induction box vs intake

[Bigalow]

ARC is back but I'm sure ya'll found that out already.

I have pod filters that came with my car - K&N filters from the GReddy intake system I have.

The only beef I have with pods is this: The S2/R2/ Ztune, N1, Nismo, etc, etc. don't use pods. They use the stock (or some sort of upgrade)airbox and still produce 350-500 hp respectively.

I guess I'm trying to convince myself to go back to stock airbox. Anyone have any updates since 2011?

[Skym]

I found out that sizing the airfilter correctly, placement of airfilter is critical, as can lose hp if not done correctly.

Stock airbox works out to around 300-330hp (roughly) and is placed in wrong place for high hp applications. Above 330hp you would be looking at a bigger airfilter, placing infront of radiator with sheilding to suit (protect from rocks, etc).

Just look at this dyno comparison with airfilters on a V8 to understand what I mean that a bigger airfilter, placement of airfilter makes a difference to hp produced (without and with ECU tune to suit, etc) -

http://www.youtube.com/watch?v=jpv8rRx_VlQ&list=PLFrAFYQWJ5E4iMXQsbsqqlgYkyNdQLpoG

Probably not the best comparison, as I think are using MAF, non MAF during test's that makes a difference to restriction, hp produced.

But it's the same place they put airfilter on V8 SuperTourers that lap nearly as quick as open wheel racecars (roughly 2-4 sec slower per lap) -

http://www.youtube.com/watch?v=70u8w8r6ok0

On Gibson Group-A R32 GTR they built something similar (custom airbox) above top radiator support (engine seems to produce around 700hp on that dyno run, but was limited to around 640hp when racing) -

http://www.youtube.com/watch?v=fVdl3p6b2D0

[Bigalow]

Thanks for the information as a matey of fact Mighty Car Mods did a similar test. They concluded that positioning is the best solution for any pod or box.

At this point without further research, my solution for my particular situation is a headlight funnel intake and an ARC box or better.

Btw, my application is for racing not street driving.

Sent from my SC-03D

[Skym]

You're welcome. Could run a cold air feed (hose) from infront of radiator.

[Bigalow]

You're welcome. Could run a cold air feed (hose) from infront of radiator.

Thanks, mate. There's a better view of the Gibson intake you mentioned:


Nice setup but a little too racey imo. Besides, I need to read up on the rules of the club I'll be competing in.

Sent from my SC-03D

[Skym]

You're welcome.

The intake hose clamps are not cheap on that car, I think was around $100 or so per clamp, last time I looked at them.

ARC airbox is said to be not any better than stock airbox when tested on dyno with R34 GTR. Better to run stock air box with a better air feed to stock airbox (I think stock airfeed is just under passenger headlight).