Igt foam filter

[Robbie224]

Would a igt form filter on twin hs2 carbs need re-tuning air/fuel mix? Previous set up was twin air box with standard filters inside.
Thanks

[Exminiman]

Would a igt form filter on twin hs2 carbs need re-tuning air/fuel mix? Previous set up was twin air box with standard filters inside.
Thanks

You would be very lucky if it didn`t - but who knows you may be very lucky

Worth just running the car (assuming it runs ok) for a while and then taking out the plugs and checking colour.

Will give you a an idea as to whether needs a tune up again.

[Robbie224]

I'll do that once we get some better weather. Hoping it will make a difference as spark plugs have always been black when taken out. Possible lack of enough oxygen using the current twin metal filter box. Another option is try metal filter box with k&n filters instead of standards. Chance of less smelly tick over and maybe few more horses. Gonna try MED stubstack igt set up first.
Time will tell.

[Oneball]

Sorry to say it but if I’m reading it right what you’re doing is wrong. Changing the air filters to a different type is not the way to sort out a poor running engine.

For the price of an MED air filter package you could get you car properly set up on a rolling road.

Whereabouts are you there’s plenty of people here who can recommend someone local to you

[111Robin]

Your money would be better spent on Mr.Vizards bible if you really want to maximise power output. Unless you're running at full throttle in a race situation you aren't going to make much difference bolting on another air filter. The A series has been running with the standard filter arrangement for so long now and without any issues there is no reason to suspect your issues are caused by this setup. Do you know what needles you are running ?.

[Herbert]

It will run very lean because the engine will be able to suck in more air.

[Peter Laidler]

I'm with no-nonsense Robin here.

Air filters do one thing. They filter air by restricting the amount of road and atmospheric residue that would be inducted into the carburettors. Nothing more - or less! (not EXACTLY correct for the pernickety, but but near enough for our road cars) The difference between them all is the rate at which they allow the air to flow and the amount of crap that they prevent.

I seem to remember something relating to the Unipart research that said you can have GOOD air filters that will prevent even the smallest amount of crap through, but they won't let any air-flow through either! OR you can have NO air filters and let 100% of the crap through. But you can have a best compromise

I'll say it again and again, that Unipart who performed the only scientific based research on the subject, carried out at Aston Uni, on their behalf was that those made by Coopers were the best all-rounders.

Good looking or trendy air filters/cleaners don't necessarily equate to good air-flow filters. Not what the sales and suppliers of other makes and types want to hear, but there it is.

[Robbie224]

Hello.
Just to clear things up my mini has been rolling Road tuned 10 months ago by Airey Tuning. It has twin hs2 with metal cooper metal box with mini spares paper elements. I have already David Vizard book 3rd Edition. Reading from Filtration section the metal filter box drawing in hot air from exhaust area isn't perfect. Mini drives very well.All I'm doing is trying to get best performance I can which is why I wanting to try igt foam filter .admit it doesn't look any we're as good as cooper metal box. Also I have 2 k&n elements to replace paper ones k&n s are slight taller so tighter fit but they are smaller round for better air flow inside box. I will try both igt and k&n . Though I'm more drawn to keeping cooper s twin box . Just need some decent weather to try both.

[111Robin]

I think if you are willing to ditch the housing, the better option would be conical K&N filters straight onto the carburettor intakes so doing away with the elbows that are definitely a restriction. I don't know anything about the ITG filter but the K&Ns were always seen as the best option back when I was trying to improve things but I have no scientific proof. If you have had the car tuned on a rolling road if you change the filtration I'm guessing this will mess up the tuning and will require another visit with possible needle changes as a result.
Just looked up the price of the K&Ns.........£107 from Minispares!!!!!!! those have certainly gone up a lot since I last bought them.

[Robbie224]

Your not the first person saying the elbows add to restriction. I have thought about 2 k&n cone filters plus they look OK. I'm already in mind set I might need a re-tune. Do k&n cone filters work better with stub stacks fitted? Igt are form filters that need to be lightly oiled . Only down side is that look very modern.

[Peter Laidler]

On the other hand.......... if you are SUREthat the air filter change is going to change the air/fuel ratio to any great extent (I say that it will, but only marginally because by default, all air filters restrict air-flow by their very nature) you could use a colour-tune plug at No1 and 4 cylinder before and after the filter change. If there is a change of combustion colour, then change mixture to suit.

I know people scoff at the use of colour-tune but they are as accurate as your eyes are at differentiating slight changes in colour. That's just my non-scientific thicko's point of view

[Exminiman]

Just a thought, didn`t you have it tuned by AC Dodd a little while ago ?

Plugs shouldn`t really be black, might be worth dropping him a line, he will know the setup...

Just a thought

[Robbie224]

You are in the right ball park about AC DODD I did speak to him in relation to cold start issues . He must be a popular guy as it would of been about 6 weeks before he was down to my way. Cold start sorted now with choke adjustments plus old coil was knackered supplying a leak spark. ac Dodd booking cancelled.

[Dan Tweed grey]

I've got short ish ram stacks and motorcycle Ramair Filter socks that fit tightly over the stacks.
Not had a chance for rr tuning yet but is a simple solution .