Longer carburettor mounts

[DHDamo]

What would happen if I put these on my engine (I have access to some)? I have 10548 cams and pace extractors, the rest pretty stock?

[kartone]

No good, I'll take off your hand!

[carlo rossi]

they say 65mm is the optimum if you look at the original air box for a late model they have the runners inbuilt
get the original box

[DHDamo]

Sorry, my bad I actually mean carb mounts. Longerc solid carb mounts, rather than the rubber ones. What are the benefits and will they potentially work with current setup. Parts places say they improve midrange horsepower etc - is this true or only in 'everything tuned perfectly in sync' situations?

[Craig_m67]

I read on various forums that the solid mounts are not recommended for everyday driving as the carbs don't like the vibration. Buggers up the float needles etc. requiring frequent maintenance.

Only what I've read though, no experience with them.

[DHDamo]

I read on various forums that the solid mounts are not recommended for everyday driving as the carbs don't like the vibration. Buggers up the float needles etc. requiring frequent maintenance.

Only what I've read though, no experience with them.

Ok, cheers that's still info I'll consider.

[105gta]

Do they replace the rubber mounts or are they extensions? Ideally you want extensions, the mounting flanges line up with each other, and continue to use your original rubber mounts. Other wise you'll have to get the generic rubber mounts used for after market side draught applications. If they're extensions then happy days, you'll need to extend the carby support bar to but that's easy. At the lower mount that bolts inside the engine mount just use a longer bolt and sit it on top of the mount with some large washers that clamp on the mount when tightened. ran a car like that for years.
You'll notice smoother running in the midrange and lower end. Not a massive power gain but certainly better.

Do an experiment and bolt them on, get dirty and enjoy your Alfa and what it stands for, tinkering on the weekends and understanding what things do
If they replace the original mounts still try it. If you like it then invest in the aftermarket mounts.

[DHDamo]

Ok, cheers for that 105gta. I don't have them (in storage) but I think they replace the rubber ones. Will have to get my hands on them and have a look. I guess I was just looking into whether it could be done in isolation or whether more 'intensive' mods had to be done. Better does sound better tho.

[carlo rossi]

for racing great more midrange
for road over time too much vibration
this came from a number of sites not personal experience
these came about due to the shortage of the late model siamese rubber mount

[jazig.k]

Can you get plain extensions to use with the rubber mounts? I've never found them before, but haven't looked for a long long time. Makes a lot of sense to me to try and keep the rubber mounts for a regularly driven road car.

[carlo rossi]

I beleive it one or the other not both
go to dellorto Uk site
or eb spares Uk

[105gta]

You used to be able to get them, I've seen them in alloy, quite easy to make out of an old set of Alfa rubber mounts, just burn the rubber off and weld a tube between them at any length you like. On one end drill out the threaded stud holes I the existing studs for through. (8mm) on leave the studs in the other end. Done

As for the Siamese mounts...  if you run the original airbox, that links the carbs to be mounted parallel, so Siamese not needed. If using trumpets it individual it filters just make a small plate that bolts to both carbs so they are locked together. Also gives you something to bolt the original carby stay bar to. That takes the weight if the carbys and the mounts allow them to wiggle through the vibrations. The stay bar is the most important thing if all these mods.  The original rubber mounts aren't designed to take the weight of the carbys.

[Neil Choi]

Like this?

[vin sharp]

I have made aluminium casting ones for use with original carb mounts for 30 years now, still sell & carry them in stock.
Have sold quite a few in recent years to people replacing the solid mount billet types that give carb troubles.
Regards,
Vin Sharp
PACE Eng.

[Neil Choi]

Funny, Vin, I was about to make mention of you having them!!!!!  I was actually wondering when you will chime in.