IO360 High Oil Temps

[OGee]

Tremendous amount of info most of which over my head. So, after all, my question is with the angled valve 200hp IO-360 A1B6 engine with p-mags, RV-8, standard Van's cowl, Texas home, which is the recommended oil cooler and mounting location? Have been investigating the SW 8432R and the 200006A.

[DanH]

Originally Posted by OGee

Tremendous amount of info most of which over my head. So, after all, my question is with the angled valve 200hp IO-360 A1B6 engine with p-mags, RV-8, standard Van's cowl, Texas home, which is the recommended oil cooler and mounting location? Have been investigating the SW 8432R and the 200006A.

Angle valve motor, w/squirters, typical lower CHT and higher oil temp as compared to an parallel valve. SW/Meggitt 10610, 10611, or equivalent if you want to stay under 200 in all but radical circumstances. If you find higher temps acceptable, go with something smaller.

I don't care for the 8432, but that's just me:

http://www.vansairforce.com/communit...5&postcount=26

[OGee]

Thanks, Dan.
Are there pictures some place in the forum showing your 10611 installation?

[DanH]

Originally Posted by OGee

Thanks, Dan.
Are there pictures some place in the forum showing your 10611 installation?

Yeah, but mine is kinda specialized to match a particular optimized cowl setup.

Assuming a stock Vans cowl, go with the basics...a bellmouthed entry off the rear plenum wall, 4" SCEET tube minimum, diffused entry to the cooler (no abrupt expansion from tube area to face area).

[OGee]

Anything special on the exit side?

[DanH]

Originally Posted by OGee

Anything special on the exit side?

There are two reasons to duct the oil cooler exit. One is to accelerate the flow with a converging duct, trading pressure for velocity. This doesn't apply to your application unless you manage to build a duct of the correct shape, and direct the exit rearward. As a practical matter, it easier to simply dump the cooler outflow into the lower cowl volume, and then worry about creating a high velocity exit for the entire cooling flow. Both are beyond the basics.

The other reason is to place the end of the exit duct in a region of pressure less than the lower cowl pressure, thus increasing pressure delta across the cooler, thus increasing flow through the cooler without increasing flow through the cylinder baffles. Given a standard cowl, that means the end of the oil cooler duct would need to be outside the lower cowl.

[OGee]

Dan, I sincerely appreciate the input. Thanks. Will be purchasing the 10611.
Cheers.