Under Battery Cai Vs. Airboxed 3" Cai &. 4" Cai

[RSK]

Hey people,

Currently going from a 3" CAI in an airbox and wondering what the difference would be going to a 4" CAI?

Has anyone done the change and what were the noteable differences?

Advice from anyone that's gone from an under battery setup to a 3/4" CAI with airbox would be good aswell

[DesFlurane]

Went from under battery Plazmaman to 4" PW and made the same power. But will support more eventually.

[KIL-06L]

RSK tried sending you a pm but your mailbox is full. pm me ASAP!!

[RSK]

Woops, all fixed up.

I'm still running the 3" CAI in a plazmaman cold air box

[RUS531]

I might get grilled by saying this but I would not put an under battery CAI in my car due to the fact that they look like they will be a pain to service and they are down too low and in front of the front wheel that kicks up dirt/dust and water. I've got the PW cai box and if it ain't recieving enough air I don't know what will. Am I correct in saying that you have to do some cutting to install the Under battery cai

[mattyb]

The UBP works well, and wasn't that hard to get to. it is enclosed really well too if you keep the undertray on your car. I have changed to a Rapid 4inch intake from the ubp, only cos I'm trying to 'over engineer' my car so I don't blow it up again, pmsl. That and I really wanna tidy up my engine bay... big car show on soon!

It has actually crossed my mind to install a standard headlight on my drivers side, so it allows air through the 2 scollops from where the xr headlight would normally sit into my air box... I think it would look sh*tty but am gonna give it a go n e way, have a headlight from my work car I can experiment with it b4 installing my motor.

Edited 20/02/10 01:51 AM by mattyb

[RSK]

Pics if you end up switching to the standard XT lights would be good, as that's not a half bad idea

[FAST-XR]

a 2.75" (70 mm) intake from from rapid/plazmaman is bigger than the inlet of the tubo, so is it really necessary to upgrade to a 4" intake? is the extra hassle of battery relocation not worth it?

[Nomis]

I would also like to know peoples thoughts on this but I am more talking about the differences in sound with the air box vs under battery cai

[fordboy1981]

a 2.75" (70 mm) intake from from rapid/plazmaman is bigger than the inlet of the tubo, so is it really necessary to upgrade to a 4" intake? is the extra hassle of battery relocation not worth it?

I agree... plus I don't really see what's wrong with stock airbox (with 2nd intake) and piping. it's a bit long, but the diameter should be enough...