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  Topic Review (Newest First)
08-15-2019 06:45 AM
bmarler yes, it's the block i was thinking might be useful. no corrosion present. new blocks can't be found easily i'd imagine. but then the artwork is lost...
08-14-2019 12:17 PM
Tedesco
Quote:
Originally Posted by bmarler View Post
might this be useful for parts? no reserve...
https://bringatrailer.com/listing/lancia-v6/
That is a really nice looking engine. Albeit the 813.00 is of interest for Flaminia Berlina 1st series only. Heavier flywheel, smaller inlet and exhaust valves each with single spring only, weaker rockers . . . all missing here. Anyhow, the heads are accordingly, smaller ports for inlet and outlet.

If thinking of a runner, only the unstamped block and the oil pan would be of interest. They are machined together, therefore should be used as a pair, but then you can make any engine up to 2.5 3C out of them provided nobody notices that the flange for the mechanical fuel pump is there, which it is not on 3B and 3C engines.







Or turn it into the ultimate Flaminia 3.0
08-13-2019 07:53 AM
bmarler might this be useful for parts? no reserve...
https://bringatrailer.com/listing/lancia-v6/
08-09-2019 12:20 PM
PSk If designing a modern replacement, surely a roller rocker would be the way to go.
Pete
08-09-2019 11:24 AM
Tedesco





Some pics of a fairly good rocker arm. The shape seems to be circular to me. The wear shows two more or less plain surfaces, divided by a line which is not worn. At this line the rotation of the arm complies with the movement of the valve stem, before and after the tip is sliding over the stem end, at least that is what I have concluded from the pics. Also interesting to see how Lancia machined the surface of the tip.





The shaft looks quite well, a magnification still shows many scratches. the other pic shows the underside of the shaft which is as it left the factory
08-09-2019 01:01 AM
Tedesco
Quote:
Originally Posted by B24Spider View Post
I suggest option #2.

At Walt Spak's suggestion, I followed suit in my own way. Over-size hard chromed shafts, after a clean-up grind, then all ground to the same size, and honing bores to fit. A torque plate for honing the blocks is needed, or your engine will seize upon start-up (happily no damage besides a bent pushrod, easily replaced...). As you've noticed, there is a lot of pressure on the ends of the shafts, and there is a tendency to galling of the block to the shaft. I think the hard chrome against the forged blocks is a good match (modern coatings MAY help, but I don't know how they wear).

I thought about needle bearings and shell bearings, but it would require hardened surfaces for the needles, and the shells would require a lot of effort to make, and a material that would withstand the pressure better. Both too complicated, even for (a) Lancia.

A friend has/had a jig to grind Flaminia tips, made by Fred Delong, of Delong Cams. I believe it will come my way in the near future, and will share it with you if it happens. I believe the tips were nitrided, evidenced by copper plating I noticed, if I remember correctly. I am curious what the profile was.

Anyway, I'm interested in a set, depending on cost. Do you still have free flow thermostats and radiator ducts in stock (or even the drawing for the ducts)?

-Steve
You are probably right, all kinds of discrete bearings may require a deep research before designing and then making them will be complicated and reliability will be questionable afterwards.

The part is not trivial, hence I will do some research before starting the production. First of all, some analysis has to be made:

1. rocker box

- determination of material
- sectional cut through the stressed area (hardness depth)
- surface hardness

2. rocker arm

- determination of material
- sectional cut through shaft
- sectional cut through tip
- surface hardness


Will keep you updated. It would be very helpfull, if you´d share the info you have. Thanks in advance!

Thermostats are made every now and then and there are oil circuit thermostats available as well.
Regarding the air duct, if I make one, it will be fairly expensive compared to the simplicity of the finished product. The layout of the duct is simple and I do not mind sharing the design. Will send a sketch or pics with measures, so that you can have one made locally. Anyhow I will make one for you, if you want. Should discuss this via email or pm.
08-07-2019 12:48 PM
B24Spider I suggest option #2.

At Walt Spak's suggestion, I followed suit in my own way. Over-size hard chromed shafts, after a clean-up grind, then all ground to the same size, and honing bores to fit. A torque plate for honing the blocks is needed, or your engine will seize upon start-up (happily no damage besides a bent pushrod, easily replaced...). As you've noticed, there is a lot of pressure on the ends of the shafts, and there is a tendency to galling of the block to the shaft. I think the hard chrome against the forged blocks is a good match (modern coatings MAY help, but I don't know how they wear).

I thought about needle bearings and shell bearings, but it would require hardened surfaces for the needles, and the shells would require a lot of effort to make, and a material that would withstand the pressure better. Both too complicated, even for (a) Lancia.

A friend has/had a jig to grind Flaminia tips, made by Fred Delong, of Delong Cams. I believe it will come my way in the near future, and will share it with you if it happens. I believe the tips were nitrided, evidenced by copper plating I noticed, if I remember correctly. I am curious what the profile was.

Anyway, I'm interested in a set, depending on cost. Do you still have free flow thermostats and radiator ducts in stock (or even the drawing for the ducts)?

-Steve
07-28-2019 12:53 AM
Tedesco Pete,

thanks for the link. Had some informative conversation with a piston and liner manufacturer. They suggest to try iron liners in the first step. Nicasil coating is about 370 USD per liner, not a bargain, especially when you can get along without it.

Hubert
07-27-2019 03:17 PM
PSk https://www.torquecars.com/bmw/nikasil-issue.php
Pete
07-27-2019 12:41 AM
Giovanni1985 Aluminum because it has a higher thermal conductivity
07-25-2019 04:38 PM
PSk
Quote:
Originally Posted by Tedesco View Post
I want to build a 3 liter engine


. . . honestly I would like to go for 3,2 or even 3,5
Ah, now makes sense.

Pete
07-25-2019 11:50 AM
Tedesco I want to build a 3 liter engine


. . . honestly I would like to go for 3,2 or even 3,5
07-25-2019 11:43 AM
PSk Why reduce the wall thickness? Is there a defect you are trying to solve?

My understanding is that the automotive industry has moved away from coated alloy liners and back to iron or steel.
Pete
07-25-2019 11:35 AM
Tedesco Pete

now that you are asking . . .

Talked to an expert in engine optimizing and he told me that one could reduce the wall thickness using these. The cast iron Flaminia liner has 5 mm thickness, boring to 88 mm would result in 3,5 mm. I missed asking him why alu and not iron.

Requires further investigation

Hubert
07-24-2019 02:39 PM
PSk Why Nicasil coated aluminum liners, and not iron?

Pete
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