18 replies to this topic

[MiniGT5]

Apart from fitting a heater has anyone done any other mods to cure carb icing on a vmax SC setup?

I was thinking perhaps close off the section behind the grill infront of the carb with sheet alloy ?

Also is there a way to duct hot air from the exhaust LCB ?

Cheers
Neil.

[minipete]

Don`t one of the companies that do SC kits sell a K&N airfilter with a heated element in to stop this problem?

[Sam Walters]

Apart from fitting a heater has anyone done any other mods to cure carb icing on a vmax SC setup?

I was thinking perhaps close off the section behind the grill infront of the carb with sheet alloy ?

Also is there a way to duct hot air from the exhaust LCB ?

Cheers
Neil.

Yeh, do it properly with a blow though setup.

[joe90]

do what i have done & add a element into the k&n yourself. you can buy the part from RS for a tenner.
look at thread "diy superchager" (it runs) got the part Number on there.
joe

[joe90]

O forgot to mention a sheet of ally wont do anything. carb iceing is caused by the increased air speed in the carb. most minis dont suffer because the carb is sat on top of the exhaust.

[shellspeed]

Spread the Gospel Joe and denounce the the nay saying blow throughers and turbo tarts. Only joking. Don't want to start another fight!

[MiniGT5]

Think I will fit one of the rs heaters

but I was also thinking at the moment I have no front grill so loads of cold air when driving if I blanked it off with sheet alloy it might raise the temp in the engine bay ???

Neil.

[chinner]

Here is the solution i used. I was suffering from icing in the cold damp mornings we've been having lately, on one trip to work I opened the bonnet to see this.


I looked at the vmax scart option but didn't fancy the £100 price tag and opted for the free water heated K'N! I mabe a a coil to fit inside the filter (not an easy fit, you can only fit 2 turns in the bottom and 1 in the top, forming a figure o' eight inside the filter)


Add a couple of pipe reduces and plumbed it in to my heater line ( i have no heater so you would need to T off it if you have), open heater valve and hot water circulates through the filter and back to the bottom hose. Going to add some coils to the intake pipe on the Mk2 version. This fixed the carb icing nicely.

Edited by chinner, 02 April 2010 - 04:21 AM.

[adam_93rio]

that idea above is amazing! i will have to look into this when fitting downdraft webers.

has anybody used webers on a supercharged setup? (sorry bit off topic)

[MiniGT5]

Cool I like that idea what pipe is that and whar are the couplings off?

Looks like microbore heating pipe does it restrict flow to heater?

N.

[chinner]

Its 1/4" stainless pipe and "Swagelok" adaptors that i use at work. I see no reason why you could not use copper pipe. You could use 15mm to 6mm adaptors from a plumbing supplier. I don't have a heater in the car, if i did it would be better to T off of the heater circuit, maybe with its own isolator valve.

[minidaves]

physics comes to mind and power loss, fuel traveling through air is going to freeze, warm up the air and lose power. you dont want suck through you want blow through, and remember supercharge life is approx 15-20k when passing fuel through it compared to 80,000-100,000 when it only has air passing.

dave

[miRon]

that idea above is amazing! i will have to look into this when fitting downdraft webers.

has anybody used webers on a supercharged setup? (sorry bit off topic)

i thought up this idea years ago....

no real need for weber's , as the charger setup's dont make the power or fuel demand to warrent this.....

[miRon]

physics comes to mind and power loss, fuel traveling through air is going to freeze, warm up the air and lose power. you dont want suck through you want blow through, and remember supercharge life is approx 15-20k when passing fuel through it compared to 80,000-100,000 when it only has air passing.

dave

same as not being able to use diesel turbo's on petrol engine's.....

[chinner]

Yeah the SU carb is enough for the charger setup. If it losses a few horses to stop it icing then so be it, you can always shut it off with the heater valve. When i go back to the rolling road (2 weeks) i will try it with the heater and without and see what the difference is, will be interesting to see what happens. I think that some cars out there (montego maybe?) had a water heated carb fitted any way. I gave up looking into it more as its only really cold days that are a problem and this fixed it for free.