500 Mondial Series 2 - Page 8 - Ferrari Life
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post #141 of 796 Old 09-30-2011, 06:47 PM
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Admiral- Look forward to it. What I know about Lampredi engines can be inscribed in inch tall letters on my thumbnail.

Taz
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post #142 of 796 Old 10-03-2011, 10:10 AM Thread Starter
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Classics at Brantwyn

Hi little blue car followers,

Just a quick update to document some more history. We just returned from the old DuPont Estate outside Wilmington, DE where "The Classics of Brantwyn" took place which is a benefit for the Kennett Symphony. Under the able stewardship of FCA member Paul Merluzzi was assembled an eclectic collection of 30 significant cars ranging from a 1915 Biddle to an awesome Fiorano and Mario Andretti's 1994 Lola Indy car.

Unfortunately the rains came just after the last car had been presented to the 250 guests in front of the DuPont Mansion at Brantwyn. It is too bad that no one took any pictures of me driving back down the half mile road to the lot where Matt and Garth had the trailer ramps out and ready for my arrival while I was struggling to keep the umbrella over the cockpit and shifting and steering in the downpour.

Following the expansive brunch there was a very short awards ceremony where the little blue car once again was voted the Best of Show Peoples Choice Award. I find it interesting that so many folks like the car.

I must compliment Matt Brown and Garth Kaliczak of White Horse Auto Concierge for truly extraordinary service. Not only for car and driver care but for performing photography services as well. Some of that product follows, note the last shot nicely reflects the weather results!

Best regards,
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Past: 500 Mondial S2 0556(0446)/MD owned 58 years from June 1960 to August 2018
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post #143 of 796 Old 10-03-2011, 10:21 AM
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Admiral- That really is a beautiful car and congratulations on another win.

Looks like you need a new sign.

Taz
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post #144 of 796 Old 10-03-2011, 10:25 AM
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Beautiful, Admiral, just beautiful!

Salve,
Capo

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post #145 of 796 Old 10-03-2011, 10:53 AM
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Fantastico Admiral!!!!




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post #146 of 796 Old 10-03-2011, 12:23 PM
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I see I am not above the minimum age to attend this event so all is good. Congrats on yet another well deserved win!



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post #147 of 796 Old 10-03-2011, 12:27 PM Thread Starter
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Dear Ed,

Talk about minimum age, Fred Mack was there with his original 1953 XK120 Jaguar which he has owned for 57 years. He turned 100 last March!!!

Best regards,

Robert

Past: 500 Mondial S2 0556(0446)/MD owned 58 years from June 1960 to August 2018
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post #148 of 796 Old 10-03-2011, 05:15 PM Thread Starter
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Dear gearheads,

Here comes the next segment on the Lampredi cam and cam follower design. Remember this is early fifties advanced design work.

The camshaft contours in the type 111 motors (500 Mondial) were identical (same Ferrari part numbers) to the ones used by the type 119 motors in the 750 Monzas. Their timing was quite radical with open duration for intake of 310 and exhaust of 306 and an exhaust/intake overlap period of 98. All of the type 111 cams had 11mm lift while some of the type 119 cams had 13mm lift. It is clear that the design was for power in the higher rev ranges. The cam lobes drive needle bearing roller cam followers which in turn act directly on the ends of the valve stems. The cams themselves are hollow and are fed oil at engine pressure through their center bearing. There are oil outlets at each bearing and at each cam lobe. The alloy roller bearing cam followers are mushroom shaped with hardened steel inserts at the bottom. The valve clearance is set by the thickness of the circular shim between the follower and the hardened tip. The nested coil springs have only one job in life and that is to keep the roller follower in contact with the cam profile. That makes the job of installing the camshafts quite a chore. The rollers themselves rotate on 19 needle bearings on a cross shaft held in place with a circlip. The photo of the Jaguar Co. analysis gives a good overall picture of the setup.

Enough for this lesson.

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Past: 500 Mondial S2 0556(0446)/MD owned 58 years from June 1960 to August 2018

Last edited by Admiral Goodwrench; 10-03-2011 at 06:23 PM.
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post #149 of 796 Old 10-03-2011, 11:39 PM
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Quote:
Originally Posted by Admiral Goodwrench View Post
Dear Ed,

Talk about minimum age, Fred Mack was there with his original 1953 XK120 Jaguar which he has owned for 57 years. He turned 100 last March!!!

Best regards,
Amazing. I hope I get to be so lucky.


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post #150 of 796 Old 10-04-2011, 06:52 AM
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Thanks for the lesson admiral. very interesting detail and excellent pictures. You should write a book.



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post #151 of 796 Old 10-04-2011, 12:32 PM
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Admiral- That is some precision machining. Quite a bit of lift, too. I think my 575M is only 9 mm, so that much lift and that much timing overlap is pretty wild tuning. No wonder she pumps out so much hp for only 2 liters.

When I put roller bearing lifters on a solid cam 327 in the olden days, it became very difficult to measure valve clearance. We always adjusted valve clearance with the engine hot and running, but the only way 500 clearance could be adjusted is cold by rotating the crankshaft, like on my earlier Ferraris with shims. Do you have to depress those springs to change shims?

Taz
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post #152 of 796 Old 10-04-2011, 05:42 PM Thread Starter
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Quote:
Originally Posted by tazandjan View Post
Do you have to depress those springs to change shims?
Dear Terry,

With the cam boxes installed there is no possible way to measure the gap between the top of the valve stem and the bottom of the tappet tip. It is also not within my strength limits to depress the roller follower and then measure the gap from the roller to the cam lobe. What I do is to install the followers and cams without placing the nested coil springs, then using regular feeler gauges I measure the clearances from the top of the rollers to the cam profiles at the base circle. With all eight measurements I then play the game of trying to match the existing circular shims with the different followers to give me the right clearance for all. Inevitably I need to head over to the cabinet with the shim stock and cut out a few new ones. Then I remove the cams and install the nested coil springs and fight the cams into place, of course ensuring that the driving gears mesh at the right tooth for correct timing.

Although the motor is in a sports car, it is exactly the same design as the 1954 Formula 1 553 motor hence the relatively advanced design concepts. The photo is the bottom side of a cam box, note the casting number. My favorite technical writer Karl Ludvigsen in 1955 called it the most complicated motor of the time.

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Past: 500 Mondial S2 0556(0446)/MD owned 58 years from June 1960 to August 2018
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post #153 of 796 Old 10-04-2011, 05:48 PM
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Admiral- Undoubtedly a real racing motor and F1 proven. Thanks for the explanation on the valve clearances. Definitely not a simple thing to do.

Engineering like that always fascinates me. Fred Murrin and I have collaborated on a couple of magazine articles on WW-I rotary engines, and your four cylinder is no less interesting.

Taz
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post #154 of 796 Old 10-04-2011, 05:59 PM Thread Starter
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Dear Terry,

Do your friends have a club for airplane crash survivors? First you know Russ Turner and now Fred Murrin.

Best regards,

Robert

Robert

Past: 500 Mondial S2 0556(0446)/MD owned 58 years from June 1960 to August 2018
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post #155 of 796 Old 10-04-2011, 07:02 PM
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Admiral- Luckily all are doing well. Fred got bitten by the Sopwith Camel's fuel pressure system that had a hand pump for pressurizing the system. Fred had never used it with the tank low and the pressure head in the tank bled down to where it would no longer deliver fuel. Motor quit at too low an altitude to recover, so he pancaked it and spent some time in the hospital. That was undoubtedly the best reproduction Camel in existence, with a real Le Rhone rotary, like his Fokker F.I Triplane replica.

At least Russ and Fred survived. Many of my F-111 friends did not.

Taz
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post #156 of 796 Old 10-05-2011, 01:10 PM
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Since we're talking about the crazy duration of the valve timing overlap, I'm posting the folowing pic taken by Ed a few years ago looking straight thru the carb, intake manifold, combustion chamber and out the exhaust ports; the line interrupting the two points of light would be the valve stems. A couple of other shots by Ed - carb serial # 2!
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post #157 of 796 Old 10-05-2011, 11:14 PM
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Fantastic photo's, Ed!

Carb #2, very nice.


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post #158 of 796 Old 10-06-2011, 07:38 AM
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Thanks onno and bryan for posting them. Had a great subject so it was easy.



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post #159 of 796 Old 10-06-2011, 08:03 AM
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Ed, you should quit your day job and take up photography as a new profession.

I always appreciate your fine photography talent. All in focus too
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post #160 of 796 Old 10-06-2011, 02:46 PM
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