POLO 4 cylinder 911 engine and 1967 912 almost done

[Chris Pomares]

The MFI pump on the green car is being shipped to Fairchild. The engine is running too lean. We had to guess on the space cam. The 3.2 MFI engine with 46mm throttle bodies instead of 2.7RS's 38's and 41 mm ID SSI's instead of 38's can process a lot of air. The engine was producing 240hp at 15 to 1 at full throttle. It should produce some sporty numbers at 12.5 to 13 to 1 at full throttle. Anything over 250 and I'll be happy. But what I like more is the torque. Oh my.

[Chris Pomares]

I'm making up another set of oil coolers. I went too far on the first set. The car holds 13 to 14 quarts of oil. I couldn't get more than 190 degree temps no matter what I did. Drove to the Palm Springs Parade through Las Vegas in 115 degree temps, still 190. And on a 50 degree day, no more than maybe 160 to 170 degrees. These would probably do well on a big six. I prefer these coolers to the Carrera ones on Vintage Longhoods mostly for astatic reasons. They just look more period correct on the older cars. I've come to the conclusion, that these trombones work very well if you can keep the oil out of the engine and tank long enough. So I'll take them off and either sell them with a spare set of new Elephant crossover lines or hang them in the shop as wall art.
So I'm going from 3 loops on each side to about 1 1/2.

Anyone know if you can dip brass in a zinc tank? The threaded ends are steel, so I gun blue them. If brass can go in a zinc tank I would yellow zinc.

[steve shea]

My climate here in JHWY is about the same as yours in Denver/front range. My 73S with the stock trombone works very well. The engine runs cool even on our hottest summer days. Here about high 80's low 90s. Driving up our passes it may spike a bit but comes right down on the descent. Hope you are good. Haven't been to D in a while. I hear Dave's busy. Skiing is great up here; going on 400" SS

[Chris Pomares]

Steve,
My wife was in Aspen and Beaver Creek all weekend.(4 days)
She said it was very good. Maybe not 400 inches good. Do you have any idea if Dexter W. is still alive and well?
Dave is VERY busy. I’m about to send another car in there this week. 69 Ultra Blau. Say safe and healthy.

Before these coolers I ran a single Carrera cooler and it couldn't keep my oil under 230 plus degrees on a 95 degree day with single digit humidity in Denver's foothills. So all I could do was back off and putter around to keep the temp under 220 degrees. Both of our engines displace 2.4 liters. A stock 2.4 S has a 8.5 compression ratio. My 993 P's and C's are 11.2 or 3. So this engine produces heat.
We'll see what I get with the next set.

[Chris Pomares]

The new oil coolers will go on probably over the next weekend.
I never realized you can zinc brass. I modified trombone oil coolers and had steel threaded ends welded on. The guy who welded on the ends put the lines under 150 PSI. No leaks. I called the company that does my zinc plating and they said it could be done. So here's one of them.
I also drained my oil (3 plus gallons) before removing the valve covers, pan plug, oil tank plug and oil filter.
My oil filter comes apart so I can do an inspection. A little super fine black material on the magnets but not even one speck of metal. Not even the size of the point of a sewing needle. Nothing. While the valve covers are off I removed and will replace the 8 spark plugs. Tomorrow I'll buy the plugs and a case of Champion 10-40 Synthetic blend. Oh and the cam lobes where perfect.

[Chris Pomares]

Everything trial fitted. Good for final install.