Carb mounts - Aluminium or standard rubber?

[NSharpley]

I have 45mm Weber's and the replacement rubber mounts are difficult to find.

So, aluminium mounts?  What's the general consensus?

This is for a race car, not road.

[vin sharp]

Taper a set at one end to 45 down to the other 40mm using standard replacement rubber mounts. Man has actually been to the Moon & back since 45mm all the way was last used seriously & air velocity was re-discovered!
Vin.

[bonno]

Find attached link to supplier of rubber mounts FL016 or solid aluminium FL018 to suit 45 DCOE webers  .
https://classicalfa.com/fl016-carburettor-rubber-mount-45mm/
https://classicalfa.com/fl018-solid-aluminium-carburettor-mounts-45mm-long-length/

[NSharpley]

Thanks guys.

Looks like I dont need to go down this path for now but good to know the rubber mounts are the way to go.

[carlo rossi]

what about the rest of the car and motor ?( cams pistons bearings gearbox cage etc)
surely its not whether its rubber or aluminium inlets ( dont think they ever made rubber 45 mm inlet mounts )?

[NSharpley]

The question was based around the pros and cons of using the aluminium mounts when the rubber ones expire.

There are some arguments against them, ie. excessive vibration through the carbs affecting the fuel, possible float wear, etc.

The rest of the car, particularly gearbox and cage, has nothing to do with this topic.

[bonno]

From my research the OEM rubber mounts are superior to the aluminium solid mounts. I have attached a Youtube link that covers this very topic and interestingly enough a chap that manufacturers solid aluminium mounts agrees (refer to the top comments) https://www.youtube.com/watch?v=VQ2pk38TfrQ&t=396s

[NSharpley]

Ha, I know of Jethro Bronner and have enjoyed watching most, if not all, of his videos!

That very one was what led me to request the thoughts of the Australian Alfa camp ...

His info is clearly good.

As it happens I dont think theres anything wrong with my current mounts.

[carlo rossi]

probably phrased that wrong
what i was trying to convey is that the mounts are the last of your worries
i dont believe you have a choice on the mounts you cant get rubber 45s
the only car that would have them would be an old GTA
so VIn is correct you have to taper the 40mm rubber mounts to port size and that is dependent
on what you make them
so personally if i went to 45s i would use the aluminium mid length around 65mm and use thick rubber O rings
to assist in eliminating the emulsion of fuel

[NSharpley]

Thanks Carlo ...

The car was in storage for 14 years so all rubber components were suspect.

I thought I might have a fuel mixture issue (turns out I dont) and the mounts were on my list of things to replace as I work through possible ignition and fuel issues.

But all seems well in that department after a recent test run.

Now, if you could just take a look at my other post on rear engine oil leaks and give me your 2 cents worth on seals and gasket prep I would be much obliged.

[carlo rossi]

yes they fixed the issue as i posted do the cigarette seals
cheers

[NSharpley]

Did them.  Doesnt leak stationary but leaks after being driven.

I suspect sump gasket seal at the back.

[bonno]

Hi Guys
With the oil leak problem (cigarette seals), I will reply on the applicable post so not to confuse the subject.
Cheers
bonno

[NSharpley]

hate to ask but when you did the cigarette seals did yo/u shamfer
the seal to a round point and then put silastic in the hole jamb them in and then dont cut the end off too deep
very very slightly proud so when the sump goes on it pushes the seal in the other issue can be the cam shaft half circle rubber
at the ends they crack and shrink as well
i feel for you it cost me $1500 and alot of headaches until i spoke to robert

Didnt do those things ... will now.

Thanks