supercharger anti-ice carb filter - opinions please gents.
Turbo Mini Forums

The question is.

Is it worth the expense of buying an anti-ice carb filter for a suck through supercharger set up. I was thinking of buying the one as sold by Stuart of V-max (£100). But if ice is not really an issue, I won't bother. The cars not finished yet, so I have not had a chance to trial the set up to see if I do get icing. I need to buy a filter either way though to get it up and running, and a standard k&n is about £40.

i wouldnt bother, if you do get carb icing then simply spend £5 on some 8mm copper fuel line and wrap it round the manifold next to the carb then plumb that into the cooling system, job done.

I wouldn't think that'd work would it Hedgehog?

I was under the impression that the icing occurs in the very mouth of the carb around the jet, surely this is the only way fuelling could be effected, as in terms of cross sec area, you're never going to ice up the 44mm appature....

I'm almost sure you're going to need the anti icing filter mate, many people with the kits have reported icing even on a hot summers day without the heated element.

Mr. Prawn, the friendly Crustacean- slowly making steps towards forced induction.

It seems to be a fundamental design flaw with thes SC setup, an anti-icing solution appears to be needed in most cases.

So basically you need to heat the air, so that it dosen't get to cold and freeze the carb, before it enters the SC and gets massively heated again!.

Would a bigger carb help?

The freezing happens around the throttle spindles I think, and the copper pipe solution has been shown to solve this by keeping the carb body slightly warm.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

In Norway, most cars were fitted with a carb heater. I always bin them, but that might be beneficial?
These were fitted to Hs2s and Hs4s, but I guess with some bodgery something can be done.

My old college tutor ran a Beetle with suck through T3 and ran a small hose into the choke blowing warm air from the heater - easy, and it can be switched off when more power is required like track days

I seriously doubt it!

as far as im aware the main reason you get carb icing on these installs is because the carbs so far away from the cylinder head that it doesent get any real heat put into it, the fact that your geting the air from the coldest place available doesent help maters but it dont think its the main/only reason.

on an na setup you have an alloy manifold a few inches long so the heat transfer you get keeps the carb warm ( ive never plumbed any of mine in)
the only times ive ever had carb icing on na was first thing on a very cold morning before the engine had any real temperature in it.
a mate of mine made up a 6" long manifold tothe charger and his carb doesent ice up at all now, even though it sticks through the bonnet

i lent him my rampipe to test back to back against a plane k&n and it made a big difference, it didnt give him much more power as his fueling leaned out a fair amount as the engine was geting more air and he hadnt changed the needle profile

Edited by MONSTER HEDGEHOG on 15th Jan, 2010.