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Thread: Fulvia 1,3 HF

  1. #101
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    Re: Fulvia 1,3 HF

    Hi Guys,

    I've ordered the Rotax valve adjusters and they look good.

    I've also seen drilled valve spring retainers on a 1600HF engine.

    Are they readily available? and from who?

    I want them for a 1300HF replica engine. Is there a difference between 1300 and 1600 valves and springs?

    Having had valve bothers in the past; bent valves and worn cam lobes I'm anxious to reduce loading on the cams as much as possible.

    Any suggestions on the valve spring retainers?

    Any other bright ideas?

  2. #102
    Legendary Lancista lancialulu's Avatar
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    Re: Fulvia 1,3 HF

    I thought all 1600 engines had drilled valve spring caps. Not seen anyone selling replicas. Try Cavalitto?

    Re valve spring look at the tech dati book. From memory the 1600 springs are stronger

  3. #103
    Senior Lancista bart's Avatar
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    Re: Fulvia 1,3 HF

    I recommend to carefully measure these springs and if in doubt, replace. I've seen spring caps made in titanium, never seen the drilled originals reproduced.

  4. #104
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    Re: Fulvia 1,3 HF

    Quote Originally Posted by Langap View Post
    Hi Guys,

    I've ordered the Rotax valve adjusters and they look good.

    I've also seen drilled valve spring retainers on a 1600HF engine.

    Are they readily available? and from who?

    I want them for a 1300HF replica engine. Is there a difference between 1300 and 1600 valves and springs?

    Having had valve bothers in the past; bent valves and worn cam lobes I'm anxious to reduce loading on the cams as much as possible.

    Any suggestions on the valve spring retainers?

    Any other bright ideas?

    Ned

    Try Paul at Vere Lancia, he can supply ligthweigth hardened alloy retainers. At a price...


    Cheers

    Tor

  5. #105
    Legendary Lancista Fulvia-hf's Avatar
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    Re: Fulvia 1,3 HF

    You might be able to drill the originals. Will take some measuring to equally divide the holes but it is worth a couple of grams from moving parts which is always good. I suggest having them shotpeened afterwards to restore some strength.
    Cheers,
    William

  6. #106
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    Re: Fulvia 1,3 HF

    The burning question is are the drilled 1.6HF valve caps dimensionally the same as the standard ones and how much lighter are they.

    I think the really specialist alloy ones will be prohibitively expensive.

    Langap

  7. #107
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    Re: Fulvia 1,3 HF

    The pics may answer the weight-question..Click image for larger version. 

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    Ali

  8. #108
    Legendary Lancista Fulvia-hf's Avatar
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    Re: Fulvia 1,3 HF

    So not as much as you would have hoped but the weight saving on the retainer counteracts the weight increase on the swivelfoot adjuster screw.
    At 8000rpm these things start to really matter.
    Cheers,
    william

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    Thumbs up Re: Fulvia 1,3 HF

    Last week I got my re balanced crank and associated parts back from the engine shop.

    Click image for larger version. 

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ID:	13028 Crank rebalanced With New piston/rod weights and journals polished.

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ID:	13029 ARP studs have some threads left so I made two aluminium L-shaped reinforcements to tie the studs together. This studs give a lot more capasity than std bolts. Infact you can not use all of it in this old engines so I was adviced to torque them about 20% more than std.

    Click image for larger version. 

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ID:	13030Since I have skipped the cylinder Block to crankcase gasket I shimmed the cam Chain hydraulic piston spring. Made a 2,7 mm. nylon plug at the piston end With my lathe. Hopefully this will keep the camchain from jumping a tooth when starting and engine if it kicks back.


    Click image for larger version. 

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ID:	13031 ARP flywheel bolts and an extra 12 mm. dovel will make it much stronger. This flywheel bolts are ment for a modern car, they was a bit too long but thread part is shortened for my use. Also here it is torqued Down With 20% more force than std.


    Click image for larger version. 

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ID:	13032HF rods are weigth matched, checked for trueness and have New bushings installed. Finally they are polished back to their original shine. Lancia had a +-2.0 gram weigth difference on their rod weigths, wich I think was very good back then. Also the rods are a work of art With the interlocking grind between the rod and the cap. This Ensures they alignes perfectly.


    Click image for larger version. 

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ID:	13033This shrouded HF con rod bollts are sold by Cavalitto. Same dimentions and weigths as my original bolts. Needed some 400 grit sanding and polishing to get it shiny as the original ones though. To the left is a polished Cavalitto bolt compared to a unpolished Cavalitto bolt to the rigth.


    Click image for larger version. 

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ID:	13034The Cavalitto ones finnished sanded and polished to the left, compared to one original HF conrod bolt to the rigth.





    Click image for larger version. 

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ID:	13036 Bottom end nearly completed. With this deckheigth I will end With a squish around 0.9-1,0 mm. With a 1,2 mm. head gasket and 1,2-1,3 mm. With a 1,5 mm. head gasket.

    Anyone With knowledge how much this crank/rod/piston "stretch" at maximum rpm? Each rod/piston in my
    build is 99 grams lighter than before.


    Cheers

    Tor

  10. #110
    Legendary Lancista Fulvia-hf's Avatar
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    Re: Fulvia 1,3 HF

    Hi Tor,
    keep up the good work. I see all the modifications I've made to my 1216 Hf engine several years ago. I'm still happy having made the effort. All these mods will not make it faster but are an insurance policy in keeping the engine together.
    Not sure about piston/conrod stretch but I would allow for a few tenths (mm)

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