200tdi airbox into 300tdi auto...

I need to fit a second battery to run a heater in my 300tdi auto.....so as it has edc and an airflow meter was wondering if it would get enough air from a 200tdi airbox.I have a southdown snorkle fitted ,hence no room due to the front air intake into filter box to fit a battery.it has no abs so that wouldnt be in the way. Has anyone successfully done this? ,as dont want to buy a filterbox and piping if it wont fit. Thanks, and yes i have done a search but lots of discussion but no definitive answer or pics. Cheers,S.

Can i ask why you want a second heater?
If its just for a heater you could fit a smaller motorbike type battery.

I've got a small eberspacher diesel air heater,that i want to use for defrosting and heating the interior,as it takes longer to defrost the windows than the short trip i do to work . so i dont want to run it off the starter battery. and i cant leave the car running out the front in mornings cos of the pikey types round here ! and maybe when i win the lottery i might get a winch ........
Oh yeah, and you know the 12v plug in your lightersocket heaters ? absolute ****e and a waste of money!

you could use k +n type filter as long as you have filter doesnt matter

jamesmartin said:

you could use k +n type filter as long as you have filter doesnt matter

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With a snorkel fitted?

Well a decent size motorcycle battery should do the trick and a lot of later bikes have gel filled batterys so they can be mounted in any position you like as they dont leak. Not cheap though.