"Bass, Jerry" wrote:

I have had a coolant problem since I got this engine back from Turintine.

It

would bubble out of the block as I came back from flying.

I added stop leak and have been flying since.

It did boil over on one 90 degree day, but I took the bonnet off and it
cooled right down.

I will send the block back to Bruce soon.

Jerry, What do your rad ducts look like? Got any pictures of the rad ducts?
Are you using cowl flaps? What does the outlet area look like?
Is there a radius on the firewall near the outlet area?

Paul Lamar

"Bass, Jerry" wrote:

The inlet ducts expand as they go towards the face of the Radiator.  Not as
smooth as your 109 drawing, however.  I did increase the size of the lower
hole from what you see to 3" dia round. I feel if the Lyc, can get enough
air from those upper holes for 180 hp, then I should be able to get enough
air to my rotary.  No I do not have a Burn, in front of the air outlet.

The air outlet is very important, as I had very high engine compartment
temps until I closed the crack below the outlet. Once the crack was closed,
the Temps came back down.

By the way, the Rads are in Parallel.  One Rad feeds from the top, and I
will change it to the bottom.

Jerry Bass

So I take it the cooling is fine now? 

BTW I think the intake area needs to be larger
with those thick evap cores than what the 180 HP Lyc needs. With thinner cores
just as Jim Mosure is using on his RV6 shown in this pricture then the Lyc size
holes would be OK.

Paul Lamar
 
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