Fulvia cams and tuning

[FulviaHF]

Hi Guys,

There seems to be lots of talk about the Lancia/Fiat twin cam engine, but can you find ANYTHING on the Fulvia powerplant and how to squeeze more out of it? Not a chance! :(

Does anyone know of a resource for Fulvia cam profiles for instance? Or is anyone willing to share their profiles and experience with me? The same goes for any mods to Fulvia engines - particularly the 1600.

My plans: After reading some very generic texts on head work I'm going to have a go at opening and matching the intake/exhaust manifold openings and see what can be done in the airways to improve flow. I'd like to try a set of Dell'orto 45's as well but you hear so many pro's and cons for these on Fulvia engines. And I guess the stock exhaust system looks a bit "pea-shooter" as well...

Any opinions/technical help etc most gratefully received!

Thanks :D

[chrisc]

Speak to Omicron Engineering, they race a fulvia zagato and can give you countless tips I suspect.

[FulviaHF]

Thanks Chris - I must give them a bell again soon.

What I was really after was more the "I'm using a Variante 1016 cam and I'm getting great results at 6k + but no low end using this particular set-up" or "have you tried doing this to the ports yet?" kind of thing which you don't really get from a retailer. Maybe I ought to wander along to some of the club race days and ask some questions?

I was just surprised at how active some of the discussions on eg tc engines are and how inactive they are for the Fulvia. A world shrouded in secrecy?!

Just trying to provoke some interesting discussion that hopefully others and myself can learn from.

[omicron]

The Fulvia engine was only used in the Fulvia. The Fiat / Lancia twink engine was used in countless models - hence a lot more information.

Standard engine - 115hp

Variante 1016 spec - not just cams, but also included 45mm carbs (rather than 42mm), higher compression ratio and more hand work to cylinder head and manifolds - 130hp

We have a rally cam that is very flexible but superior to the variante 1016 over the complete rev range. This was originally developed by one of the (now deceased) works tuners in Italy.

It works very well indeed, still usable low down. We also have a cam optimised for torque rather for power.

Many of the Fulvias racing in the UK are using these cams.

[ecoangel]

Have a look at www.verelancia.com and www.lanciaracing.com for race spec V4 Fulvia engines in Europe

Cheers

[lanciaracing.com]

FulviaHF,

The reason you are not seeing too much on the web on people's experiences with different options, is that there is so little documentation on how to tune a fulvia engine to start with. Still you see fulvia's go fast, but that is all by knowledge in people's heads and not from tuning books. Furthermore the number of these projects is not too high and the costs for making serious mods to your fulvia engine are sometimes outrageous.

But to unviel some of my experiences see my engine rev at http://www.lanciaracing.com/video/inboard.wmv . The rev counter goes to 7000, the engine 7200 in the video, 7500 would be max.

- This engine runs on 36mm choke 45mm dellorto's DHLA. Great for on the circuit, but not enough torque at lower revs. Not the best option for fast street use
- I use 30mm choke 40mm webers as well. Super for torque. Tops out at 6500revs or so. Webers are more difficult to fit under the bonnet. I would recommend 40mm dhla's instead
- I never use solex stuff.
- remake of complete gr4 exhaust system. +8hp, but costly
- wilder high lift cams. The secret part.... Very noisy in the inlet.
- have your crank and flywheel (I have alloy ones if you want) plus rods balanced. They do a much better job now than in '70.

Hope this helps.

[omicron]

Some racing series do not permit changing carburettors. Most Fulvias circuit racing in the UK have to stick with the original Solex carbs.



Andrew

[lanciaracing.com]

That is true, Andrew. I forgot. Probably the whole of continental Europe is jealous of your race series there (like the HSCC).

[omicron]

:-)

Yes, the HSCC does insist on all cars retaining the original inlet manifold and carburettors. They won't change the rules, but at least the Fulvia already has twin carbs. The Betas and Montecarlos have to stick with the single carb setup.

There are other series which permit carburettor changes, but these tend to have more modern cars racing and few Lancias. Its often nice to race against other Fulvias, purely as a bit of a benchmark - you verses me in similar cars...

Andrew

[FulviaFanalona]

:-)

Yes, the HSCC does insist on all cars retaining the original inlet manifold and carburettors. They won't change the rules, but at least the Fulvia already has twin carbs. The Betas and Montecarlos have to stick with the single carb setup.

There are other series which permit carburettor changes, but these tend to have more modern cars racing and few Lancias. Its often nice to race against other Fulvias, purely as a bit of a benchmark - you verses me in similar cars...

Andrew

hi there

Does that mean I can use (if I can find them) solex 45's with variante 1016 addtions for HSCC? and what about homologation of modificated parts for group 4 such as del'orto 48's (or did works use 48 DCOE's) petrol tanks, wider arches and so on?

[omicron]

Arguing with the HSCC generally gets nowhere, but good luck to you if you do!