BTW, I'm using 10w40 synthetic. I also have higher OMP rates and the synthetic burns just as well as the regular stuff.

 

Well your not alone in Phoenix. We have the same problem. The two big desert populations are Phoenix (Metro) and Vegas. There are very few in ether place that are still on the original engine.

Until next year - this is going to be annual problem. I would hate to park this car for the summer but that may be the only way I can keep it under 230 degrees.