Exhaust manifold right or wrong

[peterbaker]

Can someone please clarify. Is there a difference between 1.3 and 1.6 Fulvia exhaust manifold. My HF seems to go ok with a supposedly 1.3 manifold but worth checking.

[Zagato]

Not sure about the difference between 1300 and 1600 manifolds

But there is a difference between exhausts for Fulvias with a 4 or 5 speed gearbox ...

[LanciAlan]

... go on ...

[ncundy]

The subframe of a 4 speed car has a different rear cross member, a 4 speed manifold is slightly shorter with a slightly tighter bend radius that will clear said cross member. The 5 speed cars have a different rear cross member (it has a bend in the middle to clear the back of the, longer, gearbox). A 4 speed manifold will foul against it.

I guess I'm not the only Fulvia owner who has been down this route then.........

To answer Peters question I believe that dimensionally they are the same, but the 1600 is made out of stainless not mild, but stand to be corrected.

[LanciAlan]

Thanks Neil. Sort of thing one might not wish to find out by trial and error. Seems 4-speed to 5-speed gearbox transplants present challenges at every point of contact .... and then some! In the past few days I've read useful info about the remote change, different inner CVs, bell housing, clutch, splines, nose to flywheel, speedo and now the subframe and manifold.

[Jai Sharma]

I believe (but could be wrong) that for S2/3 cars the only difference between 1.3 and 1.6 is that the 1.6 manifold is stainless. I heard somewhere that it was to cope with the heat, but not sure if that is right (and if it is presumably only in extreme use).

[chugga boom]

both my 1600's had mild steel on them, 1 had only done 21k so i would pressume origional at that milage , as far as i'm aware they were the same manifold on both cars, maybe some had stainless and some had mild, i think the theory of "no such thing as a standard lancia" is correct up to and including fulvia's , because of their hand made nature the parts that were available were used rather than specific parts , i've seen a totally origional s3 fulvia with tubular top wish bones for example , now an expert would say thats wrong 

[peterbaker]

Many thanks guys, will check the clearances.

[Zagato]

Sorry for not replying sooner .... only just logged back in again ...
Couldnt have described it better ... in fact I couldn't have explained it that well ... all I know is mine fouled on the subframe until I changed it for the right one 

I believe that Tony Law Exhausts in Leeds can supply the correct 4 or 5 speed manifold and system - the one I have is a 4 into 2 into 1 mild steel system ... when I bought the car it had a 4 speed system on a 5 speed car ... and it fouled as described earlier ... so I purchased a new system ... only finding out afterwards that Tony Law can supply them (or so I've been told)

Hope this may help

[peterbaker]

Where did it foul exactly?

[Zagato]

On the rear cross member .... as I remember .... 

The cross member has what I can best describe as a manufactured 'cut out' or 'relief' built into it to allow the exhaust to sit up into it ... if it wasnt for this cut out it would sit below the cross member and reduce the ground clearance
 
The 4 speed exhaust doesnt line up properly with the relief and fouls on the side nearest the gearbox (sorry its from memory ... nearly 6 years ago now)

[Charles Frodsham]

An old thread this, but interesting nevertheless. I have been trying to find out more information on what exhaust manifolds are available for the fulvia, since the original is considered quite restrictive, particularly for the 1.6/1600.

Lots of useful information here.....http://var1016.blogspot.com/2007/01/fulvia-developments-part-v.html

And a magnificent example here made by hand!........https://forum.retro-rides.org/thread/213330/1966-fulvia-iniezione?page=6

I believe Omicron have a group 4 mild steel manifold.

Any experience from fulvia owners?

PS.

Regarding original manifolds, I have just checked my standard exhaust manifold (1.6 hf), and it is stainless steel. It’s not particularly shiny, but non-magnetic, so probably 300 series stainless.

[lancialulu]

Charles

Sent you a PM

Tim