-------------- Original message from "Steve Brooks" : --------------
> John,
>
> > Before that, the temps would climb up, what I think is too high,
> especially the oil.
> That's part of the point. Maybe you're expecting temps to be lower than they
> need to be. Also - how accurately is you're gauge calibrated? (I calibrated
> mine with hot wax, but I'm still not sure I really trust it within 10
> degrees or so.) I'm looking forward to getting my EM2, then I'll know better
> whats going on. So far though, I think I'm within acceptible limits - I'm
> not loosing any coolant and the engine keeps on running :)
>
> First let me say that my oil temperature is a digital display from Aerospace
> Logic. Its' accuracy is +/- 1/2 degree, but would depend on the sensor.
> Sensor is Westach made for aviation. Coolant is a VDO gauge and sensor. I
> didn't verify accuracy of either one.
>
> I went to the airport this morning to fit the new scoop, and since the
> visibility was pretty good, I decided to take the plane up since I hadn't
> flown it since I put all off the mods back that gave me fairly decent
> results. The OAT was 80F, and I took off from GRD elevation 600 MSL -
> density alt was already 2200' I climbed to 2200 MSL with 5lbs of boost
> (5300 RPM), leveled off, and pulled the throttle back to zero boost (4600
> RPM). Oil 190 and rising, coolant 200 and rising. Oil stabilized at 217F
> and coolant went up to 225 after about 2 minutes or so. That's the highest
> coolant temperature that I've seen in a long while. Throttled back to -10
> boost (4200 RPM), and temperatures stabilized at 215 Oil and 200 coolant.
>
> I throttle up a little bit to about -5 boost, and oil temp up to 217 coolant
> about the same. Cruised at that throttle setting for about 5 minutes.
> Everything pretty steady. Speed only about 120 kts. Didn't retract the
> nose gear.
>
> When I throttled down to descend and land, the oil was 180 and coolant also
> about 180. My temperature gauges seem to be tied to the throttle, which
> tells me that I've not got sufficient cooling.
>
> Last time I flew I was getting a stabalized 205/210 in the climb
> (coolant/oil). When I leveled off at 5000 it settled down to 185. At 11000
> it was lower until I opened the throttle, then it stabalized at 185.
>
> I'd be happy with those temps. I don't know what is different between the
> tow set ups. My coolant sensor is in the water pump housing, and it has a
> pretty long probe on it, so I have no doubt that it's in the coolant stream.
> This point is just before the coolant goes to the radiator, so it is at the
> hottest point. My oil sensor is in the top of the remote oil filter, mounted
> to the PSRU mounting plate. I drilled and tapped a hole directly above the
> tube that the filter screws onto. This probe isn't very long, but I tapped
> it in as far as possible, and I ASSUME that it's in the oil flow. The oil
> filter is after the oil cooler, and just before the oil re-enters the
> engine, so it should be at the coolest point.
>
> Your oil coolers are set up differently. I'm using one of the 2nd gen,
> where you are using 2 smaller ones. Your coolers sit in the side of the
> plenum, where mine sits end-to-end with the radiator. The oil cooler is
> closest to the scoop, so should be getting more air.
>
>
> > I am curious about what your temperatures are running. What do you see in
> > climb ? and what do you see in cruise ?
> Climb - 205/200, 1400 EGT, 100kts, 1000fpm on a 90F day.
> Cruise - 185/190, 1300 EGT, 178kts, 5150 rpm, 38 MAP 11,000 ft.
>
> Again, these temps looks very good to me.
>
> I'd be interested in other perspectives on this one.
> Me too.
>
>
> Steve Brooks