"D"'s Carburators Revision - Ferrari Life
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post #1 of 26 Old 08-03-2014, 09:57 PM Thread Starter
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"D"'s Carburators Revision

For 2-3 weeks, my mechanic revisioned "D"'s carbs compleately in a nuts and bold fashion. The first photo will show you how the carbs may "deform" over time thru heat, wear, gaskets and push and pull thru screws (nothing new to you guys I would guess but impressive in photo for a non-professional like me). As a unpleasant effect, the carbs may soaking additional air, a unwanted effect in many senses. Also every part within the carbs have been changed, or aligned anew. The "accelerator pump" membrans replacement being just one prominent example as they started to being stiff and unfunctional as well. When looking at the whole working process to fine adjust all details withsome very fine welding and drilling processes even for some base casket adaptations, I developed even higher respect for that kind of craftmanship.
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post #2 of 26 Old 08-03-2014, 09:58 PM Thread Starter
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and some more..
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post #3 of 26 Old 08-03-2014, 10:00 PM Thread Starter
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and some..
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post #4 of 26 Old 08-03-2014, 10:06 PM Thread Starter
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Also, when I bought "D" many years ago, the front hood levers (strouts?) have not been the original one's. I waited to replace them until they gave up their work which has been the case now.
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post #5 of 26 Old 08-03-2014, 10:52 PM
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212, must compliment your undivided attention to your D, keeping her in tip top shape. Great detail shots and look at that engine bay, still looks so fresh and clean too.

w/ smiles
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post #6 of 26 Old 08-04-2014, 01:43 AM
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Wow, that's an incredible amount of work.
Very impressive.

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post #7 of 26 Old 08-04-2014, 03:17 AM
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Quote:
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the front hood levers (strouts?)
"Struts."

Lovely work on the carbs, 212. My GTC was transformed after they were redone, I am very keen to hear your impressions once she is back on the road.

I love to see the old classic engineering, fantastic.


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post #8 of 26 Old 08-04-2014, 04:10 AM
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Quote:
Originally Posted by 212Export View Post
For 2-3 weeks, my mechanic revisioned "D"'s carbs compleately in a nuts and bold fashion. The first photo will show you how the carbs may "deform" over time thru heat, wear, gaskets and push and pull thru screws (nothing new to you guys I would guess but impressive in photo for a non-professional like me). As a unpleasant effect, the carbs may soaking additional air, a unwanted effect in many senses. Also every part within the carbs have been changed, or aligned anew. The "accelerator pump" membrans replacement being just one prominent example as they started to being stiff and unfunctional as well. When looking at the whole working process to fine adjust all details withsome very fine welding and drilling processes even for some base casket adaptations, I developed even higher respect for that kind of craftmanship.
Hello 212 !!
Great nice work on your carburetors, from the kind of manufacturing they are Weber, you will see that your "D" engine will change from night to the day especially at low load and during transitories ....
Compliment for your undivided attention to your car, and the engine, still looks so clean too.
You know that the unique characteristic of some Weber (not all werber)was to have the "accelerator pump" made by a little piston.
I have a friend that is an artist of carburetors, he restored the four W 38 DCNL of my Maserati quattroporte engine 4.2 1968, they was locked before, after restoration like new, and the engine run like a rolex ... ahaha

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post #9 of 26 Old 08-04-2014, 05:30 AM Thread Starter
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@ Fabio: Yes, know about those pistons in the pump, a evening filling theme on itself. And yes, the low rpm level torque is very different than before, definitively more powerful, the Diff is working hard and I have to be careful to not "throw" the back of the car..... New tires soon in the plan too...maybe Avons just because of the new handling theme...will see.
Also torque feels more linear than before. Again pedal push with steering inclination gets frightening. Will Need to relearn "D" driving. Used to that behavior with "F" and "Scudeli" but "D" IS different.....


How is Linda ?

@ Onno: Thanks for the correct word...my english as always: +*&%"
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post #10 of 26 Old 08-04-2014, 08:12 AM
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@ Fabio: Yes, know about those pistons in the pump, a evening filling theme on itself. And yes, the low rpm level torque is very different than before, definitively more powerful, the Diff is working hard and I have to be careful to not "throw" the back of the car..... New tires soon in the plan too...maybe Avons just because of the new handling theme...will see.
Also torque feels more linear than before. Again pedal push with steering inclination gets frightening. Will Need to relearn "D" driving. Used to that behavior with "F" and "Scudeli" but "D" IS different.....


How is Linda ?

@ Onno: Thanks for the correct word...my english as always: +*&%"

Hi R.,
Linda is good, she is in good growing, we went last week in mountain in Madonna Di Campiglio for holiday, L have appreciated.
I'm sorry that she will never know her paternal grandfather ....

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post #11 of 26 Old 08-04-2014, 08:16 AM Thread Starter
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Hi R.,
Linda is good, she is in good growing, we went last week in mountain in Madonna Di Campiglio for holiday, L have appreciated.
I'm sorry that she will never know her paternal grandfather ....
Good to know she's doing well. Yes, a sad fact reagarding Lindas grandfather...same occured to my 4 childreen..they never met my father.....
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post #12 of 26 Old 08-04-2014, 10:16 AM
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212- Your D's engine compartment looks much cleaner than mine did when she was only 8 years old. I can see where that warped base would really lean out the mixture from all the additional air leaking inside. Would have taken pretty thick intake manifold gaskets to seal that leak. Glad she is doing better and yes, no nannies on a GTB/4, except for the limited slip differential. Lots of torque for the late 60s, early 70s, especially on skinny tires.

The new XWXs are supposed to be much better than the originals, plus they are great in the rain or light snow with the open tread pattern. Not that D will ever likely see snow.

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post #13 of 26 Old 08-04-2014, 01:02 PM Thread Starter
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@ Terry: D has been driven once in unsalted snow......but it becomes a real handful to drive....not recommended.
@ Jimmy: thank you!
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post #14 of 26 Old 08-04-2014, 01:06 PM Thread Starter
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212- Your D's engine compartment looks much cleaner than mine did when she was only 8 years old. I can see where that warped base would really lean out the mixture from all the additional air leaking inside. Would have taken pretty thick intake manifold gaskets to seal that leak. Glad she is doing better and yes, no nannies on a GTB/4, except for the limited slip differential. Lots of torque for the late 60s, early 70s, especially on skinny tires.

The new XWXs are supposed to be much better than the originals, plus they are great in the rain or light snow with the open tread pattern. Not that D will ever likely see snow.
So far i like the XWX's very much, their smooth Runs and feel on long journeys. The looks as well. But the handling with the Avons must be very different. Maybe worth a try for a set before going bsck to the originals over again ?!

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post #15 of 26 Old 08-04-2014, 01:15 PM
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212- Cannot hurt to try them. Not much exposure for Avon tires here in the US, but they love them in the UK, it would seem.

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post #16 of 26 Old 08-05-2014, 02:50 PM
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@ Onno: Thanks for the correct word...my english as always: +*&%"
Haha, not in the least my friend and who wouldn't be jealous of your command of languages, German, French, Italian, English, all at a high standard? Probably some Spanish too. I just wonder when you're going to work on your Dutch? Might be handy for FLED Surinam.


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post #17 of 26 Old 08-05-2014, 09:02 PM
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212- You want to get a laugh, you should hear me speak German or, even worse, try to write it.

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post #18 of 26 Old 08-05-2014, 09:29 PM
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212- You want to get a laugh, you should hear me speak German or, even worse, try to write it.
Are you the missing 6th Monty Python member, Taz?


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post #19 of 26 Old 08-06-2014, 04:49 AM Thread Starter
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212- You want to get a laugh, you should hear me speak German or, even worse, try to write it.
But german is much more difficult, believe me.

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post #20 of 26 Old 08-06-2014, 05:04 AM Thread Starter
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Have driven "D" now about 500 kilometers after revision of the carbs. Some impressions:


1. Cars runs more meager, no hint of black smoke at all when warm and pedal pushed to the ground.


2. Power from very low rpm's 1'-1'500rpms goes very linear up to 7', no hole or interuptions anywhere. (Accelerator pedal needs to be tamely treated)


3. V12 shreeks wonderfully, there is no such thing sounding better than a V12 shreek!


4. Oil and water temperature have been always around 70' celsius when driving at 3-3'500 long autobahn stretches, now both are steady at 80' celsius. Maybe a hint that before the engine was on a "too fat" setup (or on a "leaking carb'" setup)


5. When the engine is hot and I drive thru town with 1'5 - 2'5 rpm on steady, almost no touches on pedal or totally off the pedal, the exhaust "shoot's" slightly sometimes. Maybe a give up to the more "meager" carb mixture. (Of course it should not be to meager to risk anything especially valve wise).


Will drive another 500 Kilometers to see how everything settles together.


Any thoughts ?

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Last edited by 212Export; 08-06-2014 at 12:17 PM.
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