International Lancia Forums

So I'm girding my loins to check and adjust (if necessary) the cam timing on my '72 Fulvia 1,600 over this coming winter. In advance I'm doing as much reading as I can. I do have the "Concise Workshop Manual" (bought here), and have found snippets here and there. All point to extensive instructions/observations/advise offered here, especially by our leader, Huib.

The problem is that when I click on the link from other forums linking here, the links no longer function because of the upgrades to Viva-Lancia. I cannot, for the life of me, find the originals here. Can someone please steer me toward them--and toward any other discussions/instructions on checking and setting the cams on my Fulvia.

Here are the two links I tried to open: http://www.lancisti.net/forum/showthrea ... ractor-DTI http://www.lancisti.net/forum/showthrea ... 1-3-Fulvia

Are you looking for this one? posting.php?mode=reply&f=10&t=8149

Or this one

viewtopic.php?f=10&t=669685

Thanks for that, Huib. I'm not sure those were the two articles because I couldn’t open them before, but I will certainly add them to my growing pile of stuff on cam timing. Any other step-by-step sources would be gratefully appreciated.

Yes. This posting.php?mode=reply&f=10&t=8149 is the one.

Since a few hours I have the old forum running in a Virtual Box with Server and PHP software of 2012. It can be installed on a Windows 10 machine. It runs complete with pictures and other attachments showing.

I can sell you a download at 100€. The file plus Virtual Box software is 15GB.

Hi, I have checked the cam timing on my S1 Rallye 1.3S (818.303 engine, 818.342 cams) using the method described by Huib (2.2mm clearance +0.1mm to check). At 0.1mm both cams' timing is out by about one tooth on the flywheel (one tooth after/ left of "0") which should be about 3° as far as I know.

Should I try to rectify this or is it close enough?

Can such fine adjustment be made on the vernier cams? The hole spacing in the cam wheel looks quite big so I assume there is a different amount of holes in the cam, otherwise such fine adjustment will not be possible?

Thanks

i'm not positive,and maybe huib can shed some light, but i thought the vernier cams had 1/2 degree resolution, so yes, you can get closer than what you have.

In the sprocket wheel there are 12 holes, in the camshaft 11. Or the other way around. Anyway, 11 x 12 = 132 positions.

That is 360 / 132 = 2,7 camshaft degrees which is 2,7 x 2 = 5,4 crankshaft degrees.
On the series 1 each tooth is appr. 3,5 crankshaft degrees
Moving the pin 1 position equals 5,4 crankshaft degrees which equals 5,4 / 3,5 = 1,5 flywheel teeth.
That is not accurate enough.

Fortunately we have more possibilities. We can change a tooth on the sprocket wheel. The sprocket wheel on the crankshaft has 19 teeth. 19 is a prime number. By jumping teeth we can multiply the number of positions by 19. Instead of an accuracy of 5,4 crankshaft degrees we now have an accuracy of 5,4 / 19 = 0,3 crankshaft degrees. Converted to flywheel teeth, 0,3 degrees equal appr. 0,1 tooth